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Cheap flights from London to Philadelphia from $489

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 to Philadelphia departing on 10/2. 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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Cheap round-trip flights

Multiple Airlines Logo
1:30 pm - 10:56 pmLHR-PHL
14h 26m2 stops
Multiple Airlines Logo
1:15 pm - 7:10 amPHL-LHR
12h 55m2 stops
$597Multiple Airlines
Find Deal
Fri, Nov 28 - Wed, Dec 3
Multiple Airlines Logo
8:50 am - 5:00 pmLGW-PHL
12h 10m1 stop
Multiple Airlines Logo
5:30 pm - 9:15 amPHL-LGW
10h 45m1 stop
$597Multiple Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
Multiple Airlines Logo
8:30 am - 4:00 pmLHR-PHL
12h 30m1 stop
Multiple Airlines Logo
3:25 pm - 9:35 amPHL-LHR
13h 10m1 stop
$598Multiple Airlines
Find Deal
Thu, Oct 16 - Thu, Oct 23
British Airways Logo
6:30 am - 1:55 pmLHR-PHL
12h 25m1 stop
British Airways Logo
6:35 pm - 6:35 amPHL-LHR
7h 00mnonstop
$599British Airways
Find Deal
Mon, Nov 3 - Thu, Dec 4
Finnair Logo
7:10 pm - 9:50 amLHR-PHL
19h 40m1 stop
Finnair Logo
3:35 pm - 10:25 amPHL-LHR
13h 50m2 stops
$610Finnair
Find Deal
Mon, Jan 5 - Tue, Jan 27
British Airways Logo
7:50 am - 1:55 pmLHR-PHL
11h 05m1 stop
British Airways Logo
6:35 pm - 6:35 amPHL-LHR
7h 00mnonstop
$612British Airways
Find Deal
Fri, Nov 21 - Tue, Dec 2
American Airlines Logo
11:20 am - 2:37 pmLGW-PHL
32h 17m2 stops
American Airlines Logo
3:44 pm - 9:00 amPHL-LGW
36h 16m2 stops
$638American Airlines
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Thu, Feb 19 - Tue, Feb 24
American Airlines Logo
10:05 am - 1:05 pmLHR-PHL
8h 00mnonstop
American Airlines Logo
4:00 pm - 7:20 amPHL-LHR
10h 20m1 stop
$639American Airlines
Find Deal
Mon, Sep 29 - Mon, Oct 6
Iberia Logo
7:50 am - 3:35 pmLCY-PHL
12h 45m1 stop
Iberia Logo
4:40 pm - 8:50 amPHL-LCY
11h 10m1 stop
$702Iberia
Find Deal
Thu, Feb 5 - Thu, Feb 19
Iberia Logo
11:45 am - 8:20 pmLGW-PHL
37h 35m2 stops
Iberia Logo
8:00 pm - 7:00 pmPHL-LGW
18h 00m1 stop
$714Iberia
Find Deal
Fri, Feb 20 - Mon, Feb 23

British Airways flights from London to Philadelphia

Our best British Airways deals on London to Philadelphia flight tickets
British Airways
Nov 3
LHR6:30 amLondon Heathrow
12h 25m
1 stop
PHL1:55 pmPhiladelphia
Dec 4
PHL6:35 pmPhiladelphia
7h 00m
LHR6:35 amLondon Heathrow
$599
Find similar
British Airways
Nov 21
LHR7:50 amLondon Heathrow
11h 05m
1 stop
PHL1:55 pmPhiladelphia
Dec 2
PHL6:35 pmPhiladelphia
7h 00m
LHR6:35 amLondon Heathrow
$612
Find similar
British Airways
Nov 21
LHR7:50 amLondon Heathrow
11h 05m
1 stop
PHL1:55 pmPhiladelphia
Dec 2
PHL6:35 pmPhiladelphia
7h 00m
LHR6:35 amLondon Heathrow
$613
Find similar

JetBlue flights from London to Philadelphia

Our best JetBlue deals on London to Philadelphia flight tickets
JetBlue
Nov 24
LHR9:20 amLondon Heathrow
17h 37m
1 stop
PHL9:57 pmPhiladelphia
Dec 6
PHL4:32 pmPhiladelphia
9h 23m
1 stop
LHR6:55 amLondon Heathrow
$602
Find similar
JetBlue
Sep 24
LGW12:10 pmLondon Gatwick
14h 40m
1 stop
PHL9:50 pmPhiladelphia
Oct 3
PHL6:10 pmPhiladelphia
10h 25m
1 stop
LGW9:35 amLondon Gatwick
$680
Find similar
JetBlue
Sep 22
LGW12:10 pmLondon Gatwick
14h 40m
1 stop
PHL9:50 pmPhiladelphia
Sep 29
PHL10:20 amPhiladelphia
18h 15m
1 stop
LGW9:35 amLondon Gatwick
$896
Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 11/28

