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Cheap flights from Philadelphia to London from $225

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 4/8. 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

KAYAK's recommended round-trip deals from the most popular airlines that fly from Philadelphia to London.
 Logo
2:18 pm - 6:55 amPHL-LGW
35h 37m1 stop
 Logo
10:00 am - 12:26 amLGW-PHL
19h 26m1 stop
Thu, May 1 - Tue, May 6
 Logo
5:35 pm - 6:55 amPHL-LGW
32h 20m1 stop
 Logo
10:00 am - 1:41 pmLGW-PHL
32h 41m1 stop
Thu, May 1 - Thu, May 8
Iberia Logo
7:50 pm - 8:05 amPHL-LHR
7h 15mnonstop
Iberia Logo
1:30 pm - 4:25 pmLHR-PHL
7h 55mnonstop
$566Iberia
Find Deal
Sun, Aug 10 - Thu, Aug 21
Iberia Logo
10:10 pm - 10:20 amPHL-LHR
7h 10mnonstop
Iberia Logo
10:05 am - 12:50 pmLHR-PHL
7h 45mnonstop
$572Iberia
Find Deal
Tue, May 6 - Wed, May 21
Aer Lingus Logo
8:30 pm - 11:10 amPHL-LHR
9h 40m1 stop
Aer Lingus Logo
1:25 pm - 7:00 pmLHR-PHL
10h 35m1 stop
$586Aer Lingus
Find Deal
Mon, Apr 28 - Wed, May 7
British Airways Logo
4:00 pm - 10:40 amPHL-LGW
13h 40m1 stop
British Airways Logo
2:30 pm - 8:35 amLGW-PHL
23h 05m1 stop
$601British Airways
Find Deal
Wed, May 7 - Tue, May 13
American Airlines Logo
3:37 pm - 7:40 amPHL-LHR
11h 03m1 stop
American Airlines Logo
7:50 am - 3:50 pmLHR-PHL
13h 00m1 stop
$605American Airlines
Find Deal
Sun, Apr 27 - Wed, May 7
British Airways Logo
2:41 pm - 10:05 amPHL-LHR
14h 24m1 stop
British Airways Logo
7:50 am - 3:55 pmLHR-PHL
13h 05m1 stop
$609British Airways
Find Deal
Sun, Apr 20 - Wed, Apr 30
Aer Lingus Logo
8:30 pm - 11:10 amPHL-LHR
9h 40m1 stop
Aer Lingus Logo
12:00 pm - 7:00 pmLHR-PHL
12h 00m1 stop
$648Aer Lingus
Find Deal
Sun, Apr 27 - Thu, May 1
American Airlines Logo
1:40 pm - 8:10 amPHL-LGW
13h 30m2 stops
American Airlines Logo
10:40 am - 10:09 pmLGW-PHL
16h 29m1 stop
$651American Airlines
Find Deal
Fri, Sep 19 - Fri, Sep 26

British Airways flights from Philadelphia to London

Our best British Airways deals on Philadelphia to London flight tickets
British Airways
May 7
PHL4:00 pmPhiladelphia
13h 40m
1 stop
LGW10:40 amLondon Gatwick
May 13
LGW2:30 pmLondon Gatwick
23h 05m
1 stop
PHL8:35 amPhiladelphia
British Airways
Apr 8
PHL7:55 pmPhiladelphia
7h 10m
LHR8:05 amLondon Heathrow
Apr 14
LHR6:10 pmLondon Heathrow
22h 30m
1 stop
PHL11:40 amPhiladelphia
British Airways
Apr 8
PHL6:40 pmPhiladelphia
12h 50m
1 stop
LHR12:30 pmLondon Heathrow
Apr 14
LHR6:10 pmLondon Heathrow
22h 30m
1 stop
PHL11:40 amPhiladelphia

Air Canada flights from Philadelphia to London

Our best Air Canada deals on Philadelphia to London flight tickets
Air Canada
Apr 19
PHL3:30 pmPhiladelphia
24h 30m
2 stops
LHR9:00 pmLondon Heathrow
Apr 30
LHR9:30 amLondon Heathrow
10h 17m
1 stop
PHL2:47 pmPhiladelphia
Air Canada
Apr 8
PHL3:30 pmPhiladelphia
10h 00m
1 stop
LHR6:30 amLondon Heathrow
May 1
LHR9:30 amLondon Heathrow
10h 06m
1 stop
PHL2:36 pmPhiladelphia
Air Canada
Apr 28
PHL4:25 pmPhiladelphia
12h 35m
2 stops
LHR10:00 amLondon Heathrow
May 6
LHR12:05 pmLondon Heathrow
15h 01m
2 stops
PHL10:06 pmPhiladelphia

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 February. Flight prices, which tend to average around $669, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Philadelphia averaging around $693.

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 $833. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $983. 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 $905. 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 9 weeks ahead of your departure date. In general, you can expect to find flights to London for around $853 when searching 9 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 $775 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.

How have Philadelphia to London flight prices changed over time?

As of April 2025, prices for Philadelphia to London flights are approximately 1% 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

$225

Fastest flight time

6h 55m

Direct flights

Every day

Airports in London

3 airports
The best one-way flight to London from Philadelphia in the past 72 hours is $225. The best round-trip flight deal from Philadelphia to London found on momondo in the last 72 hours is $519.
The fastest flight from Philadelphia to London takes 6h 55m
Direct flights go from Philadelphia to London every day.
There are 3 airports near London: London Heathrow (LHR), London Stansted (STN), London Gatwick (LGW)

  • How far is Philadelphia to London by plane?

    A flight from Philadelphia to London will travel around 3538.9 mi. Typically, this will take 6h 55m 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 $467Free CancellationRating
7.3
2,920 reviews
Search JetBlue flights
Aer LingusPriceFrom $597Free CancellationRating
7.0
1,059 reviews
Search Aer Lingus flights
IberiaPriceFrom $618Free CancellationRating
7.0
2,659 reviews
Search Iberia flights
FinnairPriceFrom $626Free CancellationRating
7.6
1,267 reviews
Search Finnair flights
British AirwaysPriceFrom $633Free CancellationRating
6.6
6,718 reviews
Search British Airways flights
American AirlinesPriceFrom $647Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $673Free CancellationRating
7.4
8,619 reviews
Search United Airlines flights
LufthansaPriceFrom $768Free CancellationRating
6.7
6,964 reviews
Search Lufthansa flights
  • Finnair Flights From Philadelphia to London

    Finnair operates around 10 flights from Philadelphia to London every week. The average price of these flights found in the last 72 hours has been $826, but momondo users have found Finnair deals from Philadelphia to London from as low as $626 round-trip. Finnair has been scored 7.6/10 in 1,267 reviews.

  • American Airlines Flights From Philadelphia to London

    $647 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 $887, however, with flight time and availability significantly affecting the price. American Airlines (7.2/10 from 10,000 user reviews) flies into London from Philadelphia 10 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
Hounslow
Gatwick
Croydon
Luton
Guildford
Hayes
Slough
Dartford
Stansted
Ilford
Dover
Canterbury
Colchester
Milton Keynes
Horley
Wembley
Chelmsford
Eastbourne
Southend-on-Sea
Hook

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.


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1 adult
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To?
Wed 4/9
Wed 4/16

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