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Cheap flights from London Heathrow Airport to Philadelphia from £301

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 16/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London Heathrow Airport to Philadelphia

Cheap return flights

JetBlue Logo
08:25 - 09:40LHR-PHL
30h 15m1 stop
JetBlue Logo
10:20 - 06:30PHL-LHR
15h 10m1 stop
£418JetBlue
Find Deal
Wed, 27 Aug - Tue, 16 Sep
JetBlue Logo
08:25 - 15:00LHR-PHL
11h 35m1 stop
JetBlue Logo
18:10 - 06:30PHL-LHR
31h 20m1 stop
£425JetBlue
Find Deal
Mon, 8 Sep - Mon, 15 Sep
JetBlue Logo
08:25 - 09:40LHR-PHL
30h 15m1 stop
JetBlue Logo
10:20 - 06:30PHL-LHR
15h 10m1 stop
£428JetBlue
Find Deal
Mon, 1 Sep - Tue, 16 Sep
JetBlue Logo
08:25 - 09:40LHR-PHL
30h 15m1 stop
JetBlue Logo
10:20 - 06:30PHL-LHR
15h 10m1 stop
£429JetBlue
Find Deal
Wed, 27 Aug - Wed, 10 Sep
Aer Lingus Logo
13:25 - 19:00LHR-PHL
10h 35m1 stop
Aer Lingus Logo
20:30 - 11:10PHL-LHR
9h 40m1 stop
£443Aer Lingus
Find Deal
Mon, 1 Sep - Wed, 10 Sep
British Airways Logo
07:50 - 13:55LHR-PHL
11h 05m1 stop
British Airways Logo
18:51 - 09:15PHL-LHR
9h 24m1 stop
£462British Airways
Find Deal
Wed, 12 Nov - Thu, 20 Nov
Air Canada Logo
06:50 - 22:08LHR-PHL
20h 18m2 stops
Air Canada Logo
15:25 - 09:35PHL-LHR
13h 10m1 stop
£472Air Canada
Find Deal
Mon, 8 Sep - Mon, 15 Sep
Air Canada Logo
06:50 - 22:08LHR-PHL
20h 18m2 stops
Air Canada Logo
15:25 - 06:30PHL-LHR
10h 05m1 stop
£472Air Canada
Find Deal
Tue, 2 Sep - Sat, 20 Sep
United Airlines Logo
08:30 - 16:00LHR-PHL
12h 30m1 stop
United Airlines Logo
20:05 - 10:50PHL-LHR
9h 45m1 stop
£475United Airlines
Find Deal
Thu, 27 Nov - Thu, 4 Dec
United Airlines Logo
08:30 - 16:00LHR-PHL
12h 30m1 stop
United Airlines Logo
10:33 - 06:40PHL-LHR
15h 07m1 stop
£476United Airlines
Find Deal
Thu, 27 Nov - Thu, 4 Dec

United Airlines flights from London Heathrow Airport to Philadelphia

Our best United Airlines deals on London Heathrow Airport to Philadelphia flight tickets
United Airlines
27 Nov
LHR08:30London Heathrow
12h 30m
1 stop
PHL16:00Philadelphia
4 Dec
PHL20:05Philadelphia
9h 45m
1 stop
LHR10:50London Heathrow
£475
Find similar
United Airlines
27 Nov
LHR08:30London Heathrow
12h 30m
1 stop
PHL16:00Philadelphia
4 Dec
PHL10:33Philadelphia
15h 07m
1 stop
LHR06:40London Heathrow
£476
Find similar
United Airlines
14 Sept
LHR07:25London Heathrow
19h 06m
2 stops
PHL21:31Philadelphia
21 Sept
PHL10:30Philadelphia
15h 25m
1 stop
LHR06:55London Heathrow
£478
Find similar

