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Cheap flights from London to Philadelphia from £368

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 3/12. 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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Cheap return flights

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Air Canada Logo
09:00 - 14:47LHR-PHL
34h 47m2 stops
Air Canada Logo
09:20 - 20:35PHL-LHR
30h 15m2 stops
£442Air Canada
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Mon, 17 Nov - Mon, 24 Nov
JetBlue Logo
09:20 - 18:23LHR-PHL
14h 03m1 stop
JetBlue Logo
13:30 - 06:55PHL-LHR
12h 25m1 stop
£445JetBlue
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Mon, 26 Jan - Thu, 29 Jan
United Airlines Logo
11:10 - 23:03LHR-PHL
16h 53m2 stops
United Airlines Logo
09:20 - 20:35PHL-LHR
30h 15m2 stops
£457United Airlines
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Tue, 18 Nov - Tue, 25 Nov
United Airlines Logo
06:30 - 16:05LHR-PHL
14h 35m1 stop
United Airlines Logo
16:35 - 20:35PHL-LHR
23h 00m2 stops
£463United Airlines
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Tue, 2 Dec - Sun, 7 Dec
Lufthansa Logo
08:30 - 16:05LHR-PHL
12h 35m1 stop
Lufthansa Logo
17:40 - 09:45PHL-LHR
11h 05m1 stop
£494Lufthansa
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Tue, 18 Nov - Tue, 25 Nov
British Airways Logo
07:50 - 13:55LHR-PHL
11h 05m1 stop
British Airways Logo
18:35 - 06:35PHL-LHR
7h 00mdirect
£496British Airways
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Tue, 18 Nov - Tue, 25 Nov
British Airways Logo
07:50 - 13:55LHR-PHL
11h 05m1 stop
British Airways Logo
18:35 - 06:35PHL-LHR
7h 00mdirect
£497British Airways
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Wed, 19 Nov - Wed, 26 Nov
Lufthansa Logo
18:15 - 16:05LCY-PHL
26h 50m1 stop
Lufthansa Logo
17:40 - 09:20PHL-LCY
10h 40m1 stop
£576Lufthansa
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Mon, 3 Nov - Thu, 13 Nov
Iberia Logo
07:50 - 15:30LCY-PHL
12h 40m1 stop
Iberia Logo
19:55 - 14:05PHL-LCY
13h 10m1 stop
£597Iberia
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Fri, 5 Dec - Tue, 9 Dec
Iberia Logo
19:15 - 20:09LCY-PHL
53h 54m2 stops
Iberia Logo
19:55 - 14:05PHL-LCY
13h 10m1 stop
£611Iberia
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Tue, 2 Dec - Tue, 16 Dec

JetBlue flights from London to Philadelphia

Our best JetBlue deals on London to Philadelphia flight tickets
JetBlue
26 Jan
LHR09:20London Heathrow
14h 03m
1 stop
PHL18:23Philadelphia
29 Jan
PHL13:30Philadelphia
12h 25m
1 stop
LHR06:55London Heathrow
£445
Find similar
JetBlue
4 Nov
LHR09:20London Heathrow
11h 37m
1 stop
PHL15:57Philadelphia
13 Nov
PHL16:52Philadelphia
9h 03m
1 stop
LHR06:55London Heathrow
£452
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JetBlue
3 Dec
LHR09:20London Heathrow
11h 17m
1 stop
PHL15:37Philadelphia
15 Dec
PHL10:24Philadelphia
15h 31m
1 stop
LHR06:55London Heathrow
£456
Find similar

United Airlines flights from London to Philadelphia

Our best United Airlines deals on London to Philadelphia flight tickets
United Airlines
18 Nov
LHR11:10London Heathrow
16h 53m
2 stops
PHL23:03Philadelphia
25 Nov
PHL09:20Philadelphia
30h 15m
2 stops
LHR20:35London Heathrow
£457
Find similar
United Airlines
2 Dec
LHR06:30London Heathrow
14h 35m
1 stop
PHL16:05Philadelphia
7 Dec
PHL16:35Philadelphia
23h 00m
2 stops
LHR20:35London Heathrow
£463
Find similar
United Airlines
18 Nov
LHR06:30London Heathrow
14h 35m
1 stop
PHL16:05Philadelphia
25 Nov
PHL09:20Philadelphia
30h 15m
2 stops
LHR20:35London Heathrow
£474
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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 22 October 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

