PHL - LON

£334 Find Cheap Flights from Philadelphia to London

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to London departing on 24/9. 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

 
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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Flights Deals

Cheap Flights from Philadelphia to London (PHL-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Philadelphia to London 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 London

mié., 24 sep. - lun., 29 sep.
 Logo
06:45 - 07:55PHL-LGW
20h 10m1 stop
 Logo
10:00 - 13:29LGW-PHL
32h 29m1 stop
vie., 26 sep. - lun., 29 sep.
 Logo
06:45 - 07:00PHL-LGW
19h 15m1 stop
 Logo
10:00 - 13:29LGW-PHL
32h 29m1 stop
mié., 3 sep. - mar., 30 sep.
JetBlue Logo
18:40 - 09:35PHL-LGW
9h 55m1 stop
JetBlue Logo
12:10 - 21:24LGW-PHL
14h 14m1 stop
£411JetBlue
Find Deal
mar., 26 ago. - mié., 3 sep.
JetBlue Logo
18:35 - 09:35PHL-LGW
10h 00m1 stop
JetBlue Logo
12:10 - 21:24LGW-PHL
14h 14m1 stop
£412JetBlue
Find Deal
mié., 13 ago. - jue., 21 ago.
British Airways Logo
19:40 - 07:55PHL-LHR
7h 15mdirect
British Airways Logo
06:15 - 14:05LHR-PHL
12h 50m1 stop
£442British Airways
Find Deal
mié., 13 ago. - vie., 22 ago.
British Airways Logo
17:29 - 09:30PHL-LHR
11h 01m1 stop
British Airways Logo
07:00 - 14:05LHR-PHL
12h 05m1 stop
£445British Airways
Find Deal
mié., 13 ago. - vie., 22 ago.
Iberia Logo
22:15 - 10:20PHL-LHR
7h 05mdirect
Iberia Logo
10:05 - 13:10LHR-PHL
8h 05mdirect
£464Iberia
Find Deal
mié., 23 jul. - mar., 29 jul.
Iberia Logo
18:30 - 06:40PHL-LHR
7h 10mdirect
Iberia Logo
12:30 - 15:25LHR-PHL
7h 55mdirect
£491Iberia
Find Deal
jue., 30 oct. - mar., 11 nov.
Aer Lingus Logo
18:30 - 08:05PHL-LHR
9h 35m1 stop
Aer Lingus Logo
08:50 - 16:00LHR-PHL
12h 10m1 stop
£543Aer Lingus
Find Deal
mar., 12 ago. - lun., 18 ago.
Aer Lingus Logo
18:50 - 12:45PHL-LCY
12h 55m1 stop
Aer Lingus Logo
20:30 - 11:45LCY-PHL
20h 15m1 stop
£697Aer Lingus
Find Deal
Expert advice

Expert advice for your flight from Philadelphia to London

 
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 lower cabin altitude and higher humidity for a more comfortable journey.


Finnair's Economy Comfort offers more legroom for a small additional charge.

Read more about Finnairby Gabriel Leigh
British Airways

BA's premium economy offers 18 cm extra legroom, ideal for long flights.


BA's cabin crew are known for their professionalism and proactive service.

Iberia

Iberia's business class offers all-aisle access and comfortable bedding.


Iberia's Wi-Fi is available on most flights, with free messaging for loyalty members.

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
Useful Info

KAYAK's insights & trends for Philadelphia to London flights

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

What is the cheapest Philadelphia to London flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Philadelphia to London.

Our data shows that the cheapest route for a return flight from Philadelphia to London cost £457 and was between Philadelphia (PHL) and London Heathrow Airport (LHR). On average, the best prices are found if you fly this route. The average price for a return flight for this route is £457.

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

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

For Philadelphia to London, Tuesday is the cheapest day to fly on average and Thursday is the most expensive. Flying from London back to Philadelphia, the best deals are generally found on Tuesday, with Sunday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to London, 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 is February, where tickets cost £489 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £845 and £740 respectively.

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

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 £504 on average.

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

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, 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, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.


Good to know - Cheap tickets from Philadelphia to London

Low seasonFebruary
High seasonAugust
Best time to beat the crowds (19% less expensive on average)
Most popular time to fly and prices are also 6% lower on average.

When to book flights from Philadelphia to London

Are your dates flexible? Find out the best times to travel from Philadelphia to London 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 London: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Philadelphia to London 
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 flights from Philadelphia to London

  • Is it possible to fly from Philadelphia International Airport (PHL) to London non-stop?

