PHL - LHR

£192 Find Cheap Flights from Philadelphia to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Heathrow departing on 15/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to London, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Philadelphia to Heathrow (PHL-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Philadelphia to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Philadelphia to Heathrow

Sun, 9 Nov - Tue, 18 Nov
Air Canada Logo
15:30 - 20:35PHL-LHR
24h 05m2 stops
Air Canada Logo
09:00 - 22:46LHR-PHL
18h 46m2 stops
£419Air Canada
Find Deal
Sun, 9 Nov - Tue, 18 Nov
Air Canada Logo
15:30 - 07:10PHL-LHR
10h 40m1 stop
Air Canada Logo
09:00 - 15:51LHR-PHL
35h 51m2 stops
£425Air Canada
Find Deal
Sun, 9 Nov - Tue, 18 Nov
Air Canada Logo
15:30 - 20:35PHL-LHR
24h 05m2 stops
Air Canada Logo
09:00 - 22:46LHR-PHL
18h 46m2 stops
£427Air Canada
Find Deal
Wed, 3 Dec - Tue, 16 Dec
Lufthansa Logo
15:30 - 07:10PHL-LHR
10h 40m1 stop
Lufthansa Logo
06:30 - 16:05LHR-PHL
14h 35m1 stop
£430Lufthansa
Find Deal
Tue, 11 Nov - Tue, 18 Nov
Multiple Airlines Logo
15:30 - 07:10PHL-LHR
10h 40m1 stop
Multiple Airlines Logo
06:50 - 14:47LHR-PHL
12h 57m2 stops
£435Multiple Airlines
Find Deal
Wed, 31 Dec - Thu, 15 Jan
Multiple Airlines Logo
15:30 - 07:10PHL-LHR
10h 40m1 stop
Multiple Airlines Logo
06:50 - 14:47LHR-PHL
12h 57m2 stops
£438Multiple Airlines
Find Deal
Tue, 4 Nov - Thu, 13 Nov
Lufthansa Logo
17:40 - 09:45PHL-LHR
11h 05m1 stop
Lufthansa Logo
06:30 - 16:05LHR-PHL
14h 35m1 stop
£445Lufthansa
Find Deal
Wed, 12 Nov - Tue, 18 Nov
JetBlue Logo
09:22 - 06:55PHL-LHR
16h 33m1 stop
JetBlue Logo
09:20 - 15:57LHR-PHL
11h 37m1 stop
£451JetBlue
Find Deal
Tue, 11 Nov - Tue, 18 Nov
American Airlines Logo
19:45 - 07:50PHL-LHR
7h 05mdirect
American Airlines Logo
07:50 - 13:55LHR-PHL
11h 05m1 stop
£453American Airlines
Find Deal
Wed, 12 Nov - Tue, 18 Nov
American Airlines Logo
18:35 - 06:35PHL-LHR
7h 00mdirect
American Airlines Logo
07:50 - 13:55LHR-PHL
11h 05m1 stop
£454American Airlines
Find Deal

Everything you should know

Our travellers' advice
AI-generated summary based on content written by travel experts and KAYAK users
BA's premium economy offers extra legroom for comfort.
Eat well before boarding if you're a picky eater.
Expert advice
Expert advice
+1
+1
Expert advice
Expert advice
+1
Top airlines
Air Canada
Cheapest • from £419 (return)
American Airlines
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 20% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
£419
Overall average: £582
Air Canada
Sun 9/11Tue 18/11
PHL - LHR • 2 stops
Cheapest direct flights
£472
Typical prices: £519-£838
Iberia
Sun 9/11Tue 18/11
PHL - LHR • Direct
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Heathrow!
Booking Insights

KAYAK's insights & trends for Philadelphia to Heathrow flights

Get data-powered insights and trends into flights from Philadelphia to Heathrow to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Philadelphia to London Heathrow Airport?

The average price of all round-trip flights from Philadelphia to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to London Heathrow Airport on a Tuesday and more expensive on a Thursday. On your return trip to Philadelphia, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

What is the cheapest month to fly from Philadelphia to London Heathrow Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to London Heathrow Airport is September, where tickets cost £494 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is £920 and £750 respectively.

Can I save money by flying with a stopover from Philadelphia to London Heathrow Airport?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £539 on average.

How far in advance should I book a flight from Philadelphia to London Heathrow Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to London Heathrow Airport, you should book around 2 weeks before departure, which saves you about 41% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Expert advice

Expert advice for your flight from Philadelphia to Heathrow

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Finnair

Finnair's A350 offers a quiet cabin with lower altitude, ensuring you arrive feeling better.


