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Cheap flights from Philadelphia to London from £155

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 22/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LON
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Philadelphia to London are usually found in September or August, 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 12 December 2025.

Wed 10/1216:32PHL - LHR
1 stop9h 23mJetBlue
Sun 8/209:20LHR - PHL
1 stop14h 03mJetBlue
Deal found 10/12£470
Sat 13/1216:42PHL - LHR
1 stop9h 13mJetBlue
Tue 27/109:20LHR - PHL
1 stop14h 03mJetBlue
Deal found 10/12£499
Sat 20/1214:30PHL - LHR
1 stop11h 25mJetBlue
Thu 25/1209:20LHR - PHL
1 stop13h 50mJetBlue
Deal found 10/12£559
Sat 13/1206:00PHL - LHR
1 stop19h 55mJetBlue
Tue 16/1209:20LHR - PHL
1 stop11h 17mJetBlue
Deal found 9/12£573
Thu 11/1210:24PHL - LHR
1 stop15h 31mJetBlue
Sun 14/1209:20LHR - PHL
1 stop17h 28mJetBlue
Deal found 10/12£575
Sun 14/1210:24PHL - LHR
1 stop15h 31mJetBlue
Tue 23/1209:20LHR - PHL
1 stop13h 50mJetBlue
Deal found 11/12£599
Mon 29/1208:40PHL - LHR
1 stop17h 15mJetBlue
Fri 9/109:20LHR - PHL
1 stop14h 03mJetBlue
Deal found 10/12£600
Sat 13/1216:42PHL - LHR
1 stop9h 13mMultiple Airlines
Tue 27/109:00LHR - PHL
2 stops18h 46mMultiple Airlines
Deal found 11/12£627
Thu 25/1216:35PHL - LTN
2 stops18h 25mMultiple Airlines
Sat 10/106:00LTN - PHL
2 stops21h 46mMultiple Airlines
Deal found 12/12£631
Sat 20/1214:30PHL - LHR
1 stop11h 25mJetBlue
Fri 26/1209:20LHR - PHL
1 stop13h 50mJetBlue
Deal found 10/12£644
Thu 25/1206:00PHL - LGW
2 stops23h 00mMultiple Airlines
Mon 12/114:00LGW - PHL
1 stop32h 43mMultiple Airlines
Deal found 10/12£649
Thu 25/1206:00PHL - LGW
2 stops47h 00mMultiple Airlines
Sat 10/114:00LGW - PHL
1 stop23h 37mMultiple Airlines
Deal found 12/12£659

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 12 December 2025.

Round-trip from

£453

One-way from

£155

Popular in

June

Cheapest in

September

Average price

£671

Good round-trip deal

£383 or less

Good one-way deal

£653 or less
13/2-16/2
  • 13/2-16/2
  • 6 total stops
  • 45h 37m total
  • Philadelphia to London
Search Deals
22/1
  • 22/1
  • 1 total stop
  • 31h 58m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£104 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 12 December 2025.
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 - LHR

PHLLHR

Philadelphia

Tue 10/3

11:16-18:30

2 stops27h 14m

London Heathrow

Thu 19/3

07:05-22:54

3 stops19h 49m

£473

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/2

13:30-06:55

1 stop12h 25m

London Heathrow

Tue 17/2

09:20-22:45

1 stop18h 25m

£476

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 12/1

06:02-09:20

2 stops22h 18m

London Heathrow

Tue 20/1

06:40-21:16

3 stops19h 36m

£476

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 10/3

15:02-06:55

1 stop11h 53m

London Heathrow

Thu 19/3

09:20-21:47

1 stop16h 27m

£476

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 11/1

06:02-09:20

2 stops22h 18m

London Heathrow

Fri 16/1

06:40-00:21

3 stops22h 41m

£476

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 28/4

08:20-06:30

1 stop17h 10m

London Heathrow

Thu 7/5

08:25-19:30

1 stop16h 05m

£488

PhiladelphiaLondon

PHL - LTN

PHLLTN

Philadelphia

Fri 13/2

16:05-20:10

3 stops23h 05m

London Luton

Mon 16/2

19:05-14:47

3 stops24h 42m

£491

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Fri 20/3

16:35-18:20

2 stops21h 45m

London Stansted

Thu 26/3

21:30-22:46

2 stops29h 16m

£494

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 26/1

12:16-17:40

2 stops24h 24m

London Heathrow

Fri 30/1

06:40-22:50

2 stops21h 10m

£494

PhiladelphiaLondon

PHL - STN

PHLSTN

Philadelphia

Wed 14/1

15:30-19:40

2 stops23h 10m

London Stansted

Tue 27/1

20:25-22:46

3 stops31h 21m

£494

Flights are sorted by cheapest return flights first.

Deals found on 11/12

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 5 December 2025.

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 £211). Flying from Philadelphia to London in June is currently the most expensive (average of £399). 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 12 December 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 50% on flights from Philadelphia to London by exploring options for tickets at midday.

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 12 December 2025.

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

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 69% 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.

Boston (BOS) is the most affordable one-stop option, with an average return flight price of £463.

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 48m.

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 41m.

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 12 December 2025.
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
11,049 reviews
Check prices

Boarding

7.5

Food

6.5

Entertainment

6.9

Crew

8.0

Comfort

7.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
American Airlines
7.2
Good
11,049 reviews
American Airlines
7.2
Good
11,049 reviews
Check prices

Boarding

7.5

Food

6.5

Entertainment

6.9

Crew

8.0

Comfort

7.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
JetBlue
7.2
Good
2,899 reviews
American Airlines
7.2
Good
11,049 reviews
Check prices

Boarding

7.5

Food

6.5

Entertainment

6.9

Crew

8.0

Comfort

7.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
Aer Lingus
7.2
Good
1,394 reviews
American Airlines
7.2
Good
11,049 reviews
Check prices

Boarding

7.5

Food

6.5

Entertainment

6.9

Crew

8.0

Comfort

7.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
Iberia
7.0
Good
3,045 reviews
American Airlines
7.2
Good
11,049 reviews
Check prices

Boarding

7.5

Food

6.5

Entertainment

6.9

Crew

8.0

Comfort

7.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
British Airways
6.7
Okay
7,571 reviews
American Airlines
7.2
Good
11,049 reviews
Check prices

Boarding

7.5

Food

6.5

Entertainment

6.9

Crew

8.0

Comfort

7.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

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 10 daily outbound flights to London from 4 different airlines.

  • How long is the flight from Philadelphia to London?

    For as low as £476, Scandinavian Airlines can have you in London from Philadelphia in 12h 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 £385. Additional return tickets that might be worth considering are offered by Aer Lingus and JetBlue, with the lowest prices starting at £392 and £428, 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 Finnair (85%), Malaysia Airlines (85%) or American Airlines (84%) 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 £1,089, our data indicates the cheapest price to be £327. The most popular route (Philadelphia - London Heathrow), is priced around £420.

  • 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 £211). Flying from Philadelphia to London in June is currently the most expensive (average of £399). 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 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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£385Average£554FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£392Average£692FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£428Average£521FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
American AirlinesCheapest£510Average£666FlexibilityNo 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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