Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Philadelphia to London from £244

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
28 Aug — 4 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Philadelphia to London are usually found in September or November, booked 54 days in advance, depart on a Saturday or Monday 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 29 July 2026.

Sun 1/1121:10
PHL
-
LHR
1 stop10h 10m
Multiple Airlines
Fri 6/1106:30
LHR
-
PHL
1 stop12h 35m
Multiple Airlines
Deal found 26/7£670
Sun 6/920:25
PHL
-
STN
1 stop22h 00m
Multiple Airlines
Tue 15/906:30
STN
-
PHL
2 stops17h 25m
Multiple Airlines
Deal found 24/7£670
Sat 22/820:55
PHL
-
LHR
1 stop28h 35m
JetBlue
Sat 29/808:40
LHR
-
PHL
1 stop16h 21m
JetBlue
Deal found 26/7£671
Sat 29/809:00
PHL
-
LGW
1 stop19h 35m
JetBlue
Sun 30/812:20
LGW
-
PHL
1 stop25h 02m
JetBlue
Deal found 26/7£671
Thu 17/918:48
PHL
-
LHR
1 stop30h 42m
JetBlue
Tue 29/908:40
LHR
-
PHL
1 stop29h 51m
JetBlue
Deal found 26/7£672
Tue 8/909:12
PHL
-
LHR
1 stop16h 18m
JetBlue
Sat 19/908:40
LHR
-
PHL
1 stop11h 22m
JetBlue
Deal found 24/7£672
Mon 9/1110:30
PHL
-
LHR
1 stop15h 25m
JetBlue
Wed 11/1109:20
LHR
-
PHL
1 stop13h 12m
JetBlue
Deal found 23/7£673
Sun 1/1118:35
PHL
-
LHR
Nonstop7h 00m
British Airways
Fri 6/1106:30
LHR
-
PHL
1 stop12h 35m
British Airways
Deal found 26/7£674
Mon 24/820:25
PHL
-
LTN
1 stop11h 20m
Multiple Airlines
Tue 1/909:40
LTN
-
PHL
1 stop14h 15m
Multiple Airlines
Deal found 27/7£674
Fri 23/1010:05
PHL
-
LGW
2 stops28h 10m
Multiple Airlines
Wed 4/1115:25
LGW
-
PHL
3 stops29h 40m
Multiple Airlines
Deal found 24/7£674
Sun 23/820:55
PHL
-
LHR
1 stop28h 35m
JetBlue
Thu 27/808:40
LHR
-
PHL
1 stop16h 21m
JetBlue
Deal found 28/7£675
Tue 8/916:35
PHL
-
LGW
2 stops21h 40m
Multiple Airlines
Sat 12/914:00
LGW
-
PHL
1 stop15h 09m
Multiple Airlines
Deal found 28/7£675

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 29 July 2026.

Round-trip from

£666

One-way from

£244

Popular in

June

Cheapest in

September

Average price

£942

Good round-trip deal

£958 or less

Good one-way deal

£574 or less
JetBlue
  • JetBlue
  • 6/10-27/10
  • 2 total stops
  • 31h 42m total
  • Philadelphia to London
Search Deals
JetBlue
  • JetBlue
  • 8/9
  • 1 total stop
  • 16h 18m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 27% potential increase in price (£193 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£31 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 29 July 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 - LHR

