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Cheap flights from Philadelphia to the United Kingdom from £132

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 20/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap return flights

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Multiple Airlines Logo
17:57 - 06:00PHL-LGW
55h 03m2 stops
Multiple Airlines Logo
14:00 - 00:41LGW-PHL
15h 41m1 stop
£394Multiple Airlines
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Wed, 7 Jan - Fri, 16 Jan
Multiple Airlines Logo
20:00 - 10:00PHL-LGW
33h 00m1 stop
Multiple Airlines Logo
14:00 - 00:40LGW-PHL
15h 40m1 stop
£402Multiple Airlines
Find Deal
Wed, 18 Feb - Thu, 26 Feb
Multiple Airlines Logo
17:30 - 13:20PHL-STN
14h 50m1 stop
Multiple Airlines Logo
08:30 - 16:00STN-PHL
12h 30m1 stop
£405Multiple Airlines
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Sun, 9 Nov - Tue, 18 Nov
British Airways Logo
18:35 - 09:50PHL-GLA
10h 15m1 stop
British Airways Logo
19:15 - 16:15GLA-PHL
26h 00m1 stop
£449British Airways
Find Deal
Mon, 10 Nov - Mon, 17 Nov
JetBlue Logo
09:22 - 06:55PHL-LHR
16h 33m1 stop
JetBlue Logo
09:20 - 15:57LHR-PHL
11h 37m1 stop
£451JetBlue
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Wed, 12 Nov - Tue, 18 Nov
British Airways Logo
18:35 - 09:45PHL-MAN
10h 10m1 stop
British Airways Logo
09:50 - 16:15MAN-PHL
11h 25m1 stop
£453British Airways
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Mon, 10 Nov - Wed, 19 Nov
Aer Lingus Logo
17:30 - 08:50PHL-GLA
10h 20m1 stop
Aer Lingus Logo
08:20 - 16:00GLA-PHL
12h 40m1 stop
£484Aer Lingus
Find Deal
Sun, 7 Dec - Thu, 11 Dec
Iberia Logo
20:00 - 14:05PHL-LCY
13h 05m1 stop
Iberia Logo
07:50 - 15:35LCY-PHL
12h 45m1 stop
£491Iberia
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Tue, 20 Jan - Wed, 4 Feb
Aer Lingus Logo
17:30 - 08:50PHL-GLA
10h 20m1 stop
Aer Lingus Logo
08:20 - 16:00GLA-PHL
12h 40m1 stop
£491Aer Lingus
Find Deal
Sun, 30 Nov - Thu, 4 Dec
Iberia Logo
19:55 - 14:05PHL-LCY
13h 10m1 stop
Iberia Logo
07:50 - 15:30LCY-PHL
12h 40m1 stop
£509Iberia
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Wed, 10 Dec - Wed, 17 Dec

Air Canada flights from Philadelphia to United Kingdom

Our best Air Canada deals on Philadelphia to United Kingdom flight tickets
Air Canada
9 Nov
PHL15:30Philadelphia
24h 05m
2 stops
LHR20:35London Heathrow
18 Nov
LHR09:00London Heathrow
18h 46m
2 stops
PHL22:46Philadelphia
£419
Find similar
Air Canada
9 Nov
PHL15:30Philadelphia
10h 40m
1 stop
LHR07:10London Heathrow
18 Nov
LHR09:00London Heathrow
35h 51m
2 stops
PHL15:51Philadelphia
£425
Find similar
Air Canada
9 Nov
PHL15:30Philadelphia
24h 05m
2 stops
LHR20:35London Heathrow
18 Nov
LHR09:00London Heathrow
18h 46m
2 stops
PHL22:46Philadelphia
£427
Find similar

United Airlines flights from Philadelphia to United Kingdom

Our best United Airlines deals on Philadelphia to United Kingdom flight tickets
United Airlines
27 Oct
PHL06:00Philadelphia
21h 10m
2 stops
LHR07:10London Heathrow
4 Nov
LHR06:35London Heathrow
21h 11m
2 stops
PHL22:46Philadelphia
£462
Find similar
United Airlines
10 Dec
PHL15:30Philadelphia
10h 40m
1 stop
LHR07:10London Heathrow
25 Dec
LHR06:30London Heathrow
14h 35m
1 stop
PHL16:05Philadelphia
£463
Find similar
United Airlines
26 Oct
PHL15:30Philadelphia
11h 40m
1 stop
LHR07:10London Heathrow
4 Nov
LHR08:30London Heathrow
12h 35m
1 stop
PHL16:05Philadelphia
£464
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 15 October 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

Wed 7/1

17:57-06:00

2 stops55h 03m

London Gatwick

Fri 16/1

14:00-00:41

1 stop15h 41m

£394

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Wed 18/2

20:00-10:00

1 stop33h 00m

London Gatwick

Thu 26/2

14:00-00:40

1 stop15h 40m

£402

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Sun 9/11

17:30-13:20

1 stop14h 50m

London Stansted

Tue 18/11

08:30-16:00

1 stop12h 30m

£405

PhiladelphiaGlasgow

PHL - GLA

PHLGLA

Philadelphia

Mon 10/11

18:35-09:50

1 stop10h 15m

Glasgow Intl

Mon 17/11

19:15-16:15

1 stop26h 00m

£449

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 12/11

09:22-06:55

1 stop16h 33m

London Heathrow

Tue 18/11

09:20-15:57

1 stop11h 37m

£451

PhiladelphiaManchester

PHL - MAN

PHLMAN

Philadelphia

Mon 10/11

18:35-09:45

1 stop10h 10m

Manchester

Wed 19/11

09:50-16:15

1 stop11h 25m

£453

PhiladelphiaGlasgow

PHL - GLA

PHLGLA

Philadelphia

Sun 7/12

17:30-08:50

1 stop10h 20m

Glasgow Intl

Thu 11/12

08:20-16:00

1 stop12h 40m

£484

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Tue 20/1

20:00-14:05

1 stop13h 05m

London City

Wed 4/2

07:50-15:35

1 stop12h 45m

£491

PhiladelphiaGlasgow

PHL - GLA

PHLGLA

Philadelphia

Sun 30/11

17:30-08:50

1 stop10h 20m

Glasgow Intl

Thu 4/12

08:20-16:00

1 stop12h 40m

£491

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Wed 10/12

19:55-14:05

1 stop13h 10m

London City

Wed 17/12

07:50-15:30

1 stop12h 40m

£509

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 September. Flight prices, which tend to average around £488, 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 September, then departing from Philadelphia during the month August is also very affordable. Most momondo users find prices during this month for around £495.

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 £505. 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 £747.

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 £500. Try not to purchase tickets at midday because they tend to be around £742. 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 £615 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 £526 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 33% 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

£553

Fastest flight time

6h 40m

Direct flights

Every day

Airports in United Kingdom

2 airports
The best flight deal from Philadelphia to United Kingdom found on momondo in the last 72 hours is £553
The fastest flight from Philadelphia to United Kingdom takes 6h 40m
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
British AirwaysPriceFrom £393Free CancellationRating
6.7
7,457 reviews
Search British Airways flights
Aer LingusPriceFrom £395Free CancellationRating
7.2
1,337 reviews
Search Aer Lingus flights
IberiaPriceFrom £420Free CancellationRating
7.0
2,990 reviews
Search Iberia flights
JetBluePriceFrom £430Free CancellationRating
7.2
2,905 reviews
Search JetBlue flights
American AirlinesPriceFrom £514Free CancellationRating
7.2
11,041 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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