1:30 pm-10:56 pm

2 stops14h 26m

Philadelphia

Wed 12/3

1:15 pm-7:10 am

2 stops12h 55m

$597

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 10/30

8:50 am-5:00 pm

1 stop12h 10m

Philadelphia

Thu 11/6

5:30 pm-9:15 am

1 stop10h 45m

$597

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 10/16

8:30 am-4:00 pm

1 stop12h 30m

Philadelphia

Thu 10/23

3:25 pm-9:35 am

1 stop13h 10m

$598

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 11/3

6:30 am-1:55 pm

1 stop12h 25m

Philadelphia

Thu 12/4

6:35 pm-6:35 am

Nonstop7h 00m

$599

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/5

7:10 pm-9:50 am

1 stop19h 40m

Philadelphia

Tue 1/27

3:35 pm-10:25 am

2 stops13h 50m

$610

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 11/21

7:50 am-1:55 pm

1 stop11h 05m

Philadelphia

Tue 12/2

6:35 pm-6:35 am

Nonstop7h 00m

$612

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 2/19

11:20 am-2:37 pm

2 stops32h 17m

Philadelphia

Tue 2/24

3:44 pm-9:00 am

2 stops36h 16m

$638

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 9/29

10:05 am-1:05 pm

Nonstop8h 00m

Philadelphia

Mon 10/6

4:00 pm-7:20 am

1 stop10h 20m

$639

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Thu 2/5

7:50 am-3:35 pm

1 stop12h 45m

Philadelphia

Thu 2/19

4:40 pm-8:50 am

1 stop11h 10m

$702

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Fri 2/20

11:45 am-8:20 pm

2 stops37h 35m

Philadelphia

Mon 2/23

8:00 pm-7:00 pm

1 stop18h 00m

$714

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 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 and Philadelphia?

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from London is in February. Flight prices, which tend to average around $657, 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 averaging around $667.

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

The cheapest day to depart from London to Philadelphia is on a Tuesday. Travelers who choose to depart for Philadelphia on a Tuesday will often find tickets for as low as $748. On the other hand, Friday is the most expensive day to depart from London 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 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 $825.

What is the cheapest London to Philadelphia flight route?

Fly from London Heathrow to Philadelphia for the best London - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $756 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from London for as low as $695 on momondo.

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

There are 4 cabin classes available to choose from on London 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 to Philadelphia flights?

You could potentially save up to 36% on your flight if you consider stops on a London to Philadelphia flight.

How have London to Philadelphia flight prices changed over time?

As of September 2025, prices for London to Philadelphia flights are approximately 1% more expensive when compared to flights at the same time last year.

When to book flights from London to Philadelphia

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

Cheap London to Philadelphia (LON to PHL) flight deals and tips

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

Best Price Found

$730

Fastest flight time

7h 55m

Direct flights

Every day

Airports in Philadelphia

1 airport
The best one-way flight to Philadelphia from London in the past 72 hours is $730. The best round-trip flight deal from London to Philadelphia found on momondo in the last 72 hours is $630.
The fastest flight from London to Philadelphia takes 7h 55m
Direct flights go from London to Philadelphia every day.
There is 1 airport near Philadelphia: Philadelphia (PHL)
Search flight deals

  • How far is London to Philadelphia by plane?

    There are 3538.9 mi between London and Philadelphia. 8h 00m is a normal flight duration for this route.

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Philadelphia Airport.

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

    The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from London to Philadelphia

Compare and see reviews for airlines that fly from London to Philadelphia with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom $559Free CancellationRating
7.0
2,924 reviews
Search Iberia flights
American AirlinesPriceFrom $592Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $616Free CancellationRating
6.7
7,363 reviews
Search British Airways flights
FinnairPriceFrom $642Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
Aer LingusPriceFrom $670Free CancellationRating
7.2
1,274 reviews
Search Aer Lingus flights

  • Finnair Flights From London to Philadelphia

    Finnair flight deals from London to Philadelphia start from $642 round-trip. Over the 20 Finnair flights for this route in a normal week, average airfare is usually $767 round-trip - but some users have found much cheaper deals with momondo.

  • American Airlines Flights From London to Philadelphia

    Across 10,000 American Airlines reviews on momondo, the average score is 7.2/10. American Airlines flies from London to Philadelphia about 20 times each week, with ticket deals ranging from $592 to $780. Price data is based on momondo 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
Avalon
Lewes
Stone Harbor
Vineland
Essington
Pottstown
New Castle
West Chester

Why use momondo?

Why should I use momondo to find a flight deal from London to Philadelphia?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Philadelphia from London.

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?

Once you have performed a search for London to Philadelphia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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