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Cheap flights from Philadelphia to London from £168

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 19/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
19 Jul — 26 Jul1
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 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 19 June 2026.

Fri 4/910:50
PHL
-
LTN
3 stops25h 35m
Multiple Airlines
Fri 11/906:20
LTN
-
PHL
2 stops14h 21m
Multiple Airlines
Deal found 14/6£651
Wed 26/808:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Wed 2/908:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Deal found 15/6£651
Tue 11/816:20
PHL
-
LGW
2 stops13h 45m
Multiple Airlines
Mon 17/821:30
LGW
-
PHL
2 stops22h 19m
Multiple Airlines
Deal found 15/6£651
Wed 29/720:25
PHL
-
LTN
1 stop14h 00m
Multiple Airlines
Wed 5/806:15
LTN
-
PHL
1 stop17h 40m
Multiple Airlines
Deal found 16/6£652
Tue 3/1119:50
PHL
-
LHR
Nonstop7h 00m
Multiple Airlines
Fri 13/1109:20
LHR
-
PHL
1 stop13h 12m
Multiple Airlines
Deal found 16/6£652
Sun 6/921:16
PHL
-
LGW
1 stop31h 44m
Multiple Airlines
Fri 11/914:00
LGW
-
PHL
1 stop24h 32m
Multiple Airlines
Deal found 14/6£652
Tue 27/1017:50
PHL
-
LHR
1 stop11h 25m
Multiple Airlines
Tue 3/1109:20
LHR
-
PHL
1 stop13h 12m
Multiple Airlines
Deal found 15/6£653
Tue 15/920:25
PHL
-
STN
1 stop19h 55m
Multiple Airlines
Tue 22/911:35
STN
-
PHL
1 stop12h 20m
Multiple Airlines
Deal found 16/6£653
Wed 12/813:28
PHL
-
LGW
1 stop15h 32m
Multiple Airlines
Tue 25/814:00
LGW
-
PHL
1 stop23h 56m
Multiple Airlines
Deal found 15/6£653
Tue 15/917:30
PHL
-
LHR
1 stop9h 30m
Multiple Airlines
Tue 22/908:40
LHR
-
PHL
1 stop14h 24m
Multiple Airlines
Deal found 16/6£653
Tue 28/720:25
PHL
-
LGW
1 stop19h 50m
Multiple Airlines
Tue 4/809:40
LGW
-
PHL
1 stop14h 15m
Multiple Airlines
Deal found 14/6£653
Tue 1/1217:30
PHL
-
STN
1 stop15h 35m
Multiple Airlines
Sun 6/1208:10
STN
-
PHL
1 stop12h 50m
Multiple Airlines
Deal found 16/6£654

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 19 June 2026.

Round-trip from

£651

One-way from

£168

Popular in

June

Cheapest in

September

Average price

£1,040

Good round-trip deal

£782 or less
4/9-11/9
  • 4/9-11/9
  • 5 total stops
  • 39h 56m total
  • Philadelphia to London
Search Deals
19/10
  • 19/10
  • 1 total stop
  • 35h 03m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (£158 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 19 June 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

Tue 1/12

17:30-14:05

1 stop15h 35m

London Stansted

Sun 6/12

08:10-16:00

1 stop12h 50m

£654

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Thu 6/8

10:50-21:20

2 stops29h 30m

London Stansted

Mon 10/8

22:45-14:49

2 stops21h 04m

£677

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Tue 1/12

17:30-10:45

1 stop12h 15m

London Luton

Sun 6/12

08:45-16:00

1 stop12h 15m

£690

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 5/10

12:06-07:15

1 stop14h 09m

London Heathrow

Tue 13/10

06:30-17:19

2 stops15h 49m

£691

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 7/10

10:05-10:00

1 stop18h 55m

London Heathrow

Thu 15/10

07:30-16:05

1 stop13h 35m

£691

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 7/10

13:20-06:45

1 stop12h 25m

London Heathrow

Thu 15/10

06:30-17:19

2 stops15h 49m

£691

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 6/10

17:15-13:15

2 stops15h 00m

London Heathrow

Tue 27/10

11:45-23:02

2 stops15h 17m

£695
Fastest return journey

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 13/9

18:45-06:50

Nonstop7h 05m

London Heathrow

Wed 16/9

13:45-16:40

Nonstop7h 55m

£702

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Thu 17/9

20:25-16:45

1 stop15h 20m

London Luton

Mon 28/9

12:25-18:55

1 stop11h 30m

£712

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 10/10

09:40-06:45

1 stop16h 05m

London Heathrow

Wed 14/10

06:30-17:19

2 stops15h 49m

£729

Flights are sorted by cheapest return flights first.

Deals found on 14/6

Showing 1-10 of 60 resultsSorted by cheapest first
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2
3
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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 August is currently the most expensive (average of £1,138). 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 19 June 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 19 June 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 77% 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 £442.

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 19 June 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
11,704 reviews
Check prices

Crew

7.9

Overall

7.1

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!
American Airlines
7.1
Good
11,704 reviews
American Airlines
7.1
Good
11,704 reviews
Check prices

Crew

7.9

Overall

7.1

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!
JetBlue
7.1
Good
2,987 reviews
American Airlines
7.1
Good
11,704 reviews
Check prices

Crew

7.9

Overall

7.1

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!
Iberia
7.0
Good
3,238 reviews
American Airlines
7.1
Good
11,704 reviews
Check prices

Crew

7.9

Overall

7.1

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!
British Airways
6.7
Okay
8,055 reviews
American Airlines
7.1
Good
11,704 reviews
Check prices

Crew

7.9

Overall

7.1

Comfort

7.2

Entertainment

6.8

Boarding

7.5

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!

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 £691, Delta can have you in London from Philadelphia in 9h 50m. 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 £389. Another option worth looking into is American Airlines, starting at £516 return. British Airways is currently priced 37% 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 (90%), American Airlines (86%) or Finnair (86%) 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 £1,035, our data indicates the cheapest price to be £250. The most popular route (Philadelphia - London Heathrow), is priced around £598.

  • 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 August is currently the most expensive (average of £1,138). 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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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 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 19 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£389Average£641FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£516Average£673FlexibilityNo 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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