How long is the flight from London to Philadelphia?

There are many flights that can get you from London to Philadelphia in 17h 04m. Fly via JetBlue, United Airlines, or Air Canada 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 £306. Other airlines that can offer you cheap pricing are Icelandair, from £338, and Air Canada, from £340. 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 cheapest airlines to fly from London to Philadelphia one-way?

£369 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Delta and JetBlue, with prices starting from £370 and £373, respectively.

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 £359. While the most popular route (London Heathrow - Philadelphia) can be booked for £416 on average, our data indicates £736 when flying from London to Philadelphia.

What are the most reliable airlines from London to Philadelphia?

Consider Malaysia Airlines (78%), Iberia (75%) or Finnair (74%) 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: British Airways, Finnair or Iberia.

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.

£369+ 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

Find flight deals from London to Philadelphia

Enter your travel dates to find the best prices.

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 15 October 2025.

Mon 24/1109:20LHR - PHL

1 stop27h 34mJetBlue

Mon 12/113:30PHL - LHR

1 stop12h 25mJetBlue

Deal found 14/10£444

Mon 17/1113:25LHR - PHL

1 stop30h 22mAir Canada

Mon 24/1109:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 14/10£446

Mon 10/1109:20LHR - PHL

1 stop11h 37mJetBlue

Mon 17/1106:00PHL - LHR

1 stop19h 55mJetBlue

Deal found 13/10£446

Tue 11/1113:25LHR - PHL

2 stops38h 21mAir Canada

Tue 18/1115:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 14/10£447

Tue 25/1108:30LHR - PHL

1 stop12h 35mMultiple Airlines

Wed 10/1216:35PHL - LHR

2 stops33h 35mMultiple Airlines

Deal found 14/10£451

Mon 10/1113:25LHR - PHL

1 stop30h 22mAir Canada

Mon 17/1109:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 13/10£452

Wed 26/1109:00LHR - PHL

2 stops18h 46mAir Canada

Mon 1/1209:20PHL - LHR

2 stops30h 15mAir Canada

Deal found 12/10£452

Wed 12/1106:50LHR - PHL

2 stops12h 57mAir Canada

Wed 19/1109:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 13/10£453

Tue 18/1112:20LHR - PHL

2 stops32h 37mIcelandair

Thu 27/1106:00PHL - LHR

1 stop19h 55mIcelandair

Deal found 13/10£455

Sun 9/1113:45LHR - PHL

2 stops38h 01mAir Canada

Thu 20/1109:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 14/10£455

Fri 14/1109:00LHR - PHL

2 stops34h 47mAir Canada

Sun 23/1109:20PHL - LHR

2 stops30h 15mAir Canada

Deal found 13/10£456

Mon 10/1114:05STN - PHL

3 stops31h 00mMultiple Airlines

Mon 17/1109:20PHL - STN

3 stops31h 45mMultiple Airlines

Deal found 13/10£461

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 15 October 2025.

