£185 Find Cheap Flights from Philadelphia to the United Kingdom – Compare and Save

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 27/7. 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£645
Manchester
Manchester1 stop£562
Edinburgh
Edinburgh1 stop£573
Birmingham
Birmingham2 stops£605
Bristol
Bristol1 stop£688
Aberdeen
Aberdeen1 stop£628
Liverpool
Liverpool1 stop£614
Leeds
Leeds1 stop£687
Inverness
Inverness1 stop£538
Newquay
Newquay1 stop£835
Cardiff
Cardiff2 stops£757
London
London1 stop£645
Manchester
Manchester1 stop£562
Edinburgh
Edinburgh1 stop£573
Birmingham
Birmingham2 stops£605
Bristol
Bristol1 stop£688
Aberdeen
Aberdeen1 stop£628
Liverpool
Liverpool1 stop£614
Leeds
Leeds1 stop£687
Inverness
Inverness1 stop£538
Newquay
Newquay1 stop£835
Cardiff
Cardiff2 stops£757

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

Mon, 17 Aug - Mon, 24 Aug
American Airlines Logo
22:15 - 15:00
PHL
-
INV
11h 45m
1 stop
American Airlines Logo
15:45 - 12:15
INV
-
PHL
25h 30m
1 stop
£538American Airlines
Tue, 22 Sep - Fri, 2 Oct
British Airways Logo
18:45 - 14:25
PHL
-
INV
14h 40m
1 stop
British Airways Logo
07:50 - 16:40
INV
-
PHL
13h 50m
1 stop
£539British Airways
Sun, 16 Aug - Mon, 24 Aug
British Airways Logo
18:45 - 10:15
PHL
-
INV
10h 30m
1 stop
British Airways Logo
15:45 - 16:10
INV
-
PHL
29h 25m
2 stops
£541British Airways
Mon, 17 Aug - Mon, 24 Aug
British Airways Logo
15:20 - 10:20
PHL
-
INV
14h 00m
2 stops
British Airways Logo
15:45 - 16:10
INV
-
PHL
29h 25m
2 stops
£541British Airways
Wed, 30 Sep - Wed, 7 Oct
American Airlines Logo
17:30 - 14:55
PHL
-
INV
16h 25m
2 stops
American Airlines Logo
07:35 - 21:10
INV
-
PHL
18h 35m
2 stops
£549American Airlines
Mon, 27 Jul - Tue, 11 Aug
Aer Lingus Logo
20:25 - 11:00
PHL
-
MAN
9h 35m
1 stop
Aer Lingus Logo
11:40 - 18:55
MAN
-
PHL
12h 15m
1 stop
£562Aer Lingus
Mon, 3 Aug - Wed, 12 Aug
JetBlue Logo
09:20 - 10:00
PHL
-
EDI
19h 40m
1 stop
JetBlue Logo
11:30 - 20:00
EDI
-
PHL
13h 30m
1 stop
£587JetBlue
Wed, 29 Jul - Wed, 5 Aug
JetBlue Logo
09:20 - 10:00
PHL
-
EDI
19h 40m
1 stop
JetBlue Logo
11:30 - 20:00
EDI
-
PHL
13h 30m
1 stop
£592JetBlue
Thu, 13 Aug - Mon, 17 Aug
Aer Lingus Logo
20:25 - 15:00
PHL
-
LHR
13h 35m
1 stop
Aer Lingus Logo
13:25 - 18:55
LHR
-
PHL
10h 30m
1 stop
£655Aer Lingus
Wed, 7 Oct - Thu, 15 Oct
Iberia Logo
20:30 - 15:15
PHL
-
LCY
13h 45m
1 stop
Iberia Logo
09:50 - 17:50
LCY
-
PHL
13h 00m
1 stop
£726Iberia
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 London, at £248 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 5 days was £248.

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 £640 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 £668.

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 £675 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 £34 (return) on average. On the other hand, the most expensive months are April and November, when the average cost of return tickets is £1,589 and £1,041 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 7 weeks before departure.

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

Low seasonJanuary
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly and prices are also 12% lower on average.

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.

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 1602 reviews
6.7Food
8.1Crew
7.0Entertainment
7.2Comfort
7.4Boarding
Airline reviews

We were an hour and a half late, which caused my rental car company to cancel my reservation. We had no car, had to take a taxi to our hotel, and then a taxi back to get a new car the next day. Sometimes lack of on-time performance can end up costing the passenger a lot of money, none of which is covered by the airline that operated the late flight.

6.0 GoodThomas, Jun 2026
IND - DUB
Read more Aer Lingus reviews

We were an hour and a half late, which caused my rental car company to cancel my reservation. We had no car, had to take a taxi to our hotel, and then a taxi back to get a new car the next day. Sometimes lack of on-time performance can end up costing the passenger a lot of money, none of which is covered by the airline that operated the late flight.

Overall good experience. But seats were small and uncomfortable for the price. Good entertainment, staff friendly and attentive.

Smooth quiet flight take off and landing both excellent. Food was mediocre. Boarding at gate was disorganized and unacceptable.

Very good trip. Nice clean aircraft. Helpful and friendly crew.

Crew members Grainne and Karen were extremely rude and unprofessional

I am very disappointed in that KAYAK sold me this flight as a business class it was not a business class. It was a regular economy class ticket. This was not Art Linus mistake. It was kayaks.

