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Cheap flights from Philadelphia to London from £220

PHL — LON
10 Dec — 17 Dec1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Philadelphia to London are usually found in January or February, booked 67 days in advance, depart on a Monday 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

Sun 6/1209:30 -
1 stop16h 25m
Mon 11/109:20 -
1 stop15h 18m
Deal found 9/11£611
Tue 8/1217:40 -
1 stop9h 35m
Sun 24/111:35 -
2 stops27h 01m
Deal found 8/11£612
Mon 16/1107:00 -
1 stop18h 55m
Wed 28/408:40 -
1 stop15h 12m
Deal found 10/11£613
Mon 16/1110:27 -
1 stop15h 28m
Wed 12/508:40 -
1 stop15h 12m
Deal found 7/11£614
Wed 9/1209:15 -
3 stops31h 10m
Sun 13/1206:25 -
2 stops21h 11m
Deal found 6/11£617
Sun 15/1107:00 -
1 stop18h 55m
Thu 19/1109:20 -
1 stop14h 34m
Deal found 5/11£618
Mon 16/1110:27 -
1 stop15h 28m
Sun 22/1109:20 -
1 stop14h 34m
Deal found 6/11£619
Tue 8/1217:40 -
1 stop9h 35m
Tue 15/1208:55 -
1 stop12h 15m
Deal found 9/11£620
Fri 4/1219:33 -
1 stop30h 22m
Wed 9/1209:20 -
1 stop14h 23m
Deal found 10/11£622
Mon 16/1110:27 -
1 stop15h 28m
Mon 23/1109:20 -
1 stop14h 34m
Deal found 8/11£623
Sun 6/1217:40 -
1 stop9h 10m
Thu 10/1218:25 -
2 stops43h 39m
Deal found 9/11£623
Mon 16/1115:20 -
2 stops26h 25m
Mon 23/1112:00 -
3 stops33h 05m
Deal found 5/11£626

Find flight deals from Philadelphia to London

Round-trip from

£610

One-way from

£220

Popular in

June

Cheapest in

January

Average price

£743

Good round-trip deal

£896 or less

Good one-way deal

£886 or less
JetBlue
  • JetBlue
  • 13/1-17/1
  • 2 total stops
  • 25h 33m total
  • Philadelphia to London
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JetBlue
  • JetBlue
  • 3/3-31/12
  • 1 total stop
  • 16h 30m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£140 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).
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Average for round-trip flights in November 2026
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Price to beat on a round-trip flight from Philadelphia to London (LON).
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Price to beat on a one-way flight from Philadelphia to London (LON).
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Cheapflights Fare Finder

 
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 Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 8/12

09:30-06:55

1 stop16h 25m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£223

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 23/3

14:37-09:10

2 stops14h 33m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£268

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Wed 10/3

13:00-09:00

2 stops15h 00m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£268

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sat 20/3

19:00-07:10

2 stops32h 10m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£271

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sat 1/5

11:05-07:25

2 stops39h 20m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£271

PhiladelphiaLondon

PHL Philadelphia - STN London Stansted

PHLSTN

Philadelphia

Tue 23/3

18:40-16:10

2 stops17h 30m

London Stansted

Wed 31/12

00:00-18:00

Nonstop0h 00m

£288

PhiladelphiaLondon

PHL Philadelphia - STN London Stansted

PHLSTN

Philadelphia

Thu 10/12

17:40-22:05

3 stops23h 25m

London Stansted

Wed 31/12

00:00-18:00

Nonstop0h 00m

£297

PhiladelphiaLondon

PHL Philadelphia - STN London Stansted

PHLSTN

Philadelphia

Mon 29/3

17:35-16:50

3 stops18h 15m

London Stansted

Wed 31/12

00:00-18:00

Nonstop0h 00m

£322

PhiladelphiaLondon

PHL Philadelphia - STN London Stansted

PHLSTN

Philadelphia

Sun 9/5

17:35-07:35

2 stops33h 00m

London Stansted

Wed 31/12

00:00-18:00

Nonstop0h 00m

£324

PhiladelphiaLondon

PHL Philadelphia - STN London Stansted

PHLSTN

Philadelphia

Sat 20/3

18:40-18:50

2 stops20h 10m

London Stansted

Wed 31/12

00:00-18:00

Nonstop0h 00m

£330

Flights are sorted by cheapest return flights first.

Deals found on 9/11

Showing 1-10 of 45 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

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 £560). Flying from Philadelphia to London in June is currently the most expensive (average of £1,105). 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?

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

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).

How much does it cost for a return flight from Philadelphia to London?

Airfare is below average for this route at the moment.
Philadelphia to London flights typically cost between £614 and £849 in January.
The cheapest return price found within the last 5 days was £610 on JetBlue (13 Jan–17 Jan).

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 66 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing London

Read reviews from past customers who have flown with American Airlines,Iberia, andBritish Airways 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
7.0
Good
12,227 reviews
Check prices

Crew

7.9

Comfort

7.2

Food

6.4

Entertainment

6.8

Overall

7.0

Boarding

7.4

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
7.0
Good
12,227 reviews
American Airlines
7.0
Good
12,227 reviews
Check prices

Crew

7.9

Comfort

7.2

Food

6.4

Entertainment

6.8

Overall

7.0

Boarding

7.4

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
3,230 reviews
American Airlines
7.0
Good
12,227 reviews
Check prices

Crew

7.9

Comfort

7.2

Food

6.4

Entertainment

6.8

Overall

7.0

Boarding

7.4

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
8,286 reviews
American Airlines
7.0
Good
12,227 reviews
Check prices

Crew

7.9

Comfort

7.2

Food

6.4

Entertainment

6.8

Overall

7.0

Boarding

7.4

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

  • 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 1 airline.

  • How long is the flight from Philadelphia to London?

    For as low as £644, 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 is the cheapest airline to fly from Philadelphia to London round-trip?

    Flying on British Airways is currently your cheapest option to London, with prices starting at £561. British Airways is currently priced 26% 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 (93%), American Airlines (92%) or British Airways (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 £942, our data indicates the cheapest price to be £434. The most popular route (Philadelphia - London Heathrow), is priced around £585.

  • 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 £560). Flying from Philadelphia to London in June is currently the most expensive (average of £1,105). 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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Croydon
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Enfield
Brentford
Dover
Harrow
Watford
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Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Philadelphia to London

AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£561Average£876FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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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?

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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.

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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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