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Cheap flights from Philadelphia to London from £241

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
11 Sep — 18 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Philadelphia to London are usually found in November or January, booked 88 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Cheap flight deals from Philadelphia to London

Enter your travel dates to find the best prices.

Cheapest flights from Philadelphia to London
Explore the most affordable flight options available from Philadelphia to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 August 2026.

Thu 1/1015:30 -
1 stop13h 30m
Sat 10/1014:00 -
1 stop15h 20m
Deal found 11/8£619
Tue 8/916:20 -
2 stops24h 00m
Tue 15/920:00 -
2 stops24h 41m
Deal found 11/8£622
Wed 19/813:00 -
1 stop16h 00m
Wed 9/914:00 -
1 stop15h 09m
Deal found 10/8£622
Sat 5/916:45 -
2 stops32h 35m
Sat 12/914:00 -
1 stop15h 09m
Deal found 10/8£623
Tue 18/807:20 -
1 stop21h 40m
Fri 28/814:00 -
1 stop14h 59m
Deal found 11/8£624
Sun 15/1117:05 -
2 stops58h 15m
Thu 19/1106:00 -
2 stops15h 05m
Deal found 10/8£625
Tue 18/807:25 -
2 stops21h 35m
Mon 7/914:00 -
1 stop23h 51m
Deal found 10/8£625
Thu 13/808:00 -
2 stops21h 00m
Sun 30/814:00 -
1 stop24h 35m
Deal found 11/8£626
Sun 25/1018:30 -
1 stop23h 40m
Sat 31/1017:00 -
2 stops28h 00m
Deal found 12/8£626
Sun 18/1009:10 -
2 stops19h 50m
Sat 24/1014:00 -
1 stop15h 20m
Deal found 10/8£626
Sat 15/807:20 -
2 stops21h 40m
Fri 28/814:00 -
1 stop14h 59m
Deal found 11/8£628
Sun 30/813:00 -
1 stop16h 00m
Fri 11/914:00 -
1 stop15h 09m
Deal found 10/8£629

Find flight deals from Philadelphia to London

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 August 2026.

Round-trip from

£619

One-way from

£241

Popular in

June

Cheapest in

November

Average price

£725

Good round-trip deal

£933 or less

Good one-way deal

£923 or less
1/10-10/10
  • 1/10-10/10
  • 2 total stops
  • 28h 50m total
  • Philadelphia to London
Search Deals
JetBlue
  • JetBlue
  • 15/10
  • 1 total stop
  • 19h 30m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (£183 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Philadelphia to London (LON).
Search Deals
Price to beat on a one-way flight from Philadelphia to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise 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, Cheapflights users made 858,174 searches. Data last updated 12 August 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

Cheapest return flight

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 6/10

14:32-11:20

1 stop15h 48m

London Heathrow

Tue 27/10

06:30-19:08

2 stops16h 38m

£641

PhiladelphiaLondon

PHL Philadelphia - LTN London Luton

PHLLTN

Philadelphia

Tue 22/9

20:25-13:25

1 stop12h 00m

London Luton

Wed 30/9

06:15-18:55

1 stop17h 40m

£673

PhiladelphiaLondon

PHL Philadelphia - LTN London Luton

PHLLTN

Philadelphia

Wed 9/9

17:40-23:10

2 stops24h 30m

London Luton

Sun 13/9

17:05-16:05

3 stops28h 00m

£673

PhiladelphiaLondon

PHL Philadelphia - STN London Stansted

PHLSTN

Philadelphia

Fri 6/11

17:30-07:50

1 stop9h 20m

London Stansted

Sat 14/11

06:30-17:40

1 stop16h 10m

£673
Fastest return journey

PhiladelphiaLondon

PHL Philadelphia - LCY London City

PHLLCY

Philadelphia

Tue 1/12

21:10-12:40

1 stop10h 30m

London City

Thu 10/12

06:50-14:05

1 stop12h 15m

£683

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Thu 29/10

12:15-06:25

1 stop14h 10m

London Heathrow

Sat 7/11

08:40-23:08

2 stops19h 28m

£686

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Thu 15/10

19:16-13:05

1 stop12h 49m

London Heathrow

Sun 25/10

06:30-22:07

2 stops19h 37m

£686

PhiladelphiaLondon

PHL Philadelphia - STN London Stansted

PHLSTN

Philadelphia

Thu 15/10

10:05-15:00

2 stops23h 55m

London Stansted

Mon 19/10

05:55-21:32

2 stops20h 37m

£691

PhiladelphiaLondon

PHL Philadelphia - LCY London City

PHLLCY

Philadelphia

Mon 16/11

21:10-12:40

1 stop10h 30m

London City

Fri 20/11

06:50-14:05

1 stop12h 15m

£694

PhiladelphiaLondon

PHL Philadelphia - LTN London Luton

PHLLTN

Philadelphia

Mon 7/9

20:25-15:45

1 stop14h 20m

London Luton

Mon 14/9

12:25-18:55

1 stop11h 30m

£708

Flights are sorted by cheapest return flights first.

