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Cheap flights from Philadelphia to London from $184

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 2/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Scandinavian Airlines Logo
2:30 pm - 9:40 pmPHL-LHR
26h 10m2 stops
Scandinavian Airlines Logo
7:05 am - 10:50 pmLHR-PHL
20h 45m3 stops
$631Scandinavian Airlines
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Mon, Jan 19 - Fri, Jan 23
Multiple Airlines Logo
7:50 am - 8:00 pmPHL-STN
32h 10m3 stops
Multiple Airlines Logo
4:45 pm - 5:05 pmSTN-PHL
28h 20m2 stops
$631Multiple Airlines
Find Deal
Mon, Mar 16 - Mon, Mar 23
Scandinavian Airlines Logo
6:02 am - 12:55 pmPHL-LHR
25h 53m3 stops
Scandinavian Airlines Logo
6:40 am - 9:16 pmLHR-PHL
19h 36m3 stops
$632Scandinavian Airlines
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Sun, Jan 11 - Tue, Jan 20
Multiple Airlines Logo
3:54 pm - 10:00 amPHL-LGW
13h 06m1 stop
Multiple Airlines Logo
2:00 pm - 3:41 pmLGW-PHL
30h 41m2 stops
$632Multiple Airlines
Find Deal
Thu, Jan 29 - Mon, Feb 2
JetBlue Logo
1:30 pm - 6:55 amPHL-LHR
12h 25m1 stop
JetBlue Logo
9:20 am - 6:23 pmLHR-PHL
14h 03m1 stop
$634JetBlue
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Thu, Jan 22 - Thu, Jan 29
JetBlue Logo
6:00 am - 6:55 amPHL-LHR
20h 55m1 stop
JetBlue Logo
9:20 am - 9:47 pmLHR-PHL
16h 27m1 stop
$635JetBlue
Find Deal
Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
5:40 pm - 2:15 pmPHL-LTN
15h 35m2 stops
Multiple Airlines Logo
8:50 pm - 2:47 pmLTN-PHL
22h 57m3 stops
$636Multiple Airlines
Find Deal
Sun, Jan 11 - Tue, Jan 20
Lufthansa Logo
5:35 pm - 6:35 pmPHL-LCY
20h 00m1 stop
Lufthansa Logo
9:15 am - 4:00 pmLCY-PHL
11h 45m1 stop
$746Lufthansa
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Tue, Apr 28 - Thu, May 7
SWISS Logo
1:10 pm - 12:55 pmPHL-LCY
18h 45m2 stops
SWISS Logo
9:20 am - 9:38 pmLCY-PHL
17h 18m2 stops
$747SWISS
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Wed, Feb 11 - Wed, Feb 25
Lufthansa Logo
5:35 pm - 6:35 pmPHL-LCY
20h 00m1 stop
Lufthansa Logo
9:15 am - 4:00 pmLCY-PHL
11h 45m1 stop
$768Lufthansa
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Wed, May 13 - Thu, Oct 15

JetBlue flights from Philadelphia to London

Our best JetBlue deals on Philadelphia to London flight tickets
JetBlue
Jan 22
PHL1:30 pmPhiladelphia
12h 25m
1 stop
LHR6:55 amLondon Heathrow
Jan 29
LHR9:20 amLondon Heathrow
14h 03m
1 stop
PHL6:23 pmPhiladelphia
$634
Find similar
JetBlue
Mar 16
PHL6:00 amPhiladelphia
20h 55m
1 stop
LHR6:55 amLondon Heathrow
Mar 23
LHR9:20 amLondon Heathrow
16h 27m
1 stop
PHL9:47 pmPhiladelphia
$635
Find similar
JetBlue
Feb 4
PHL8:40 amPhiladelphia
17h 15m
1 stop
LHR6:55 amLondon Heathrow
Feb 25
LHR9:20 amLondon Heathrow
18h 25m
1 stop
PHL10:45 pmPhiladelphia
$649
Find similar

