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Cheap flights from Philadelphia to London from £228

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
3 May — 10 May1
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 3 April 2026.

Wed 1/406:10
PHL
-
LGW
1 stop22h 50m
Multiple Airlines
Wed 29/414:00
LGW
-
PHL
1 stop32h 07m
Multiple Airlines
Deal found 29/3£557
Mon 21/920:25
PHL
-
LHR
1 stop11h 15m
Aer Lingus
Tue 13/1012:00
LHR
-
PHL
1 stop11h 55m
Aer Lingus
Deal found 29/3£574
Thu 30/410:54
PHL
-
STN
3 stops32h 36m
Multiple Airlines
Mon 4/505:55
STN
-
PHL
3 stops46h 50m
Multiple Airlines
Deal found 1/4£574
Mon 20/410:54
PHL
-
LGW
1 stop18h 06m
Multiple Airlines
Wed 29/414:00
LGW
-
PHL
2 stops24h 49m
Multiple Airlines
Deal found 30/3£575
Mon 27/405:05
PHL
-
LGW
1 stop23h 55m
Multiple Airlines
Mon 4/514:00
LGW
-
PHL
2 stops25h 41m
Multiple Airlines
Deal found 30/3£578
Wed 29/408:25
PHL
-
LHR
1 stop17h 05m
JetBlue
Wed 6/508:40
LHR
-
PHL
1 stop13h 58m
JetBlue
Deal found 31/3£578
Fri 1/506:00
PHL
-
LHR
1 stop19h 30m
JetBlue
Fri 8/508:40
LHR
-
PHL
1 stop18h 01m
JetBlue
Deal found 1/4£579
Thu 16/405:05
PHL
-
LGW
2 stops20h 15m
Multiple Airlines
Wed 22/414:00
LGW
-
PHL
1 stop22h 41m
Multiple Airlines
Deal found 31/3£590
Sun 19/422:38
PHL
-
LGW
1 stop30h 22m
Multiple Airlines
Sat 25/414:00
LGW
-
PHL
2 stops21h 08m
Multiple Airlines
Deal found 30/3£593
Sun 3/506:00
PHL
-
LHR
1 stop19h 30m
JetBlue
Thu 7/508:40
LHR
-
PHL
1 stop18h 01m
JetBlue
Deal found 1/4£596
Mon 4/508:25
PHL
-
LHR
1 stop17h 05m
JetBlue
Thu 7/508:40
LHR
-
PHL
1 stop13h 58m
JetBlue
Deal found 31/3£596
Mon 4/508:25
PHL
-
LHR
1 stop17h 05m
JetBlue
Tue 12/508:40
LHR
-
PHL
1 stop13h 58m
JetBlue
Deal found 29/3£599

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 3 April 2026.

Round-trip from

£557

One-way from

£228

Popular in

June

Cheapest in

September

Average price

£599

Good round-trip deal

£652 or less

Good one-way deal

£358 or less
19/4-25/4
  • 19/4-25/4
  • 2 total stops
  • 53h 03m total
  • Philadelphia to London
Search Deals
21/4
  • 21/4
  • 3 total stops
  • 21h 50m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£102 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 3 April 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 - LHR

PHLLHR

Philadelphia

Tue 8/9

09:40-16:00

2 stops25h 20m

London Heathrow

Tue 22/9

19:50-19:58

3 stops29h 08m

£629

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Wed 15/4

15:30-00:45

3 stops28h 15m

London Stansted

Wed 22/4

19:20-14:46

3 stops24h 26m

£669

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Thu 20/8

20:25-12:25

1 stop11h 00m

London Luton

Wed 26/8

09:40-10:58

2 stops30h 18m

£714

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 8/9

13:00-07:10

1 stop13h 10m

London Heathrow

Tue 22/9

09:55-19:58

2 stops15h 03m

£720

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 28/9

16:05-16:00

2 stops18h 55m

London Heathrow

Thu 1/10

06:40-22:37

2 stops20h 57m

£725

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Mon 21/9

16:15-09:10

1 stop11h 55m

London City

Tue 13/10

09:35-17:50

1 stop13h 15m

£727
Fastest return journey

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 15/9

18:45-06:50

Nonstop7h 05m

London Heathrow

Tue 22/9

13:45-16:40

Nonstop7h 55m

£730

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Tue 8/9

08:28-09:45

2 stops20h 17m

London Gatwick

Tue 22/9

21:15-22:32

3 stops30h 17m

£739

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Sun 13/9

18:50-10:20

1 stop10h 30m

London City

Wed 23/9

07:00-13:45

1 stop11h 45m

£747

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Wed 29/4

09:15-21:25

3 stops31h 10m

London Luton

Wed 6/5

21:50-22:43

3 stops29h 53m

£748

Flights are sorted by cheapest return flights first.

Deals found on 29/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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 2 April 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, November is the cheapest month in which you can book a flight from Philadelphia to London (average of £213). Flying from Philadelphia to London in June is currently the most expensive (average of £404). 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 3 April 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 3 April 2026.

The most flights from PHL to LON are scheduled on a Monday (15 on average). You will have fewer flight options on Tuesday, 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 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 £443.

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 3 April 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
2,912 reviews
Check prices

Entertainment

7.2

Food

6.6

Comfort

7.5

Overall

7.2

Crew

7.9

Boarding

7.3

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
2,912 reviews
JetBlue
7.2
Good
2,912 reviews
Check prices

Entertainment

7.2

Food

6.6

Comfort

7.5

Overall

7.2

Crew

7.9

Boarding

7.3

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
11,557 reviews
JetBlue
7.2
Good
2,912 reviews
Check prices

Entertainment

7.2

Food

6.6

Comfort

7.5

Overall

7.2

Crew

7.9

Boarding

7.3

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
3,163 reviews
JetBlue
7.2
Good
2,912 reviews
Check prices

Entertainment

7.2

Food

6.6

Comfort

7.5

Overall

7.2

Crew

7.9

Boarding

7.3

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
7,848 reviews
JetBlue
7.2
Good
2,912 reviews
Check prices

Entertainment

7.2

Food

6.6

Comfort

7.5

Overall

7.2

Crew

7.9

Boarding

7.3

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 13 daily outbound flights to London from 3 different airlines.

  • How long is the flight from Philadelphia to London?

    For as low as £727, Scandinavian Airlines can have you in London from Philadelphia in 11h 55m. There are 3553 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 £390. Additional return tickets that might be worth considering are offered by Aer Lingus and American Airlines, with the lowest prices starting at £397 and £517, respectively. British Airways is currently priced 34% 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 (94%), Malaysia Airlines (93%) or American Airlines (92%) 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 £592, our data indicates the cheapest price to be £208. The most popular route (Philadelphia - London Heathrow), is priced around £596.

  • 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, November is the cheapest month in which you can book a flight from Philadelphia to London (average of £213). Flying from Philadelphia to London in June is currently the most expensive (average of £404). 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 3 airlines flying from Philadelphia to London

Discover the top 3 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 3 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£390Average£581FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£397Average£526FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£517Average£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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