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Cheap flights from London to Philadelphia from £358

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Philadelphia departing on 19/11. 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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Cheap return flights

United Airlines Logo
06:35 - 21:21LHR-PHL
18h 46m2 stops
United Airlines Logo
10:05 - 06:40PHL-LHR
15h 35m2 stops
£436United Airlines
Find Deal
sex, 31 out - sex, 7 nov
Multiple Airlines Logo
09:50 - 08:47LGW-PHL
27h 57m2 stops
Multiple Airlines Logo
10:46 - 10:05PHL-LGW
18h 19m1 stop
£437Multiple Airlines
Find Deal
qua, 19 nov - sáb, 6 dez
British Airways Logo
06:30 - 13:55LHR-PHL
12h 25m1 stop
British Airways Logo
18:35 - 06:35PHL-LHR
7h 00mdirect
£440British Airways
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seg, 17 nov - ter, 2 dez
Aer Lingus Logo
12:00 - 19:00LHR-PHL
12h 00m1 stop
Aer Lingus Logo
20:30 - 11:10PHL-LHR
9h 40m1 stop
£442Aer Lingus
Find Deal
qua, 15 out - qua, 22 out
British Airways Logo
12:30 - 15:30LHR-PHL
8h 00mdirect
British Airways Logo
18:08 - 09:35PHL-LHR
10h 27m1 stop
£446British Airways
Find Deal
seg, 29 set - seg, 6 out
Finnair Logo
10:30 - 11:45LHR-PHL
30h 15m1 stop
Finnair Logo
18:00 - 12:30PHL-LHR
13h 30m1 stop
£447Finnair
Find Deal
dom, 12 out - qua, 22 out
Air Canada Logo
14:05 - 21:38LHR-PHL
12h 33m1 stop
Air Canada Logo
09:20 - 06:30PHL-LHR
16h 10m1 stop
£448Air Canada
Find Deal
sex, 3 out - sex, 17 out
Finnair Logo
12:55 - 11:45LHR-PHL
27h 50m1 stop
Finnair Logo
16:00 - 12:15PHL-LHR
15h 15m2 stops
£449Finnair
Find Deal
dom, 12 out - qua, 22 out
Aer Lingus Logo
09:50 - 17:00LHR-PHL
11h 10m1 stop
Aer Lingus Logo
17:30 - 08:05PHL-LHR
9h 35m1 stop
£453Aer Lingus
Find Deal
sex, 31 out - qui, 6 nov
Air Canada Logo
13:25 - 15:47LHR-PHL
30h 22m1 stop
Air Canada Logo
15:30 - 07:10PHL-LHR
10h 40m1 stop
£455Air Canada
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sáb, 1 nov - sáb, 6 dez

JetBlue flights from London to Philadelphia

Our best JetBlue deals on London to Philadelphia flight tickets
JetBlue
24 Nov
LHR09:20London Heathrow
17h 37m
1 stop
PHL21:57Philadelphia
6 Dec
PHL16:32Philadelphia
9h 23m
1 stop
LHR06:55London Heathrow
£441
Find similar
JetBlue
24 Sept
LGW12:10London Gatwick
14h 40m
1 stop
PHL21:50Philadelphia
3 Oct
PHL18:10Philadelphia
10h 25m
1 stop
LGW09:35London Gatwick
£499
Find similar
JetBlue
18 Sept
LGW12:10London Gatwick
26h 12m
1 stop
PHL09:22Philadelphia
25 Sept
PHL07:00Philadelphia
21h 35m
1 stop
LGW09:35London Gatwick
£628
Find similar

Lufthansa flights from London to Philadelphia

Our best Lufthansa deals on London to Philadelphia flight tickets
Lufthansa
25 Sept
LHR09:30London Heathrow
11h 30m
1 stop
PHL16:00Philadelphia
9 Oct
PHL17:35Philadelphia
12h 05m
1 stop
LHR10:40London Heathrow
£442
Find similar
Lufthansa
16 Oct
LHR09:30London Heathrow
11h 30m
1 stop
PHL16:00Philadelphia
23 Oct
PHL18:10Philadelphia
10h 30m
1 stop
LHR09:40London Heathrow
£443
Find similar
Lufthansa
15 Oct
LHR09:30London Heathrow
11h 30m
1 stop
PHL16:00Philadelphia
31 Oct
PHL16:35Philadelphia
14h 45m
1 stop
LHR11:20London Heathrow
£452
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London to Philadelphia 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 17 setembro 2025.
Use the filters below to find and compare flights from London to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

