How long is the flight from London to Philadelphia?

There are many flights that can get you from London to Philadelphia in 17h 08m. Fly via United Airlines, Delta, or TAP AIR PORTUGAL to get the fastest option. London and Philadelphia are separated by a distance of 3533 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from London to Philadelphia round-trip?

Cheapflights users have booked flights from London to Philadelphia round-trip from £300. Other airlines that can offer you cheap pricing are Icelandair, from £332, and Air Canada, from £334. You may be able to fly from London to Philadelphia for 45% less than the average price by searching for these airlines.

In terms of precipitation, rainfall in Philadelphia ranges from 69.0 - 112.0 inches per month. July is typically the wettest month, when rainfall can reach 112.0 mm. February is typically the driest time to visit Philadelphia when rainfall is around 69.0 mm.

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 1.0 C).

What are the most popular routes from London to Philadelphia?

When deciding which route to take from London to Philadelphia consider London Heathrow - Philadelphia, London Gatwick - Philadelphia or London City - Philadelphia as they are the most popular.

What are the cheapest flights from London to Philadelphia?

Looking at all options, your cheapest flight can be booked for £465. While the most popular route (London Heathrow - Philadelphia) can be booked for £393 on average, our data indicates £777 when flying from London to Philadelphia.

What are the most reliable airlines from London to Philadelphia?

Consider Aer Lingus (74%), American Airlines (66%) or Finnair (66%) when booking your flight. These represent the most reliable airlines when flying from London to Philadelphia.

What are the most popular airlines that fly from London to Philadelphia?

Before booking your flight from London to Philadelphia check out the most popular airlines for this route: American Airlines, Air Canada or Finnair.

What is the cheapest day to fly round-trip from London to Philadelphia?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 10% on the overall cost on flights from London to Philadelphia.

How far in advance should I book a flight from London to Philadelphia?

Travelers have found it’s best to book a flight 17 days in advance to save up to 46% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 17 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Philadelphia 1-2 weeks in advance for as low as £481, or £769 for flights within the next 24 hours.

What is the cheapest month to fly from London to Philadelphia?

February is one of the best times of the year to fly to Philadelphia from London. Prices for February average £546 per person but you can even find prices for as low as £387. The most expensive prices can be found in the month of August. Opting for a February flight can save you 23% on your journey compared to booking in August

What airport do you fly into for flights to Philadelphia from London?

If you book a flight to Philadelphia from London, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 14 flights from London to Philadelphia per day from 11 different airlines.

Can I find deals for flights from London to Philadelphia that include hotel bookings?

Yes. In addition to deals on London to Philadelphia flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from London to Philadelphia?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Philadelphia.

Can I find deals for business class flights from London to Philadelphia?

Yes. Cheapflights offers flight deals from London to Philadelphia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£385+ Cheap Flights from London to Philadelphia

Cheapflights Tip: The best prices from London to Philadelphia are usually found in February or September, booked 16 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from London to Philadelphia

Round-trip from	£448
One-way from	£385
Popular in	August
Cheapest in	February
Average price	£498
Good round-trip deal	£511 or less
Good one-way deal	£560 or less

Air Canada
11/10-12/10
3 total stops
39h 03m total
London to Philadelphia

Search Deals

3/11
3 total stops
28h 20m total
London to Philadelphia

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (£31 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Price to beat on a round-trip flight from London (LON) to Philadelphia.

Search Deals

Price to beat on a one-way flight from London (LON) to Philadelphia.

Search Deals

Find flight deals from London to Philadelphia

Cheapest flights from London to Philadelphia
Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Sat 11/1006:50LHR - PHL