PHLLHR

Philadelphia

Mon 9/11

10:30-06:55

1 stop15h 25m

London Heathrow

Wed 11/11

09:20-17:32

1 stop13h 12m

£672

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Wed 7/10

16:20-19:30

2 stops22h 10m

London Stansted

Thu 15/10

06:30-15:41

2 stops14h 11m

£692

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 27/8

09:12-06:30

1 stop16h 18m

London Heathrow

Sun 30/8

08:40-20:01

1 stop16h 21m

£699
Fastest return journey

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 23/11

18:35-06:35

Nonstop7h 00m

London Heathrow

Thu 10/12

13:10-16:15

Nonstop8h 05m

£700

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 19/8

09:12-06:30

1 stop16h 18m

London Heathrow

Tue 8/9

08:40-20:00

1 stop16h 20m

£700

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Wed 25/11

15:20-23:10

2 stops26h 50m

London Luton

Mon 30/11

06:10-16:00

1 stop14h 50m

£722

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 13/12

18:35-06:35

Nonstop7h 00m

London Heathrow

Fri 25/12

13:10-16:15

Nonstop8h 05m

£731

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 21/10

18:45-06:50

Nonstop7h 05m

London Heathrow

Wed 4/11

06:30-14:05

1 stop12h 35m

£733

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 25/11

18:35-06:35

Nonstop7h 00m

London Heathrow

Mon 14/12

13:10-16:15

Nonstop8h 05m

£737

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 6/10

15:25-18:50

2 stops22h 25m

London Heathrow

Wed 14/10

08:00-09:50

3 stops30h 50m

£744

Flights are sorted by cheapest return flights first.

Deals found on 24/7

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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, September is the cheapest month in which you can book a flight from Philadelphia to London (average of £539). Flying from Philadelphia to London in June is currently the most expensive (average of £1,116). 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 29 July 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 29 July 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 £473 and £814 in October.
The cheapest return price found within the last 5 days was £666 on JetBlue (6 Oct–27 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 78% 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 £400.

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 29 July 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
11,839 reviews
Check prices

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Overall

7.1

Crew

7.9

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
11,839 reviews
American Airlines
7.1
Good
11,839 reviews
Check prices

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Overall

7.1

Crew

7.9

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
3,027 reviews
American Airlines
7.1
Good
11,839 reviews
Check prices

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Overall

7.1

Crew

7.9

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
3,260 reviews
American Airlines
7.1
Good
11,839 reviews
Check prices

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Overall

7.1

Crew

7.9

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
8,127 reviews
American Airlines
7.1
Good
11,839 reviews
Check prices

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Overall

7.1

Crew

7.9

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 £700, Delta can have you in London from Philadelphia in 7h. 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 £527 return. British Airways is currently priced 36% 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 (83%), American Airlines (78%) or Finnair (78%) 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 £1,042, our data indicates the cheapest price to be £526. The most popular route (Philadelphia - London Heathrow), is priced around £578.

  • 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, September is the cheapest month in which you can book a flight from Philadelphia to London (average of £539). Flying from Philadelphia to London in June is currently the most expensive (average of £1,116). 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
Hounslow
Milton Keynes
Luton
Gatwick
Wembley
Slough
Ilford
Hayes
Croydon
Colchester
Brentford
Eastbourne
Watford
Southend-on-Sea
Enfield
Kingston upon Thames
Southall
Aylesbury
Dover
Romford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to London

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
LaGuardia to Heathrow flights
Newark to Gatwick flights
John F Kennedy Intl to Stansted flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to Gatwick flights
John F Kennedy Intl to London City flights
LaGuardia to Gatwick flights
Newark to Stansted flights
Newark to London City flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Newark to Luton flights
John F Kennedy Intl to Edinburgh flights
Dulles Intl to London City flights
Newark to Edinburgh flights
Philadelphia to Heathrow flights
Reagan-National to Gatwick flights
Dulles Intl to Luton flights
LaGuardia to Stansted flights
Dulles Intl to Edinburgh flights
LaGuardia to Edinburgh flights
John F Kennedy Intl to Manchester flights
Pittsburgh to Heathrow flights
Philadelphia to Gatwick flights
Philadelphia to Edinburgh flights
Reagan-National to Edinburgh flights
Reagan-National to Luton flights
Philadelphia to Stansted flights
Newark to Manchester flights
Philadelphia to Luton flights
LaGuardia to Manchester flights
Pittsburgh to Gatwick flights
Pittsburgh to London City flights
Dulles Intl to Manchester flights
Reagan-National to Stansted flights
Reagan-National to Manchester flights
John F Kennedy Intl to Birmingham flights
Newark to Birmingham flights
Pittsburgh to Edinburgh flights
John F Kennedy Intl to Newcastle upon Tyne flights
Dulles Intl to Birmingham flights

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 29 July 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£423Average£745FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£527Average£812FlexibilityNo 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.