How long is the flight from London to Philadelphia?

There are many flights that can get you from London to Philadelphia in 13h 35m. Fly via United Airlines 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 £422. Other airlines that can offer you cheap pricing are American Airlines, from £468, and Finnair, from £481. You may be able to fly from London to Philadelphia for 39% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from London to Philadelphia one-way?

£327 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on British Airways and Finnair, with prices starting from £400 and £479, 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 £434. While the most popular route (London Heathrow - Philadelphia) can be booked for £506 on average, our data indicates £733 when flying from London to Philadelphia.

What are the most reliable airlines from London to Philadelphia?

Consider Malaysia Airlines (86%), Finnair (71%) or Iberia (71%) 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, Aer Lingus or Finnair.

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 10 flights from London to Philadelphia per day from 7 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.

£311+ Cheap Flights from London to Philadelphia

Cheapflights Tip: The best prices from London to Philadelphia are usually found in January or February, booked 11 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from London to Philadelphia

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 November 2026.

Wed 2/1206:40 -

2 stops23h 12m

Mon 7/1215:39 -

2 stops19h 21m

Deal found 9/11£597

Mon 7/1206:00 -

2 stops21h 36m

Mon 14/1209:15 -

2 stops16h 55m

Deal found 8/11£598

Tue 1/1206:00 -

2 stops21h 36m

Tue 8/1217:05 -

2 stops33h 05m

Deal found 11/11£599

Wed 25/1109:50 -

1 stop18h 11m

Wed 27/121:07 -

1 stop27h 43m

Deal found 11/11£600

Sun 22/1106:00 -

2 stops21h 36m

Mon 7/1209:15 -

2 stops16h 55m

Deal found 7/11£602

Wed 18/1109:50 -

1 stop19h 45m

Thu 26/1105:05 -

2 stops20h 45m

Deal found 7/11£602

Fri 4/1206:45 -

1 stop14h 25m

Tue 8/1217:40 -

1 stop9h 35m

Deal found 9/11£604

Mon 7/1213:30 -

1 stop31h 35m

Mon 14/1206:00 -

2 stops20h 10m

Deal found 7/11£604

Wed 25/1120:40 -

2 stops24h 41m

Wed 2/1209:15 -

2 stops29h 45m

Deal found 7/11£605

Wed 2/1206:40 -

3 stops34h 04m

Sun 6/1208:40 -

3 stops29h 10m

Deal found 8/11£606

Wed 2/1220:25 -

2 stops31h 44m

Wed 9/1212:01 -

3 stops23h 04m

Deal found 8/11£606

Tue 24/1106:50 -

2 stops12h 49m

Wed 25/1109:15 -

2 stops16h 55m

Deal found 7/11£608

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 November 2026.

