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Cheap flights from London Heathrow Airport to Philadelphia from $351

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 5/3. 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 round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from London Heathrow Airport to Philadelphia.
United Airlines Logo
7:25 am - 10:28 pmLHR-PHL
20h 03m2 stops
United Airlines Logo
6:15 am - 6:30 amPHL-LHR
19h 15m2 stops
$394United Airlines
Find Deal
Thu, May 1 - Thu, May 8
 Logo
6:30 am - 4:00 pmLHR-PHL
14h 30m1 stop
 Logo
7:30 am - 6:30 amPHL-LHR
18h 00m2 stops
Sat, Apr 26 - Sat, May 10
Air Canada Logo
9:30 am - 2:47 pmLHR-PHL
10h 17m1 stop
Air Canada Logo
9:00 am - 9:00 pmPHL-LHR
31h 00m2 stops
$424Air Canada
Find Deal
Sat, Apr 19 - Sat, Apr 26
Air Canada Logo
6:50 am - 2:33 pmLHR-PHL
12h 43m2 stops
Air Canada Logo
10:35 am - 6:30 amPHL-LHR
14h 55m2 stops
$428Air Canada
Find Deal
Sat, Jun 7 - Wed, Jul 30
Finnair Logo
6:10 am - 4:25 pmLHR-PHL
15h 15m1 stop
Finnair Logo
2:00 pm - 6:15 amPHL-LHR
11h 15m1 stop
$572Finnair
Find Deal
Tue, May 6 - Tue, May 20
American Airlines Logo
7:45 am - 3:55 pmLHR-PHL
13h 10m1 stop
American Airlines Logo
2:00 pm - 6:15 amPHL-LHR
11h 15m1 stop
$584American Airlines
Find Deal
Tue, Apr 29 - Tue, May 6
American Airlines Logo
7:50 am - 3:55 pmLHR-PHL
13h 05m1 stop
American Airlines Logo
2:00 pm - 6:15 amPHL-LHR
11h 15m1 stop
$585American Airlines
Find Deal
Wed, Apr 30 - Wed, May 7
British Airways Logo
1:25 pm - 7:00 pmLHR-PHL
10h 35m1 stop
British Airways Logo
6:03 pm - 7:50 amPHL-LHR
8h 47m1 stop
$589British Airways
Find Deal
Wed, Apr 30 - Mon, May 5
British Airways Logo
1:25 pm - 7:00 pmLHR-PHL
10h 35m1 stop
British Airways Logo
6:30 pm - 6:40 amPHL-LHR
7h 10mnonstop
$593British Airways
Find Deal
Wed, Apr 30 - Mon, May 5
Finnair Logo
1:30 pm - 4:25 pmLHR-PHL
7h 55mnonstop
Finnair Logo
2:00 pm - 6:15 amPHL-LHR
11h 15m1 stop
$595Finnair
Find Deal
Tue, May 6 - Tue, May 20

United Airlines flights from London Heathrow Airport to Philadelphia

Our best United Airlines deals on London Heathrow Airport to Philadelphia flight tickets
United Airlines
May 1
LHR7:25 amLondon Heathrow
20h 03m
2 stops
PHL10:28 pmPhiladelphia
May 8
PHL6:15 amPhiladelphia
19h 15m
2 stops
LHR6:30 amLondon Heathrow
United Airlines
May 1
LHR7:25 amLondon Heathrow
20h 03m
2 stops
PHL10:28 pmPhiladelphia
May 8
PHL6:15 amPhiladelphia
19h 15m
2 stops
LHR6:30 amLondon Heathrow
United Airlines
May 1
LHR7:25 amLondon Heathrow
20h 03m
2 stops
PHL10:28 pmPhiladelphia
May 10
PHL6:15 amPhiladelphia
18h 40m
2 stops
LHR5:55 amLondon 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
Apr 19
LHR9:30 amLondon Heathrow
10h 17m
1 stop
PHL2:47 pmPhiladelphia
Apr 26
PHL9:00 amPhiladelphia
31h 00m
2 stops
LHR9:00 pmLondon Heathrow
Air Canada
Jun 7
LHR6:50 amLondon Heathrow
12h 43m
2 stops
PHL2:33 pmPhiladelphia
Jul 30
PHL10:35 amPhiladelphia
14h 55m
2 stops
LHR6:30 amLondon Heathrow
Air Canada
Jun 18
LHR6:50 amLondon Heathrow
12h 43m
2 stops
PHL2:33 pmPhiladelphia
Jun 28
PHL10:35 amPhiladelphia
14h 55m
2 stops
LHR6:30 amLondon 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 cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from London Heathrow Airport is in March. Flight prices, which tend to average around $659, are often lower during this time because this is during the off-season. The month of February is another great option to travel to Philadelphia, with average flight prices from London Heathrow Airport averaging around $669.

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

The cheapest day to depart from London Heathrow Airport to Philadelphia is on a Tuesday. Travelers who choose to depart for Philadelphia on a Tuesday will often find tickets for as low as $775. On the other hand, Friday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $901.

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

According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from London Heathrow Airport to Philadelphia in the evening for as low as $704. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the morning when prices are around $840.

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 $764 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 $691 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 round-trip 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

$351

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 $351. The best round-trip flight deal from London Heathrow Airport to Philadelphia found on momondo in the last 72 hours is $394.
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?

    The straight-line distance from London Heathrow to Philadelphia is 3526.0 mi. By plane, this route typically takes 7h 45m.

  • 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 for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Philadelphia Airport.

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

    The required travel and health documents for your Philadelphia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • 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
British AirwaysPriceFrom $583Free CancellationRating
6.6
6,718 reviews
Search British Airways flights
American AirlinesPriceFrom $596Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Aer LingusPriceFrom $640Free CancellationRating
7.0
1,059 reviews
Search Aer Lingus flights
IberiaPriceFrom $644Free CancellationRating
7.0
2,660 reviews
Search Iberia flights
FinnairPriceFrom $648Free CancellationRating
7.6
1,267 reviews
Search Finnair flights
  • Finnair Flights From London Heathrow Airport to Philadelphia

    The lowest priced Finnair flight from London Heathrow Airport to Philadelphia from the last 72 hours was $648. Generally, Finnair has 21 flights on this route every week with an average price of $767. Finnair is rated 7.6/10 by our users.

  • American Airlines Flights From London Heathrow Airport to Philadelphia

    American Airlines (7.2/10 from 10,000 reviews) operates around 21 flights from London Heathrow Airport to Philadelphia in any given week. The average American Airlines airfare for this route is around $773, with deals from around $596 rare but found on momondo. Referenced prices are for round-trip London Heathrow Airport to Philadelphia flight searches in the last 72 hours.


Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
Rehoboth Beach
Cape May
Ocean City
Wildwood Crest
Reading
King of Prussia
Newark
Dover
North Wildwood
Cherry Hill
Dewey Beach
Lewes
Exton
Vineland
Essington
Pottstown
New Castle
Avalon
West Chester

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?

All flight searches from London to Philadelphia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Philadelphia?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Philadelphia.

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

Yes. momondo can track prices for London to Philadelphia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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