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Cheap flights from Philadelphia to the United Kingdom from £191

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to the United Kingdom departing on 18/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Philadelphia to the United Kingdom

Cheap return flights

British Airways Logo
15:50 - 10:10PHL-LGW
13h 20m1 stop
British Airways Logo
12:30 - 09:25LGW-PHL
25h 55m2 stops
£362British Airways
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Mon, 6 Oct - Thu, 6 Nov
American Airlines Logo
14:00 - 07:50PHL-LHR
12h 50m1 stop
American Airlines Logo
07:50 - 14:45LHR-PHL
10h 55m1 stop
£363American Airlines
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Wed, 22 Oct - Fri, 31 Oct
Logo
14:02 - 10:10PHL-LGW
15h 08m1 stop
Logo
11:20 - 21:56LGW-PHL
15h 36m1 stop
£365
Find Deal
Mon, 6 Oct - Thu, 6 Nov
Aer Lingus Logo
20:30 - 12:40PHL-LHR
11h 10m1 stop
Aer Lingus Logo
13:25 - 19:00LHR-PHL
10h 35m1 stop
£371Aer Lingus
Find Deal
Wed, 3 Sep - Wed, 10 Sep
Iberia Logo
19:45 - 07:50PHL-LHR
7h 05mdirect
Iberia Logo
15:45 - 15:35LHR-PHL
28h 50m1 stop
£376Iberia
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Sun, 15 Feb - Thu, 26 Feb
Iberia Logo
18:30 - 06:40PHL-LHR
7h 10mdirect
Iberia Logo
17:25 - 15:35LHR-PHL
27h 10m1 stop
£377Iberia
Find Deal
Sun, 19 Oct - Tue, 25 Nov
Aer Lingus Logo
18:30 - 08:05PHL-LHR
9h 35m1 stop
Aer Lingus Logo
07:50 - 16:00LHR-PHL
13h 10m1 stop
£388Aer Lingus
Find Deal
Mon, 27 Oct - Sun, 9 Nov
Logo
21:10 - 12:40PHL-LCY
10h 30m1 stop
Logo
06:50 - 13:55LCY-PHL
12h 05m1 stop
£391
Find Deal
Wed, 14 Jan - Wed, 21 Jan
JetBlue Logo
15:10 - 09:35PHL-LGW
13h 25m1 stop
JetBlue Logo
12:10 - 21:50LGW-PHL
14h 40m1 stop
£446JetBlue
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Wed, 3 Sep - Tue, 9 Sep
JetBlue Logo
18:10 - 09:35PHL-LGW
10h 25m1 stop
JetBlue Logo
12:10 - 21:50LGW-PHL
14h 40m1 stop
£468JetBlue
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Mon, 15 Sep - Tue, 23 Sep

American Airlines flights from Philadelphia to United Kingdom

Our best American Airlines deals on Philadelphia to United Kingdom flight tickets
American Airlines
22 Oct
PHL14:00Philadelphia
12h 50m
1 stop
LHR07:50London Heathrow
31 Oct
LHR07:50London Heathrow
10h 55m
1 stop
PHL14:45Philadelphia
£363
Find similar
American Airlines
11 Nov
PHL16:05Philadelphia
9h 25m
1 stop
LHR06:30London Heathrow
18 Nov
LHR07:50London Heathrow
11h 05m
1 stop
PHL13:55Philadelphia
£364
Find similar
American Airlines
29 Oct
PHL14:00Philadelphia
12h 30m
1 stop
LHR06:30London Heathrow
5 Nov
LHR07:50London Heathrow
11h 05m
1 stop
PHL13:55Philadelphia
£365
Find similar

Aer Lingus flights from Philadelphia to United Kingdom

Our best Aer Lingus deals on Philadelphia to United Kingdom flight tickets
Aer Lingus
3 Sept
PHL20:30Philadelphia
11h 10m
1 stop
LHR12:40London Heathrow
10 Sept
LHR13:25London Heathrow
10h 35m
1 stop
PHL19:00Philadelphia
£371
Find similar
Aer Lingus
27 Oct
PHL18:30Philadelphia
9h 35m
1 stop
LHR08:05London Heathrow
9 Nov
LHR07:50London Heathrow
13h 10m
1 stop
PHL16:00Philadelphia
£388
Find similar
Aer Lingus
3 Sept
PHL20:30Philadelphia
11h 10m
1 stop
LHR12:40London Heathrow
6 Sept
LHR08:50London Heathrow
15h 10m
1 stop
PHL19:00Philadelphia
£391
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Philadelphia to United Kingdom that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 22 August 2025.
Use the filters below to find and compare flights from Philadelphia to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Mon 6/10

