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Cheap flights from Philadelphia to London from £165

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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
17 Aug — 24 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Philadelphia to London are usually found in November or September, booked 14 days in advance, depart on a Saturday or Tuesday 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 18 July 2026.

Thu 17/918:48
PHL
-
LHR
1 stop30h 42m
Multiple Airlines
Mon 21/908:40
LHR
-
PHL
2 stops17h 52m
Multiple Airlines
Deal found 16/7£654
Sun 27/910:45
PHL
-
LHR
1 stop14h 45m
Multiple Airlines
Tue 6/1006:50
LHR
-
PHL
2 stops13h 51m
Multiple Airlines
Deal found 16/7£655
Sun 2/809:12
PHL
-
LGW
1 stop19h 23m
JetBlue
Tue 25/812:20
LGW
-
PHL
1 stop12h 41m
JetBlue
Deal found 15/7£656
Tue 8/908:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Thu 17/908:40
LHR
-
PHL
1 stop14h 24m
JetBlue
Deal found 13/7£657
Sun 16/817:40
PHL
-
STN
3 stops25h 00m
Multiple Airlines
Tue 25/822:00
STN
-
PHL
2 stops29h 46m
Multiple Airlines
Deal found 16/7£657
Sat 29/820:25
PHL
-
LTN
1 stop14h 40m
Multiple Airlines
Sun 6/911:00
LTN
-
PHL
1 stop12h 55m
Multiple Airlines
Deal found 13/7£658
Sun 13/910:45
PHL
-
LHR
1 stop14h 45m
JetBlue
Mon 14/908:40
LHR
-
PHL
1 stop18h 52m
JetBlue
Deal found 16/7£658
Wed 19/820:25
PHL
-
STN
1 stop18h 05m
Multiple Airlines
Tue 25/822:00
STN
-
PHL
3 stops29h 46m
Multiple Airlines
Deal found 13/7£658
Thu 30/718:18
PHL
-
LGW
2 stops58h 42m
Multiple Airlines
Sat 22/814:00
LGW
-
PHL
1 stop22h 34m
Multiple Airlines
Deal found 16/7£658
Sun 16/809:12
PHL
-
LHR
1 stop16h 18m
JetBlue
Tue 25/808:40
LHR
-
PHL
1 stop16h 21m
JetBlue
Deal found 15/7£658
Tue 11/810:50
PHL
-
STN
2 stops20h 55m
Multiple Airlines
Sun 16/822:00
STN
-
PHL
2 stops21h 49m
Multiple Airlines
Deal found 15/7£658
Mon 3/806:30
PHL
-
LGW
2 stops22h 30m
Multiple Airlines
Mon 10/814:00
LGW
-
PHL
1 stop23h 52m
Multiple Airlines
Deal found 14/7£658

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 18 July 2026.

Round-trip from

£654

One-way from

£165

Popular in

June

Cheapest in

November

Average price

£858

Good round-trip deal

£822 or less

Good one-way deal

£244 or less
Air Canada
  • Air Canada
  • 17/9-21/9
  • 3 total stops
  • 48h 34m total
  • Philadelphia to London
Search Deals
6/8
  • 6/8
  • 2 total stops
  • 39h 28m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (£187 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£32 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 18 July 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

Sat 15/8

20:25-16:05

1 stop14h 40m

London Luton

Mon 24/8

08:15-18:55

1 stop15h 40m

£664

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 26/10

10:30-06:55

1 stop16h 25m

London Heathrow

Sun 1/11

09:20-17:32

1 stop13h 12m

£665

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Mon 21/9

20:25-07:50

1 stop30h 25m

London Stansted

Tue 6/10

06:30-18:55

2 stops17h 25m

£665

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 10/10

11:00-12:55

3 stops20h 55m

London Heathrow

Mon 12/10

06:40-22:07

2 stops20h 27m

£678

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Tue 18/8

20:25-17:35

1 stop16h 10m

London Stansted

Tue 25/8

08:30-22:46

2 stops19h 16m

£686

PhiladelphiaLondon

PHL - LCY

PHLLCY

Philadelphia

Mon 26/10

22:10-12:40

1 stop10h 30m

London City

Fri 30/10

07:50-16:50

1 stop13h 00m

£687

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Sat 29/8

20:25-16:05

1 stop14h 40m

London Luton

Sat 5/9

09:00-18:55

1 stop14h 55m

£687

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Tue 18/8

20:25-13:25

1 stop12h 00m

London Luton

Tue 25/8

09:40-22:46

2 stops18h 06m

£690

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 7/10

10:45-12:45

2 stops21h 00m

London Heathrow

Tue 13/10

06:00-09:50

2 stops32h 50m

£725

PhiladelphiaLondon

PHL - LGW

PHLLGW

Philadelphia

Mon 21/9

15:25-15:35

2 stops19h 10m

London Gatwick

Tue 6/10

10:35-09:50

2 stops28h 15m

£725

Flights are sorted by cheapest return flights first.

Deals found on 18/7

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, September is the cheapest month in which you can book a flight from Philadelphia to London (average of £514). Flying from Philadelphia to London in June is currently the most expensive (average of £1,103). 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 18 July 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 18 July 2026.

The most flights from PHL to LON are scheduled on a Wednesday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (10 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 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 £436.

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 18 July 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
11,825 reviews
Check prices

Entertainment

6.8

Crew

7.9

Overall

7.1

Boarding

7.5

Comfort

7.2

Food

6.4

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
11,825 reviews
American Airlines
7.1
Good
11,825 reviews
Check prices

Entertainment

6.8

Crew

7.9

Overall

7.1

Boarding

7.5

Comfort

7.2

Food

6.4

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
3,012 reviews
American Airlines
7.1
Good
11,825 reviews
Check prices

Entertainment

6.8

Crew

7.9

Overall

7.1

Boarding

7.5

Comfort

7.2

Food

6.4

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
3,257 reviews
American Airlines
7.1
Good
11,825 reviews
Check prices

Entertainment

6.8

Crew

7.9

Overall

7.1

Boarding

7.5

Comfort

7.2

Food

6.4

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
8,122 reviews
American Airlines
7.1
Good
11,825 reviews
Check prices

Entertainment

6.8

Crew

7.9

Overall

7.1

Boarding

7.5

Comfort

7.2

Food

6.4

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 12 daily outbound flights to London from 2 different airlines.

  • How long is the flight from Philadelphia to London?

    For as low as £665, JetBlue can have you in London from Philadelphia in 16h 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 £383. Another option worth looking into is American Airlines, starting at £508 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 City.

  • What are the most reliable airlines from Philadelphia to London?

    Consider Malaysia Airlines (83%), American Airlines (78%) or Finnair (78%) 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 £811, our data indicates the cheapest price to be £244. The most popular route (Philadelphia - London Heathrow), is priced around £589.

  • 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, September is the cheapest month in which you can book a flight from Philadelphia to London (average of £514). Flying from Philadelphia to London in June is currently the most expensive (average of £1,103). 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
Gatwick
Wembley
Slough
Ilford
Croydon
Hayes
Brentford
Colchester
Watford
Eastbourne
Southend-on-Sea
Kingston upon Thames
Southall
Aylesbury
Romford
Enfield
Borehamwood

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 18 July 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£383Average£665FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£508Average£696FlexibilityNo 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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