PHL - LHR

£182 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 8/10. 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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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

Tue, 11 Nov - Tue, 18 Nov
American Airlines Logo
14:56 - 07:00PHL-LHR
11h 04m1 stop
American Airlines Logo
07:50 - 13:55LHR-PHL
11h 05m1 stop
£362American Airlines
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Tue, 11 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
£362American Airlines
Find Deal
Tue, 11 Nov - Tue, 18 Nov
Iberia Logo
18:35 - 06:35PHL-LHR
7h 00mdirect
Iberia Logo
19:05 - 15:35LHR-PHL
25h 30m1 stop
£375Iberia
Find Deal
Tue, 23 Sep - Tue, 30 Sep
Virgin Atlantic Logo
13:35 - 08:05PHL-LHR
13h 30m1 stop
Virgin Atlantic Logo
09:40 - 16:52LHR-PHL
12h 12m1 stop
£376Virgin Atlantic
Find Deal
Tue, 11 Nov - Wed, 19 Nov
Iberia Logo
11:00 - 07:00PHL-LHR
15h 00m1 stop
Iberia Logo
18:45 - 15:35LHR-PHL
25h 50m1 stop
£378Iberia
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Mon, 29 Sep - Thu, 9 Oct
British Airways Logo
22:15 - 10:20PHL-LHR
7h 05mdirect
British Airways Logo
18:45 - 16:10LHR-PHL
26h 25m1 stop
£379British Airways
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Wed, 10 Sep - Fri, 19 Sep
British Airways Logo
19:35 - 07:55PHL-LHR
7h 20mdirect
British Airways Logo
12:30 - 15:30LHR-PHL
8h 00mdirect
£381British Airways
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Mon, 20 Oct - Sun, 2 Nov
Aer Lingus Logo
20:30 - 11:10PHL-LHR
9h 40m1 stop
Aer Lingus Logo
07:50 - 16:00LHR-PHL
13h 10m1 stop
£386Aer Lingus
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Sat, 27 Sep - Fri, 3 Oct
Aer Lingus Logo
20:30 - 12:40PHL-LHR
11h 10m1 stop
Aer Lingus Logo
09:50 - 19:00LHR-PHL
14h 10m1 stop
£387Aer Lingus
Find Deal
Tue, 23 Sep - Tue, 30 Sep
Virgin Atlantic Logo
13:35 - 06:45PHL-LHR
12h 10m1 stop
Virgin Atlantic Logo
10:55 - 23:19LHR-PHL
17h 24m2 stops
£397Virgin Atlantic
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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
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 is the most popular stopover airport when flying from Philadelphia to London Heathrow Airport?

Percentage of one-stop return flights from Philadelphia to London Heathrow Airport chosen by KAYAK users via each stopover airport in the last 12 months (only includes trips with the same stopover airport on both legs).

Dublin (DUB) is the top choice – 56% of KAYAK users who clicked on one-stop flights from Philadelphia to London Heathrow Airport picked an itinerary connecting there.

What is the cheapest stopover airport when flying from Philadelphia to London Heathrow Airport?

Average return price for one-stop flights from Philadelphia to London Heathrow Airport clicked by KAYAK users in the last 12 months (only includes trips with the same stopover airport for both legs).

Flights via Boston (BOS) offer the most affordable fares, with an average price of £491 for a return.

Which stopover airport offers the shortest total travel time from Philadelphia to London Heathrow Airport?

Shortest average total travel time for one-stop one-way flights from Philadelphia to London Heathrow Airport via different stopover airports, based on KAYAK user data from the last 12 months.

Consider flying via Dublin (DUB) for the shortest journey. The average one-way travel time for flights connecting there is 9h 48m.

Which stopover airport has the quickest connection when flying from Philadelphia to London Heathrow Airport?

Average duration at different stopover airports for one-stop one-way flights from Philadelphia to London Heathrow Airport, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Dublin (DUB) often has the shortest stopovers from Philadelphia to London Heathrow Airport, with an average time of 3h 18m.