    You can find non-stop flights from PHL to London Heathrow Airport (LHR). Multiple airlines offer flights with one and two stops, including American Airlines, British Airways, United Airlines, and Delta Air Lines, with common layovers in New Jersey, Miami, and Washington DC.

  • Are there currency exchange offices at London Heathrow Airport (LHR)?

    Yes, there are a few currency exchange desks at LHR terminals, making it not only safer but convenient as you move around with money. At London Heathrow, you have the choice of ordering the currency online then collecting it as you pass through the airport, or getting currency conversion on the spot. You will find that the conversion prices are different for these two options.

  • Does London Heathrow Airport (LHR) offer any facilities for families?

    Heathrow Airport has several amenities suitable for groups of people traveling with children, including complimentary kid’s meals, baby changing areas, family-friendly parking, as well as a free Mr. Adventure Stay and Play areas filled with slides, coloring stations, and activity sheets.

  • Are there any services for travelers with limited mobility at London Airports?

    Disability assistance services should be arranged for before your day of travel. You will find that the airport bathrooms are readily equipped to cater to passengers with wheelchairs, with most having private bathrooms for people with reduced mobility.

  • What is the cheapest flight from Philadelphia to London?

    In the last 3 days, the lowest price for a flight from Philadelphia to London was £199 for a one-way ticket and £454 for a return.

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

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

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

    The Boeing 787-9 Dreamliner is the aircraft model that flies most regularly on the Philadelphia to London flight route.

  • Which airline alliances offer flights from Philadelphia to London?

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

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

    There are direct flights from Philadelphia to London 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 £430 and an overall rating of 7.3, JetBlue is the most popular choice. Aer Lingus is also a great choice for the route, with an average price of £619 and an overall rating of 7.1.

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

    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.

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

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

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

    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 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?

    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 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

  • Looking for a cheap flight from Philadelphia to London? 25% of our users found flights on this route for £330 or less one-way and £548 or less round-trip.
  • Philadelphia International Airport (PHL) is the main airport in the city of Philadelphia and is located approximately 11.3 miles from the city center. Since the airport is centrally located, it can be accessed by a majority of residents in Philadelphia, as well as neighboring cities such as Ardmore, Doylestown, Amber, and Lambertville in New Jersey.
  • There are six major airports in London: London Gatwick (LGW), London Luton (LTN), London City (LCY), London Heathrow (LHR), London Southend (SEN), and London Stansted (STN). If you will be staying in the city, you can opt for flights that land at London Heathrow or London City as they are conveniently located on the London Underground and DLR systems.
  • If you are traveling to London for business, you’ll find that the London City Airport is a good airport for your trip as it is conveniently situated in central London and is easily accessible to the city.
  • The distance between London City Airport and Central London is roughly 6.2 miles. If you want to get to the city center via public transportation, you can take the DLR train for roughly 22min. A taxi or car will get you there in around 30min. If you are coming from London Heathrow, you can use trains exiting from Terminals 2 and 3, which leave every 15min and can get you to central London in around 15min.
  • As you wait for your flight, there are several amenities you could take advantage of at the Philadelphia International Airport. For one, head on over to one of the 50 eateries on-site and grab a quick bite. The airport also has a virtual library available and open to passengers. Alternatively, the XpresSpa has several locations offering manicures, pedicures, massages, and facials if you would like to pamper yourself a little.

Prefer to fly direct from Philadelphia to London?

Find which airlines fly direct from Philadelphia Airport to London, which days they fly and book direct flights.

Direct departures

Philadelphia to London

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 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
See more direct flights

Top 4 airlines serving from Philadelphia to London

 
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 London? 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.
7.3
JetBlueOverall score based on 2925 reviews
7.5Boarding
6.7Food
8.0Crew
7.6Comfort
7.3Entertainment
Airline reviews

Communication since no reason or explanation was given for 3 hrs delay

2.0 MediocreLana, Jun 2025HPN - PBI
Read more JetBlue reviews

Communication since no reason or explanation was given for 3 hrs delay

The flight departed more than 1 hour late. Leg room is bigger than most airlines

Flight was delayed several 3 hours - no reason was given and no communication what so ever.

No overhead baggage room even though I was seated in row 2. Consequently had to check in my carry on bag. Baggage carousel was jammed. Took 45 min to get my bag.

Excellent from start to finish. All staff members were amazing!

Excellent. Although they used to greet me as a mosaic member and provide a free drink, early boarding helps me to keep coming back to JetBlue.

