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Cheap flights from Philadelphia to London from £235

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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
31 May — 7 Jun1
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 Tuesday 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 1 May 2026.

Sat 14/1106:00
PHL
-
LHR
3 stops25h 55m
Scandinavian Airlines
Mon 16/1107:05
LHR
-
PHL
3 stops18h 02m
Scandinavian Airlines
Deal found 27/4£556
Sat 19/922:20
PHL
-
LHR
1 stop27h 45m
British Airways
Tue 22/906:15
LHR
-
PHL
1 stop16h 25m
British Airways
Deal found 29/4£576
Mon 25/514:57
PHL
-
LGW
1 stop14h 03m
Multiple Airlines
Mon 1/614:00
LGW
-
PHL
1 stop23h 54m
Multiple Airlines
Deal found 27/4£582
Wed 12/806:42
PHL
-
LGW
1 stop22h 18m
Multiple Airlines
Wed 2/914:00
LGW
-
PHL
1 stop15h 25m
Multiple Airlines
Deal found 27/4£585
Wed 27/514:57
PHL
-
LGW
1 stop14h 03m
Multiple Airlines
Wed 3/614:00
LGW
-
PHL
1 stop14h 29m
Multiple Airlines
Deal found 27/4£590
Sat 23/521:16
PHL
-
LGW
1 stop31h 44m
Multiple Airlines
Tue 26/514:00
LGW
-
PHL
1 stop23h 59m
Multiple Airlines
Deal found 30/4£591
Tue 29/920:25
PHL
-
STN
1 stop11h 20m
Multiple Airlines
Tue 20/1006:30
STN
-
PHL
2 stops17h 25m
Multiple Airlines
Deal found 28/4£599
Tue 22/920:25
PHL
-
STN
1 stop11h 20m
Multiple Airlines
Tue 6/1006:30
STN
-
PHL
2 stops17h 25m
Multiple Airlines
Deal found 27/4£614
Sun 23/820:25
PHL
-
STN
1 stop11h 30m
Multiple Airlines
Mon 31/807:05
STN
-
PHL
2 stops16h 50m
Multiple Airlines
Deal found 26/4£616
Wed 23/912:50
PHL
-
LGW
1 stop16h 10m
Multiple Airlines
Sun 27/914:00
LGW
-
PHL
1 stop26h 55m
Multiple Airlines
Deal found 28/4£618
Sun 10/514:57
PHL
-
STN
3 stops27h 23m
Multiple Airlines
Wed 13/518:20
STN
-
PHL
3 stops34h 25m
Multiple Airlines
Deal found 26/4£623
Tue 26/521:16
PHL
-
LGW
1 stop31h 44m
Multiple Airlines
Tue 2/614:00
LGW
-
PHL
1 stop23h 59m
Multiple Airlines
Deal found 28/4£623

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 1 May 2026.

Round-trip from

£576

One-way from

£235

Popular in

June

Cheapest in

September

Average price

£638

Good round-trip deal

£679 or less

Good one-way deal

£435 or less
British Airways
  • British Airways
  • 19/9-22/9
  • 2 total stops
  • 44h 10m total
  • Philadelphia to London
Search Deals
11/8
  • 11/8
  • 3 total stops
  • 35h 50m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£120 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 1 May 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 - LGW

