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Cheap flights from Philadelphia to London from $220

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to London departing on 1/12. 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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Multiple Airlines Logo
3:30 pm - 6:20 pmPHL-STN
21h 50m3 stops
Multiple Airlines Logo
5:00 pm - 2:50 pmSTN-PHL
26h 50m3 stops
$561Multiple Airlines
Find Deal
Mon, Dec 1 - Mon, Dec 8
Multiple Airlines Logo
3:30 pm - 5:20 pmPHL-LGW
20h 50m3 stops
Multiple Airlines Logo
9:30 pm - 2:50 pmLGW-PHL
22h 20m3 stops
$561Multiple Airlines
Find Deal
Mon, Dec 1 - Mon, Dec 8
JetBlue Logo
8:40 am - 6:55 amPHL-LHR
17h 15m1 stop
JetBlue Logo
9:20 am - 6:23 pmLHR-PHL
14h 03m1 stop
$596JetBlue
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Sat, Jan 31 - Mon, Feb 9
American Airlines Logo
7:45 pm - 7:50 amPHL-LHR
7h 05mnonstop
American Airlines Logo
7:50 am - 1:55 pmLHR-PHL
11h 05m1 stop
$601American Airlines
Find Deal
Tue, Nov 18 - Tue, Nov 25
American Airlines Logo
9:15 pm - 2:35 pmPHL-LHR
12h 20m1 stop
American Airlines Logo
7:50 am - 1:55 pmLHR-PHL
11h 05m1 stop
$605American Airlines
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Tue, Nov 18 - Tue, Nov 25
British Airways Logo
3:35 pm - 7:00 amPHL-LHR
10h 25m1 stop
British Airways Logo
6:30 am - 2:05 pmLHR-PHL
12h 35m1 stop
$609British Airways
Find Deal
Wed, Jan 7 - Fri, Jan 16
JetBlue Logo
10:24 am - 6:55 amPHL-LHR
15h 31m1 stop
JetBlue Logo
9:20 am - 6:23 pmLHR-PHL
14h 03m1 stop
$612JetBlue
Find Deal
Wed, Dec 10 - Sun, Feb 8
British Airways Logo
7:45 pm - 7:50 amPHL-LHR
7h 05mnonstop
British Airways Logo
10:15 am - 1:25 pmLHR-PHL
8h 10mnonstop
$626British Airways
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Tue, Nov 18 - Tue, Nov 25
Iberia Logo
7:55 pm - 2:05 pmPHL-LCY
13h 10m1 stop
Iberia Logo
7:50 am - 3:30 pmLCY-PHL
12h 40m1 stop
$675Iberia
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Wed, Dec 3 - Wed, Dec 10
Iberia Logo
4:05 pm - 2:05 pmPHL-LCY
17h 00m2 stops
Iberia Logo
7:50 am - 3:30 pmLCY-PHL
12h 40m1 stop
$680Iberia
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Wed, Dec 3 - Wed, Dec 10

British Airways flights from Philadelphia to London

Our best British Airways deals on Philadelphia to London flight tickets
British Airways
Jan 7
PHL3:35 pmPhiladelphia
10h 25m
1 stop
LHR7:00 amLondon Heathrow
Jan 16
LHR6:30 amLondon Heathrow
12h 35m
1 stop
PHL2:05 pmPhiladelphia
$609
Find similar
British Airways
Nov 18
PHL7:45 pmPhiladelphia
7h 05m
LHR7:50 amLondon Heathrow
Nov 25
LHR10:15 amLondon Heathrow
8h 10m
PHL1:25 pmPhiladelphia
$626
Find similar
British Airways
Nov 19
PHL3:58 pmPhiladelphia
10h 02m
1 stop
LHR7:00 amLondon Heathrow
Nov 26
LHR1:10 pmLondon Heathrow
8h 05m
PHL4:15 pmPhiladelphia
$631
Find similar

SWISS flights from Philadelphia to London

Our best SWISS deals on Philadelphia to London flight tickets
SWISS
Feb 4
PHL1:10 pmPhiladelphia
25h 05m
2 stops
LHR7:15 pmLondon Heathrow
Feb 9
LHR6:40 pmLondon Heathrow
32h 11m
2 stops
PHL9:51 pmPhiladelphia
$636
Find similar
SWISS
Dec 8
PHL1:15 pmPhiladelphia
18h 40m
2 stops
LCY12:55 pmLondon City
Dec 15
LCY7:10 pmLondon City
31h 00m
2 stops
PHL9:10 pmPhiladelphia
$652
Find similar
SWISS
Nov 13
PHL12:40 pmPhiladelphia
38h 20m
2 stops
LCY8:00 amLondon City
Nov 17
LCY7:10 pmLondon City
31h 11m
2 stops
PHL9:21 pmPhiladelphia
$702
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to London 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 November 3, 2025.
Use the filters below to find and compare flights from Philadelphia to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Mon 12/1

