£236 Find Cheap Flights from Philadelphia to the United Kingdom

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 the United Kingdom departing on 11/8. 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, 0 bags

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Cheap Flights from Philadelphia to the United Kingdom

Cheapest return prices found by our users on KAYAK in the last 72 hours
London
London1 stop£577
Manchester
Manchester1 stop£619
Edinburgh
Edinburgh1 stop£622
Birmingham
Birmingham2 stops£589
Bristol
Bristol1 stop£927
Aberdeen
Aberdeen1 stop£645
Liverpool
Liverpool1 stop£874
Leeds
Leeds1 stop£631
Inverness
Inverness1 stop£580
Newquay
Newquay1 stop£821
Nottingham
Nottingham2 stops£999
Cardiff
Cardiff2 stops£771
London
London1 stop£577
Manchester
Manchester1 stop£619
Edinburgh
Edinburgh1 stop£622
Birmingham
Birmingham2 stops£589
Bristol
Bristol1 stop£927
Aberdeen
Aberdeen1 stop£645
Liverpool
Liverpool1 stop£874
Leeds
Leeds1 stop£631
Inverness
Inverness1 stop£580
Newquay
Newquay1 stop£821
Nottingham
Nottingham2 stops£999
Cardiff
Cardiff2 stops£771

Book Cheap Philadelphia to the United Kingdom Plane Tickets

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

Sat, 19 Sep - Tue, 22 Sep
British Airways Logo
22:20 - 07:05
PHL
-
LHR
27h 45m
1 stop
British Airways Logo
06:15 - 17:40
LHR
-
PHL
16h 25m
1 stop
£577British Airways
Mon, 25 May - Mon, 1 Jun
Multiple Airlines Logo
14:57 - 10:00
PHL
-
LGW
14h 03m
1 stop
Multiple Airlines Logo
14:00 - 08:54
LGW
-
PHL
23h 54m
1 stop
£584Multiple Airlines
Wed, 12 Aug - Wed, 2 Sep
Multiple Airlines Logo
06:42 - 10:00
PHL
-
LGW
22h 18m
1 stop
Multiple Airlines Logo
14:00 - 00:25
LGW
-
PHL
15h 25m
1 stop
£586Multiple Airlines
Mon, 14 Sep - Thu, 17 Sep
United Airlines Logo
15:25 - 09:50
PHL
-
BHX
37h 25m
2 stops
United Airlines Logo
06:05 - 16:05
BHX
-
PHL
15h 00m
1 stop
£589United Airlines
Mon, 14 Sep - Thu, 17 Sep
United Airlines Logo
15:25 - 09:50
PHL
-
BHX
37h 25m
2 stops
United Airlines Logo
06:05 - 22:46
BHX
-
PHL
21h 41m
2 stops
£595United Airlines
Thu, 10 Sep - Thu, 17 Sep
JetBlue Logo
19:00 - 10:00
PHL
-
EDI
10h 00m
1 stop
JetBlue Logo
11:30 - 18:04
EDI
-
PHL
11h 34m
1 stop
£622JetBlue
Sat, 12 Sep - Fri, 25 Sep
JetBlue Logo
10:45 - 10:00
PHL
-
EDI
18h 15m
1 stop
JetBlue Logo
11:30 - 18:04
EDI
-
PHL
11h 34m
1 stop
£635JetBlue
Tue, 20 Oct - Tue, 27 Oct
Scandinavian Airlines Logo
09:40 - 09:20
PHL
-
LHR
18h 40m
2 stops
Scandinavian Airlines Logo
06:40 - 22:38
LHR
-
PHL
19h 58m
2 stops
£636Scandinavian Airlines
Tue, 13 Oct - Wed, 21 Oct
Scandinavian Airlines Logo
16:05 - 16:00
PHL
-
LHR
18h 55m
2 stops
Scandinavian Airlines Logo
06:40 - 22:38
LHR
-
PHL
20h 58m
2 stops
£637Scandinavian Airlines
Fri, 11 Sep - Thu, 1 Oct
Aer Lingus Logo
20:25 - 11:15
PHL
-
LHR
9h 50m
1 stop
Aer Lingus Logo
12:00 - 18:55
LHR
-
PHL
11h 55m
1 stop
£648Aer Lingus
Booking Insights

KAYAK's insights & trends for Philadelphia to the United Kingdom flights

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

What is the cheapest Philadelphia to the United Kingdom flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to the United Kingdom from Philadelphia found in the last 72 hours was to Edinburgh, at £621 return. The most popular route is from Philadelphia (PHL) to London Heathrow Airport (LHR), and the cheapest round-trip airline ticket found on this route in the last 72 hours was £663.

What is the cheapest time of day to fly to the United Kingdom?

The average price for all round-trip flights from Philadelphia to the United Kingdom depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to the United Kingdom is generally in the evening, when retur flights cost £581 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally at night, which is peak travel time and where the average cost of a ticket is £627.

Can I save money by flying with a stopover from Philadelphia to the United Kingdom?

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 2 stops stopover the cheapest option at £669 on average.

