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Cheap flights from London Heathrow Airport to Philadelphia from $522

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 12/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from London Heathrow Airport to Philadelphia

Cheap round-trip flights

Air Canada Logo
2:05 pm - 9:38 pmLHR-PHL
12h 33m1 stop
Air Canada Logo
3:25 pm - 9:35 amPHL-LHR
13h 10m1 stop
$610Air Canada
Find Deal
vie., sep. 26 - lun., sep. 29
British Airways Logo
12:30 pm - 3:35 pmLHR-PHL
8h 05mnonstop
British Airways Logo
7:50 pm - 7:55 amPHL-LHR
7h 05mnonstop
$611British Airways
Find Deal
mié., oct. 8 - mié., oct. 15
Logo
1:30 pm - 10:56 pmLHR-PHL
14h 26m2 stops
Logo
3:30 pm - 7:10 amPHL-LHR
10h 40m1 stop
$612
Find Deal
vie., nov. 28 - mié., dic. 3
Lufthansa Logo
9:30 am - 4:00 pmLHR-PHL
11h 30m1 stop
Lufthansa Logo
4:50 pm - 6:35 amPHL-LHR
32h 45m1 stop
$614Lufthansa
Find Deal
jue., oct. 2 - sáb., oct. 4
Lufthansa Logo
6:30 am - 4:05 pmLHR-PHL
14h 35m1 stop
Lufthansa Logo
5:40 pm - 5:45 pmPHL-LHR
19h 05m1 stop
$616Lufthansa
Find Deal
jue., nov. 27 - jue., dic. 4
Logo
6:50 am - 2:47 pmLHR-PHL
12h 57m2 stops
Logo
3:30 pm - 11:20 amPHL-LHR
14h 50m2 stops
$621
Find Deal
jue., nov. 13 - dom., nov. 16
Finnair Logo
12:30 pm - 3:35 pmLHR-PHL
8h 05mnonstop
Finnair Logo
7:15 pm - 7:40 amPHL-LHR
31h 25m1 stop
$633Finnair
Find Deal
mar., oct. 14 - dom., oct. 19
American Airlines Logo
10:05 am - 1:05 pmLHR-PHL
8h 00mnonstop
American Airlines Logo
3:55 pm - 7:50 amPHL-LHR
10h 55m1 stop
$636American Airlines
Find Deal
lun., sep. 22 - lun., sep. 29
American Airlines Logo
10:05 am - 1:05 pmLHR-PHL
8h 00mnonstop
American Airlines Logo
7:50 pm - 8:05 amPHL-LHR
7h 15mnonstop
$643American Airlines
Find Deal
lun., sep. 22 - lun., sep. 29
Finnair Logo
10:15 am - 1:25 pmLHR-PHL
8h 10mnonstop
Finnair Logo
6:51 pm - 9:15 amPHL-LHR
9h 24m1 stop
$651Finnair
Find Deal
jue., nov. 27 - jue., dic. 4

United Airlines flights from London Heathrow Airport to Philadelphia

Our best United Airlines deals on London Heathrow Airport to Philadelphia flight tickets
United Airlines
Sep 16
LHR2:05 pmLondon Heathrow
12h 33m
1 stop
PHL9:38 pmPhiladelphia
Sep 23
PHL3:25 pmPhiladelphia
10h 05m
1 stop
LHR6:30 amLondon Heathrow
$618
Find similar
United Airlines
Oct 9
LHR9:30 amLondon Heathrow
10h 08m
1 stop
PHL2:38 pmPhiladelphia
Oct 16
PHL3:00 pmPhiladelphia
14h 40m
1 stop
LHR10:40 amLondon Heathrow
$619
Find similar
United Airlines
Sep 22
LHR9:30 amLondon Heathrow
17h 08m
1 stop
PHL9:38 pmPhiladelphia
Sep 29
PHL3:25 pmPhiladelphia
13h 10m
1 stop
LHR9:35 amLondon Heathrow
$620
Find similar