JetBlue flights from London Heathrow Airport to Philadelphia

Our best JetBlue deals on London Heathrow Airport to Philadelphia flight tickets
JetBlue
27 Aug
LHR08:25London Heathrow
30h 15m
1 stop
PHL09:40Philadelphia
16 Sept
PHL10:20Philadelphia
15h 10m
1 stop
LHR06:30London Heathrow
£418
Find similar
JetBlue
8 Sept
LHR08:25London Heathrow
11h 35m
1 stop
PHL15:00Philadelphia
15 Sept
PHL18:10Philadelphia
31h 20m
1 stop
LHR06:30London Heathrow
£425
Find similar
JetBlue
1 Sept
LHR08:25London Heathrow
30h 15m
1 stop
PHL09:40Philadelphia
16 Sept
PHL10:20Philadelphia
15h 10m
1 stop
LHR06:30London Heathrow
£428
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 1 August 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

Wed 27/8

08:25-09:40

1 stop30h 15m

Philadelphia

Tue 16/9

10:20-06:30

1 stop15h 10m

£418

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 8/9

08:25-15:00

1 stop11h 35m

Philadelphia

Mon 15/9

18:10-06:30

1 stop31h 20m

£425

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

08:25-09:40

1 stop30h 15m

Philadelphia

Tue 16/9

10:20-06:30

1 stop15h 10m

£428

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 27/8

08:25-09:40

1 stop30h 15m

Philadelphia

Wed 10/9

10:20-06:30

1 stop15h 10m

£429

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

13:25-19:00

1 stop10h 35m

Philadelphia

Wed 10/9

20:30-11:10

1 stop9h 40m

£443

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 12/11

07:50-13:55

1 stop11h 05m

Philadelphia

Thu 20/11

18:51-09:15

1 stop9h 24m

£462

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 8/9

06:50-22:08

2 stops20h 18m

Philadelphia

Mon 15/9

15:25-09:35

1 stop13h 10m

£472

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 2/9

06:50-22:08

2 stops20h 18m

Philadelphia

Sat 20/9

15:25-06:30

1 stop10h 05m

£472

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/11

08:30-16:00

1 stop12h 30m

Philadelphia

Thu 4/12

20:05-10:50

1 stop9h 45m

£475

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/11

08:30-16:00

1 stop12h 30m

Philadelphia

Thu 4/12

10:33-06:40

1 stop15h 07m

£476

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 September instead. Flights to Philadelphia in September, while not as cheap as those in March, still average around £506.

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 £609. 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 £669.

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 £508. At midday is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £642 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 £569 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 £518 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?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Philadelphia.

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

As of August 2025, prices for London Heathrow Airport to Philadelphia flights are approximately 11% more expensive 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

£301

Fastest flight time

10h 35m

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 £301. The best return flight deal from London Heathrow Airport to Philadelphia found on momondo in the last 72 hours is £418.
The fastest flight from London Heathrow Airport to Philadelphia takes 10h 35m
Direct flights go from London Heathrow Airport to Philadelphia every day.
There is 1 airport near Philadelphia: Philadelphia (PHL)
Search flight deals

  • 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 10h 35m, 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 £306Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
IcelandairPriceFrom £340Free CancellationRating
7.0
520 reviews
Search Icelandair flights
Air CanadaPriceFrom £342Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights
JetBluePriceFrom £360Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
LufthansaPriceFrom £419Free CancellationRating
6.8
7,275 reviews
Search Lufthansa flights
British AirwaysPriceFrom £440Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
FinnairPriceFrom £449Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
Aer LingusPriceFrom £460Free CancellationRating
7.1
1,192 reviews
Search Aer Lingus flights
American AirlinesPriceFrom £460Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
IberiaPriceFrom £477Free CancellationRating
7.0
2,859 reviews
Search Iberia flights

  • Finnair Flights From London Heathrow Airport to Philadelphia

    Finnair flies from London Heathrow Airport to Philadelphia around 21 times per week, with 1,316 momondo users rating the airline 7.6/10. The cheapest Finnair deal from London Heathrow Airport to Philadelphia in the last 72 hours was £595 (round-trip), much lower than the average airfare cost of £749 for Finnair flights on this route.

  • American Airlines Flights From London Heathrow Airport to Philadelphia

    £609 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 £791, 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 21 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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