Finnair's business class offers a unique seat pod for a comfortable sleeping experience.

Read more about Finnairby Gabriel Leigh
British Airways

BA's premium economy offers 18 cm extra legroom, making long flights more comfortable.


BA's cabin crew are professional and proactive, enhancing your flight experience.

Iberia

Iberia's business class offers all-aisle access and comfortable bedding for restful long-haul flights.


Iberia's in-flight dining showcases Spanish cuisine with two meals, adding excitement to your journey.

Read more about Iberiaby Marisa Garcia
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Duncan Madden

Duncan Madden

Expert on British Airways

Duncan Madden

Duncan Madden

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more
Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialising in airline interiors and regulations. 10 years ago, she pivoted to journalism. She shares her insights in leading aviation, travel and business publications and on her site, FlightChic.

Read more

Good to know - Cheap tickets from Philadelphia to London Heathrow Airport

Low seasonJanuary
Cheapest flight£192
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly and prices are also 20% lower on average.
Flight from Philadelphia to London Heathrow Airport

When to book flights from Philadelphia to Heathrow

Are your dates flexible? Find out the best times to travel from Philadelphia to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from Philadelphia to Heathrow: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Philadelphia to Heathrow 
LisaFlew with British AirwaysPHL-LHRMay 2025
Make sure you have enough time in London if you have a transfer flight. I would recommend at least 2 hours.
RadicalFlew with American AirlinesPHL-LHRMay 2025
Don’t put everything in your gate check bags. Make sure you have clothes in your carry on
Verified travelerFlew with British AirwaysPHL-LHROct 2024
Eat well before boarding if you’re a picky eater.
GlennFlew with British AirwaysPHL-LHRJun 2024
British airways could have many delays, ensure there's enough time for the layover

FAQs for booking Philadelphia to London Heathrow Airport flights

  • What is the cheapest flight from Philadelphia to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Philadelphia to London Heathrow Airport was £255 for a one-way ticket and £558 for a return.

  • Which airlines offer Wi-Fi service onboard planes from Philadelphia to London Heathrow Airport?

    All the following airlines offer inflight Wi-Fi service on the Philadelphia to London Heathrow Airport flight route: American Airlines, British Airways, Iberia, Finnair, Aer Lingus, and Lufthansa.

  • Which aircraft models fly most regularly from Philadelphia to London Heathrow Airport?

    The Airbus A350-1000 is the aircraft model that flies most regularly on the Philadelphia to London Heathrow Airport flight route.

  • Which airline alliances offer flights from Philadelphia to London Heathrow Airport?

    oneworld is the only airline alliance operating flights between Philadelphia and London Heathrow Airport.

  • On which days can I fly direct from Philadelphia to London Heathrow Airport?

    There are direct flights from Philadelphia to London Heathrow Airport on a daily basis.

  • Which is the best airline for flights from Philadelphia to London, JetBlue or Aer Lingus?

    The two airlines most popular with KAYAK users for flights from Philadelphia to London are JetBlue and Aer Lingus. With an average price for the route of £565 and an overall rating of 7.2, JetBlue is the most popular choice. Aer Lingus is also a great choice for the route, with an average price of £739 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Philadelphia to London Heathrow Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Philadelphia is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to Philadelphia with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to London Heathrow Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Philadelphia to London Heathrow Airport

  • Looking for a cheap flight from London Heathrow Airport to Philadelphia? 25% of our users found flights on this route for London Heathrow Airport or less round-trip.

Prefer to fly direct from Philadelphia to London Heathrow Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Philadelphia to London Heathrow.
Find which airlines fly direct from Philadelphia Airport to London Heathrow Airport, which days they fly and book direct flights.