What is the cheapest month to fly from Philadelphia to the United Kingdom?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to the United Kingdom, 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 the United Kingdom is February, when tickets cost £33 (return) on average. On the other hand, the most expensive months are March and October, when the average cost of return tickets is £1,808 and £1,514 respectively.

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

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

If your flying dates are flexible, you should consider flying to United Kingdom on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Philadelphia to United Kingdom. For your return ticket, we recommend flying on a Tuesday and avoiding Sundays for the best deals.

How far in advance should I book a flight from Philadelphia to the United Kingdom?

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 the United Kingdom, 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 a flight from Philadelphia to the United Kingdom, you should book around 3 weeks before departure, which saves you about 50% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Good to know - Cheap tickets from Philadelphia to the United Kingdom

Low seasonJanuary
Cheapest flight£236
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly and prices are also 13% lower on average.
Flight from Philadelphia to London Stansted Airport

Flights from Philadelphia to the United Kingdom: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Philadelphia to the United Kingdom 
LisaFlew with British Airways
PHL
-
LHR
May 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 Airlines
PHL
-
LHR
May 2025
Don’t put everything in your gate check bags. Make sure you have clothes in your carry on
Verified travelerFlew with British Airways
PHL
-
LHR
Oct 2024
Eat well before boarding if you’re a picky eater.
GlennFlew with British Airways
PHL
-
LHR
Jun 2024
British airways could have many delays, ensure there's enough time for the layover

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from Philadelphia to the United Kingdom?

    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 the United Kingdom.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Philadelphia to the United Kingdom 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 the United Kingdom?

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

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

    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 from Philadelphia to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding a cheap flight from Philadelphia to the United Kingdom

  • Looking for a cheap flight from Philadelphia to the United Kingdom? 25% of our users found tickets from Philadelphia to the United Kingdom for the following prices or less: London £436 one-way - £681 round-trip

Reviews of the top 5 airlines flying from Philadelphia to the United Kingdom

 
Need help choosing which airline to fly with from Philadelphia to the United Kingdom? 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
Aer LingusOverall score based on 1536 reviews
8.1Crew
7.0Entertainment
7.4Boarding
6.6Food
7.2Comfort
Airline reviews

OK overall. Flight was delayed Crew on flight was good

6.0 GoodAnonymous, Apr 2026
ORD - SFO
Read more Aer Lingus reviews

OK overall. Flight was delayed Crew on flight was good

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

This was the smoothest flight I've ever taken with any airline, including Aer Lingus. Typically, there are moments when I feel afraid, but from take off (miraculously seamless!) to cruise, to landing this was a perfect flight. Thank you!

Poor. Plane left EWR late hence missed connecting flight in Dublin. No pro active info from flight staff on connection, only when probed a couple of lies on where we would dock, and on lilelyhood catching connecting flight. Lies as they will have known our EWR-DUB would be parked furthest away from the transit spit - lying it would be next to the AMS flight.

The crew was friendly. The plane was comfortable. In-flight wifi didn't work well at all. The ride was quite turbulent but understandable given the weather.

I flew economy class. Seats were very good and the crew was excellent

There was a 6h delay with limited updates . When we got to Manchester the bus took ages to get to arrivals and we missed our train, dinner reservation. Basically lost a whole day due to arrivals Lingus!!

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

Punctual, smooth flight. Crew excellent and cabin very clean. Paid for WiFi but once you close out you cannot get back in even if you paid for entire flight.

Flight crew was superb. Meal was one of the meals at altitude I’ve had

Purchased through 3rd party vendor which made everything difficult. Unable to check in online. Unable to get flight updates easily, tsa precheck information didn’t carry through, longer time to check in in person. Entertainment looked good but had to purchase conventional headphones to view.

Boarding was fast, easy, and we landed early. The entertainment system was very buggy and kept resetting throughout the flight.

Not having an assigned seat until boarding and then having to check my bag.

Flight emergency landed in Chicago due to “Odor” in back of plane . Had to buy ANOTHER TICKET to get to Boston cash out of my own pocket . Then they would notchange my return flight time without a 400. Charge!!!! Insulting.

I purchased ticket so our daughter ( a minor) can sit next to her mother. No help at gate after kayak insisted that this could be done. She ended sitting by herself

Flight was as expected. But it was delayed an hour. Also, my luggage got damaged. So that sucked especially since the damage made navigating the airport difficult. Walking to get ground transportation is sooo far away now and my checked bag was difficult to carry.

we were an hour delayed after boarding and given no reason. Headsets cost money. Also there were openrows with no one setting in them but we were told we were not allowed to swtich.

Crew was very friendly. Did not like being jammed in the back middle seat. Don’t understand why I can not select an aisle for free based on first come first serve. Also first time I’ve been on a flight which attempted land then circled Detroit airport multiple times.

