How often are flights from London to Philadelphia delayed?

Historically, on average around 17% of flights between London and Philadelphia have experienced a delay on any given week. The average delay length over the past 12 months has been 174 minutes.

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

According to our data, British Airways have had the least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

What is the cheapest airline that flies from London to Philadelphia?

JetBlue, British Airways, and Virgin Atlantic are the most popular carriers operating from London to Philadelphia

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

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

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

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Which airport is the most popular layover for flights between London and Philadelphia?

Dublin (DUB) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

How many flights depart from London to Philadelphia on average per day?

The number of flights available between London and Philadelphia is 8 per day as of December 2025. The most frequent departure time is 10:00AM, with 50% of daily flights leaving at noon.

How many flights depart from London to Philadelphia on average per week?

The number of flights available between London and Philadelphia is 58 per week as of December 2025. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.

Which layover airport has the shortest travel time from London to Philadelphia?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 12h 10m.

Which layover airport has the shortest connection time from London to Philadelphia?

Dublin (DUB) has the shortest average layover time for this route: 2h 10m.

What airlines fly to Philadelphia?

British Airways, American Airlines and United Airlines are the top three most popular airlines that fly to Philadelphia from London according to our data. British Airways is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 18 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Which layover airport offers the lowest fares from London to Philadelphia?

Flights via Boston (BOS) offer the lowest average round-trip price of $589.

When did momondo last update prices for flights from London to Philadelphia Airport?

Prices for flights from London to Philadelphia Airport are updated daily.

How many operators does momondo search for flights from London to Philadelphia Airport?

There are 5 operators available for flights from London to Philadelphia Airport as of December 2025.

How old do you have to be to fly from London to Philadelphia Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Philadelphia Airport.

What documentation or ID do you need to fly to Philadelphia Airport?

The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$306 Cheap Flights from London to Philadelphia in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from London to Philadelphia

