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Cheap flights from Philadelphia to London from £184

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
21 Jun — 28 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 87 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 22 May 2026.

Mon 14/917:50
PHL
-
LHR
1 stop9h 10m
Multiple Airlines
Mon 28/909:50
LHR
-
PHL
1 stop14h 05m
Multiple Airlines
Deal found 17/5£657
Tue 13/1018:13
PHL
-
LHR
1 stop12h 07m
KLM
Mon 26/1020:25
LHR
-
PHL
2 stops26h 59m
KLM
Deal found 17/5£658
Thu 20/809:30
PHL
-
LHR
2 stops25h 30m
Scandinavian Airlines
Tue 25/807:05
LHR
-
PHL
3 stops20h 11m
Scandinavian Airlines
Deal found 18/5£659
Thu 16/708:25
PHL
-
LGW
2 stops20h 35m
Multiple Airlines
Sun 16/814:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Deal found 17/5£659
Tue 20/1018:45
PHL
-
LHR
Nonstop7h 05m
Finnair
Mon 26/1021:10
LHR
-
PHL
1 stop21h 45m
Finnair
Deal found 17/5£660
Sat 3/1006:00
PHL
-
LHR
1 stop19h 30m
JetBlue
Tue 3/1109:20
LHR
-
PHL
1 stop18h 16m
JetBlue
Deal found 18/5£663
Mon 17/818:50
PHL
-
LHR
1 stop10h 20m
American Airlines
Fri 21/808:15
LHR
-
PHL
1 stop12h 55m
American Airlines
Deal found 17/5£666
Mon 5/1020:25
PHL
-
LHR
1 stop11h 15m
Aer Lingus
Tue 13/1013:25
LHR
-
PHL
1 stop10h 30m
Aer Lingus
Deal found 17/5£667
Wed 19/809:30
PHL
-
LHR
2 stops25h 30m
Scandinavian Airlines
Fri 4/906:40
LHR
-
PHL
2 stops20h 40m
Scandinavian Airlines
Deal found 18/5£669
Tue 20/1018:13
PHL
-
LHR
1 stop12h 07m
KLM
Mon 26/1020:25
LHR
-
PHL
2 stops26h 59m
KLM
Deal found 18/5£669
Wed 19/817:43
PHL
-
LHR
1 stop11h 22m
American Airlines
Fri 4/908:15
LHR
-
PHL
1 stop12h 50m
American Airlines
Deal found 18/5£670
Sun 12/721:16
PHL
-
LGW
1 stop31h 44m
Multiple Airlines
Sun 16/814:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Deal found 17/5£670

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 22 May 2026.

Round-trip from

£657

One-way from

£184

Popular in

June

Cheapest in

September

Average price

£658

Good round-trip deal

£817 or less
Aer Lingus
  • Aer Lingus
  • 14/9-28/9
  • 2 total stops
  • 23h 15m total
  • Philadelphia to London
Search Deals
Aer Lingus
  • Aer Lingus
  • 5/10
  • 2 total stops
  • 13h 42m 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. 6% potential price decrease (£26 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

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 22 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 - STN

PHLSTN

Philadelphia

Mon 14/9

10:05-00:20

3 stops33h 15m

London Stansted

Sat 19/9

19:55-18:55

2 stops28h 00m

£719

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 9/10

17:38-10:40

1 stop12h 02m

London Heathrow

Tue 13/10

06:30-17:19

2 stops15h 49m

£720

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 7/11

14:12-11:40

1 stop16h 28m

London Heathrow

Wed 11/11

06:30-17:19

2 stops15h 49m

£720

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Mon 21/9

15:25-15:35

2 stops19h 10m

London Gatwick

Mon 28/9

12:05-09:50

2 stops26h 45m

£721

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 9/10

17:38-10:40

1 stop12h 02m

London Heathrow

Mon 12/10

09:55-22:38

2 stops17h 43m

£757

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 21/8

12:33-06:45

2 stops13h 12m

London Heathrow

Mon 24/8

06:30-19:15

2 stops17h 45m

£760

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Tue 1/9

20:25-13:25

1 stop12h 00m

London Luton

Wed 9/9

06:15-18:04

2 stops16h 49m

£761

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Fri 9/10

10:35-20:20

3 stops28h 45m

London Stansted

Mon 12/10

20:00-18:55

2 stops27h 55m

£762

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Thu 27/8

13:15-09:25

2 stops15h 10m

London Gatwick

Mon 31/8

10:25-23:00

2 stops17h 35m

£766

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Wed 28/10

15:30-09:50

2 stops14h 20m

London Gatwick

Fri 6/11

16:40-22:36

2 stops34h 56m

£772

Flights are sorted by cheapest return flights first.

Deals found on 21/5

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

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 £34). Flying from Philadelphia to London in September is currently the most expensive (average of £880). 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 22 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 22 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 81% 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 £437.

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.

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 22 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
2,980 reviews
Check prices

Overall

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Entertainment

7.2

Comfort

7.5

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
2,980 reviews
JetBlue
7.2
Good
2,980 reviews
Check prices

Overall

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Entertainment

7.2

Comfort

7.5

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
11,643 reviews
JetBlue
7.2
Good
2,980 reviews
Check prices

Overall

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Entertainment

7.2

Comfort

7.5

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
3,220 reviews
JetBlue
7.2
Good
2,980 reviews
Check prices

Overall

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Entertainment

7.2

Comfort

7.5

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
7,992 reviews
JetBlue
7.2
Good
2,980 reviews
Check prices

Overall

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Entertainment

7.2

Comfort

7.5

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 £720, Delta can have you in London from Philadelphia in 12h 02m. 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 £384. Additional return tickets that might be worth considering are offered by Aer Lingus and JetBlue, with the lowest prices starting at £391 and £427, 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 Malaysia Airlines (98%), Iberia (96%) or American Airlines (94%) 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 £952, our data indicates the cheapest price to be £669. The most popular route (Philadelphia - London Heathrow), is priced around £556.

  • 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 £34). Flying from Philadelphia to London in September is currently the most expensive (average of £880). 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

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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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Pittsburgh to London City flights
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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 22 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£384Average£614FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£391Average£513FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£427Average£652FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
American AirlinesCheapest£522Average£697FlexibilityNo 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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