Mon 17/11

09:00-14:47

2 stops34h 47m

Philadelphia

Mon 24/11

09:20-20:35

2 stops30h 15m

£442

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 26/1

09:20-18:23

1 stop14h 03m

Philadelphia

Thu 29/1

13:30-06:55

1 stop12h 25m

£445

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 18/11

11:10-23:03

2 stops16h 53m

Philadelphia

Tue 25/11

09:20-20:35

2 stops30h 15m

£457

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 2/12

06:30-16:05

1 stop14h 35m

Philadelphia

Sun 7/12

16:35-20:35

2 stops23h 00m

£463

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 18/11

08:30-16:05

1 stop12h 35m

Philadelphia

Tue 25/11

17:40-09:45

1 stop11h 05m

£494

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 18/11

07:50-13:55

1 stop11h 05m

Philadelphia

Tue 25/11

18:35-06:35

Nonstop7h 00m

£496

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 19/11

07:50-13:55

1 stop11h 05m

Philadelphia

Wed 26/11

18:35-06:35

Nonstop7h 00m

£497

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 3/11

18:15-16:05

1 stop26h 50m

Philadelphia

Thu 13/11

17:40-09:20

1 stop10h 40m

£576

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Fri 5/12

07:50-15:30

1 stop12h 40m

Philadelphia

Tue 9/12

19:55-14:05

1 stop13h 10m

£597

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 2/12

19:15-20:09

2 stops53h 54m

Philadelphia

Tue 16/12

19:55-14:05

1 stop13h 10m

£611

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 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 £501.

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 £611. 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 £666.

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 £503. At midday is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £635 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 £571 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 £507 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 29% 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 October 2025, prices for London to Philadelphia flights are approximately 9% cheaper 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

£386

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 £386. The best return flight deal from London to Philadelphia found on momondo in the last 72 hours is £528.
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. 11h 05m 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 £303Free CancellationRating
7.4
8,988 reviews
Search United Airlines flights
IcelandairPriceFrom £336Free CancellationRating
7.0
560 reviews
Search Icelandair flights
Air CanadaPriceFrom £339Free CancellationRating
7.1
10,342 reviews
Search Air Canada flights
JetBluePriceFrom £359Free CancellationRating
7.2
2,908 reviews
Search JetBlue flights
LufthansaPriceFrom £413Free CancellationRating
6.8
7,507 reviews
Search Lufthansa flights
British AirwaysPriceFrom £440Free CancellationRating
6.7
7,467 reviews
Search British Airways flights
Aer LingusPriceFrom £446Free CancellationRating
7.2
1,350 reviews
Search Aer Lingus flights
American AirlinesPriceFrom £447Free CancellationRating
7.2
11,028 reviews
Search American Airlines flights
FinnairPriceFrom £451Free CancellationRating
7.6
1,333 reviews
Search Finnair flights
IberiaPriceFrom £470Free CancellationRating
7.0
2,997 reviews
Search Iberia flights

  • Finnair Flights From London to Philadelphia

    Finnair flies from London to Philadelphia around 17 times per week, with 1,333 momondo users rating the airline 7.6/10. The cheapest Finnair deal from London to Philadelphia in the last 72 hours was £451 (round-trip), much lower than the average airfare cost of £562 for Finnair flights on this route.

  • Aer Lingus Flights From London to Philadelphia

    Another popular option for London to Philadelphia flights is Aer Lingus (7.2/10, 1,350 ratings). Aer Lingus flies from London to Philadelphia around 5 times per week, with deals starting from £446 round-trip and rising to an average price of around £653.

Travelling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Newark
Dover
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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