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Cheap flights from London Heathrow Airport to Philadelphia from £360

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 Heathrow Airport to Philadelphia departing on 24/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London Heathrow Airport to Philadelphia

Cheap return flights

United Airlines Logo
07:30 - 19:05LHR-PHL
15h 35m2 stops
United Airlines Logo
20:00 - 10:50PHL-LHR
9h 50m1 stop
£439United Airlines
Find Deal
Thu, 30 Oct - Sat, 8 Nov
Multiple Airlines Logo
08:30 - 16:00LHR-PHL
12h 30m1 stop
Multiple Airlines Logo
15:25 - 09:35PHL-LHR
13h 10m1 stop
£440Multiple Airlines
Find Deal
Thu, 16 Oct - Thu, 23 Oct
United Airlines Logo
07:45 - 18:57LHR-PHL
16h 12m2 stops
United Airlines Logo
15:00 - 10:10PHL-LHR
14h 10m2 stops
£441United Airlines
Find Deal
Mon, 29 Sep - Sat, 11 Oct
British Airways Logo
06:30 - 13:55LHR-PHL
12h 25m1 stop
British Airways Logo
18:35 - 06:35PHL-LHR
7h 00mdirect
£442British Airways
Find Deal
Wed, 19 Nov - Wed, 3 Dec
Aer Lingus Logo
12:00 - 19:00LHR-PHL
12h 00m1 stop
Aer Lingus Logo
20:30 - 11:10PHL-LHR
9h 40m1 stop
£444Aer Lingus
Find Deal
Wed, 15 Oct - Wed, 22 Oct
Air Canada Logo
06:50 - 14:47LHR-PHL
12h 57m2 stops
Air Canada Logo
15:30 - 07:10PHL-LHR
10h 40m1 stop
£447Air Canada
Find Deal
Fri, 5 Dec - Tue, 6 Jan
Air Canada Logo
06:50 - 14:38LHR-PHL
12h 48m2 stops
Air Canada Logo
15:25 - 06:30PHL-LHR
10h 05m1 stop
£448Air Canada
Find Deal
Sun, 12 Oct - Wed, 22 Oct
Finnair Logo
19:10 - 09:50LHR-PHL
19h 40m1 stop
Finnair Logo
15:35 - 10:25PHL-LHR
13h 50m2 stops
£449Finnair
Find Deal
Mon, 5 Jan - Tue, 27 Jan
British Airways Logo
07:50 - 13:55LHR-PHL
11h 05m1 stop
British Airways Logo
18:35 - 06:35PHL-LHR
7h 00mdirect
£450British Airways
Find Deal
Fri, 21 Nov - Tue, 2 Dec
Aer Lingus Logo
09:50 - 17:00LHR-PHL
11h 10m1 stop
Aer Lingus Logo
17:30 - 08:05PHL-LHR
9h 35m1 stop
£455Aer Lingus
Find Deal
Fri, 31 Oct - Thu, 6 Nov

United Airlines flights from London Heathrow Airport to Philadelphia

Our best United Airlines deals on London Heathrow Airport to Philadelphia flight tickets
United Airlines
30 Oct
LHR07:30London Heathrow
15h 35m
2 stops
PHL19:05Philadelphia
8 Nov
PHL20:00Philadelphia
9h 50m
1 stop
LHR10:50London Heathrow
£439
Find similar
United Airlines
29 Sept
LHR07:45London Heathrow
16h 12m
2 stops
PHL18:57Philadelphia
11 Oct
PHL15:00Philadelphia
14h 10m
2 stops
LHR10:10London Heathrow
£441
Find similar
United Airlines
24 Sept
LHR07:30London Heathrow
13h 30m
1 stop
PHL16:00Philadelphia
1 Oct
PHL15:25Philadelphia
10h 05m
1 stop
LHR06:30London Heathrow
£445
Find similar

Lufthansa flights from London Heathrow Airport to Philadelphia

Our best Lufthansa deals on London Heathrow Airport 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
£444
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
£444
Find similar
Lufthansa
10 Oct
LHR08:30London Heathrow
12h 30m
1 stop
PHL16:00Philadelphia
18 Oct
PHL16:50Philadelphia
12h 10m
1 stop
LHR10:00London Heathrow
£452
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 16 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 30/10