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:25 pm - 10:46 pm

LHR

PHL

38h 21m2 stops

4:35 pm - 1:00 pm

PHL

LHR

15h 25m2 stops

$709Air Canada

Mon, Jan 12 - Mon, Jan 19

7:15 pm - 2:05 pm

LCY

PHL

23h 50m2 stops

7:55 pm - 2:05 pm

PHL

LCY

13h 10m1 stop

$710Iberia

Tue, Jan 13 - Tue, Jan 27

5:10 pm - 9:36 pm

LHR

PHL

33h 26m2 stops

1:10 pm - 11:15 am

PHL

LHR

17h 05m2 stops

$710SWISS

Mon, Jan 19 - Mon, Jan 26

8:15 am - 3:35 pm

LHR

PHL

12h 20m1 stop

9:25 pm - 2:50 pm

PHL

LHR

12h 25m1 stop

$711American Airlines

Mon, Dec 29 - Mon, Jan 12

8:40 am - 3:35 pm

LCY

PHL

11h 55m1 stop

9:25 pm - 12:40 pm

PHL

LCY

10h 15m1 stop

$711Multiple Airlines

Thu, Feb 5 - Mon, Feb 9

6:05 pm - 12:05 pm

LHR

PHL

23h 00m1 stop

9:05 pm - 10:05 am

PHL

LHR

32h 00m1 stop

$712American Airlines

Fri, Jun 12 - Sun, Jun 28

7:15 pm - 2:05 pm

LCY

PHL

23h 50m2 stops

7:55 pm - 2:35 pm

PHL

LCY

13h 40m1 stop

$712Iberia

Mon, Jan 12 - Mon, Jan 19

9:20 am - 7:25 pm

LHR

PHL

14h 05m1 stop

6:25 pm - 5:45 pm

PHL

LHR

18h 20m2 stops

$717Multiple Airlines

Tue, Mar 17 - Tue, Apr 7

5:05 pm - 3:35 pm

LCY

PHL

27h 30m1 stop

9:25 pm - 12:40 pm

PHL

LCY

10h 15m1 stop

$726British Airways

Wed, Jan 7 - Thu, Jan 15

6:40 pm - 9:36 pm

LGW

PHL

31h 56m2 stops

1:10 pm - 5:50 pm

PHL

LGW

23h 40m2 stops

$749SWISS

Tue, Jan 13 - Tue, Jan 20

Finnair flights from London to Philadelphia

Our best Finnair deals on London to Philadelphia flight tickets

Finnair

Feb 18

LGW11:20 amLondon Gatwick

27h 14m

1 stop

PHL9:34 amPhiladelphia

Mar 25

PHL1:58 pmPhiladelphia

13h 32m

1 stop

LGW7:30 amLondon Gatwick

$712

Find similar

Finnair

Jan 19

LHR10:15 amLondon Heathrow

8h 15m

PHL1:30 pmPhiladelphia

Jan 26

PHL7:50 pmPhiladelphia

7h 00m

LHR7:50 amLondon Heathrow

$735

Find similar

Finnair

Jan 19

LHR10:15 amLondon Heathrow

8h 15m

PHL1:30 pmPhiladelphia

Jan 26

PHL7:50 pmPhiladelphia

7h 00m

LHR7:50 amLondon Heathrow

$765

Find similar

SWISS flights from London to Philadelphia

Our best SWISS deals on London to Philadelphia flight tickets

SWISS

Jan 19

LHR5:10 pmLondon Heathrow

33h 26m

2 stops

PHL9:36 pmPhiladelphia

Jan 26

PHL1:10 pmPhiladelphia

17h 05m

2 stops

LHR11:15 amLondon Heathrow

$710

Find similar

SWISS

Feb 23

LGW6:40 pmLondon Gatwick

31h 48m

2 stops

PHL9:28 pmPhiladelphia

Mar 2

PHL12:55 pmPhiladelphia

23h 55m

2 stops

LGW5:50 pmLondon Gatwick

$714

Find similar

SWISS

Jan 29

LGW6:40 pmLondon Gatwick

31h 56m

2 stops

PHL9:36 pmPhiladelphia

Feb 5

PHL1:10 pmPhiladelphia

23h 40m

2 stops

LGW5:50 pmLondon Gatwick

$745

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/12

1:25 pm-10:46 pm

2 stops38h 21m

Philadelphia

Mon 1/19

4:35 pm-1:00 pm

2 stops15h 25m

$709

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 1/13

7:15 pm-2:05 pm

2 stops23h 50m

Philadelphia

Tue 1/27

7:55 pm-2:05 pm

1 stop13h 10m

$710

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/19

5:10 pm-9:36 pm

2 stops33h 26m

Philadelphia

Mon 1/26

1:10 pm-11:15 am

2 stops17h 05m

$710

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 12/29

8:15 am-3:35 pm

1 stop12h 20m

Philadelphia

Mon 1/12

9:25 pm-2:50 pm

1 stop12h 25m

$711

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Thu 2/5

8:40 am-3:35 pm

1 stop11h 55m

Philadelphia

Mon 2/9

9:25 pm-12:40 pm

1 stop10h 15m

$711

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 6/12

6:05 pm-12:05 pm

1 stop23h 00m

Philadelphia

Sun 6/28

9:05 pm-10:05 am

1 stop32h 00m

$712

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 1/12

7:15 pm-2:05 pm

2 stops23h 50m

Philadelphia

Mon 1/19

7:55 pm-2:35 pm

1 stop13h 40m

$712

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 3/17

9:20 am-7:25 pm

1 stop14h 05m

Philadelphia

Tue 4/7

6:25 pm-5:45 pm

2 stops18h 20m

$717

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Wed 1/7

5:05 pm-3:35 pm

1 stop27h 30m

Philadelphia

Thu 1/15

9:25 pm-12:40 pm

1 stop10h 15m

$726

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Tue 1/13

6:40 pm-9:36 pm

2 stops31h 56m

Philadelphia

Tue 1/20

1:10 pm-5:50 pm

2 stops23h 40m

$749

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London to Philadelphia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Delays

Layovers

Other information

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from London is in February. Flight prices, which tend to average around $653, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Philadelphia, with average flight prices from London averaging around $667.

What is the cheapest day to depart on your flight to Philadelphia?

The cheapest day to depart from London to Philadelphia is on a Thursday. Travelers who choose to depart for Philadelphia on a Thursday will often find tickets for as low as $770. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $903.

What is the cheapest time of day to depart on your flight to Philadelphia?

According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from London to Philadelphia in the evening for as low as $704. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the morning when prices are around $823.

What is the cheapest London to Philadelphia flight route?

Fly from London Heathrow to Philadelphia for the best London - Philadelphia flight prices

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

You are more likely to see cheaper flights to Philadelphia from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $757 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from London for as low as $686 on momondo.

What cabin class options are available on London to Philadelphia flights?

There are 4 cabin classes available to choose from on London to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London to Philadelphia flights?

You could potentially save up to 3% on your flight if you consider stops on a London to Philadelphia flight.

How have London to Philadelphia flight prices changed over time?

As of December 2025, prices for London to Philadelphia flights are approximately 5% cheaper when compared to flights at the same time last year.

When to book flights from London to Philadelphia

Are you open to changing your travel dates? Check out the ideal times to fly from London to Philadelphia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap London to Philadelphia (LON to PHL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Philadelphia

Best Price Found	$679
Fastest flight time	7h 55m
Direct flights	Every day
Airports in Philadelphia	1 airport

The best one-way flight to Philadelphia from London in the past 72 hours is $679. The best round-trip flight deal from London to Philadelphia found on momondo in the last 72 hours is $744.

The fastest flight from London to Philadelphia takes 7h 55m

Direct flights go from London to Philadelphia every day.

There is 1 airport in Philadelphia. From London there are direct flights to Philadelphia (PHL).