Tue 20/109:20LHR - PHL

1 stop17h 04mJetBlue

Wed 4/213:30PHL - LHR

1 stop12h 25mJetBlue

Deal found 14/10£444

Wed 31/1213:30LHR - PHL

1 stop31h 35mUnited Airlines

Thu 15/109:20PHL - LHR

2 stops30h 15mUnited Airlines

Deal found 14/10£449

Sat 24/114:00LGW - PHL

1 stop13h 46mMultiple Airlines

Sun 8/222:00PHL - LGW

1 stop31h 00mMultiple Airlines

Deal found 14/10£460

Tue 20/113:25LHR - PHL

1 stop30h 22mAir Canada

Wed 4/209:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 14/10£464

Thu 4/1210:40LGW - PHL

2 stops27h 59mTAP AIR PORTUGAL

Mon 8/1210:24PHL - LGW

2 stops24h 21mTAP AIR PORTUGAL

Deal found 13/10£518

Wed 28/113:25LHR - PHL

2 stops31h 24mMultiple Airlines

Thu 12/215:30PHL - LHR

1 stop10h 40mMultiple Airlines

Deal found 14/10£464

Sun 7/1209:30LHR - PHL

2 stops34h 17mUnited Airlines

Mon 22/1216:35PHL - LHR

2 stops47h 00mUnited Airlines

Deal found 14/10£467

Thu 5/309:20LHR - PHL

1 stop11h 32mJetBlue

Mon 9/316:48PHL - LHR

1 stop10h 07mJetBlue

Deal found 14/10£474

Mon 12/109:20LHR - PHL

1 stop17h 04mJetBlue

Sun 1/213:30PHL - LHR

1 stop12h 25mJetBlue

Deal found 14/10£475

Mon 15/1208:50LTN - PHL

1 stop12h 10mMultiple Airlines

Tue 30/1217:30PHL - LTN

1 stop11h 15mMultiple Airlines

Deal found 14/10£479

Thu 15/110:10LGW - PHL

3 stops40h 14mTAP AIR PORTUGAL

Fri 30/113:30PHL - LGW

2 stops21h 15mTAP AIR PORTUGAL

Deal found 14/10£529

Fri 16/109:20LHR - PHL

1 stop17h 04mJetBlue

Thu 29/113:30PHL - LHR

1 stop12h 25mJetBlue

Deal found 14/10£475

Mon 10/1114:00LGW - PHL

1 stop35h 14mMultiple Airlines

Mon 17/1113:57PHL - LGW

1 stop15h 03mMultiple Airlines

Deal found 13/10£487

Thu 4/1210:10LGW - PHL

3 stops28h 29mTAP AIR PORTUGAL

Tue 9/1210:24PHL - LGW

2 stops18h 26mTAP AIR PORTUGAL

Deal found 13/10£536

Sun 18/109:20LHR - PHL

1 stop17h 04mJetBlue

Thu 29/113:30PHL - LHR

1 stop12h 25mJetBlue

Deal found 13/10£476

Thu 8/108:30LGW - PHL

2 stops29h 20mMultiple Airlines

Fri 23/105:15PHL - LGW

2 stops23h 45mMultiple Airlines

Deal found 14/10£489

Wed 14/109:20LHR - PHL

1 stop17h 04mJetBlue

Sat 31/113:30PHL - LHR

1 stop12h 25mJetBlue

Deal found 13/10£476

Mon 10/1109:50LCY - PHL

2 stops28h 56mMultiple Airlines

Mon 17/1112:40PHL - LCY

2 stops19h 10mMultiple Airlines

Deal found 13/10£505

Wed 3/1209:50LCY - PHL

2 stops28h 45mMultiple Airlines

Tue 9/1220:05PHL - LCY

2 stops15h 35mMultiple Airlines

Deal found 14/10£509

Mon 17/1114:00LGW - PHL

1 stop35h 14mMultiple Airlines

Mon 24/1106:15PHL - LGW

1 stop22h 45mMultiple Airlines

Deal found 14/10£510

Thu 4/1210:40LGW - PHL

2 stops27h 59mMultiple Airlines

Mon 8/1210:24PHL - LGW

2 stops18h 26mMultiple Airlines

Deal found 13/10£518

Wed 26/1106:30STN - PHL

1 stop14h 30mMultiple Airlines

Mon 1/1210:40PHL - STN

2 stops16h 10mMultiple Airlines

Deal found 12/10£519

Mon 12/109:50LCY - PHL

2 stops33h 20mMultiple Airlines

Tue 27/115:01PHL - LCY

2 stops13h 14mMultiple Airlines

Deal found 14/10£519

Tue 20/109:15LCY - PHL

2 stops38h 39mMultiple Airlines

Wed 4/219:45PHL - LCY

2 stops16h 55mMultiple Airlines

Deal found 14/10£526

Wed 26/1109:50LCY - PHL

2 stops28h 56mMultiple Airlines

Wed 3/1220:05PHL - LCY

2 stops16h 35mMultiple Airlines

Deal found 12/10£527

Tue 25/1109:50LCY - PHL

2 stops28h 56mMultiple Airlines

Wed 10/1220:05PHL - LCY

2 stops16h 35mMultiple Airlines

Deal found 14/10£528

Wed 28/109:25LCY - PHL

2 stops38h 29mMultiple Airlines

Thu 12/215:05PHL - LCY

2 stops16h 45mMultiple Airlines

Deal found 14/10£531

Wed 26/1109:50LCY - PHL

2 stops28h 56mMultiple Airlines

Mon 1/1220:00PHL - LCY

2 stops16h 40mMultiple Airlines

Deal found 12/10£534

Wed 19/1109:50LCY - PHL

2 stops28h 56mMultiple Airlines

Sun 23/1110:34PHL - LCY

2 stops17h 41mMultiple Airlines

Deal found 14/10£550

Thu 4/1209:40LCY - PHL

2 stops28h 55mMultiple Airlines

Mon 8/1215:05PHL - LCY

2 stops16h 45mMultiple Airlines

Deal found 13/10£552

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 15 October 2025.