Tue 24/1107:30 -

1 stop13h 35m

Wed 25/1110:30 -

2 stops15h 40m

Deal found 7/11£619

Fri 11/1210:40 -

2 stops37h 03m

Sun 13/1209:30 -

2 stops30h 05m

Deal found 11/11£653

Mon 7/1208:20 -

1 stop12h 50m

Mon 14/1209:30 -

2 stops23h 35m

Deal found 9/11£681

Thu 21/107:15 -

1 stop12h 55m

Mon 25/118:35 -

Nonstop7h 00m

Deal found 10/11£736

Wed 30/1210:00 -

2 stops15h 30m

Sun 10/111:00 -

2 stops17h 00m

Deal found 9/11£885

Tue 1/1209:30 -

1 stop11h 35m

Thu 3/1209:15 -

2 stops30h 45m

Deal found 7/11£633

Fri 26/216:40 -

2 stops32h 43m

Mon 1/309:25 -

2 stops25h 20m

Deal found 9/11£657

Tue 1/1207:15 -

2 stops16h 28m

Tue 8/1217:40 -

1 stop9h 35m

Deal found 10/11£690

Tue 8/1215:10 -

2 stops23h 32m

Tue 29/1209:50 -

2 stops15h 50m

Deal found 11/11£646

Thu 24/1206:20 -

1 stop13h 55m

Thu 31/1216:45 -

1 stop9h 15m

Deal found 9/11£751

Thu 24/1218:30 -

2 stops30h 38m

Tue 5/109:30 -

3 stops27h 00m

Deal found 8/11£689

Mon 16/1106:35 -

1 stop14h 35m

Mon 30/1117:40 -

1 stop11h 40m

Deal found 9/11£713

Fri 2/414:05 -

2 stops24h 19m

Sun 4/411:39 -

2 stops14h 16m

Deal found 11/11£666

Wed 16/1216:35 -

2 stops31h 10m

Sat 16/115:50 -

3 stops23h 50m

Deal found 9/11£726

Thu 1/414:05 -

2 stops24h 19m

Sun 4/411:39 -

2 stops14h 16m

Deal found 11/11£666

Mon 25/108:15 -

2 stops29h 22m

Mon 1/222:27 -

3 stops38h 03m

Deal found 7/11£745

Wed 30/1206:10 -

1 stop15h 00m

Sun 10/109:30 -

2 stops17h 20m

Deal found 9/11£746

Wed 9/1207:30 -

2 stops16h 32m

Wed 23/1219:37 -

1 stop10h 13m

Deal found 8/11£680

Thu 24/1216:30 -

2 stops32h 38m

Thu 31/1209:29 -

2 stops32h 11m

Deal found 9/11£767

Fri 4/1206:45 -

1 stop14h 25m

Sun 20/1217:40 -

1 stop9h 10m

Deal found 10/11£761

Mon 7/1212:05 -

1 stop11h 57m

Mon 14/1210:53 -

1 stop14h 02m

Deal found 7/11£707

Sat 27/316:35 -

2 stops31h 38m

Fri 2/406:00 -

2 stops24h 20m

Deal found 8/11£793

Tue 8/1207:15 -

1 stop13h 55m

Sat 12/1217:40 -

1 stop10h 55m

Deal found 9/11£773

Tue 1/1208:55 -

1 stop12h 15m

Fri 4/1217:40 -

1 stop16h 15m

Deal found 7/11£787

Wed 16/1216:35 -

2 stops31h 10m

Mon 28/1209:29 -

3 stops30h 06m

Deal found 11/11£878

Sat 26/1206:35 -

1 stop14h 35m

Sun 3/117:40 -

1 stop11h 00m

Deal found 7/11£820

Sun 10/121:25 -

3 stops27h 13m

Sat 16/115:50 -

3 stops23h 50m

Deal found 11/11£914

Wed 23/1207:15 -

1 stop13h 55m

Wed 30/1209:29 -

2 stops17h 46m

Deal found 8/11£825

Thu 1/421:15 -

2 stops30h 16m

Sun 4/418:30 -

3 stops20h 55m

Deal found 11/11£920

Fri 20/1107:45 -

1 stop13h 25m

Sun 29/1117:40 -

1 stop11h 45m

Deal found 7/11£826

Find flight deals from London to Philadelphia

Round-trip from	£597
One-way from	£311
Popular in	August
Cheapest in	January
Average price	£691
Good round-trip deal	£619 or less
Good one-way deal	£489 or less

22/1-30/1
2 total stops
44h 55m total
London to Philadelphia

Search Deals

2/3-31/12
3 total stops
41h 51m total
London to Philadelphia

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£57 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).

Search Deals

Average for round-trip flights in November 2026

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

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

Cheapest return flight

LondonPhiladelphia

LGW London Gatwick - PHL Philadelphia

LGWPHL

London Gatwick

Thu 7/1

10:35-17:51

1 stop36h 16m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£323

LondonPhiladelphia

LGW London Gatwick - PHL Philadelphia

LGWPHL

London Gatwick

Thu 19/11

11:00-00:35

1 stop18h 35m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£349

LondonPhiladelphia

STN London Stansted - PHL Philadelphia

STNPHL

London Stansted

Thu 4/3

08:35-16:10

3 stops36h 35m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£373

LondonPhiladelphia

LGW London Gatwick - PHL Philadelphia

LGWPHL

London Gatwick

Thu 4/3

07:45-16:10

2 stops37h 25m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£415

LondonPhiladelphia

STN London Stansted - PHL Philadelphia

STNPHL

London Stansted

Fri 11/12

09:45-09:04

3 stops28h 19m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£427

LondonPhiladelphia

STN London Stansted - PHL Philadelphia

STNPHL

London Stansted

Thu 19/11

19:50-08:52

3 stops42h 02m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£441

LondonPhiladelphia

STN London Stansted - PHL Philadelphia

STNPHL

London Stansted

Thu 15/4

06:30-18:55

1 stop17h 25m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£446

Fastest return journey

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Tue 29/12

06:30-14:00

1 stop12h 30m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£454

LondonPhiladelphia

STN London Stansted - PHL Philadelphia

STNPHL

London Stansted

Tue 29/12

06:40-16:10

1 stop14h 30m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£455

LondonPhiladelphia

STN London Stansted - PHL Philadelphia

STNPHL

London Stansted

Sat 19/12

20:45-20:02

3 stops52h 17m

Philadelphia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£462

Flights are sorted by cheapest return flights first.

Deals found on 9/11

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

LON-PHL

LHR-PHL

LGW-PHL

STN-PHL

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

LON-PHL

LHR-PHL

LGW-PHL

STN-PHL

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

Currently, January is the cheapest month in which you can book a flight from London to Philadelphia (average of £608). Flying from London to Philadelphia in August is currently the most expensive (average of £868). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Philadelphia as you normally would.

Weekly flight availability from London to Philadelphia

The most flights from LON to PHL 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 London to Philadelphia?

Airfare is typical for this route at the moment.

London to Philadelphia flights typically cost between £597 and £823 in December.
The cheapest return price found within the last 5 days was £597 on Scandinavian Airlines (2 Dec–7 Dec).

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

Dublin (DUB) – chosen by Cheapflights users on 56% of one-stop itineraries from London to Philadelphia on Cheapflights.

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

Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £539.

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 11h 05m.

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

Flights via Charlotte (CLT) offer the fastest connection on this route, with an average stopover time of 1h 46m.

How often are flights from London to Philadelphia delayed?

About 16% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 154 minutes.

What is the most punctual flight time for London to Philadelphia flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Philadelphia flights?

Over the past year, American Airlines have had the lowest number of delays on this route, with just 13% of flights being delayed.

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

Reviews of airlines servicing Philadelphia

See what other customers who have flown with Finnair,Aer Lingus, andJetBlue 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

1,411 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

Finnair

7.6

Good

1,411 reviews

Finnair

7.6

Good

1,411 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

Aer Lingus

7.3

Good

1,883 reviews

Finnair

7.6

Good

1,411 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

JetBlue

7.1

Good

3,073 reviews

Finnair

7.6

Good

1,411 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

Iberia

7.0

Good

3,228 reviews

Finnair

7.6

Good

1,411 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

British Airways

6.7

Okay

8,278 reviews

Finnair

7.6

Good

1,411 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

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 10 flights from London to Philadelphia per day from 7 different airlines.
How long is the flight from London to Philadelphia?
There are many flights that can get you from London to Philadelphia in 13h 35m. Fly via United Airlines 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 £422. Other airlines that can offer you cheap pricing are American Airlines, from £468, and Finnair, from £481. You may be able to fly from London to Philadelphia for 39% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from London to Philadelphia one-way?
£327 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on British Airways and Finnair, with prices starting from £400 and £479, 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 (86%), Finnair (71%) or Iberia (71%) 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 £434. While the most popular route (London Heathrow - Philadelphia) can be booked for £506 on average, our data indicates £733 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, January is the cheapest month in which you can book a flight from London to Philadelphia (average of £608). Flying from London to Philadelphia in August is currently the most expensive (average of £868). 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

King of Prussia

Middletown

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Fly from London to Philadelphia on these airlines

British Airways flights from London to Philadelphia

Finnair flights from London to Philadelphia

Iberia flights from London to Philadelphia

Top 7 airlines flying from London to Philadelphia

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest£422	Average£565	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
American Airlines	Cheapest£468	Average£746	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Finnair	Cheapest£481	Average£744	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
United Airlines	Cheapest£495	Average£703	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
British Airways	Cheapest£496	Average£700	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Iberia	Cheapest£511	Average£725	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Aer Lingus	Cheapest£593	Average£747	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus 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 £311

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 November 2026.

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 November 2026.

Best flights from London to PhiladelphiaDiscover 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 November 2026.

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 November 2026.

Direct flights from London to PhiladelphiaExplore 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 November 2026.

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 November 2026.

Last-minute flights from London to PhiladelphiaDiscover last-minute flight deals from London to Philadelphia. Data last updated 12 November 2026 and is based on user searches.

Discover last-minute flight deals from London to Philadelphia. Data last updated 12 November 2026 and is based on user searches.

One-way flights from London to PhiladelphiaSearch for one-way flight options from London to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 12 November 2026.

Search for one-way flight options from London to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 12 November 2026.

Find 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

Cheapflights Fare Finder

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

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 November 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Philadelphia as you normally would.

Weekly flight availability from London to Philadelphia

The most flights from LON to PHL 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 London to Philadelphia?

Airfare is typical for this route at the moment.

London to Philadelphia flights typically cost between £597 and £823 in December.The cheapest return price found within the last 5 days was £597 on Scandinavian Airlines (2 Dec–7 Dec).

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.

Dublin (DUB) – chosen by Cheapflights users on 56% of one-stop itineraries from London to Philadelphia on Cheapflights.

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.

Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £539.

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.

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 11h 05m.

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.

Flights via Charlotte (CLT) offer the fastest connection on this route, with an average stopover time of 1h 46m.

How often are flights from London to Philadelphia delayed?

About 16% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 154 minutes.

What is the most punctual flight time for London to Philadelphia flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Philadelphia flights?

Over the past year, American Airlines have had the lowest number of delays on this route, with just 13% of flights being delayed.

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

Reviews of airlines servicing Philadelphia

See what other customers who have flown with Finnair,Aer Lingus, andJetBlue 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

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?

Travelling to a place near 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 November 2026.

Alternative routes for London to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Philadelphia by adding a car hire and/or hotel booking to your travel itinerary.

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 November 2026.

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 November 2026.

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 November 2026.

Last-minute flights from London to Philadelphia
Discover last-minute flight deals from London to Philadelphia. Data last updated 12 November 2026 and is based on user searches.

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 November 2026.

London to Philadelphia flights typically cost between £597 and £823 in December.
The cheapest return price found within the last 5 days was £597 on Scandinavian Airlines (2 Dec–7 Dec).