2 stops19h 48mAir Canada

Sun 12/1009:20PHL - LHR

1 stop19h 15mAir Canada

Deal found 11/9£448

Fri 7/1114:00LGW - PHL

2 stops26h 29mMultiple Airlines

Thu 4/1207:00PHL - LGW

1 stop22h 00mMultiple Airlines

Deal found 11/9£448

Thu 25/908:15STN - PHL

1 stop15h 45mMultiple Airlines

Sun 28/920:30PHL - STN

1 stop15h 25mMultiple Airlines

Deal found 11/9£449

Fri 5/1206:50LHR - PHL

2 stops12h 57mAir Canada

Tue 6/115:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 12/9£449

Sun 26/1007:40LHR - PHL

2 stops17h 41mUnited Airlines

Sun 2/1120:00PHL - LHR

2 stops30h 10mUnited Airlines

Deal found 11/9£450

Mon 3/1114:00LGW - PHL

1 stop16h 24mMultiple Airlines

Sat 6/1211:50PHL - LGW

2 stops17h 15mMultiple Airlines

Deal found 11/9£450

Wed 24/910:05LHR - PHL

Nonstop8h 00mBritish Airways

Wed 1/1022:15PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 12/9£450

Mon 22/912:05LHR - PHL

2 stops14h 33mAir Canada

Mon 29/915:25PHL - LHR

2 stops15h 25mAir Canada

Deal found 12/9£451

Fri 28/1113:30LHR - PHL

2 stops14h 26mMultiple Airlines

Wed 3/1213:15PHL - LHR

2 stops12h 55mMultiple Airlines

Deal found 10/9£452

Sun 21/906:50LHR - PHL

2 stops12h 48mAir Canada

Sun 28/910:35PHL - LHR

2 stops14h 55mAir Canada

Deal found 10/9£453

Thu 11/1214:00LGW - PHL

1 stop22h 29mMultiple Airlines

Thu 8/122:00PHL - LGW

1 stop31h 00mMultiple Airlines

Deal found 11/9£453

Sat 1/1114:00LGW - PHL

1 stop22h 30mMultiple Airlines

Thu 4/1207:00PHL - LGW

1 stop22h 00mMultiple Airlines

Deal found 11/9£454

Best flights from London to Philadelphia
Discover carefully curated flight deals from London to Philadelphia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 September 2025.

Fri 7/1114:00LGW - PHL

2 stops26h 29mMultiple Airlines

Thu 4/1207:00PHL - LGW

1 stop22h 00mMultiple Airlines

Deal found 11/9£448

Tue 30/909:30LHR - PHL

1 stop17h 08mUnited Airlines

Fri 7/1115:30PHL - LHR

1 stop10h 40mUnited Airlines

Deal found 11/9£458

Mon 10/1106:30LHR - PHL

2 stops17h 59mDelta

Tue 18/1109:37PHL - LHR

2 stops16h 13mDelta

Deal found 12/9£465

Mon 22/912:30LHR - PHL

Nonstop8h 00mBritish Airways

Mon 29/919:50PHL - LHR

Nonstop7h 15mBritish Airways

Deal found 12/9£467

Thu 25/908:45LCY - PHL

1 stop12h 15mLufthansa

Sun 28/917:35PHL - LCY

1 stop17h 50mLufthansa

Deal found 11/9£530

Tue 21/1010:35LGW - PHL

2 stops27h 58mTAP AIR PORTUGAL

Tue 4/1109:22PHL - LGW

2 stops19h 28mTAP AIR PORTUGAL

Deal found 10/9£532

Thu 25/908:15STN - PHL

1 stop15h 45mMultiple Airlines

Sun 28/920:30PHL - STN

1 stop15h 25mMultiple Airlines

Deal found 11/9£449

Tue 16/1208:30LHR - PHL

1 stop12h 30mUnited Airlines

Mon 29/1210:39PHL - LHR

1 stop15h 01mUnited Airlines

Deal found 11/9£460

Mon 10/1106:30LHR - PHL

2 stops15h 20mDelta

Wed 19/1106:02PHL - LHR

1 stop19h 48mDelta

Deal found 12/9£465

Sat 29/1113:00LHR - PHL

1 stop14h 56mUnited Airlines

Mon 1/1218:31PHL - LHR

1 stop11h 44mUnited Airlines

Deal found 11/9£462

Mon 10/1106:30LHR - PHL

2 stops15h 20mDelta

Mon 17/1108:00PHL - LHR

2 stops17h 20mDelta

Deal found 12/9£467

Wed 8/1014:00LGW - PHL

2 stops30h 54mMultiple Airlines

Wed 15/1006:19PHL - LGW

2 stops22h 41mMultiple Airlines

Deal found 10/9£469

Direct flights from London to Philadelphia
Explore direct flight options from London to Philadelphia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 September 2025.