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

Low seasonJanuary
Cheapest flight£182
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly and prices are also 17% 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

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 £304 or less one-way and £382 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

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Tuesday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Wednesday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Thursday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Friday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Saturday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Sunday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

See more direct flights

Direct returns

London Heathrow to Philadelphia

Monday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Tuesday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Wednesday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Thursday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Friday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Saturday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Sunday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

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 10000 reviews
7.5Boarding
7.2Comfort
6.5Food
6.9Entertainment
8.0Crew
Airline reviews

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

2.0 MediocreAnonymous, Aug 2025PHL - TYS
Read more American Airlines reviews

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

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 delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Overall very good, only complaint I have is the crew from CLT to SAT could have collected trash sooner.

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.

Again flight was awesome except British Airways lost both gate checked luggage’s. Still missing

really bad they refused to check in luggages that I had purchased, even showing them the transaction receipt from british airways app the staff in miami was MEDIOCRE

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.

Worst flight experience ever flights canceled. JetBlue told us just did not even bother standing in line to come back in one and a half hours then without any information we had to go pick up all of our luggage and spend over $2000 in accommodation just to get home. JetBlue said that the next flight available for us to get home would be three days later. Absolutely absurd hasn’t offered to give us any compensation do not fly JetBlue horrible company. They said it was based on the weather and the weather is great in all locations that we would’ve been flying to total hoax. I think it’s a conspiracy theory.

The captain gave good announcements and the flight attendants were friendly. The WiFi was pretty good. The plane itself looked very old inside and the seats were very uncomfortable. The screens in the seat backs were the smallest I’ve ever seen. There were so many loud and obnoxious kids on this flight and the parents didn’t do much to try to quiet them down. Some had videos and games on tablets with higher than necessary volume going the whole time.

Too many long delays with JetBlue. Worst major airline that serves JFK but unfortunately I keep going back because of the prices.

My JetBlue experience was nice. The flights ran on time, the aircraft was clean and comfortable, and the flight attendants were attentive. My only issue, which is isolated to the low-cost (budget) option at JetBlue, is that the check in process makes the user feel that they have to buy their seats. The seats offered for purchase are upgrades from the budget seats you get (which are essentially the last seats remaining). The interface should not make it feel like you must purchase a seat.

The plane was late to leave.. Internet was lousy. TV was not working. when we arrived, We stayed on the plane for a long time before we got to the gate. It took us a long time to retrieve our luggage because they didn’t know what carousel to send them to. It was a bad experience.

I especially liked the lead crew officer. His boarding and safety announcements were made with a bit of novelty and humor. The flight also left the gate 10 minutes early and we landed about 20 minutes early… It was a delightful flight…

There were mutliple delays. There was inconsistent, delayed, and poor communication regarding the delays.

flight was delayed for hours with no explanation. The plane was a very old aircraft.

Best travel day I've had in a long time. Everything went perfectly, no delays. 10 out of 10

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.

Not JetBlue's fault but Aer Lingus never explained how to transfer to JetBlue.

I was very disappointed that the online sys allowed me to get the boarding pass for the second leg of the trip, when I clearly request it for both flights!

Excellent as far as the flight is concerned. Faro airport passport check was a huge delay and worrisome re missing the flight. 45 minutes there through passport control

We booked a flight from FCO(Rome) with a stop over at DUB(Dublin) going to JFK. Boarding from Rome was kind of chaotic since the airport I guess is very small and we needed to shuttle to the airplane. The gate agent just let everyone and anyone go without using the sections so that took a lot longer than usual boarding. From drinking to JFk boarding was good and organized. Amazingly the flights was very smooth sailing and we’ve flown American big airplane to small companies before. The aircraft’s itself is on the older side, can’t complain tho because the plane ride wa smooth. For a 3 hour plane ride, nothing was complimentary. But for the longer leg of the plane complimentary snacks, meals and drinks were provided which was great. The food wasn’t bad either. I would fly with them again, great price and good service.