sex 31/10

06:35-21:21

2 stops18h 46m

Philadelphia

sex 7/11

10:05-06:40

2 stops15h 35m

£436

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

qua 19/11

09:50-08:47

2 stops27h 57m

Philadelphia

sáb 6/12

10:46-10:05

1 stop18h 19m

£437

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

seg 17/11

06:30-13:55

1 stop12h 25m

Philadelphia

ter 2/12

18:35-06:35

Nonstop7h 00m

£440

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

qua 15/10

12:00-19:00

1 stop12h 00m

Philadelphia

qua 22/10

20:30-11:10

1 stop9h 40m

£442

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

seg 29/9

12:30-15:30

Nonstop8h 00m

Philadelphia

seg 6/10

18:08-09:35

1 stop10h 27m

£446

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

dom 12/10

10:30-11:45

1 stop30h 15m

Philadelphia

qua 22/10

18:00-12:30

1 stop13h 30m

£447

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

sex 3/10

14:05-21:38

1 stop12h 33m

Philadelphia

sex 17/10

09:20-06:30

1 stop16h 10m

£448

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

dom 12/10

12:55-11:45

1 stop27h 50m

Philadelphia

qua 22/10

16:00-12:15

2 stops15h 15m

£449

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

sex 31/10

09:50-17:00

1 stop11h 10m

Philadelphia

qui 6/11

17:30-08:05

1 stop9h 35m

£453

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

sáb 1/11

13:25-15:47

1 stop30h 22m

Philadelphia

sáb 6/12

15:30-07:10

1 stop10h 40m

£455

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Philadelphia from

How to get the cheapest flight ticket from London to Philadelphia

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 Philadelphia?

If you aren’t able to travel during the month of February, then book flights to Philadelphia from London during September instead. Flights to Philadelphia in September, while not as cheap as those in February, still average around £489.

What is the cheapest day to depart on your flight to Philadelphia?

Our data shows that Tuesday is the least expensive day to fly to Philadelphia. Tickets to fly out on this day can be as low as £594. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £656.

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

The cheapest time of day to fly to Philadelphia is in the afternoon when flights can be purchased for as low as £493. At midday is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £624 per ticket.

What is the cheapest London to Philadelphia flight route?

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

How far in advance should I book a flight to Philadelphia?

You are more likely to see cheaper flights to Philadelphia from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around £554 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from London for as low as £510 on momondo.

What cabin class options are available on London to Philadelphia flights?

There are 3 cabin classes available to choose from on London to Philadelphia 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 London to Philadelphia flights?

You could potentially save up to 14% on your flight if you consider stops on a London to Philadelphia flight.

How have London to Philadelphia flight prices changed over time?

As of September 2025, prices for London to Philadelphia flights are approximately 1% more expensive when compared to flights at the same time last year.

When to book flights from London to Philadelphia

Are you open to changing your travel dates? Check out the ideal times to fly from London to Philadelphia according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to Philadelphia (LON to PHL) flight deals and tips

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

Best price found

£538

Fastest flight time

7h 55m

Direct flights

Every day

Airports in Philadelphia

1 airport
The best one-way flight to Philadelphia from London in the past 72 hours is £538. The best return flight deal from London to Philadelphia found on momondo in the last 72 hours is £497.
The fastest flight from London to Philadelphia takes 7h 55m
Direct flights go from London to Philadelphia every day.
There is 1 airport near Philadelphia: Philadelphia (PHL)
Search flight deals

  • How far is London to Philadelphia by plane?

    London and Philadelphia are 3538.9 mi apart from one another. 8h 00m is a normal flight duration for this route.

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

    Prices for flights from London to Philadelphia Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Philadelphia Airport.

  • What documentation or ID do you need to fly to Philadelphia Airport?

    The travel and health documents you'll need for your trip to Philadelphia Airport 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 Philadelphia Airport. 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 London to Philadelphia?

  • What is the most popular airline from London to Philadelphia?

Best airlines flying from London to Philadelphia

Compare and see reviews for airlines that fly from London to Philadelphia with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom £298Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
IcelandairPriceFrom £330Free CancellationRating
7.0
544 reviews
Search Icelandair flights
Air CanadaPriceFrom £332Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
JetBluePriceFrom £352Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
LufthansaPriceFrom £405Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
British AirwaysPriceFrom £429Free CancellationRating
6.7
7,363 reviews
Search British Airways flights
FinnairPriceFrom £435Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
American AirlinesPriceFrom £439Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Aer LingusPriceFrom £445Free CancellationRating
7.2
1,274 reviews
Search Aer Lingus flights
IberiaPriceFrom £464Free CancellationRating
7.0
2,924 reviews
Search Iberia flights

  • Finnair Flights From London to Philadelphia

    Finnair flies from London to Philadelphia around 20 times per week, with 1,324 momondo users rating the airline 7.6/10. The cheapest Finnair deal from London to Philadelphia in the last 72 hours was £594 (round-trip), much lower than the average airfare cost of £758 for Finnair flights on this route.

  • American Airlines Flights From London to Philadelphia

    Another popular option for London to Philadelphia flights is American Airlines (7.2/10, 10,000 ratings). American Airlines flies from London to Philadelphia around 20 times per week, with deals starting from £599 round-trip and rising to an average price of around £792.

Travelling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Dover
Newark
Reading
Vineland
King of Prussia
Cape May
Essington
Rehoboth Beach
Cherry Hill
Dewey Beach

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Philadelphia . Millions of users trust and use momondo every year so you are in good hands.

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

Flights from London to Philadelphia 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 London to Philadelphia?

momondo provides multiple filters to help you find the best flight to Philadelphia from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Philadelphia, momondo offers a useful price alert feature which will track prices for flights to Philadelphia from London and alert you when they change.

An easier way to manage your Philadelphia trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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