Direct departures

Philadelphia to London Heathrow

Monday

American Airlines, British Airways

American Airlines, British Airways

Tuesday

American Airlines, British Airways

American Airlines, British Airways

Wednesday

American Airlines, British Airways

American Airlines, British Airways

Thursday

American Airlines, British Airways

American Airlines, British Airways

Friday

American Airlines, British Airways

American Airlines, British Airways

Saturday

American Airlines, British Airways

American Airlines, British Airways

Sunday

American Airlines, British Airways

American Airlines, British Airways

See more direct flights

Direct returns

London Heathrow to Philadelphia

Monday

American Airlines, British Airways

American Airlines, British Airways

Tuesday

American Airlines, British Airways

American Airlines, British Airways

Wednesday

American Airlines, British Airways

American Airlines, British Airways

Thursday

American Airlines, British Airways

American Airlines, British Airways

Friday

American Airlines, British Airways

American Airlines, British Airways

Saturday

American Airlines, British Airways

American Airlines, British Airways

Sunday

American Airlines, British Airways

American Airlines, British Airways

See more direct flights

Reviews of the top 5 airlines flying from Philadelphia to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Heathrow? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 11040 reviews
6.9Entertainment
7.2Comfort
7.5Boarding
6.4Food
8.0Crew
Airline reviews

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

10.0 ExcellentGary, Oct 2025JFK - LHR
Read more American Airlines reviews

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

The trip was smooth but the crew were very abrupt, snatching things before finished and being quite snappy when asked questions.

My wife and I love to travel, so we fly a lot. We've already logged 381,075 miles and with practically every major airline. But this flight was very disappointing. It started off well, with no delays and a new plane. But when lunchtime approached, all that good impression was ruined. Instead of white tablecloths, we were offered small, dark placemats, which, as it turned out, were perfectly adequate for the food. All the food offered—and my wife and I only took fish, and the meat—was not just bad, it was downright disgusting and not heated enough. The same applies to the appetizers. This was the first time in many years of traveling that we've been offered such disgusting food.

Lost luggage stuck no clothes and no word after 2 days leaving on cruise no stuff or clothes

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

The flight was canceled 3 hours after original take off time

Pathetic check in experience at JFK. Everything is self check in. Not enough staff present to help with when the check in process or the kiosk gets stuck. Staff present not welcoming or pleasant at all. On the other hand the NY based flight crew was great. Courteous and friendly throughout the flight. Special meals leave a lot to be desired. Kids meals should be made available when kids are flying and same goes for special kids meals too.

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

More choices on menu. Seemed only thing offered was Scottish, and while that’s good for the Scot’s it doesn’t help the Americans who don’t like that food. And I really hate it when, during sleep time the attendants have a very loud conversation right over you. Lastly, I paid 5000 dollars for business class, and having to pay more to choose my seat early is really an insult. Seems greedy

The chicken adobo was a little too spicy but good otherwise. My personal opinion. Movie selection could be improved, too many horror movies. Could add a few more chick flicks! The flight was bumpy at times. We arrived a little early too! Flight attendants friendly.

Plane was in bad shape. TV’s and WiFi didn’t work. Plane need a refresh. Not enough room for bags.

There was a fowl odour coming from the lavatory the entire flight

Everything was great. I liked the text updates so that I never miss a gate change & I have all the latest info.

I don’t usually fly budget airlines or airlines in the United States. It was as good as any other airline. The seats are comfortable and the airline attendants are not rude & surly. Very nice flight (s).

No internet on a flight over three hours in this age is criminal. Staff inattentive and dismissive

They have the most inexperienced / rude flight staff I’ve encountered

very difficult boarding process - aggressive passengers not the friendliest crew

WiFi was not eorkig (again) And the plane was from 1990 with the screens which were.not touch and most didn’t even work and if lucky could tune in tv

I paid extra for a seat closer to the front. The TV didn’t work at all for the entire flight. Would have been nice to know before I purchased an “upgraded “ seat

It was great. I had never flown on JetBlue before, but would be very happy to fly with them in the future.

They specifically asked about my flight from bordeaux to Dublin, which was fine. A little lacking but for a 1 and a half hour flight - it was more than enough. I transferred at Dublin and went to Newark. And wow that flight was incredible.

Fast and sensible boarding was absolutely amazing. But extortionate wifi and seats that barely moved, making me unable to sleep, didn't do a lot of favors.

I liked the front row seats. A lot of leg room. The check-in window needs to be longer

My flights with Aer Lingus were very good and I will definitely fly with them. Again in future trips to Ireland and Scotland.

Too hot. Asked for an extra glass of water and was ignored. Asked to sit in empty seats that were open because it was so hot and crowded and was denied and the seats were empty the entire flight

Terrible leg room - I’m 5’3” and my knees were touching the seat in front of me. When the person sitting in front of me leaned back, there was about 15 inches of space between my head and the TV screen which made it awkward to view movies. Last year they had decent food, but this year the only tasty item on the trip was dessert.