Wed 24/910:05LHR - PHL

Nonstop8h 00mBritish Airways

Wed 1/1022:15PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 12/9£450

Wed 8/1012:30LHR - PHL

Nonstop8h 05mBritish Airways

Wed 15/1019:50PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 10/9£451

Tue 28/1010:15LHR - PHL

Nonstop8h 00mBritish Airways

Tue 11/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 10/9£454

Tue 23/910:05LHR - PHL

Nonstop8h 00mFinnair

Tue 30/922:15PHL - LHR

Nonstop7h 05mFinnair

Deal found 12/9£460

Wed 8/1012:30LHR - PHL

Nonstop8h 05mFinnair

Wed 15/1019:50PHL - LHR

Nonstop7h 05mFinnair

Deal found 10/9£461

Tue 23/910:05LHR - PHL

Nonstop8h 00mBritish Airways

Wed 1/1022:15PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 11/9£462

Mon 22/912:30LHR - PHL

Nonstop8h 00mBritish Airways

Mon 29/919:50PHL - LHR

Nonstop7h 15mBritish Airways

Deal found 10/9£464

Mon 9/313:10LHR - PHL

Nonstop8h 05mBritish Airways

Mon 16/319:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 11/9£465

Mon 15/1213:10LHR - PHL

Nonstop8h 05mBritish Airways

Mon 29/1218:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 11/9£470

Last-minute flights from London to Philadelphia
Discover last-minute flight deals from London to Philadelphia. Data last updated 12 September 2025 and is based on user searches.

Thu 11/914:00LGW - PHL

1 stop15h 52mMultiple Airlines

Mon 10/1122:32PHL - LGW

2 stops26h 28mMultiple Airlines

Deal found 11/9£461

Thu 11/914:00LGW - PHL

1 stop14h 59mMultiple Airlines

Tue 4/1106:19PHL - LGW

2 stops42h 41mMultiple Airlines

Deal found 10/9£464

Fri 12/914:00LGW - PHL

1 stop14h 59mMultiple Airlines

Mon 10/1119:04PHL - LGW

2 stops29h 56mMultiple Airlines

Deal found 11/9£456

Mon 15/914:00LGW - PHL

1 stop28h 02mMultiple Airlines

Thu 18/919:46PHL - LGW

2 stops33h 14mMultiple Airlines

Deal found 11/9£458

Wed 17/909:30LHR - PHL

1 stop17h 08mAir Canada

Sat 8/1115:30PHL - LHR

2 stops24h 05mAir Canada

Deal found 10/9£457

Sun 21/906:50LHR - PHL

2 stops12h 48mAir Canada

Sun 28/910:35PHL - LHR

2 stops14h 55mAir Canada

Deal found 10/9£453

Mon 22/912:05LHR - PHL

2 stops14h 33mAir Canada

Mon 29/915:25PHL - LHR

2 stops15h 25mAir Canada

Deal found 12/9£451

Mon 22/909:40LHR - PHL

1 stop12h 12mVirgin Atlantic

Mon 29/917:32PHL - LHR

1 stop11h 58mVirgin Atlantic

Deal found 10/9£456

Mon 22/909:30LHR - PHL

1 stop17h 08mUnited Airlines

Mon 29/919:58PHL - LHR

1 stop9h 42mUnited Airlines

Deal found 11/9£456

Mon 22/906:50LHR - PHL

2 stops13h 58mMultiple Airlines

Mon 29/915:25PHL - LHR

2 stops13h 15mMultiple Airlines

Deal found 11/9£458

Mon 22/910:05LHR - PHL

Nonstop8h 00mBritish Airways

Mon 29/917:14PHL - LHR

1 stop9h 36mBritish Airways

Deal found 11/9£461

Thu 25/908:15STN - PHL

1 stop15h 45mMultiple Airlines

Sun 28/920:30PHL - STN

1 stop15h 25mMultiple Airlines

Deal found 11/9£449

One-way flights from London to Philadelphia
Search for one-way flight options from London to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 12 September 2025.