Crew was friendly and seats were comfortable. The connection however there were no free snacks or drinks.

Our flight from Dublin to Coruna did not exist any more. Apparently it was cancelled in February and I was not advised, nor was I offered any flights for rebooking. Happily Aer Lingus found another flight to another city in Spain that was 500 miles from Coruna; I had to pay for a hotel overnight and a revise my rental car that incurred additional costs, and I did not get to Coruna for another 24 hours. I was not at all impressed with Kayak or Chatdeal or Hertz.

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.

The check in agents in PHL and gate agents had to have been the rudest women that I have ever encountered; the agent weighing the bags at check in screamed continuously at all of the guests as did the woman at the gate.I have Executive Platinum status with AA and fly a lot with AA but these ladies were the absolute worst I had the displeasure to encounter!

Delayed delayed. Poor professionalism. Our seats changed and we pay for them

Fine. Nothing to write home about. The plane left on time, and arrived on time.

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.

Nice plane, clean, wifi available and movies. All the flight attendants were courteous.

The gate attendant in Boston had a high raspy voice and spoke much too fast to be understood. Not pleasant.

The flight was delayed for more than 3 hours the flight attendant was so angry, it was my first flight with JetBlue but i don’t think I flight with them again.

First the flt was delayed over 2 hrs bc of plane mechanics that should have been handled better! No text or email was sent so only found out at the airport so there we sat for 5 hours! THATS RIDICULOUS! The gate area was filthy! No agents showed up till hr before so no additional info was given-waited online for 15 mins while the gate agent chatted and got together then given last seat in back of plane!! No priority for senior or anything-took attendants over 2hrs to serve drinks and snack-WHY are they not served together? By time snack came needed another drink! Worst service in my life!

Since we started at syr the service, crews, and flights were just excellent

All the TV screens in my rows was non functional . The map shown for an international route was antiqued..

It was fine for what it was. It’s not luxury travel but it was efficient, for the most part. Having my carry-on transferred into luggage however, was unwelcome.

We had better-than-average leg room and I loved the access to shows and movies. During boarding, we could not hear the agent even though we were close to the boarding door, which was kind of scary when we realized that half of the passengers had already boarded. Also, the entertainment was awesome, but I could not hear the movie as well as I would have liked, because my headphones were crappy. It would have been better if I could connect my own ear buds via Bluetooth or if JetBlue provided headphones.

On time, friendly attendants, quick wheelchair assistance and help checking in bags. Also appreciated change in seats, more forward to make it easier for my 97 year old mother to board and exit the plane. Thank you, JetBlue!

Flight did not have onboard charging and TV screen flickering.

Couldn’t get boarding passes online, delayed an hour, and smallest amount of space on board I’ve ever encountered for such a long flight.

Horrible seat at the back. Crew was very kind. Packed plane. Wordy pilot bragging about Iberia being punctual when many of us came from Alicante flight that was delayed an hour and many lost connection and we lost our luggage. Still waiting for it

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.

Boarding process was chaotic. Confusion over Boarding gates: gate 55 or gate 56 ???. Unnecessary standing in long lines to board. Better to call out Boarding groups one at a time and everyone else to sit. Airline only has 2 Boarding groups 1-3 and 4-9. That causes over crowding and chaos

Lady next to me was coughing profusely the entire flight, other lady moved seats because of it, 8 hours of that during an overnight flight is a bit much.

The flight was ok. The seats are so small. The free wifi for members was not an option on this flight. The one flight attendant, older woman with straight white/grey hair, was very rude. The gentleman next to me asked about the wifi since he was a member as well. He stated, accurately, that the option to enter the idea number was not available. Her response was, "I don't know what to tell you" and walked away from him. The rest of the staff was wonderful. I asked another flight attendant about the wifi, she said the free wifi was not enabled on that flight (true or not- at least she was friendly). It was also pretty dirty. When I opened the tray table it had mushed crumbs and there was a dirty used pair of ear buds in my seat pocket. Lastly the air vent above my head was working but stuck so I was unable to move it to face me when it got warm. I fly American often but this really was not a great flight.

3.5 hr delay leaving Pittsburgh, notifications for which were incomplete and untimely. Connecting flight was automatically switched to one requiring more than a 30 hour layover! After waiting in a long queue, customer service reduced layover to 11 hours and also set up an earlier standby. The standby had empty seats, but the gate agent couldn't change our tickets! On top of all that my luggage was lost and has yet to even be located, much less returned 5 (FIVE!) days later. Too bad there's no rating below poor.

Canceled flight late London to Florence. Help at airport very poor. Treated poorly. Had to sleep in the airport. Lost bags- still do not have them. Horrible. I should be reimbursed!

The seats are extra cramped if you are taller than 5’8! Spring for the extra legroom seats for sure if you have a long flight!

Very disappointed with British Airways. It has been over 24 hours and I still have not received my checked baggage or any proper update. Customer support has been unresponsive, making the situation even more frustrating. Poor baggage handling and lack of communication seriously impacted my travel experience.

Flight was good but temp in the cabin was cold.

I like American Airlines and their safety record. They provide quality service and a feel safe enough to prefer American Airlines over other carriers even if I have to pay a little more.

Cancelled flight and re booked seats were a downgrade. British Airways said the upgrade was t available but when I checked it was but then they wouldn’t make it right

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

Information on your arrival and departure airports