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Cheap flights from Philadelphia to London from £179

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 21/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
30 Jul — 6 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Philadelphia to London are usually found in September or November, booked 14 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 30 June 2026.

Sun 9/815:25
PHL
-
STN
2 stops23h 05m
Multiple Airlines
Sun 16/822:00
STN
-
PHL
2 stops21h 49m
Multiple Airlines
Deal found 29/6£657
Sat 10/1011:00
PHL
-
LHR
3 stops20h 55m
Scandinavian Airlines
Mon 12/1006:40
LHR
-
PHL
2 stops20h 27m
Scandinavian Airlines
Deal found 30/6£658
Mon 28/915:25
PHL
-
LHR
1 stop10h 05m
Multiple Airlines
Sun 4/1020:05
LHR
-
PHL
2 stops25h 00m
Multiple Airlines
Deal found 29/6£659
Thu 30/720:25
PHL
-
STN
1 stop19h 55m
Multiple Airlines
Tue 4/806:30
STN
-
PHL
1 stop17h 25m
Multiple Airlines
Deal found 29/6£659
Sun 26/712:46
PHL
-
LGW
1 stop16h 14m
Multiple Airlines
Mon 17/814:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Deal found 29/6£659
Mon 24/809:12
PHL
-
LHR
1 stop16h 18m
JetBlue
Mon 31/808:40
LHR
-
PHL
1 stop16h 21m
JetBlue
Deal found 28/6£660
Fri 24/710:05
PHL
-
STN
2 stops28h 15m
Multiple Airlines
Wed 29/706:30
STN
-
PHL
2 stops21h 16m
Multiple Airlines
Deal found 29/6£660
Thu 30/705:25
PHL
-
LGW
1 stop23h 35m
Multiple Airlines
Mon 17/814:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Deal found 28/6£660
Tue 25/809:25
PHL
-
LHR
1 stop16h 05m
JetBlue
Fri 28/808:40
LHR
-
PHL
1 stop16h 21m
JetBlue
Deal found 27/6£661
Wed 15/710:05
PHL
-
STN
2 stops20h 30m
Multiple Airlines
Wed 22/722:00
STN
-
PHL
2 stops28h 34m
Multiple Airlines
Deal found 28/6£661
Tue 1/913:15
PHL
-
LGW
2 stops21h 45m
Delta
Sat 12/910:25
LGW
-
PHL
2 stops19h 16m
Delta
Deal found 25/6£661
Sun 16/820:25
PHL
-
LTN
1 stop10h 00m
Multiple Airlines
Wed 26/806:15
LTN
-
PHL
1 stop17h 40m
Multiple Airlines
Deal found 26/6£661

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 30 June 2026.

Round-trip from

£657

One-way from

£179

Popular in

June

Cheapest in

September

Average price

£1,120

Good round-trip deal

£829 or less

Good one-way deal

£248 or less
9/8-16/8
  • 9/8-16/8
  • 4 total stops
  • 44h 54m total
  • Philadelphia to London
Search Deals
21/7
  • 21/7
  • 2 total stops
  • 36h 30m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 27% potential increase in price (£181 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£33 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
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 30 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 - LHR

PHLLHR

Philadelphia

Thu 8/10

12:09-06:25

1 stop13h 16m

London Heathrow

Mon 12/10

11:15-20:37

1 stop14h 22m

£674

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 29/9

10:35-06:25

1 stop14h 50m

London Heathrow

Sun 4/10

11:15-22:24

1 stop16h 09m

£674

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Fri 9/10

16:20-17:25

2 stops20h 05m

London Luton

Fri 16/10

06:20-15:41

2 stops14h 21m

£691

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 30/9

12:55-09:05

1 stop15h 10m

London Heathrow

Mon 5/10

20:35-13:50

1 stop22h 15m

£697

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Thu 13/8

20:25-12:25

1 stop11h 00m

London Luton

Wed 19/8

06:15-22:46

3 stops21h 31m

£700
Fastest return journey

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 12/10

18:45-06:50

Nonstop7h 05m

London Heathrow

Fri 16/10

13:45-16:40

Nonstop7h 55m

£701

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Thu 6/8

21:16-10:00

1 stop31h 44m

London Gatwick

Sun 9/8

14:00-08:47

1 stop23h 47m

£705

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Wed 7/10

20:25-12:35

1 stop11h 10m

London Luton

Tue 13/10

13:10-22:43

2 stops14h 33m

£707

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Tue 1/12

21:10-12:40

1 stop10h 30m

London City

Thu 10/12

07:50-15:50

1 stop13h 00m

£707

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 10/9

15:25-06:30

1 stop10h 05m

London Heathrow

Fri 25/9

08:40-18:04

1 stop14h 24m

£721

Flights are sorted by cheapest return flights first.

Deals found on 25/6

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

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 £1,384). 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 30 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.

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 74% 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.

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 30 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
11,765 reviews
Check prices

Crew

7.9

Entertainment

6.8

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
American Airlines
7.1
Good
11,765 reviews
American Airlines
7.1
Good
11,765 reviews
Check prices

Crew

7.9

Entertainment

6.8

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
JetBlue
7.1
Good
3,013 reviews
American Airlines
7.1
Good
11,765 reviews
Check prices

Crew

7.9

Entertainment

6.8

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
Iberia
7.0
Good
3,247 reviews
American Airlines
7.1
Good
11,765 reviews
Check prices

Crew

7.9

Entertainment

6.8

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
British Airways
6.7
Okay
8,088 reviews
American Airlines
7.1
Good
11,765 reviews
Check prices

Crew

7.9

Entertainment

6.8

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.

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 5 daily outbound flights to London from 2 different airlines.

  • How long is the flight from Philadelphia to London?

    For as low as £701, KLM 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 £390. Another option worth looking into is American Airlines, starting at £517 return. British Airways is currently priced 39% 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 Stansted.

  • 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 £813, our data indicates the cheapest price to be £248. The most popular route (Philadelphia - London Heathrow), is priced around £588.

  • 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 £1,384). 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
Hounslow
Milton Keynes
Luton
Wembley
Gatwick
Croydon
Slough
Ilford
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Eastbourne
Southall
Aylesbury
Romford
Ipswich
Borehamwood
Southend-on-Sea

Browse thousands of different options on Cheapflights for your next trip

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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 30 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£390Average£642FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£517Average£674FlexibilityNo 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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