$176 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 10/8. 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.
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1 adult, Economy

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Cheap Flights from Philadelphia to the United Kingdom

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London1 stop$491
Edinburgh
Edinburgh1 stop$549
Manchester
Manchester1 stop$635
Birmingham
Birmingham1 stop$683
Belfast
Belfast2 stops$655
Inverness
Inverness2 stops$527
Bristol
Bristol3 stops$818
Aberdeen
Aberdeen2 stops$639
Liverpool
Liverpool2 stops$830
Leeds
Leeds1 stop$629
Cardiff
Cardiff2 stops$1,351
Newquay
Newquay2 stops$891
Kirkwall
Kirkwall2 stops$1,524
London
London1 stop$491
Edinburgh
Edinburgh1 stop$549
Manchester
Manchester1 stop$635
Birmingham
Birmingham1 stop$683
Belfast
Belfast2 stops$655
Inverness
Inverness2 stops$527
Bristol
Bristol3 stops$818
Aberdeen
Aberdeen2 stops$639
Liverpool
Liverpool2 stops$830
Leeds
Leeds1 stop$629
Cardiff
Cardiff2 stops$1,351
Newquay
Newquay2 stops$891
Kirkwall
Kirkwall2 stops$1,524

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 round-trip 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 round-trip flight deals from Philadelphia to the United Kingdom

Sat, Oct 4 - Thu, Oct 16
Multiple Airlines Logo
4:50 pm - 6:35 amPHL-LHR
32h 45m1 stop
Multiple Airlines Logo
6:50 am - 2:38 pmLHR-PHL
12h 48m2 stops
$491Multiple Airlines
Find Deal
Tue, Nov 11 - Tue, Nov 18
Aer Lingus Logo
5:30 pm - 8:05 amPHL-LHR
9h 35m1 stop
Aer Lingus Logo
8:50 am - 4:00 pmLHR-PHL
12h 10m1 stop
$492Aer Lingus
Find Deal
Mon, Sep 29 - Thu, Oct 9
American Airlines Logo
7:50 pm - 8:05 amPHL-LHR
7h 15mnonstop
American Airlines Logo
8:55 am - 4:50 pmLHR-PHL
12h 55m1 stop
$494American Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 21
American Airlines Logo
8:35 am - 6:35 amPHL-LGW
17h 00m1 stop
American Airlines Logo
12:20 pm - 11:16 pmLGW-PHL
15h 56m2 stops
$494American Airlines
Find Deal
Wed, Oct 15 - Wed, Oct 22
British Airways Logo
6:30 pm - 6:40 amPHL-LHR
7h 10mnonstop
British Airways Logo
1:30 pm - 4:25 pmLHR-PHL
7h 55mnonstop
$512British Airways
Find Deal
Tue, Nov 11 - Tue, Nov 18
Finnair Logo
7:45 pm - 7:50 amPHL-LHR
7h 05mnonstop
Finnair Logo
10:15 am - 1:25 pmLHR-PHL
8h 10mnonstop
$519Finnair
Find Deal
Sun, Nov 2 - Tue, Nov 11
British Airways Logo
11:50 am - 6:30 amPHL-LHR
13h 40m1 stop
British Airways Logo
1:10 pm - 4:15 pmLHR-PHL
8h 05mnonstop
$539British Airways
Find Deal
Wed, Jan 14 - Wed, Jan 21
Iberia Logo
6:35 pm - 2:05 pmPHL-LCY
14h 30m2 stops
Iberia Logo
7:50 am - 3:35 pmLCY-PHL
12h 45m1 stop
$539Iberia
Find Deal
Wed, Dec 10 - Sun, Dec 14
Finnair Logo
6:35 pm - 9:30 amPHL-EDI
9h 55m1 stop
Finnair Logo
6:20 am - 4:15 pmEDI-PHL
14h 55m1 stop
$618Finnair
Find Deal
Fri, Feb 13 - Wed, Feb 18
Iberia Logo
4:40 pm - 8:50 amPHL-LCY
11h 10m1 stop
Iberia Logo
7:50 am - 3:35 pmLCY-PHL
12h 45m1 stop
$727Iberia
Find Deal
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 $512 round-trip. 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 $512.