Deals found on 11/8

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Philadelphia to London

Have a flexible travel schedule? Discover the best time to fly to London from Philadelphia with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to London

What is the cheapest month to book a flight from Philadelphia to London?

Currently, January is the cheapest month in which you can book a flight from Philadelphia to London (average of £535). Flying from Philadelphia to London in June is currently the most expensive (average of £1,097). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to LON?

Find hourly flight availability from Philadelphia to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 August 2026.

When flying from Philadelphia to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Philadelphia to London

Explore weekly flight availability from Philadelphia to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 12 August 2026.

The most flights from PHL to LON are scheduled on a Monday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (15 on average).

How much does it cost for a return flight from Philadelphia to London?

Airfare is typical for this route at the moment.
Philadelphia to London flights typically cost between £535 and £843 in October.
The cheapest return price found within the last 5 days was £619 on Multiple Airlines (1 Oct–10 Oct).

What’s the top stopover airport for flights from Philadelphia to London?

Share of one-stop return flights from Philadelphia to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Boston (BOS) – chosen by Cheapflights users on 73% of one-stop itineraries from Philadelphia to London on Cheapflights.

What’s the cheapest stopover airport for flights from Philadelphia to London?

Average return fare for one-stop flights from Philadelphia to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £393.

What’s the fastest stopover option from Philadelphia to London?

Shortest average travel time for one-stop one-way flights from Philadelphia to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 10h 05m.

Which airport typically offers the quickest stopover for flights from Philadelphia to London?

Average stopover duration for one-stop one-way flights from Philadelphia to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 1h 54m.

How far ahead should I book a flight from Philadelphia to London?

The price you pay for your flight from Philadelphia to London may vary depending on when you book. For the best chance of a lower fare, look to book 13 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 12 August 2026.
Read reviews from past customers who have flown with American Airlines,JetBlue, andIberia from Philadelphia to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,918 reviews
Check prices

Crew

7.9

Comfort

7.2

Overall

7.1

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
American Airlines
7.1
Good
11,918 reviews
American Airlines
7.1
Good
11,918 reviews
Check prices

Crew

7.9

Comfort

7.2

Overall

7.1

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
JetBlue
7.1
Good
3,035 reviews
American Airlines
7.1
Good
11,918 reviews
Check prices

Crew

7.9

Comfort

7.2

Overall

7.1

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
Iberia
7.0
Good
3,262 reviews
American Airlines
7.1
Good
11,918 reviews
Check prices

Crew

7.9

Comfort

7.2

Overall

7.1

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
British Airways
6.7
Okay
8,161 reviews
American Airlines
7.1
Good
11,918 reviews
Check prices

Crew

7.9

Comfort

7.2

Overall

7.1

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Philadelphia to London?

    Located just 7.0 mi from the city center, Philadelphia is the airport most travelers will use when flying to London from Philadelphia. Booking flights from Philadelphia (PHL) to London should be relatively easy as there are 15 daily outbound flights to London from 2 different airlines.

  • How long is the flight from Philadelphia to London?

    For as low as £641, Delta can have you in London from Philadelphia in 15h 48m. There are 3533 mi between Philadelphia and London. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Philadelphia to London round-trip?

    Flying on British Airways is currently your cheapest option to London, with prices starting at £423. Another option worth looking into is American Airlines, starting at £519 return. British Airways is currently priced 37% below the average price you’ll pay for this route.

  • What are the most popular routes from Philadelphia to London?

    The most popular route from Philadelphia to London is Philadelphia - London Heathrow. You may also consider Philadelphia - London Gatwick or Philadelphia - London City.

  • What are the most reliable airlines from Philadelphia to London?

    Consider Malaysia Airlines (73%), American Airlines (73%) or Finnair (73%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London.

  • What are the cheapest flights from Philadelphia to London?

    Looking for the cheapest flight from Philadelphia to London? While on average our users pay £985, our data indicates the cheapest price to be £545. The most popular route (Philadelphia - London Heathrow), is priced around £588.

  • Can I find deals for flights from Philadelphia to London that include hotel bookings?

    Yes. In addition to deals on Philadelphia to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to London.

  • Can I find deals for business class flights from Philadelphia to London?

    Yes. Cheapflights offers flight deals from Philadelphia to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to London?

    Currently, January is the cheapest month in which you can book a flight from Philadelphia to London (average of £535). Flying from Philadelphia to London in June is currently the most expensive (average of £1,097). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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Milton Keynes
Luton
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Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Philadelphia to London

Discover the top 2 airlines that operate flights from Philadelphia to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 August 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£423Average£767FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£519Average£799FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Philadelphia to London?

Cheapflights makes it easy to find Philadelphia to London flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to London?

Cheapflights simply makes it quick and affordable to book flights from Philadelphia to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Philadelphia to London with no change fees?

Certainly. Search results for flights to London from Philadelphia shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Philadelphia to London become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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