07:30-19:05

2 stops15h 35m

Philadelphia

Sat 8/11

20:00-10:50

1 stop9h 50m

£439

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 16/10

08:30-16:00

1 stop12h 30m

Philadelphia

Thu 23/10

15:25-09:35

1 stop13h 10m

£440

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 29/9

07:45-18:57

2 stops16h 12m

Philadelphia

Sat 11/10

15:00-10:10

2 stops14h 10m

£441

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 19/11

06:30-13:55

1 stop12h 25m

Philadelphia

Wed 3/12

18:35-06:35

Nonstop7h 00m

£442

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 15/10

12:00-19:00

1 stop12h 00m

Philadelphia

Wed 22/10

20:30-11:10

1 stop9h 40m

£444

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 5/12

06:50-14:47

2 stops12h 57m

Philadelphia

Tue 6/1

15:30-07:10

1 stop10h 40m

£447

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 12/10

06:50-14:38

2 stops12h 48m

Philadelphia

Wed 22/10

15:25-06:30

1 stop10h 05m

£448

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/1

19:10-09:50

1 stop19h 40m

Philadelphia

Tue 27/1

15:35-10:25

2 stops13h 50m

£449

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 21/11

07:50-13:55

1 stop11h 05m

Philadelphia

Tue 2/12

18:35-06:35

Nonstop7h 00m

£450

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 31/10

09:50-17:00

1 stop11h 10m

Philadelphia

Thu 6/11

17:30-08:05

1 stop9h 35m

£455

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 Heathrow Airport 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 typical price of a round-trip flight between London Heathrow Airport and Philadelphia?

What is the cheapest month to fly to Philadelphia?

If you aren’t able to travel during the month of March, then book flights to Philadelphia from London Heathrow Airport during February instead. Flights to Philadelphia in February, while not as cheap as those in March, still average around £492.

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 £593. On the other hand, Sunday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £653.

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 £495. At midday is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £626 per ticket.

What is the cheapest London Heathrow to Philadelphia flight route?

Fly from London Heathrow to Philadelphia for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around £556 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 Heathrow Airport for as low as £511 on momondo.

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

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

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

How have London Heathrow Airport to Philadelphia flight prices changed over time?

As of September 2025, prices for London Heathrow Airport to Philadelphia flights are approximately 7% cheaper when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Philadelphia

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

Cheap London Heathrow Airport to Philadelphia (LHR to PHL) flight deals and tips

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

Best price found

£540

Fastest flight time

7h 55m

Direct flights

Every day

Airports in Philadelphia

1 airport
The best one-way flight to Philadelphia from London Heathrow Airport in the past 72 hours is £540. The best return flight deal from London Heathrow Airport to Philadelphia found on momondo in the last 72 hours is £498.
The fastest flight from London Heathrow Airport to Philadelphia takes 7h 55m
Direct flights go from London Heathrow Airport to Philadelphia every day.
There is 1 airport near Philadelphia: Philadelphia (PHL)
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  • How far is London Heathrow to Philadelphia by plane?

    London Heathrow and Philadelphia are 3526.0 mi apart from one another. Flights usually cover this in 8h 00m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from London Heathrow Airport to Philadelphia Airport are updated daily.

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

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

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

    The travel and health documents required for your trip to Philadelphia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Philadelphia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from London Heathrow Airport to Philadelphia?

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

Best airlines flying from London Heathrow Airport to Philadelphia

Compare and see reviews for airlines that fly from London Heathrow Airport to Philadelphia with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom £299Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
IcelandairPriceFrom £331Free CancellationRating
7.0
544 reviews
Search Icelandair flights
Air CanadaPriceFrom £333Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
JetBluePriceFrom £354Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
LufthansaPriceFrom £407Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
British AirwaysPriceFrom £430Free CancellationRating
6.7
7,363 reviews
Search British Airways flights
FinnairPriceFrom £437Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
American AirlinesPriceFrom £440Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Aer LingusPriceFrom £447Free CancellationRating
7.2
1,274 reviews
Search Aer Lingus flights
IberiaPriceFrom £466Free CancellationRating
7.0
2,924 reviews
Search Iberia flights

  • Finnair Flights From London Heathrow Airport to Philadelphia

    Finnair flies from London Heathrow Airport to Philadelphia around 20 times per week, with 1,324 momondo users rating the airline 7.6/10. The cheapest Finnair deal from London Heathrow Airport 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 Heathrow Airport to Philadelphia

    £599 is the best American Airlines flight deal from London Heathrow Airport to Philadelphia found on momondo over the last 72 hours. The average American Airlines ticket price found was closer to £792, however, with flight time and availability significantly affecting the price. American Airlines (7.2/10 from 10,000 user reviews) flies into Philadelphia from London Heathrow Airport 20 times in an average week so prices can vary.

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?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Philadelphia for you.

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

momondo does allow users to show only those flights to Philadelphia from London which offer a flexible booking policy as well as other useful filters and features.

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?

Price alerts on flights to Philadelphia from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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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