Terrible. There was a lot of misleading information regarding ticketing, seat upgrades, & boarding group. I also expect my seat will recline. I have back problems & it is very painful for me of the seat doesn’t recline. In addition, when I choose a fare that allows me a carry-on bag, I expect to be able to carry it on. Not be forced to check it. Thos happened on my flight to MCO & back to Boston. Not sure I will ever fly JetBlue again. Further I bought the ticket through hat deal. I will NEVER do that again. They were incapable of providing an accurate record locator # for either leg of the trip. I had to call them before each flight with me VERY stressed about whether I would actually be able to get on my flight. Who does that? Who books flight & then FAILS to give an accurate record locator? Twice!

The flight was delayed 4 hours and the JetBlue people at the counter kept lying to us and telling us it was due to weather however all other flights were going in and out of NY and FL. Then they lied that the plane had to stop to refuel. Then they lied and said the plane needed a tire change. JetBlue is the worst. Then they gave a lot of people meal vouchers however I didn’t know they did that and they didn’t offer anything to me.

Flight left early and arrived 30 MINUTES early at the destination. Smooth trip.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

I appreciate that I finally got the seat I paid extra for this time. Thank you

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

They are always late and seats was also not having working charger

In general, I've had excellent experiences with Iberia flights and will continue to use them. In this last flight there were two things that didn't go right. I didn't get the kosher meal I had pre-requested when I had checked in on-line. Things worked out OK as we ended up eating the fish and vegetarian choices, which were really good. The other issue was that some movies for me and my wife started fine but after 8-12 minutes the content just switched to something else. The flight attendant reset our entertainment systems, but the problem persisted. We ended up choosing other movies/TV shows that did work fine.

Flight was fine - however my husband's checked in case was damaged, and mine still has not arrived

Awful. They didn't even show concern that her connecting flight( Dallas to Mardrid) was gone/missing. I don't understand how that is even possible. Rudest answer from one of the crew was that American Airlines sold the tickets to somebody else. My daughter was not in the list.

The flight was canceled on a Thursday last minute. I lost thousands of dollars in hotels and car rental

Excellent lie flat seat for premium economy! Great staff. Bad food . Not so great entertainment. My bag didn’t make it either.

Really like the idea experience on this airline I will use again

The boarding procedure got confusing because they wanted to weigh everyone’s carry-on. Apparently mine was 3 1/2 kg over their limit. I didn’t know they had a limit. And at the check-in desk, nothing was said about this. They wanted me to check the carry-on at no charge and that would have been fine except then they told me at my connection in London I would have to go outside to baggage claim retrieve my bag, and then recheck it. In other words, they could not check it to my final destination, only to London. I told him this was unacceptable so after a few minutes of discussion, they came back and said that my bag would be OK to carry on the plane. It seems that if you have a connection then the weight is not as important. Then when I actually went to board the boarding agent said I needed a tag indicating that my bag had been weighed, even though she had just five minutes ago talked to the same person who cleared me. Lots of confusion seems like a very bad process. They need to improve this.

My flight being automatically moved messed up my travel plans, and I had to quickly find an alternative mode of transportation. I couldn’t get a refund from any of the companies involved. Kayak, Ibiza, or Vueling. I am still unsure of how to settle my concern.

Plane delayed due to weather. Plane boarded, then told to unboard due to a maintenance issue.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

The whole experience was excellent, O can say out from Miami the best airline to travel with for any European destination. Since the ground staff to the inflight crew attention was great, service on board 10 of 10. Finally the 380 is very confortable and nice to travel.

All crew except 1 were excellent. When I asked assistance with business class seat conversion to a bed (not being familiar as never used before but have numerous times with other airlines) crew member helped very reluctantly. I should have told her that business class seat conversion is totally different in each airline such as Delta, New Zealand Air and United. Sorry it was my 1st time with America Airlines. Now I know, I won't bother asking assistance in future.

The seats in Premier Economy were very comfortable. The food was better than average. The way British Airways handled our seating was atrocious.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

Overall ok. Best part has always been the sundae dessert.

I’ve never been on a trans-Atlantic (or Pacific) flight where the seats don’t recline—not even a little. I asked my seat mate when BA starting doing this and he said “Oh, a few years ago.” I couldn’t sleep, with my head falling forward waking me continuously, and came off the plane incredibly stiff. I booked a Premium Economy seat to get a more comfortable seat, which was worse than most basic Economy seats I’ve ever booked.

Nice aircraft. Good crew. Delayed departure from Houston, but arrived on time in London. Main thing I don’t like about flying BA is having to transit through security in London Heathrow. A major pain!

The gate agent made me check my carry-on in Denver, even though I've traveled all over taking this case on the plane. Beware folks. Food in Premium Economy was quite good - excellent blanket! Flight attendants on the Heathrow-to-Budapest flight on 3-27-2026 were quite snappy. I got a frown when asked to unscrew the water bottle cap for me (I had a cast on my right arm). Also woke up right when they were handing out biscuits. She had given my rowmates one and was in the process of giving water when I asked for a biscuit. She scolded me and said, "You snooze, you lose". She did give me one, but I thought that comment was uncalled for.

Wish the food and overall service was better. They treat Business class passengers same as economy

Everything you need to know for your flight from Philadelphia to the United Kingdom

Information on your arrival and departure airports