Everything went well. I made my connection which is always a concern.

I appteciate the very courteous staff. The flight was good. Something that wasn't good was that my bag was only checked as far as Dublin and I had a connecting flight to Vienna. (That was a mistake the ORD desk made.) Fortunately the desk at DUB was able to re-tag without me having to re-check in (which initially it seemed I might have to do.)

In business class overhead bins were minuscule. Had to use cabin staff to find a place for my carry-on bag. Boarding process was shambolic, as “passengers who needed assistance in boarding” absorbed an excessive amount of time and attention that Aer Lingus was apparently unprepared for.

It was excellent! The plane left Chicago early. Arrived in Dublin early. The crew was excellent! It was a great experience.

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

Iberia lost my bag, said they found it in another country, said they sent it to me, but never did. Went my whole trip without my stuff, but expecting it to show up because that’s what they said would happen. Their communication sucks, their website sucks, and to top it all off, their seats are small and uncomfortable. They’re bad at their jobs and they should feel bad about themselves. Do not even get me started on the flight home. AVOID!

I described my experience in the previous window. I didn't realize that there would be another opportunity for this flight. Please look at my response in the previous window.

Boarding was 2 1/2 late no explanation Captain said he did not know why, but he rested at home for an extra couple of hours. Food was edible, Nothing more.

I liked the comfort of the plane. It was unexpected from past experiences.

BEWARE!!! Iberia changes your seats at random. I paid for a window seat and they changed it to one in the middle aisle resting against the bathroom- can’t lean back + hear every flush. This on a 11 hour flight.. There were families that were broken up with separate seats all over the plane. Lots of upset passengers showing their seat confirmation to the besieged and helpless airline steward. Also, the gluten free meal was tasteless.

Chair is very high. Your feet cannot touch the ground for 8 hours flight. It was a nightmare. Food was bad.

ground crew and check-in was pathetic - insisted on charging me for luggage even though the ticket said it was already included. They also accidentally sent my luggage through without a luggage tag and had to retrieve it. Generally, it was like a bad movie.

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Everything was very good! I personally struggled with the heat in the cabin for the first 2 hours

Very caring crew on board. Didn’t have dinner as I was sleeping. Was seating in the emergency row so I had comfortable leg room

Had a nice little suite although I couldn’t close the door (but I didn’t ask anyone to help). 5K is a nice seat and very private (you look in on first class). Enjoyable flight and nice crew.

Although the crew were great and the good nice, I might as well have been on Ryanair for the amount of space I had. Not good enough BA. I’d rather pay more and not feel like a human sardine.

Love the A380 - loads of room. Headphone socket on my seat didn’t work. Sounds like a trivial issue? Well when flying long-haul the in-flight entertainment is what keeps you going so when it doesn’t work it’s a disaster. Pay attention to the details please BA. Spoiled what was otherwise an excellent flight with the usual brilliant crew.

Crew were fantastic can’t fault them at all. Couldn’t do enough for us

Crying baby the ENTIRE flight. Not your fault, but I paid 2700 for a premium economy ticket and it wasn't worth it. should have just stuck with coach. flight attendants very mediocre - minimal effort. Plane didn't seem very clean. Didn't have any cleansing wipes - most airlines give you this when you board. Flat screen scrolling didn't work. Toiletry case a joke - why bother at all?

I enjoyed the comfort of Premium Economy. The Purser on London-Nairobi was a little testy, snappish in his tone. I understand stressed, tired, etc but his tone in addressing passengers I found wanting.

Very good crew. The seating in economy plus was excellent, and I slept most of the way. The diabetic meal that I requested was almost tasteless--about a 2 on a ten-point scale.--so I ate little. And why bother serving dinner to fliers at midnight?! I had eaten a meal at the airport six hours earlier. A good breakfast would be better.

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

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