Mon 3/1121:20STN - PHL

3 stops28h 20mMultiple Airlines

Deal found 11/9£385

Mon 15/1214:00LGW - PHL

1 stop31h 49mMultiple Airlines

Deal found 10/9£385

Fri 10/1007:05LHR - PHL

3 stops44h 25mMultiple Airlines

Deal found 10/9£387

Wed 5/1113:45STN - PHL

3 stops27h 51mMultiple Airlines

Deal found 11/9£388

Mon 29/919:20LGW - PHL

3 stops56h 09mMultiple Airlines

Deal found 10/9£391

Sun 30/1118:05SEN - PHL

2 stops26h 55mMultiple Airlines

Deal found 10/9£391

Sun 30/1118:40LTN - PHL

2 stops26h 20mMultiple Airlines

Deal found 10/9£391

Thu 25/921:25LHR - PHL

3 stops41h 21mMultiple Airlines

Deal found 10/9£391

Sun 9/1113:00LGW - PHL

3 stops27h 24mMultiple Airlines

Deal found 11/9£391

Thu 27/1106:15LHR - PHL

1 stop14h 25mMultiple Airlines

Deal found 10/9£392

Sun 12/1009:50LGW - PHL

3 stops40h 07mMultiple Airlines

Deal found 11/9£392

Thu 6/1106:50LCY - PHL

1 stop12h 05mMultiple Airlines

Deal found 11/9£393

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Fri 7/11

14:00-11:29

2 stops26h 29m

Philadelphia

Thu 4/12

07:00-10:00

1 stop22h 00m

£448

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Thu 25/9

08:15-19:00

1 stop15h 45m

Philadelphia

Sun 28/9

20:30-16:55

1 stop15h 25m

£449

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 30/9

09:30-21:38

1 stop17h 08m

Philadelphia

Fri 7/11

15:30-07:10

1 stop10h 40m

£458

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 16/12

08:30-16:00

1 stop12h 30m

Philadelphia

Mon 29/12

10:39-06:40

1 stop15h 01m

£460

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 29/11

13:00-22:56

1 stop14h 56m

Philadelphia

Mon 1/12

18:31-11:15

1 stop11h 44m

£462

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 28/9

08:30-15:49

1 stop12h 19m

Philadelphia

Fri 7/11

15:30-07:10

1 stop10h 40m

£463

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 10/11

06:30-19:29

2 stops17h 59m

Philadelphia

Tue 18/11

09:37-06:50

2 stops16h 13m

£465

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 10/11

06:30-16:50

2 stops15h 20m

Philadelphia

Wed 19/11

06:02-06:50

1 stop19h 48m

£465

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 10/11

06:30-16:50

2 stops15h 20m

Philadelphia

Mon 17/11

08:00-06:20

2 stops17h 20m

£467

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 22/9

12:30-15:30

Nonstop8h 00m

Philadelphia

Mon 29/9

19:50-08:05

Nonstop7h 15m

£467

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 60 results

...

Best time to book a flight from London to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from London 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 London to Philadelphia

How far ahead should I book a flight from London to Philadelphia?

The price you pay for your flight from London to Philadelphia may vary depending on when you book. For the best chance of a lower fare, look to book 16 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 London to Philadelphia?

Currently, March is the cheapest month in which you can book a flight from London to Philadelphia (average of £648). Flying from London to Philadelphia in July is currently the most expensive (average of £839). 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 LON to PHL?

It’s optimal to fly from London to Philadelphia in the afternoon. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight at midday.

What is the cheapest day to fly from London to Philadelphia?

Travellers seeking maximum savings on their London to Philadelphia flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to Philadelphia

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

What’s the top stopover airport for flights from London to Philadelphia?

Dublin (DUB) – chosen by Cheapflights users on 39% of one-stop itineraries from London to Philadelphia on Cheapflights.

What’s the cheapest stopover airport for flights from London to Philadelphia?

Boston (BOS) is the most affordable one-stop option, with an average return flight price of £493.

What’s the fastest stopover option from London to Philadelphia?

Flights via Washington, D.C. (IAD) have the shortest average one-way travel time for one-stop routes: 11h 36m.

Which airport typically offers the quickest stopover for flights from London to Philadelphia?

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 37m.

Reviews of airlines servicing Philadelphia

See what other customers who have flown with Finnair, United Airlines, andAer Lingus from London to Philadelphia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Finnair

7.6

Good

1,323 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

United Airlines

7.4

Good

8,937 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Aer Lingus

7.2

Good

1,271 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Iberia

7.0

Good

2,929 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,361 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Related info for your journey

