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Cheap flights from Philadelphia to London from £208

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
14 Jun — 21 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 15 May 2026.

Mon 28/919:35
PHL
-
LHR
Nonstop7h 15m
Iberia
Wed 30/907:50
LHR
-
PHL
1 stop14h 50m
Iberia
Deal found 12/5£564
Sat 1/821:16
PHL
-
LGW
1 stop31h 44m
Multiple Airlines
Wed 26/814:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Deal found 12/5£570
Sat 1/821:16
PHL
-
LGW
1 stop31h 44m
Multiple Airlines
Mon 31/814:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Deal found 11/5£576
Wed 16/920:25
PHL
-
LHR
1 stop9h 45m
Aer Lingus
Wed 7/1013:25
LHR
-
PHL
1 stop10h 30m
Aer Lingus
Deal found 11/5£580
Wed 9/920:25
PHL
-
LTN
1 stop11h 10m
Multiple Airlines
Wed 16/906:15
LTN
-
PHL
1 stop17h 40m
Multiple Airlines
Deal found 11/5£580
Wed 9/920:25
PHL
-
STN
1 stop18h 05m
Multiple Airlines
Wed 16/908:30
STN
-
PHL
1 stop15h 25m
Multiple Airlines
Deal found 11/5£585
Sun 2/807:20
PHL
-
LGW
2 stops21h 40m
Multiple Airlines
Wed 26/814:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Deal found 12/5£587
Wed 9/920:25
PHL
-
LGW
1 stop11h 05m
Multiple Airlines
Wed 16/909:45
LGW
-
PHL
1 stop14h 10m
Multiple Airlines
Deal found 11/5£591
Wed 2/920:25
PHL
-
STN
1 stop18h 05m
Multiple Airlines
Tue 8/906:30
STN
-
PHL
1 stop17h 25m
Multiple Airlines
Deal found 13/5£592
Mon 7/915:25
PHL
-
LGW
2 stops24h 30m
Multiple Airlines
Mon 14/921:30
LGW
-
PHL
2 stops29h 02m
Multiple Airlines
Deal found 11/5£593
Wed 2/920:25
PHL
-
LTN
1 stop11h 10m
Multiple Airlines
Tue 8/909:40
LTN
-
PHL
1 stop14h 15m
Multiple Airlines
Deal found 13/5£594
Fri 31/708:30
PHL
-
LGW
2 stops20h 30m
Multiple Airlines
Wed 26/814:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Deal found 12/5£596

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 15 May 2026.

Round-trip from

£564

One-way from

£208

Popular in

June

Cheapest in

September

Average price

£654

Good round-trip deal

£837 or less

Good one-way deal

£437 or less
Iberia
  • Iberia
  • 28/9-30/9
  • 1 total stop
  • 22h 05m total
  • Philadelphia to London
Search Deals
British Airways
  • British Airways
  • 10/11
  • 1 total stop
  • 11h 31m 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 (£25 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 15 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 - LTN

PHLLTN

Philadelphia

Wed 9/9

20:25-12:35

1 stop11h 10m

London Luton

Wed 16/9

06:15-18:55

1 stop17h 40m

£580

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 22/9

08:25-06:25

1 stop17h 00m

London Heathrow

Fri 25/9

06:30-23:00

2 stops21h 30m

£682

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 1/9

12:02-06:25

1 stop13h 23m

London Heathrow

Fri 11/9

09:55-21:18

2 stops16h 23m

£682

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 7/9

17:38-10:40

1 stop12h 02m

London Heathrow

Wed 16/9

06:30-17:14

2 stops15h 44m

£682

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Wed 2/9

20:25-19:30

1 stop18h 05m

London Stansted

Tue 8/9

06:30-18:55

1 stop17h 25m

£682

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 4/10

10:45-06:30

1 stop14h 45m

London Heathrow

Thu 15/10

08:40-17:59

1 stop14h 19m

£687
Fastest return journey

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 28/9

18:45-06:50

Nonstop7h 05m

London Heathrow

Wed 30/9

13:45-16:40

Nonstop7h 55m

£692

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 16/8

12:11-13:15

1 stop20h 04m

London Heathrow

Mon 24/8

06:30-17:27

2 stops15h 57m

£718

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 8/11

13:00-08:05

2 stops14h 05m

London Heathrow

Sat 14/11

06:30-17:19

2 stops15h 49m

£722

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Sun 13/9

07:00-20:25

3 stops32h 25m

London Stansted

Wed 16/9

21:30-21:32

3 stops29h 02m

£722

Flights are sorted by cheapest return flights first.

Deals found on 13/5

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

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 September is currently the most expensive (average of £866). 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 15 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 15 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 £435.

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 15 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
2,977 reviews
Check prices

Entertainment

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Overall

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
2,977 reviews
JetBlue
7.2
Good
2,977 reviews
Check prices

Entertainment

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Overall

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
11,665 reviews
JetBlue
7.2
Good
2,977 reviews
Check prices

Entertainment

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Overall

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
3,218 reviews
JetBlue
7.2
Good
2,977 reviews
Check prices

Entertainment

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Overall

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
7,982 reviews
JetBlue
7.2
Good
2,977 reviews
Check prices

Entertainment

7.2

Crew

7.9

Boarding

7.3

Food

6.6

Overall

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 £692, Delta can have you in London from Philadelphia in 7h 05m. 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 £382. Additional return tickets that might be worth considering are offered by Aer Lingus and JetBlue, with the lowest prices starting at £390 and £425, 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 (96%), Iberia (95%) 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 £770, our data indicates the cheapest price to be £402. The most popular route (Philadelphia - London Heathrow), is priced around £605.

  • 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 September is currently the most expensive (average of £866). 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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Browse thousands of different options on Cheapflights for your next trip

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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 15 May 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£382Average£587FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£390Average£511FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£425Average£588FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
American AirlinesCheapest£520Average£694FlexibilityNo 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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