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Cheap flights from Philadelphia to London from $167

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 2/1. 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 Philadelphia to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
3:30 pm - 7:10 am
PHL
-
LHR
10h 40m
1 stop
Air Canada Logo
9:00 am - 10:46 pm
LHR
-
PHL
18h 46m
2 stops
$588Air Canada
Wed, Feb 4 - Wed, Feb 25
British Airways Logo
7:20 pm - 1:50 pm
PHL
-
LGW
13h 30m
1 stop
British Airways Logo
3:20 pm - 3:05 pm
LGW
-
PHL
27h 45m
1 stop
$588British Airways
Tue, Mar 3 - Mon, Mar 9
Iberia Logo
1:49 pm - 7:00 am
PHL
-
LHR
12h 11m
1 stop
Iberia Logo
8:50 pm - 2:05 pm
LHR
-
PHL
46h 15m
2 stops
$589Iberia
Sun, Feb 1 - Mon, Feb 9
Multiple Airlines Logo
8:25 pm - 3:25 pm
PHL
-
LTN
14h 00m
1 stop
Multiple Airlines Logo
9:05 am - 6:55 pm
LTN
-
PHL
14h 50m
1 stop
$589Multiple Airlines
Wed, Apr 29 - Sun, May 3
Multiple Airlines Logo
7:50 am - 6:40 pm
PHL
-
STN
29h 50m
3 stops
Multiple Airlines Logo
7:30 am - 10:46 pm
STN
-
PHL
20h 16m
3 stops
$589Multiple Airlines
Thu, Feb 5 - Tue, Feb 10
Multiple Airlines Logo
2:58 pm - 6:00 am
PHL
-
LGW
34h 02m
2 stops
Multiple Airlines Logo
2:00 pm - 9:59 am
LGW
-
PHL
24h 59m
1 stop
$589Multiple Airlines
Tue, Jan 27 - Thu, Jan 29
Multiple Airlines Logo
8:25 pm - 3:30 pm
PHL
-
LTN
14h 05m
1 stop
Multiple Airlines Logo
9:05 am - 6:55 pm
LTN
-
PHL
14h 50m
1 stop
$590Multiple Airlines
Tue, Apr 28 - Sun, May 3
British Airways Logo
7:50 pm - 7:50 am
PHL
-
LHR
7h 00mnonstop
British Airways Logo
10:15 am - 1:15 pm
LHR
-
PHL
8h 00mnonstop
$590British Airways
Wed, Feb 4 - Wed, Feb 25
American Airlines Logo
7:50 pm - 7:50 am
PHL
-
LHR
7h 00mnonstop
American Airlines Logo
10:15 am - 1:30 pm
LHR
-
PHL
8h 15mnonstop
$597American Airlines
Sun, Feb 1 - Tue, Feb 10
SWISS Logo
12:55 pm - 5:05 pm
PHL
-
LCY
23h 10m
2 stops
SWISS Logo
7:10 pm - 9:09 pm
LCY
-
PHL
30h 59m
2 stops
$636SWISS
Wed, Feb 18 - Mon, Feb 23

Air Canada flights from Philadelphia to London

Our best Air Canada deals on Philadelphia to London flight tickets
Air Canada
Mar 9
PHL3:30 pmPhiladelphia
25h 05m
2 stops
LHR8:35 pmLondon Heathrow
Mar 17
LHR9:00 amLondon Heathrow
17h 46m
2 stops
PHL10:46 pmPhiladelphia
$588
Air Canada
Feb 11
PHL10:30 amPhiladelphia
15h 40m
2 stops
LHR7:10 amLondon Heathrow
Feb 17
LHR9:00 amLondon Heathrow
18h 46m
2 stops
PHL10:46 pmPhiladelphia
$592
Air Canada
Feb 1
PHL3:30 pmPhiladelphia
14h 50m
2 stops
LHR11:20 amLondon Heathrow
Feb 10
LHR6:50 amLondon Heathrow
12h 57m
2 stops
PHL2:47 pmPhiladelphia
$594