PHLLGW

Philadelphia

Thu 1/10

08:00-10:00

1 stop21h 00m

London Gatwick

Wed 7/10

14:00-11:55

1 stop26h 55m

£651

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 27/8

09:40-09:20

2 stops18h 40m

London Heathrow

Mon 31/8

19:50-19:58

3 stops29h 08m

£676

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 18/9

09:40-12:55

3 stops22h 15m

London Heathrow

Mon 28/9

07:05-22:37

3 stops20h 32m

£682

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Tue 15/9

20:25-12:45

1 stop11h 20m

London Stansted

Tue 22/9

07:05-18:55

2 stops16h 50m

£698

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 15/8

17:15-07:10

1 stop32h 55m

London Heathrow

Wed 19/8

16:05-22:37

1 stop11h 32m

£704

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Tue 13/10

15:25-20:25

3 stops24h 00m

London Gatwick

Wed 21/10

12:05-09:50

2 stops26h 45m

£711

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 4/8

17:28-13:15

2 stops14h 47m

London Heathrow

Wed 12/8

06:30-17:14

2 stops15h 44m

£713

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Mon 3/8

10:50-12:50

3 stops21h 00m

London Stansted

Tue 11/8

06:30-14:49

2 stops13h 19m

£718

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Tue 29/9

10:45-09:45

2 stops18h 00m

London Gatwick

Tue 20/10

21:15-22:43

3 stops30h 28m

£719

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 9/9

13:00-08:50

2 stops14h 50m

London Heathrow

Mon 28/9

11:45-22:37

2 stops15h 52m

£719

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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.

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

Currently, February is the cheapest month in which you can book a flight from Philadelphia to London (average of £33). Flying from Philadelphia to London in August is currently the most expensive (average of £622). 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 1 May 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 1 May 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?

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 83% 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 £433.

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: 9h 55m.

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 47m.

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 1 May 2026.
Read reviews from past customers who have flown with JetBlue,American Airlines, 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.
JetBlue
7.2
Good
2,969 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Food

6.6

Boarding

7.3

Crew

7.9

Overall

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

FLL - ORH

I pay extra for an even more seat row 3, but the luggage area has no more spots so i have to place my luggage in row 10. This was totally un accepatable.
JetBlue
7.2
Good
2,969 reviews
JetBlue
7.2
Good
2,969 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Food

6.6

Boarding

7.3

Crew

7.9

Overall

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

FLL - ORH

I pay extra for an even more seat row 3, but the luggage area has no more spots so i have to place my luggage in row 10. This was totally un accepatable.
American Airlines
7.1
Good
11,684 reviews
JetBlue
7.2
Good
2,969 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Food

6.6

Boarding

7.3

Crew

7.9

Overall

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

FLL - ORH

I pay extra for an even more seat row 3, but the luggage area has no more spots so i have to place my luggage in row 10. This was totally un accepatable.
Iberia
7.0
Good
3,204 reviews
JetBlue
7.2
Good
2,969 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Food

6.6

Boarding

7.3

Crew

7.9

Overall

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

FLL - ORH

I pay extra for an even more seat row 3, but the luggage area has no more spots so i have to place my luggage in row 10. This was totally un accepatable.
British Airways
6.7
Okay
7,937 reviews
JetBlue
7.2
Good
2,969 reviews
Check prices

Entertainment

7.2

Comfort

7.5

Food

6.6

Boarding

7.3

Crew

7.9

Overall

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

FLL - ORH

I pay extra for an even more seat row 3, but the luggage area has no more spots so i have to place my luggage in row 10. This was totally un accepatable.

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 4 different airlines.

  • How long is the flight from Philadelphia to London?

    For as low as £676, Scandinavian Airlines can have you in London from Philadelphia in 18h 40m. 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 £381. Additional return tickets that might be worth considering are offered by Aer Lingus and JetBlue, with the lowest prices starting at £388 and £423, respectively. British Airways is currently priced 35% 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 Iberia (93%), Malaysia Airlines (93%) or American Airlines (90%) 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 £615, our data indicates the cheapest price to be £400. The most popular route (Philadelphia - London Heathrow), is priced around £636.

  • 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, February is the cheapest month in which you can book a flight from Philadelphia to London (average of £33). Flying from Philadelphia to London in August is currently the most expensive (average of £622). 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?

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Alternative routes for Philadelphia to London

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Philadelphia to London

Discover the top 4 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 1 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£381Average£581FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£388Average£515FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£423Average£555FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
American AirlinesCheapest£505Average£658FlexibilityNo 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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