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Cheap flights from Philadelphia to London from £141

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 24/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
12 Mar — 19 Mar1
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 Wednesday and return on a Wednesday

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 10 February 2026.

Thu 26/315:30
PHL
-
LHR
1 stop11h 40m
Air Canada
Mon 30/308:30
LHR
-
PHL
1 stop12h 14m
Air Canada
Deal found 8/2£442
Tue 10/307:25
PHL
-
STN
3 stops26h 25m
Multiple Airlines
Wed 18/320:40
STN
-
PHL
2 stops24h 25m
Multiple Airlines
Deal found 9/2£442
Fri 17/416:25
PHL
-
LGW
2 stops22h 30m
Multiple Airlines
Mon 20/420:40
LGW
-
PHL
2 stops24h 04m
Multiple Airlines
Deal found 8/2£445
Wed 6/516:20
PHL
-
STN
2 stops24h 00m
Multiple Airlines
Sun 10/506:35
STN
-
PHL
2 stops14h 03m
Multiple Airlines
Deal found 9/2£446
Wed 4/319:46
PHL
-
LGW
1 stop33h 14m
Multiple Airlines
Mon 9/314:00
LGW
-
PHL
1 stop32h 51m
Multiple Airlines
Deal found 10/2£446
Wed 1/416:25
PHL
-
LTN
2 stops23h 50m
Multiple Airlines
Wed 8/406:15
LTN
-
PHL
2 stops14h 29m
Multiple Airlines
Deal found 10/2£447
Tue 5/516:20
PHL
-
STN
2 stops20h 15m
Multiple Airlines
Tue 12/506:30
STN
-
PHL
2 stops14h 08m
Multiple Airlines
Deal found 9/2£448
Sun 1/319:46
PHL
-
LGW
1 stop33h 14m
Multiple Airlines
Fri 6/314:00
LGW
-
PHL
1 stop14h 16m
Multiple Airlines
Deal found 8/2£448
Mon 2/305:30
PHL
-
LGW
1 stop23h 30m
Multiple Airlines
Fri 6/314:00
LGW
-
PHL
1 stop14h 16m
Multiple Airlines
Deal found 9/2£449
Sun 22/318:40
PHL
-
LTN
2 stops22h 25m
Multiple Airlines
Mon 30/315:30
LTN
-
PHL
3 stops29h 35m
Multiple Airlines
Deal found 8/2£451
Wed 1/416:25
PHL
-
STN
2 stops23h 55m
Multiple Airlines
Mon 6/422:45
STN
-
PHL
2 stops21h 59m
Multiple Airlines
Deal found 10/2£454
Wed 4/315:30
PHL
-
STN
2 stops17h 40m
Multiple Airlines
Wed 11/305:55
STN
-
PHL
3 stops20h 49m
Multiple Airlines
Deal found 9/2£457

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 10 February 2026.

Round-trip from

£442

One-way from

£141

Popular in

June

Cheapest in

September

Average price

£508

Good round-trip deal

£572 or less

Good one-way deal

£277 or less
Air Canada
  • Air Canada
  • 26/3-30/3
  • 2 total stops
  • 23h 54m total
  • Philadelphia to London
Search Deals
24/3
  • 24/3
  • 1 total stop
  • 13h 50m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£101 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 10 February 2026.
Use the filters below to find and compare flights from Philadelphia to London that are best for you.

Fly from

Philadelphia

Fly to

London

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Mon 30/3

16:25-12:50

2 stops15h 25m

London Stansted

Tue 7/4

22:00-15:44

2 stops22h 44m

£471

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Sun 8/3

07:25-11:30

3 stops24h 05m

London Stansted

Mon 16/3

11:55-17:05

2 stops33h 10m

£479

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Tue 10/3

15:30-20:20

2 stops24h 50m

London Luton

Wed 18/3

14:40-17:05

2 stops30h 25m

£485

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Sat 21/3

18:30-07:35

1 stop9h 05m

London Luton

Wed 25/3

06:50-17:00

1 stop14h 10m

£490

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Sat 21/3

18:30-07:50

1 stop9h 20m

London Stansted

Wed 25/3

06:30-17:00

1 stop14h 30m

£502

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Sun 8/3

07:25-12:00

3 stops24h 35m

London Luton

Tue 17/3

06:20-22:44

3 stops20h 24m

£516

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Wed 11/3

18:30-08:35

1 stop10h 05m

London Luton

Wed 18/3

06:50-17:00

1 stop14h 10m

£525

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Mon 9/3

21:50-12:40

1 stop10h 50m

London City

Wed 18/3

06:50-14:55

1 stop12h 05m

£537

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 13/4

18:45-06:50

Nonstop7h 05m

London Heathrow

Mon 20/4

20:35-13:50

1 stop22h 15m

£539

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 12/5

17:55-08:00

1 stop9h 05m

London Heathrow

Mon 18/5

18:10-16:05

1 stop26h 55m

£540

Flights are sorted by cheapest return flights first.

Deals found on 9/2

Showing 1-10 of 60 results
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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

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

Use this chart to determine the optimal time to book a return flight from Philadelphia to London. Price data was last updated on 6 February 2026.

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 54 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, April is the cheapest month in which you can book a flight from Philadelphia to London (average of £104). Flying from Philadelphia to London in June is currently the most expensive (average of £389). 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 10 February 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 10 February 2026.

The most flights from PHL to LON are scheduled on a Monday (10 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 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 71% 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 £452.

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 50m.

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 43m.

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 10 February 2026.
Read reviews from past customers who have flown with American Airlines, JetBlue, andAer Lingus 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
7.2
Good
11,265 reviews
Check prices

Food

6.4

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,265 reviews
American Airlines
7.2
Good
11,265 reviews
Check prices

Food

6.4

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
JetBlue
7.2
Good
2,894 reviews
American Airlines
7.2
Good
11,265 reviews
Check prices

Food

6.4

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
Aer Lingus
7.2
Good
1,447 reviews
American Airlines
7.2
Good
11,265 reviews
Check prices

Food

6.4

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
Iberia
7.0
Good
3,112 reviews
American Airlines
7.2
Good
11,265 reviews
Check prices

Food

6.4

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
British Airways
6.7
Okay
7,728 reviews
American Airlines
7.2
Good
11,265 reviews
Check prices

Food

6.4

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

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 7 daily outbound flights to London from 4 different airlines.

  • How long is the flight from Philadelphia to London?

    For as low as £557, Delta can have you in London from Philadelphia in 7h 25m. 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 £378. Additional return tickets that might be worth considering are offered by Aer Lingus and JetBlue, with the lowest prices starting at £385 and £420, respectively. British Airways is currently priced 33% 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 Aer Lingus (82%), American Airlines (76%) or Finnair (76%) 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 £502, our data indicates the cheapest price to be £273. The most popular route (Philadelphia - London Heathrow), is priced around £470.

  • 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, April is the cheapest month in which you can book a flight from Philadelphia to London (average of £104). Flying from Philadelphia to London in June is currently the most expensive (average of £389). 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 10 February 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£378Average£546FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£385Average£510FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£420Average£507FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
American AirlinesCheapest£501Average£638FlexibilityNo 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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