Iberia flights from Philadelphia to London

Our best Iberia deals on Philadelphia to London flight tickets
Iberia
Feb 1
PHL1:49 pmPhiladelphia
12h 11m
1 stop
LHR7:00 amLondon Heathrow
Feb 9
LHR8:50 pmLondon Heathrow
46h 15m
2 stops
PHL2:05 pmPhiladelphia
$589
Iberia
Jan 28
PHL1:49 pmPhiladelphia
12h 11m
1 stop
LHR7:00 amLondon Heathrow
Feb 2
LHR7:40 pmLondon Heathrow
28h 47m
2 stops
PHL7:27 pmPhiladelphia
$591
Iberia
Jan 25
PHL1:49 pmPhiladelphia
12h 11m
1 stop
LHR7:00 amLondon Heathrow
Feb 3
LHR10:15 amLondon Heathrow
8h 15m
PHL1:30 pmPhiladelphia
$597

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 January 21, 2026.
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

Wed 2/4

3:30 pm-7:10 am

1 stop10h 40m

London Heathrow

Wed 2/25

9:00 am-10:46 pm

2 stops18h 46m

$588

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Tue 3/3

7:20 pm-1:50 pm

1 stop13h 30m

London Gatwick

Mon 3/9

3:20 pm-3:05 pm

1 stop27h 45m

$588

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 2/1

1:49 pm-7:00 am

1 stop12h 11m

London Heathrow

Mon 2/9

8:50 pm-2:05 pm

2 stops46h 15m

$589

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Wed 4/29

8:25 pm-3:25 pm

1 stop14h 00m

London Luton

Sun 5/3

9:05 am-6:55 pm

1 stop14h 50m

$589

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Thu 2/5

7:50 am-6:40 pm

3 stops29h 50m

London Stansted

Tue 2/10

7:30 am-10:46 pm

3 stops20h 16m

$589

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Tue 1/27

2:58 pm-6:00 am

2 stops34h 02m

London Gatwick

Thu 1/29

2:00 pm-9:59 am

1 stop24h 59m

$589

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Tue 4/28

8:25 pm-3:30 pm

1 stop14h 05m

London Luton

Sun 5/3

9:05 am-6:55 pm

1 stop14h 50m

$590

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 2/4

7:50 pm-7:50 am

Nonstop7h 00m

London Heathrow

Wed 2/25

10:15 am-1:15 pm

Nonstop8h 00m

$590

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 2/1

7:50 pm-7:50 am

Nonstop7h 00m

London Heathrow

Tue 2/10

10:15 am-1:30 pm

Nonstop8h 15m

$597

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Wed 2/18

12:55 pm-5:05 pm

2 stops23h 10m

London City

Mon 2/23

7:10 pm-9:09 pm

2 stops30h 59m

$636

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 November is another great option to travel to London, with average flight prices from Philadelphia averaging around $663.

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 $768. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $987. 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 in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $851 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $873. Departure times in the evening 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 $825 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 $691 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 7% 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 January 2026, prices for Philadelphia to London flights are approximately 95% 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

$356

Fastest flight time

7h 00m

Direct flights

Every day

Airports in London

6 airports
The best one-way flight to London from Philadelphia in the past 72 hours is $356. The best round-trip flight deal from Philadelphia to London found on momondo in the last 72 hours is $681.
The fastest flight from Philadelphia to London takes 7h 00m
Direct flights go from Philadelphia to London every day.
There are 6 airports in London. From Philadelphia there are direct flights to 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 $506Free CancellationRating
7.2
11,169 reviews
Search American Airlines flights
British AirwaysPriceFrom $507Free CancellationRating
6.7
7,690 reviews
Search British Airways flights
FinnairPriceFrom $515Free CancellationRating
7.6
1,353 reviews
Search Finnair flights
Aer LingusPriceFrom $522Free CancellationRating
7.2
1,437 reviews
Search Aer Lingus flights
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,188 reviews
Search United Airlines flights
JetBluePriceFrom $580Free CancellationRating
7.2
2,890 reviews
Search JetBlue flights
IberiaPriceFrom $595Free CancellationRating
7.0
3,094 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 $780, but momondo users have found Finnair deals from Philadelphia to London from as low as $515 round-trip. Finnair has been scored 7.6/10 in 1,353 reviews.

  • American Airlines Flights From Philadelphia to London

    $506 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 $836, however, with flight time and availability significantly affecting the price. American Airlines (7.2/10 from 11,169 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
Luton
Milton Keynes
Dover
Slough
Guildford
Wembley
Crawley
Dartford
Hayes
Brentwood
Watford
Cobham
Folkestone
Romford
Stansted
Harrow
Croydon
Richmond

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