£334 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 19/7. 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

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Best United Kingdom Flight Deals from Philadelphia

Cheapest return prices found by our users on KAYAK in the last 72 hours
London
London1 stop£334
Manchester
Manchester2 stops£480
Edinburgh
Edinburgh1 stop£439
Birmingham
Birmingham2 stops£409
Bristol
Bristol2 stops£670
Aberdeen
Aberdeen1 stop£536
Liverpool
Liverpool1 stop£735
Leeds
Leeds2 stops£573
Inverness
Inverness1 stop£461
London
London1 stop£334
Manchester
Manchester2 stops£480
Edinburgh
Edinburgh1 stop£439
Birmingham
Birmingham2 stops£409
Bristol
Bristol2 stops£670
Aberdeen
Aberdeen1 stop£536
Liverpool
Liverpool1 stop£735
Leeds
Leeds2 stops£573
Inverness
Inverness1 stop£461

Cheap Flights from Philadelphia to the United Kingdom

 
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

Wed, 24 Sep - Mon, 29 Sep
 Logo
06:45 - 07:55PHL-LGW
20h 10m1 stop
 Logo
10:00 - 13:29LGW-PHL
32h 29m1 stop
Fri, 26 Sep - Mon, 29 Sep
 Logo
06:45 - 07:00PHL-LGW
19h 15m1 stop
 Logo
10:00 - 13:29LGW-PHL
32h 29m1 stop
Wed, 3 Sep - Tue, 30 Sep
JetBlue Logo
18:40 - 09:35PHL-LGW
9h 55m1 stop
JetBlue Logo
12:10 - 21:24LGW-PHL
14h 14m1 stop
£411JetBlue
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Tue, 26 Aug - Wed, 3 Sep
JetBlue Logo
18:35 - 09:35PHL-LGW
10h 00m1 stop
JetBlue Logo
12:10 - 21:24LGW-PHL
14h 14m1 stop
£412JetBlue
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Wed, 13 Aug - Thu, 21 Aug
British Airways Logo
19:40 - 07:55PHL-LHR
7h 15mdirect
British Airways Logo
06:15 - 14:05LHR-PHL
12h 50m1 stop
£442British Airways
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Wed, 13 Aug - Fri, 22 Aug
British Airways Logo
17:29 - 09:30PHL-LHR
11h 01m1 stop
British Airways Logo
07:00 - 14:05LHR-PHL
12h 05m1 stop
£445British Airways
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Wed, 13 Aug - Fri, 22 Aug
Iberia Logo
22:15 - 10:20PHL-LHR
7h 05mdirect
Iberia Logo
10:05 - 13:10LHR-PHL
8h 05mdirect
£464Iberia
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Wed, 23 Jul - Tue, 29 Jul
Iberia Logo
18:30 - 06:40PHL-LHR
7h 10mdirect
Iberia Logo
12:30 - 15:25LHR-PHL
7h 55mdirect
£491Iberia
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Thu, 30 Oct - Tue, 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
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Sun, 3 Aug - Tue, 19 Aug
Aer Lingus Logo
20:30 - 11:50PHL-BHX
10h 20m1 stop
Aer Lingus Logo
08:15 - 19:00BHX-PHL
15h 45m1 stop
£558Aer Lingus
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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?

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

The cheapest ticket to the United Kingdom from Philadelphia found in the last 72 hours was to London, at £457 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 £457.

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 1 stop stopover the cheapest option at £632 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 £489 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is £845 and £740 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, Thursday 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 the flight from Philadelphia to the United Kingdom, 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 the United Kingdom

Low seasonJanuary
High seasonSeptember
Best time to beat the crowds (4% less expensive on average)
Most popular time to fly and prices are also 15% 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 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 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.

  • 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 morning, when retur flights cost £666 on average. Morning departures are around 21% cheaper than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally in the afternoon, which is peak travel time and where the average cost of a ticket is £988.

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 £330 one-way - £548 round-trip

Top 4 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.
7.3
JetBlueOverall score based on 2925 reviews
6.7Food
7.5Boarding
7.6Comfort
7.3Entertainment
8.0Crew
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

I would definitely use a Linus again, the price was right, the service is excellent. No delays. Wish I had a direct flight from my hometown Detroit.

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.

This flight was of exactly the same high standard as the outbound leg, exactly a week earlier - except that we didn't have any food or drink because it departed at around midnight.

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

It was ok not that much because I always travel with Emirates airlines, Etihad, airlines, Qatar airlines compare to them food and comfortable was too low . Staff was good . Helpful

Seats were alarming close to the row in front of you. I didn’t do the measurements online, which I’m sure they’re available, but it seemed much tighter than other planes, but the airplane itself was well maintained and looked fairly new. My only complaint on the staff was that we’re on an international flight. Normally they give you wine with dinner and the flight attendant decided to pull some strict restrictions and wouldn’t give more than one glass of wine per person, and you could not share with your spouse, which seemed ridiculous when we have four people on the plane with us and only one person ordered wine asked for a second one and she said oh absolutely not. It’s only one per person Which on a transcontinental usually is not the case. They’re very attentive on making sure everyone is as comfortable as possible.

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 the United Kingdom

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