3:30 pm-6:20 pm

3 stops21h 50m

London Stansted

Mon 12/8

5:00 pm-2:50 pm

3 stops26h 50m

$561

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Mon 12/1

3:30 pm-5:20 pm

3 stops20h 50m

London Gatwick

Mon 12/8

9:30 pm-2:50 pm

3 stops22h 20m

$561

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 1/31

8:40 am-6:55 am

1 stop17h 15m

London Heathrow

Mon 2/9

9:20 am-6:23 pm

1 stop14h 03m

$596

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 11/18

7:45 pm-7:50 am

Nonstop7h 05m

London Heathrow

Tue 11/25

7:50 am-1:55 pm

1 stop11h 05m

$601

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 11/18

9:15 pm-2:35 pm

1 stop12h 20m

London Heathrow

Tue 11/25

7:50 am-1:55 pm

1 stop11h 05m

$605

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 1/7

3:35 pm-7:00 am

1 stop10h 25m

London Heathrow

Fri 1/16

6:30 am-2:05 pm

1 stop12h 35m

$609

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 12/10

10:24 am-6:55 am

1 stop15h 31m

London Heathrow

Sun 2/8

9:20 am-6:23 pm

1 stop14h 03m

$612

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 11/18

7:45 pm-7:50 am

Nonstop7h 05m

London Heathrow

Tue 11/25

10:15 am-1:25 pm

Nonstop8h 10m

$626

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Wed 12/3

7:55 pm-2:05 pm

1 stop13h 10m

London City

Wed 12/10

7:50 am-3:30 pm

1 stop12h 40m

$675

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Wed 12/3

4:05 pm-2:05 pm

2 stops17h 00m

London City

Wed 12/10

7:50 am-3:30 pm

1 stop12h 40m

$680

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 London from

How to get the cheapest flight ticket from Philadelphia to London

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 London?

The cheapest month to fly to London from Philadelphia is in September. Flight prices, which tend to average around $649, are often lower during this time because this is during the off-season. The month of August is another great option to travel to London, with average flight prices from Philadelphia averaging around $659.

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

The cheapest day to depart from Philadelphia to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $776. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $988. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from Philadelphia at noon is the least expensive time of day to depart. momondo users have found prices as low as $764 when looking at flights departing at noon. Flights to London are more costly in the afternoon, with an average ticket price of $879. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Philadelphia to London flight route?

Fly from Philadelphia to London Heathrow for the best Philadelphia - London flight prices

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $817 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Philadelphia for as low as $705 on momondo.

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

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

You could potentially save up to 15% on your flight if you consider stops on a Philadelphia to London flight.

How have Philadelphia to London flight prices changed over time?

As of November 2025, prices for Philadelphia to London flights are approximately 5% more expensive when compared to flights at the same time last year.

When to book flights from Philadelphia to London

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

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

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

Best Price Found

$462

Fastest flight time

7h 00m

Direct flights

Every day

Airports in London

1 airport
The best one-way flight to London from Philadelphia in the past 72 hours is $462. The best round-trip flight deal from Philadelphia to London found on momondo in the last 72 hours is $727.
The fastest flight from Philadelphia to London takes 7h 00m
Direct flights go from Philadelphia to London every day.
There is 1 airport near London: London Heathrow (LHR)
Search flight deals

  • How far is Philadelphia to London by plane?

    A flight from Philadelphia to London will travel around 3538.9 mi. Typically, this will take 7h 00m by plane in normal conditions.

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

    Prices for flights from Philadelphia Airport to London refresh daily.

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

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

    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 Philadelphia Airport to London.

  • What documentation or ID do you need to fly to London?

    The required travel and health documents for your London 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 London. 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 Philadelphia to London?

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

Best airlines flying from Philadelphia to London

Compare and see reviews for airlines that fly from Philadelphia to London with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $505Free CancellationRating
7.2
11,036 reviews
Search American Airlines flights
British AirwaysPriceFrom $509Free CancellationRating
6.7
7,494 reviews
Search British Airways flights
FinnairPriceFrom $514Free CancellationRating
7.6
1,335 reviews
Search Finnair flights
Aer LingusPriceFrom $523Free CancellationRating
7.2
1,365 reviews
Search Aer Lingus flights
JetBluePriceFrom $550Free CancellationRating
7.2
2,907 reviews
Search JetBlue flights
United AirlinesPriceFrom $560Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
IberiaPriceFrom $584Free CancellationRating
7.0
3,005 reviews
Search Iberia flights

  • Finnair Flights From Philadelphia to London

    Finnair operates around 9 flights from Philadelphia to London every week. The average price of these flights found in the last 72 hours has been $776, but momondo users have found Finnair deals from Philadelphia to London from as low as $514 round-trip. Finnair has been scored 7.6/10 in 1,335 reviews.

  • American Airlines Flights From Philadelphia to London

    $505 is the best American Airlines flight deal from Philadelphia to London found on momondo over the last 72 hours. The average American Airlines ticket price found was closer to $844, however, with flight time and availability significantly affecting the price. American Airlines (7.2/10 from 11,036 user reviews) flies into London from Philadelphia 9 times in an average week so prices can vary.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Brentwood
Chelmsford
Folkestone
Romford
Ilford
Cobham
Wembley
Stansted
Watford
Harrow

Why use momondo?

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

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 London from Philadelphia.

Can I find flights from Philadelphia to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Philadelphia to London flights to just show those with flexible booking policies.

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

Once you have performed a search for Philadelphia to London 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 Philadelphia to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Philadelphia 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 London 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.
Start using Trips
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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport