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Cheap flights from London Heathrow Airport to Philadelphia from £268

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 3/5. 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

KAYAK's recommended return flight deals from the most popular airlines that fly from London Heathrow Airport to Philadelphia.
United Airlines Logo
07:25 - 22:28LHR-PHL
20h 03m2 stops
United Airlines Logo
06:15 - 06:30PHL-LHR
19h 15m2 stops
£301United Airlines
Find Deal
Thu, 1 May - Thu, 8 May
 Logo
06:30 - 16:00LHR-PHL
14h 30m1 stop
 Logo
07:30 - 06:30PHL-LHR
18h 00m2 stops
Sat, 26 Apr - Sat, 10 May
Finnair Logo
06:10 - 16:25LHR-PHL
15h 15m1 stop
Finnair Logo
14:00 - 06:15PHL-LHR
11h 15m1 stop
£436Finnair
Find Deal
Tue, 6 May - Tue, 20 May
American Airlines Logo
07:45 - 15:55LHR-PHL
13h 10m1 stop
American Airlines Logo
14:00 - 06:15PHL-LHR
11h 15m1 stop
£445American Airlines
Find Deal
Tue, 29 Apr - Tue, 6 May
American Airlines Logo
07:50 - 15:55LHR-PHL
13h 05m1 stop
American Airlines Logo
14:00 - 06:15PHL-LHR
11h 15m1 stop
£446American Airlines
Find Deal
Wed, 30 Apr - Wed, 7 May
British Airways Logo
13:25 - 19:00LHR-PHL
10h 35m1 stop
British Airways Logo
18:03 - 07:50PHL-LHR
8h 47m1 stop
£449British Airways
Find Deal
Wed, 30 Apr - Mon, 5 May
British Airways Logo
13:25 - 19:00LHR-PHL
10h 35m1 stop
British Airways Logo
18:30 - 06:40PHL-LHR
7h 10mdirect
£452British Airways
Find Deal
Wed, 30 Apr - Mon, 5 May
Finnair Logo
13:30 - 16:25LHR-PHL
7h 55mdirect
Finnair Logo
14:00 - 06:15PHL-LHR
11h 15m1 stop
£454Finnair
Find Deal
Tue, 6 May - Tue, 20 May
Iberia Logo
06:35 - 16:40LHR-PHL
15h 05m1 stop
Iberia Logo
22:20 - 10:20PHL-LHR
7h 00mdirect
£511Iberia
Find Deal
Mon, 1 Sep - Thu, 18 Sep
Iberia Logo
06:10 - 15:50LHR-PHL
14h 40m1 stop
Iberia Logo
22:20 - 10:20PHL-LHR
7h 00mdirect
£513Iberia
Find Deal
Tue, 2 Sep - Wed, 17 Sep

United Airlines flights from London Heathrow Airport to Philadelphia

Our best United Airlines deals on London Heathrow Airport to Philadelphia flight tickets
United Airlines
1 May
LHR07:25London Heathrow
20h 03m
2 stops
PHL22:28Philadelphia
8 May
PHL06:15Philadelphia
19h 15m
2 stops
LHR06:30London Heathrow
United Airlines
1 May
LHR07:25London Heathrow
20h 03m
2 stops
PHL22:28Philadelphia
8 May
PHL06:15Philadelphia
19h 15m
2 stops
LHR06:30London Heathrow
United Airlines
1 May
LHR07:25London Heathrow
20h 03m
2 stops
PHL22:28Philadelphia
10 May
PHL06:15Philadelphia
18h 40m
2 stops
LHR05:55London Heathrow

Air Canada flights from London Heathrow Airport to Philadelphia

Our best Air Canada deals on London Heathrow Airport to Philadelphia flight tickets
Air Canada
19 Apr
LHR09:30London Heathrow
10h 17m
1 stop
PHL14:47Philadelphia
26 Apr
PHL09:00Philadelphia
31h 00m
2 stops
LHR21:00London Heathrow
Air Canada
7 Jun
LHR06:50London Heathrow
12h 43m
2 stops
PHL14:33Philadelphia
30 Jul
PHL10:35Philadelphia
14h 55m
2 stops
LHR06:30London Heathrow
Air Canada
19 Apr
LHR12:40London Heathrow
32h 03m
2 stops
PHL15:43Philadelphia
27 Apr
PHL15:30Philadelphia
13h 30m
1 stop
LHR10:00London Heathrow

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 £510.

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 £630. 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 £690.

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 £513. In the morning is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £661 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 25 weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around £582 when searching 25 weeks out.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 £527 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.

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

As of April 2025, prices for London Heathrow Airport to Philadelphia flights are approximately 7% 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

£268

Fastest flight time

7h 45m

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 £268. The best return flight deal from London Heathrow Airport to Philadelphia found on momondo in the last 72 hours is £300.
The fastest flight from London Heathrow Airport to Philadelphia takes 7h 45m
Direct flights go from London Heathrow Airport to Philadelphia every day.
There is 1 airport near Philadelphia: Philadelphia (PHL)

  • 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 7h 45m, 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 £328Free CancellationRating
7.4
8,618 reviews
Search United Airlines flights
IcelandairPriceFrom £343Free CancellationRating
7.0
476 reviews
Search Icelandair flights
Air CanadaPriceFrom £350Free CancellationRating
7.0
9,034 reviews
Search Air Canada flights
JetBluePriceFrom £363Free CancellationRating
7.3
2,919 reviews
Search JetBlue flights
British AirwaysPriceFrom £443Free CancellationRating
6.6
6,718 reviews
Search British Airways flights
LufthansaPriceFrom £445Free CancellationRating
6.7
6,964 reviews
Search Lufthansa flights
FinnairPriceFrom £458Free CancellationRating
7.6
1,267 reviews
Search Finnair flights
American AirlinesPriceFrom £464Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Virgin AtlanticPriceFrom £475Free CancellationRating
7.4
638 reviews
Search Virgin Atlantic flights
Aer LingusPriceFrom £475Free CancellationRating
7.0
1,059 reviews
Search Aer Lingus flights
  • Finnair Flights From London Heathrow Airport to Philadelphia

    Finnair flies from London Heathrow Airport to Philadelphia around 21 times per week, with 1,267 momondo users rating the airline 7.6/10. The cheapest Finnair deal from London Heathrow Airport to Philadelphia in the last 72 hours was £600 (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

    £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 £816, 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
Rehoboth Beach
Cape May
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.


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