Wed 3/1210:15LHR - PHL

Nonstop8h 00mBritish Airways

Tue 9/1218:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 14/10£524

Mon 10/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Mon 17/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 13/10£525

Tue 18/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Thu 27/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 14/10£526

Wed 18/210:05LHR - PHL

Nonstop8h 05mBritish Airways

Tue 24/218:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 13/10£531

Wed 11/313:10LHR - PHL

Nonstop8h 05mBritish Airways

Mon 23/320:45PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 14/10£532

Wed 26/1110:15LHR - PHL

Nonstop8h 10mIberia

Wed 3/1219:50PHL - LHR

Nonstop7h 00mIberia

Deal found 12/10£537

Mon 24/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Mon 12/119:45PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 14/10£538

Mon 17/1110:15LHR - PHL

Nonstop8h 10mBritish Airways

Mon 24/1118:35PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 14/10£539

Last-minute flights from London to Philadelphia
Discover last-minute flight deals from London to Philadelphia. Data last updated 15 October 2025 and is based on user searches.

Sun 9/1113:45LHR - PHL

2 stops38h 01mAir Canada

Thu 20/1109:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 14/10£455

Mon 10/1109:20LHR - PHL

1 stop11h 37mJetBlue

Mon 17/1106:00PHL - LHR

1 stop19h 55mJetBlue

Deal found 13/10£446

Mon 10/1113:25LHR - PHL

1 stop30h 22mAir Canada

Mon 17/1109:20PHL - LHR

2 stops30h 15mAir Canada

Deal found 13/10£452

Mon 10/1114:05STN - PHL

3 stops31h 00mMultiple Airlines

Mon 17/1109:20PHL - STN

3 stops31h 45mMultiple Airlines

Deal found 13/10£461

Tue 11/1113:25LHR - PHL

2 stops38h 21mAir Canada

Tue 18/1115:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 14/10£447

Wed 12/1106:50LHR - PHL

2 stops12h 57mAir Canada

Wed 19/1109:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 13/10£453

Fri 14/1109:00LHR - PHL

2 stops34h 47mAir Canada

Sun 23/1109:20PHL - LHR

2 stops30h 15mAir Canada

Deal found 13/10£456

Mon 17/1113:25LHR - PHL

1 stop30h 22mAir Canada

Mon 24/1109:20PHL - LHR

2 stops16h 50mAir Canada

Deal found 14/10£446

Tue 18/1112:20LHR - PHL

2 stops32h 37mIcelandair

Thu 27/1106:00PHL - LHR

1 stop19h 55mIcelandair

Deal found 13/10£455

Mon 24/1109:20LHR - PHL

1 stop27h 34mJetBlue

Mon 12/113:30PHL - LHR

1 stop12h 25mJetBlue

Deal found 14/10£444

Tue 25/1108:30LHR - PHL

1 stop12h 35mMultiple Airlines

Wed 10/1216:35PHL - LHR

2 stops33h 35mMultiple Airlines

Deal found 14/10£451

Wed 26/1109:00LHR - PHL

2 stops18h 46mAir Canada

Wed 3/1216:35PHL - LHR

2 stops33h 35mAir Canada

Deal found 12/10£452

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 15 October 2025.

Tue 30/1208:40LCY - PHL

1 stop11h 55mBritish Airways

Deal found 14/10£369

Wed 10/1207:45LCY - PHL

2 stops14h 11mDelta

Deal found 12/10£370

Fri 14/1105:50LTN - PHL

1 stop15h 10mMultiple Airlines

Deal found 14/10£370

Thu 4/1220:00LTN - PHL

1 stop25h 00mMultiple Airlines

Deal found 14/10£370

Fri 14/1106:30STN - PHL

1 stop14h 30mMultiple Airlines

Deal found 14/10£371

Sat 10/120:50LHR - PHL

3 stops50h 36mMultiple Airlines

Deal found 12/10£371

Wed 10/1210:15LHR - PHL

Nonstop8h 00mBritish Airways

Deal found 13/10£372

Tue 9/1213:10LHR - PHL

Nonstop8h 05mBritish Airways

Deal found 13/10£373

Thu 11/1212:25LHR - PHL

2 stops26h 14mTAP AIR PORTUGAL

Deal found 12/10£373

Sun 23/1110:40LGW - PHL

2 stops26h 05mTAP AIR PORTUGAL

Deal found 14/10£373

Sun 12/419:35LHR - PHL

1 stop22h 25mBritish Airways

Deal found 13/10£374

Fri 21/1106:50LGW - PHL

3 stops31h 03mMultiple Airlines

Deal found 14/10£374

Cheap flight deals from London to Philadelphia

Round-trip from	£442
One-way from	£369
Popular in	August
Cheapest in	February
Average price	£551
Good round-trip deal	£505 or less
Good one-way deal	£500 or less