The flight was delayed leaving Philadelphia due to “catering” and consequently arrived in Dublin some 75 minutes later than scheduled. Consequently this caused me to miss my connecting flight to Glasgow and I had to spend the night in Dublin.

The flight from Cincinnati to Philadelphia was satisfactory and uneventful.

It was truly a horrible flight. We were delayed almost 2 hours. The seats were so tiny, my legs were hurting the entire flight. When i finally made it to Ireland i missed my connecting flight because we left Newark late. I will most likely never fly Aer Lingus again

Terrible. The test of an airline is how they deal with problems. There is very little to differentiate between airlines. Aer Lingus failed absolutely. They lost one of my bags even though we had more than a 2 hour connection in Dublin. Trying to get it back has been awful. In checking on line I can see that the bag is in Edinburgh and it was supposed to be delivered today. It wasn't. The number we have in the UK doesn't answer. I had to pay for an international call to speak to somebody. All the woman at the call centre could say was be patient wait. I can tell you when it will be delivered nor can I tell you who the courier is.

Terrible customer service. I booked business class and the counter agent didn’t bother asking me about any choice or preferred seat, basically assigned me that last seat and couldn’t even answer if it was a business class seat. Also iberia lost my suitcase on my flight from JFK to MAD with the layover in BCN. Useless customer service at the counter. Thank goodness I happened to check the baggage claim area of the next flight in…there it was.

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

We departed late but made up most of the time in flight. Our ticket was pure economy, so it wasn’t anything fancy; however, I heard that we arrived in Madrid at the exact same time that First Class passengers arrived! Overall, our experience was similar to what we had on other American Airlines transatlantic flights - good value at a reasonable price. We were even able to get our carry-on baggage onto the plane without needing to gate check it.

The crew were friendly and helpful. Iberia lost our luggage on arrival, Friday and we didn't get it until Sunday at 10:00 p.m. local Malaga time. I also paid $382.80 for seat assignments but two out out of the four were not together. Iberia mentioned that it was because the plane was delayed in Madrid before our flight began in LAX. They should compensate us half of my payment.

It was fortunate that the flight arrived in London in accordance with schedule, and the luggage was promptly transferred to the luggage carousel. However, I find it concerning that even minor issues in economy cabins are prevalent within the industry. American Airlines, in particular, appears to have the least legroom and feels more crowded due to the proximity of neighboring passengers. Additionally, the crew’s adherence to protocol is inconsistent. While they may enforce certain rules set by the FAA on a select few individuals, they often overlook numerous violations, such as failing to reset seat recline during landing.

Easy and organized getting in and out of the flight

We liked the flight but while we purchased an aisle seat, our seats had a different configuration on this flight. A fellow passenger suggested that the airplane had been changed. Too bad we were not informed and had no chance to modify our seat preferences. We were stuck in the window and middle seats with no chance to walk around and go to the bathroom without disturbing our sleeping fellow passenger.

The crew were not very personable. The crew did not serve tea or coffee. The bathroom was not kept clean. Two out of the 5 toilets in the cabin weren't working.

It was extremely cold in the back of the plane. The seats are uncomfortable and space very small. Crew was excellent as usual.

Check in needed to be in person, not nice. Also I won’t do connections in Charlotte again because you need to go through security again and short connections become a problem

Moved me away from my family and refused to fix it.

I have always been pleased with their service. Would not change a thing

Seating and food was the worst we have experienced in 35 years of traveling for both personal and busines .

Economy seats felt more cramped than other flights we have taken.7 hr, painful sitting hours 6 and 7. Web site difficult to deal with. Originally put in for 1 special meal due to type 2. Meal was awful. Tried to change selection to standard for return flight, on app and website, unable to complete that action.

I was sleeping during dinner service, no one bothered to offer meal later, I remained hungry….until I got a morning sandwich!

Need to offer Better food from LAX to London Service from London to Delhi very delayed after take off.

Connection at Hethrow was horrible..We couldn't get out of the plane for an hour as they were buying people to the airport and there were not enough busses. We had 2 and half hf between flights so it was very tight. After departing plane we had to go thru security again. People with less time in between connections missed their flights

Horrible… I was downgraded without notice, had to sit in economy and given my back injury was in pain most of the journey. I expect to be reimbursed for this inconvenience and after my return flight home, I never plan to fly with British Airways again.

Great crew and food and beverage. Seating tight but not the airline's fault. Will definitely fly BA in future!

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

Everything you need to know for your flight from Philadelphia to Heathrow

Information on your arrival and departure airports

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