American Airlines flights from London Heathrow Airport to Philadelphia

Our best American Airlines deals on London Heathrow Airport to Philadelphia flight tickets
American Airlines
Sep 16
LHR8:00 amLondon Heathrow
10h 55m
1 stop
PHL1:55 pmPhiladelphia
Sep 23
PHL10:15 pmPhiladelphia
7h 05m
LHR10:20 amLondon Heathrow
$619
Find similar
American Airlines
Sep 22
LHR10:05 amLondon Heathrow
8h 00m
PHL1:05 pmPhiladelphia
Sep 29
PHL3:55 pmPhiladelphia
10h 55m
1 stop
LHR7:50 amLondon Heathrow
$636
Find similar
American Airlines
Sep 22
LHR10:05 amLondon Heathrow
8h 00m
PHL1:05 pmPhiladelphia
Sep 29
PHL7:50 pmPhiladelphia
7h 15m
LHR8:05 amLondon Heathrow
$643
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated septiembre 11, 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

vie. 9/26

2:05 pm-9:38 pm

1 stop12h 33m

Philadelphia

lun. 9/29

3:25 pm-9:35 am

1 stop13h 10m

$610

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

mié. 10/8

12:30 pm-3:35 pm

Nonstop8h 05m

Philadelphia

mié. 10/15

7:50 pm-7:55 am

Nonstop7h 05m

$611

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

vie. 11/28

1:30 pm-10:56 pm

2 stops14h 26m

Philadelphia

mié. 12/3

3:30 pm-7:10 am

1 stop10h 40m

$612

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

jue. 10/2

9:30 am-4:00 pm

1 stop11h 30m

Philadelphia

sáb. 10/4

4:50 pm-6:35 am

1 stop32h 45m

$614

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

jue. 11/27

6:30 am-4:05 pm

1 stop14h 35m

Philadelphia

jue. 12/4

5:40 pm-5:45 pm

1 stop19h 05m

$616

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

jue. 11/13

6:50 am-2:47 pm

2 stops12h 57m

Philadelphia

dom. 11/16

3:30 pm-11:20 am

2 stops14h 50m

$621

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

mar. 10/14

12:30 pm-3:35 pm

Nonstop8h 05m

Philadelphia

dom. 10/19

7:15 pm-7:40 am

1 stop31h 25m

$633

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

lun. 9/22

10:05 am-1:05 pm

Nonstop8h 00m

Philadelphia

lun. 9/29

3:55 pm-7:50 am

1 stop10h 55m

$636

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

lun. 9/22

10:05 am-1:05 pm

Nonstop8h 00m

Philadelphia

lun. 9/29

7:50 pm-8:05 am

Nonstop7h 15m

$643

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

jue. 11/27

10:15 am-1:25 pm

Nonstop8h 10m

Philadelphia

jue. 12/4

6:51 pm-9:15 am

1 stop9h 24m

$651

Flights are sorted by cheapest round-trip 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 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 $635, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Philadelphia, with average flight prices from London Heathrow Airport averaging around $666.

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 $740. 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 $891.

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 $824.

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 $753 when searching 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 $697 on momondo.

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

There are 4 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 September 2025, prices for London Heathrow Airport to Philadelphia flights are approximately 2% 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

$732

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 $732. The best round-trip flight deal from London Heathrow Airport to Philadelphia found on momondo in the last 72 hours is $630.
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)
Search flight deals

  • 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 8h 00m.

  • 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
IberiaPriceFrom $559Free CancellationRating
7.0
2,929 reviews
Search Iberia flights
American AirlinesPriceFrom $592Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $616Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
FinnairPriceFrom $648Free CancellationRating
7.6
1,323 reviews
Search Finnair flights
Aer LingusPriceFrom $725Free CancellationRating
7.2
1,271 reviews
Search Aer Lingus 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 20 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 20 flights from London Heathrow Airport to Philadelphia in any given week. The average American Airlines airfare for this route is around $780, with deals from around $592 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
Cape May
Rehoboth Beach
Ocean City
Wildwood Crest
King of Prussia
Dewey Beach
Reading
Newark
Cherry Hill
North Wildwood
Dover
Lewes
Avalon
Stone Harbor
Vineland
Essington
Pottstown
New Castle
Exton

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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