What airport do you fly into for flights to Philadelphia from London?
If you book a flight to Philadelphia from London, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 14 flights from London to Philadelphia per day from 11 different airlines.
How long is the flight from London to Philadelphia?
There are many flights that can get you from London to Philadelphia in 17h 08m. Fly via United Airlines, Delta, or TAP AIR PORTUGAL to get the fastest option. London and Philadelphia are separated by a distance of 3533 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from London to Philadelphia round-trip?
Cheapflights users have booked flights from London to Philadelphia round-trip from £300. Other airlines that can offer you cheap pricing are Icelandair, from £332, and Air Canada, from £334. You may be able to fly from London to Philadelphia for 45% less than the average price by searching for these airlines.
What are the most popular routes from London to Philadelphia?
When deciding which route to take from London to Philadelphia consider London Heathrow - Philadelphia, London Gatwick - Philadelphia or London City - Philadelphia as they are the most popular.
What are the most reliable airlines from London to Philadelphia?
Consider Aer Lingus (74%), American Airlines (66%) or Finnair (66%) when booking your flight. These represent the most reliable airlines when flying from London to Philadelphia.
What are the cheapest flights from London to Philadelphia?
Looking at all options, your cheapest flight can be booked for £465. While the most popular route (London Heathrow - Philadelphia) can be booked for £393 on average, our data indicates £777 when flying from London to Philadelphia.
Can I find deals for flights from London to Philadelphia that include hotel bookings?
Yes. In addition to deals on London to Philadelphia flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Philadelphia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Philadelphia.
Can I find deals for business class flights from London to Philadelphia?
Yes. Cheapflights offers flight deals from London to Philadelphia 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 London to Philadelphia?
Currently, March is the cheapest month in which you can book a flight from London to Philadelphia (average of £648). Flying from London to Philadelphia in July is currently the most expensive (average of £839). 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

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from London to Philadelphia

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£300	Average£431	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Icelandair	Cheapest£332	Average£482	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£334	Average£470	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
JetBlue	Cheapest£355	Average£488	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Lufthansa	Cheapest£408	Average£513	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£431	Average£574	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£439	Average£559	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£442	Average£584	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Aer Lingus	Cheapest£448	Average£627	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Iberia	Cheapest£465	Average£566	FlexibilityNo cancel fee	On-time77%	Search Iberia flights

Fly with Cheapflights

How does Cheapflights help users find flights from London to Philadelphia?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Philadelphia from London today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from London to Philadelphia?

Cheapflights helps you find that perfect flight to Philadelphia from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from London to Philadelphia with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Philadelphia flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to Philadelphia become cheaper?

Of course! You can now track prices for flights from London to Philadelphia and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from London to Philadelphia from £385

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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to Philadelphia are usually found in February or September, booked 16 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from London to Philadelphia

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from London to Philadelphia

Cheapest flights from London to PhiladelphiaExplore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

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Use the filters below to find and compare flights from London to Philadelphia that are best for you.

Best time to book a flight from London to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from London with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London to Philadelphia

How far ahead should I book a flight from London to Philadelphia?

Use this chart to determine the optimal time to book a return flight from London to Philadelphia. Price data was last updated on 29 August 2025.

What is the cheapest month to book a flight from London to Philadelphia?

What is the cheapest time of day to fly from LON to PHL?

Find hourly flight availability from London to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 September 2025.

What is the cheapest day to fly from London to Philadelphia?

Use this chart to determine the cheapest time to fly return from London to Philadelphia. Price data was last updated on 16 December 2024.

Weekly flight availability from London to Philadelphia

What’s the top stopover airport for flights from London to Philadelphia?

Share of one-stop return flights from London to Philadelphia chosen by Cheapflights users in the past 12 months, using the same stopover each way.

What’s the cheapest stopover airport for flights from London to Philadelphia?

Average return fare for one-stop flights from London to Philadelphia, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

What’s the fastest stopover option from London to Philadelphia?

Shortest average travel time for one-stop one-way flights from London to Philadelphia, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Which airport typically offers the quickest stopover for flights from London to Philadelphia?

Average stopover duration for one-stop one-way flights from London to Philadelphia, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Philadelphia

See what other customers who have flown with Finnair, United Airlines, andAer Lingus from London to Philadelphia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to Philadelphia. 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 into for flights to Philadelphia from London?

How long is the flight from London to Philadelphia?

What are the cheapest airlines flying from London to Philadelphia round-trip?

What are the most popular routes from London to Philadelphia?

What are the most reliable airlines from London to Philadelphia?

What are the cheapest flights from London to Philadelphia?

Can I find deals for flights from London to Philadelphia that include hotel bookings?

How can I find direct flights from London to Philadelphia?

Can I find deals for business class flights from London to Philadelphia?

What is the cheapest month to book a flight from London to Philadelphia?

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Fly from London to Philadelphia on these airlines

Choose from the following airlines for your flight from London to Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on 12 September 2025.

Top 10 airlines flying from London to Philadelphia

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Cheapest flights from London to Philadelphia
Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.