Cancelled flight with no specific instructions to get a boarding pass for another flight. The whole flight of people were in line for an hour because there was only 1 person to help at the desk. This was unusual for JetBlue.

It was too hot in the cabin. The AC did not help.

Except for the 28 minute delay leaving and the earlier reschedule to a later takeoff time the flight was good.

Loved the leg room and tvs screens on the seats and free WiFi. Wish the price was lower and could save by rebooking

At check-in the unmanned machines said QR code was invalid so had to queue for over an hour to check in bags

i used to fly aer Lingus regularly but due to price - poor seating etc i have been using other carriers - i now have aer lingus in my state and the price is always the highest - i have flown to Ireland 11 times in last 24 months and have not used Hartford because of price

I dont fly them much anymore. Other carries offere better pricing and better seating options

Seats weren't very comfortable for a long haul flight but the service made up for it.

I liked how they looked after couples by providing a row of 4 seats if available.

Food was very bad. Boarding was disorganized and messy. Crew was friendly

I believe it was short flight in plane I understand not that much compared to other airlines but weighting for checkin was too long need extra person for checkin or Atleast someone to let the customer knows don’t worry someone will be here shortly.

Gate agents kind of serious. Had to wait til arriving at gate to choose seats. Thankfully they did give us seats together! And grateful the honored our age, giving us seats at the front.

Very polite and helpful staff. Jet blue…ok, but not as helpful!..

Seat was very uncomfortable. The worst in all of my travels. It sagged in the middle, worse than anything any airline can offer. Not flying aer lingus again.

From boarding, to attention in flight, I couldn’t fault it.

Not having to check carry on bags when plane wasn’t full. (The told us it was)

I was in business class for the 8 hour flight where: 1. The WiFi did not work 2. The entertainment system did not work 3. We were told there were no hot drinks for the entire flight

I had an issue with the name on my ticket vs my passport name. I was very upset that the Iberia ticket clerk had no authorization to help me and I was left to fix it. It took 19 calls of persons promising to accomplish and not doing anything before I reached someone who helped me in 10 minutes. Two of them even hung up on me. I missed my original flight because of this. Terrible customer service.

The flight was delayed twice. When the crew explained about the debris causing flat tires, I was glad they took the time to change all four.

My carry-on bag was taken from me when I boarded. It was checked through to London at no charge. It took a big of shuffling, but I was glad not to need to mind it until baggage claim.

Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.

Flight delayed Service could be better Iberia staff are not really friendly

They cancelled the flight)(they said bad weather but many other flights took off) and made us wait 5 hours in line to figure out what to do. We ended up making a new flight the next day on another airlines...I hope they honor giving us our money back

Awful. The flight wasn't actually operated by Iberia, but by American Airlines. I was unable to get my boarding pass and as a result missed my connecting flight.

The payment system was not working so was unable to connect wifi the entire flight

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

Paid $180 for seat selection, and selection essnt honored. Have to call for a refund.

My flights were great and the crew on them was lovely especially the London to Barcelona flight as Al & AJ were so amazingly nice. I wish they would be my crew always as they have the best customer service. Sadly both flights were delayed the first one from Vegas was because they clearly loaded the cargo wrong the plane was off balance making us 2 hours late. This made me miss my connection and sadly it was challenging rebooking while I was on the flight. I will never use Kayak again as there was no customer service number or live chat and you rebooked me on a flight 2 days later. I had my mom call BA to change it which she did after spending an hour on hold. This should not be so difficult. My second flight was an hour delayed due to not being able to disconnect the bridge from the plane but I did finally make it home.

The delay was not communicated via text and the person who helped with check in also didn’t inform me about the delay. I ended up missing my connection and it was a waste of 5 hours. The crew didn’t mention there would be someone at the gate informing of if I would be rebooked and there was no signage. Overall a very poor experience. The British Airways app was also very buggy, and didn’t work. I will avoid flying with British Airways when possible.

A little better than outward journey but mild chaos at the boarding gate because some people with boarding cards from connecting flights had cards which weren't recognised

The BA business class cabin is excellent,very comfortable for sleeping but the service could be improved.

Surly rude flight attendants. I ordered the chicken and was given a vegetarian meal with no explanation and no opportunity to change it. I tried to order another beverage and was told by the young humorless flight attendant to “wait”. And she never came back. The seats were very uncomfortable and cramped. The last time I flew British Airways was many years ago but I remember it was amazing and the crew were very charming. This was a terrible disappointment given the cost of the flight.

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

Information on your arrival and departure airports

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