Icelandair flights from Philadelphia to London

Our best Icelandair deals on Philadelphia to London flight tickets
Icelandair
Dec 5
PHL6:00 amPhiladelphia
19h 55m
1 stop
LHR6:55 amLondon Heathrow
Dec 10
LHR9:20 amLondon Heathrow
29h 19m
1 stop
PHL9:39 amPhiladelphia
$658
Find similar
Icelandair
Dec 5
PHL6:00 amPhiladelphia
19h 55m
1 stop
LHR6:55 amLondon Heathrow
Dec 10
LHR9:20 amLondon Heathrow
29h 19m
1 stop
PHL9:39 amPhiladelphia
$672
Find similar
Icelandair
Nov 26
PHL8:25 amPhiladelphia
21h 25m
2 stops
LHR10:50 amLondon Heathrow
Dec 3
LHR8:35 pmLondon Heathrow
24h 02m
2 stops
PHL3:37 pmPhiladelphia
$794
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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 24, 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 - LHR

PHLLHR

Philadelphia

Mon 1/19

2:30 pm-9:40 pm

2 stops26h 10m

London Heathrow

Fri 1/23

7:05 am-10:50 pm

3 stops20h 45m

$631

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Mon 3/16

7:50 am-8:00 pm

3 stops32h 10m

London Stansted

Mon 3/23

4:45 pm-5:05 pm

2 stops28h 20m

$631

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 1/11

6:02 am-12:55 pm

3 stops25h 53m

London Heathrow

Tue 1/20

6:40 am-9:16 pm

3 stops19h 36m

$632

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Thu 1/29

3:54 pm-10:00 am

1 stop13h 06m

London Gatwick

Mon 2/2

2:00 pm-3:41 pm

2 stops30h 41m

$632

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 1/22

1:30 pm-6:55 am

1 stop12h 25m

London Heathrow

Thu 1/29

9:20 am-6:23 pm

1 stop14h 03m

$634

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 3/16

6:00 am-6:55 am

1 stop20h 55m

London Heathrow

Mon 3/23

9:20 am-9:47 pm

1 stop16h 27m

$635

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Sun 1/11

5:40 pm-2:15 pm

2 stops15h 35m

London Luton

Tue 1/20

8:50 pm-2:47 pm

3 stops22h 57m

$636

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Tue 4/28

5:35 pm-6:35 pm

1 stop20h 00m

London City

Thu 5/7

9:15 am-4:00 pm

1 stop11h 45m

$746

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Wed 2/11

1:10 pm-12:55 pm

2 stops18h 45m

London City

Wed 2/25

9:20 am-9:38 pm

2 stops17h 18m

$747

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Wed 5/13

5:35 pm-6:35 pm

1 stop20h 00m

London City

Thu 10/15

9:15 am-4:00 pm

1 stop11h 45m

$768

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 $648, 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 $814 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 $696 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 8% cheaper 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

6h 59m

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 6h 59m
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
JetBluePriceFrom $503Free CancellationRating
7.2
2,903 reviews
Search JetBlue flights
American AirlinesPriceFrom $505Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
British AirwaysPriceFrom $509Free CancellationRating
6.7
7,537 reviews
Search British Airways flights
FinnairPriceFrom $514Free CancellationRating
7.6
1,334 reviews
Search Finnair flights
Aer LingusPriceFrom $523Free CancellationRating
7.2
1,381 reviews
Search Aer Lingus flights
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,044 reviews
Search United Airlines flights
IberiaPriceFrom $583Free CancellationRating
7.0
3,033 reviews
Search Iberia flights

  • Finnair Flights From Philadelphia to London

    Finnair operates around 14 flights from Philadelphia to London every week. The average price of these flights found in the last 72 hours has been $775, 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 1,334 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 $845, however, with flight time and availability significantly affecting the price. American Airlines (7.2/10 from 11,040 user reviews) flies into London from Philadelphia 14 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
Wembley
Folkestone
Romford
Ilford
Cobham
Stansted
Harrow
Watford

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