United Airlines
28/1-12/2
4 total stops
79h 02m total
London to Philadelphia

Search Deals

British Airways
30/12
1 total stop
11h 55m total
London to Philadelphia

Search Deals

Highest demand for flights based on searches. 5% potential increase in price (£24 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 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

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 20/1

09:20-21:24

1 stop17h 04m

Philadelphia

Wed 4/2

13:30-06:55

1 stop12h 25m

£444

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 31/12

13:30-16:05

1 stop31h 35m

Philadelphia

Thu 15/1

09:20-20:35

2 stops30h 15m

£449

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Sat 24/1

14:00-22:46

1 stop13h 46m

Philadelphia

Sun 8/2

22:00-10:00

1 stop31h 00m

£460

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 20/1

13:25-14:47

1 stop30h 22m

Philadelphia

Wed 4/2

09:20-07:10

2 stops16h 50m

£464

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 28/1

13:25-15:49

2 stops31h 24m

Philadelphia

Thu 12/2

15:30-07:10

1 stop10h 40m

£464

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 7/12

09:30-14:47

2 stops34h 17m

Philadelphia

Mon 22/12

16:35-20:35

2 stops47h 00m

£467

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 5/3

09:20-15:52

1 stop11h 32m

Philadelphia

Mon 9/3

16:48-06:55

1 stop10h 07m

£474

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 12/1

09:20-21:24

1 stop17h 04m

Philadelphia

Sun 1/2

13:30-06:55

1 stop12h 25m

£475

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 16/1

09:20-21:24

1 stop17h 04m

Philadelphia

Thu 29/1

13:30-06:55

1 stop12h 25m

£475

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 18/1

09:20-21:24

1 stop17h 04m

Philadelphia

Thu 29/1

13:30-06:55

1 stop12h 25m

£476

Flights are sorted by cheapest return flights first.

Deals found on 14/10

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 £235). Flying from London to Philadelphia in July is currently the most expensive (average of £341). 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 10% on the cost of your flight, compared to a flight in the morning.

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 Tuesday at midday when fares are most often at their lowest. Friday evenings 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 40% 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 £517.

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

Flights via Montreal (YUL) have the shortest average one-way travel time for one-stop routes: 11h 03m.

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

Flights via Washington, D.C. (IAD) offer the fastest connection on this route, with an average stopover time of 1h 41m.

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

1,332 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

1,332 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

United Airlines

7.4

Good

8,974 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Aer Lingus

7.2

Good

1,337 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Iberia

7.0

Good

2,990 reviews

Finnair

7.6

Good

1,332 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,457 reviews

Finnair

7.6

Good

1,332 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 04m. Fly via JetBlue, United Airlines, or Air Canada 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 £306. Other airlines that can offer you cheap pricing are Icelandair, from £338, and Air Canada, from £340. 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 cheapest airlines to fly from London to Philadelphia one-way?
£369 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Delta and JetBlue, with prices starting from £370 and £373, respectively.
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 Malaysia Airlines (78%), Iberia (75%) or Finnair (74%) 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 £359. While the most popular route (London Heathrow - Philadelphia) can be booked for £416 on average, our data indicates £736 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 £235). Flying from London to Philadelphia in July is currently the most expensive (average of £341). 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£306	Average£432	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Icelandair	Cheapest£338	Average£477	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£340	Average£477	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
JetBlue	Cheapest£361	Average£555	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Lufthansa	Cheapest£415	Average£519	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£442	Average£573	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£448	Average£645	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
American Airlines	Cheapest£450	Average£595	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Finnair	Cheapest£453	Average£566	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Iberia	Cheapest£473	Average£573	FlexibilityNo cancel fee	On-time77%	Search Iberia flights

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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.

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Cheap flights from London to Philadelphia from £369

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 30/12. 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

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 15 October 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 15 October 2025.

Cheap flight deals from London to Philadelphia

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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 10 October 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 15 October 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

Explore weekly flight availability from London to Philadelphia. 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 15 October 2025.

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 cheapest airlines to fly from London to Philadelphia one-way?

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 15 October 2025.

Top 10 airlines flying from London to Philadelphia

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

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

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

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

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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 15 October 2025.