15:50-10:10

1 stop13h 20m

London Gatwick

Thu 6/11

12:30-09:25

2 stops25h 55m

£362

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 22/10

14:00-07:50

1 stop12h 50m

London Heathrow

Fri 31/10

07:50-14:45

1 stop10h 55m

£363

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Mon 6/10

14:02-10:10

1 stop15h 08m

London Gatwick

Thu 6/11

11:20-21:56

1 stop15h 36m

£365

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 3/9

20:30-12:40

1 stop11h 10m

London Heathrow

Wed 10/9

13:25-19:00

1 stop10h 35m

£371

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 15/2

19:45-07:50

Nonstop7h 05m

London Heathrow

Thu 26/2

15:45-15:35

1 stop28h 50m

£376

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 19/10

18:30-06:40

Nonstop7h 10m

London Heathrow

Tue 25/11

17:25-15:35

1 stop27h 10m

£377

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 27/10

18:30-08:05

1 stop9h 35m

London Heathrow

Sun 9/11

07:50-16:00

1 stop13h 10m

£388

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Wed 14/1

21:10-12:40

1 stop10h 30m

London City

Wed 21/1

06:50-13:55

1 stop12h 05m

£391

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Wed 3/9

15:10-09:35

1 stop13h 25m

London Gatwick

Tue 9/9

12:10-21:50

1 stop14h 40m

£446

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Mon 15/9

18:10-09:35

1 stop10h 25m

London Gatwick

Tue 23/9

12:10-21:50

1 stop14h 40m

£468

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to the United Kingdom from

How to get the cheapest flight ticket from Philadelphia to United Kingdom

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to United Kingdom?

The cheapest month to fly to United Kingdom from Philadelphia is in February. Flight prices, which tend to average around £493, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of February, then departing from Philadelphia during the month September is also very affordable. Most momondo users find prices during this month for around £507.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from Philadelphia to United Kingdom is on a Tuesday. Travellers who choose to depart for United Kingdom on a Tuesday will often find tickets for as low as £500. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to United Kingdom for around £746.

What is the cheapest time of day to depart on your flight to United Kingdom?

The cheapest time of day to fly to United Kingdom is in the morning when flights can be purchased for as low as £495. Try not to purchase tickets at midday because they tend to be around £735. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Philadelphia to United Kingdom flight route?

Fly from Philadelphia to London Heathrow for the best Philadelphia - United Kingdom flight prices

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

You are more likely to see cheaper flights to United Kingdom from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around £614 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Philadelphia for as low as £537 on momondo.

What cabin class options are available on Philadelphia to United Kingdom flights?

There are 3 cabin classes available to choose from on Philadelphia to United Kingdom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Philadelphia to United Kingdom flights?

You could potentially save up to 26% on your flight if you consider stops on a Philadelphia to United Kingdom flight.

Cheap Philadelphia to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to United Kingdom

Best price found

£302

Fastest flight time

6h 45m

Direct flights

Every day

Airports in United Kingdom

2 airports
The best one-way flight to United Kingdom from Philadelphia in the past 72 hours is £302. The best return flight deal from Philadelphia to United Kingdom found on momondo in the last 72 hours is £384.
The fastest flight from Philadelphia to United Kingdom takes 6h 45m
Direct flights go from Philadelphia to United Kingdom every day.
There are 2 airports near United Kingdom: London Heathrow (LHR), Edinburgh Turnhouse (EDI)
Search flight deals

  • When did momondo last update prices for flights from Philadelphia Airport to United Kingdom?

    Prices for flights from Philadelphia Airport to United Kingdom are updated daily.

  • How many operators does momondo search for flights from Philadelphia Airport to United Kingdom?

  • How old do you have to be to fly from Philadelphia Airport to United Kingdom?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Philadelphia Airport to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The travel and health documents you'll need for your trip to United Kingdom may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at United Kingdom. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Philadelphia to United Kingdom?

Best airlines flying from Philadelphia to United Kingdom

Compare and see reviews for airlines that fly from Philadelphia to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom £426Free CancellationRating
7.2
2,916 reviews
Search JetBlue flights
British AirwaysPriceFrom £443Free CancellationRating
6.7
7,292 reviews
Search British Airways flights
IberiaPriceFrom £461Free CancellationRating
7.0
2,884 reviews
Search Iberia flights
Aer LingusPriceFrom £492Free CancellationRating
7.1
1,228 reviews
Search Aer Lingus flights
American AirlinesPriceFrom £508Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to United Kingdom?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to United Kingdom from Philadelphia.

Can I find flights from Philadelphia to United Kingdom with flexible booking policies on momondo?

Flights from Philadelphia to United Kingdom with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Philadelphia to United Kingdom?

Once all potential Philadelphia to United Kingdom flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Philadelphia to United Kingdom right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to United Kingdom from Philadelphia. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Find better results for your trip to the United Kingdom

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Popular flights according to clicks in the last 7 days on momondo
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