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

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $794, prices are generally cheapest when you fly direct.

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 September, when tickets cost $656 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $1,133 and $951 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.

For Philadelphia to United Kingdom, Wednesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from United Kingdom back to Philadelphia, the best deals are generally found on Tuesday, with Friday being the most expensive.

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 the flight from Philadelphia to the United Kingdom, you should book around 2 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$176
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Philadelphia to London Gatwick Airport

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

Insights shared by verified travelers who flew the route from Philadelphia to the United Kingdom 
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 - 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 travelers 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 round-trip 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.

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

    The cheapest time of day to fly to the United Kingdom is generally in the afternoon, when round-trip flights cost $764 on average. Morning departures are around 8% cheaper than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally in the evening, which is peak travel time and where the average cost of a ticket is $886.

Top tips for finding cheap flights to the United Kingdom

  • Looking for a cheap flight? 25% of our users found tickets from Philadelphia to the following destinations at these prices or less: London $488 one-way - $615 round-trip

Reviews of the top 5 airlines serving 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.
7.6
FinnairOverall score based on 1323 reviews
7.5Comfort
7.6Boarding
6.9Entertainment
6.7Food
8.1Crew
Airline reviews

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

10.0 ExcellentSarah, Aug 2025CPH - HEL
Read more Finnair reviews

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

We had an excellent trip with Finnair. This was our first time and we’re very pleased. The only issue was with the boarding - it was a little bit confusing and needs a little bit of streamlining.

Flight delayed over an hour. They said they would hold our connection but then did not.

Major problems checking in at Alaska counter. They could not find our booking code because it came from Finnair.

Do not use KAYAK or Finair for future travel. Unless you purchase the tickets directly from the airline, you were going to have a difficult time checking in. Kayak canceled my flights twice and ended up causing great difficulty in me getting back from Europe because they double sold my tickets between American Airlines and Finair. The event caused significant delays and led to me having to rebook my flights.

The staff were all particularly great. The plane was clean and fresh. The bassinet worked great. It was all very nice.

Boarding uncomfortable. Stewardess said I would have to check my carry on as there was no room in the overhead bins. Another passenger helped me find a spot.

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

The flight was canceled 3 hours after original take off time

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!!!

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.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

We started with trouble checking in 24 hours early. Then my husband did not get his TSA precheck. Finally flight delayed due to no crew. I know things happen

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

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

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

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

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

The flight from Cincinnati to Philadelphia was satisfactory and uneventful.

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

Coming from the EU to the USA, Aer Lingus is a very good choice. You clear U.S. border control while still at the departure airport, so when you land in the States, you don’t need to go through the entry process again — very efficient and fast. In terms of comfort, Aer Lingus is better than the usual EU carriers like KLM, Lufthansa, or Air France, and also better than United. There’s more legroom, and the crew is helpful and kind. The food is average but slightly better than most airlines. Overall, the crew is definitely better than on American Airlines, though not quite at the level of Virgin.

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!

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

Easy and organized getting in and out of the flight

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

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

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

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

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.

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

flight was delayed from BWI to London - missed my connecting flight & then connecting flight (also British Air) was delayed - food is awful, TV & movie selection is great

Three major things that led to my low rating, 1. Internet wasn't available for the whole time, and 2. TV became available way into flight, after numerous system reboots, and 3. Food is not good at all.

Super tight economy class. My knees were hitting the back of seat in front of me (I'm only 5'6"). My small backpack (sized according to their required dimensions) would not fit under the seat in front of me because there is a box (is that the life jacket?) in the way. Over all, extremely uncomfortable. I forgive the tasteless food, but the tight seating was torture

Didn’t fly with them as someone had cancelled my flight

Online check-in 24 hours in advance something seems not so easy to check in to pick seats and to print a boarding pass

I like the crew, very welcoming. Food can be better. The seat arms don’t go up so. I could use the empty seat next to mine to relax better. 3hrs delay 😠

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

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

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