Search flight deals

How far is London to Philadelphia by plane?
There are 3538.9 mi between London and Philadelphia. 7h 55m is a normal flight duration for this route.
When did momondo last update prices for flights from London to Philadelphia Airport?
Prices for flights from London to Philadelphia Airport are updated daily.
How many operators does momondo search for flights from London to Philadelphia Airport?
There are 5 operators available for flights from London to Philadelphia Airport as of December 2025.
How old do you have to be to fly from London to Philadelphia Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Philadelphia Airport.
What documentation or ID do you need to fly to Philadelphia Airport?
The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London to Philadelphia?
Based on momondo bookings for flights between London and Philadelphia, the leading plane model is Airbus A350-1000, making up 56.70% of the total bookings. Other popular models include Boeing 777 with 8.31%, Boeing 787-9 Dreamliner with 5.54%, and Airbus A330-900neo with 5.37%.
What is the most popular airline from London to Philadelphia?
Based on momondo bookings for flights between London and Philadelphia, the leading airline is British Airways, making up 46% of the total bookings. Other popular airlines include American Airlines with 22%, Iberia with 11%, and Aer Lingus with 7%.

Best airlines flying from London to Philadelphia

Compare and see reviews for airlines that fly from London to Philadelphia with momondo

Airline	Rating	Free Cancellation	Price
Iberia	PriceFrom $559	Free Cancellation	Rating 7.0 3,053 reviews	Search Iberia flights
American Airlines	PriceFrom $592	Free Cancellation	Rating 7.2 11,055 reviews	Search American Airlines flights
British Airways	PriceFrom $618	Free Cancellation	Rating 6.7 7,585 reviews	Search British Airways flights
Finnair	PriceFrom $642	Free Cancellation	Rating 7.6 1,338 reviews	Search Finnair flights
Aer Lingus	PriceFrom $670	Free Cancellation	Rating 7.2 1,397 reviews	Search Aer Lingus flights

Finnair Flights From London to Philadelphia
Finnair flight deals from London to Philadelphia start from $642 round-trip. Over the 11 Finnair flights for this route in a normal week, average airfare is usually $767 round-trip - but some users have found much cheaper deals with momondo.
American Airlines Flights From London to Philadelphia
Across 11,055 American Airlines reviews on momondo, the average score is 7.2/10. American Airlines flies from London to Philadelphia about 11 times each week, with ticket deals ranging from $592 to $814. Price data is based on momondo searches in the last 72 hours.

Wildwood

Cape May

Rehoboth Beach

Ocean City

Wildwood Crest

King of Prussia

Cherry Hill

Newark

Dewey Beach

Reading

North Wildwood

Avalon

Dover

Lewes

Stone Harbor

Essington

Vineland

Pottstown

Elkton

Somers Point

Why use momondo?

Why should I use momondo to find a flight deal from London to Philadelphia?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Philadelphia from London.

Can I find flights from London to Philadelphia with flexible booking policies on momondo?

momondo does allow users to show only those flights to Philadelphia from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to Philadelphia?

Once you have performed a search for London to Philadelphia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to Philadelphia right now. Can momondo alert me if prices change?

Price alerts on flights to Philadelphia from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Philadelphia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Sat 1/17

Sat 1/24

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Airports servicing Pennsylvania

Allentown-Bethlehem Airport

Altoona Blair County Airport

Wilkes-Barre Scranton Airport

Bradford Airport

DuBois Jefferson County Airport

Erie Airport

Franklin Chess Lamberton Airport

Williamsport Lycoming County Airport

Johnstown Cambria County Airport

Latrobe Westmoreland County Airport

Lancaster Airport

Harrisburg Airport

Pittsburgh Airport

State College University Park Airport

Popular cities in the United States

Flights to New Yorkfrom $45

Flights to Los Angelesfrom $48

Flights to Miamifrom $49

Flights to Chicagofrom $58

Flights to Orlandofrom $40

Flights to San Franciscofrom $58

Flights to Las Vegasfrom $49

Flights to Washington, D.C.from $57

Flights to Bostonfrom $51

Flights to Atlantafrom $46

Flights to Dallasfrom $57

Flights to Seattlefrom $58

Cheap flights from London to Philadelphia from $363

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Philadelphia departing on 2/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London to Philadelphia

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Finnair flights from London to Philadelphia

Our best Finnair deals on London to Philadelphia flight tickets

SWISS flights from London to Philadelphia

Our best SWISS deals on London to Philadelphia flight tickets

momondo Fare Finder

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

See travel insights to Philadelphia from

How to get the cheapest flight ticket from London to Philadelphia

What is the cheapest month to fly to Philadelphia?

What is the cheapest day to depart on your flight to Philadelphia?

What is the cheapest time of day to depart on your flight to Philadelphia?

What is the cheapest London to Philadelphia flight route?

Fly from London Heathrow to Philadelphia for the best London - Philadelphia flight prices

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

What cabin class options are available on London to Philadelphia flights?

There are 4 cabin classes available to choose from on London to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London to Philadelphia flights?

You could potentially save up to 3% on your flight if you consider stops on a London to Philadelphia flight.

How have London to Philadelphia flight prices changed over time?

As of December 2025, prices for London to Philadelphia flights are approximately 5% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from London to Philadelphia?

JetBlue, British Airways, and Virgin Atlantic are the most popular carriers operating from London to Philadelphia

What airlines fly to Philadelphia?

How often are flights from London to Philadelphia delayed?

Historically, on average around 17% of flights between London and Philadelphia have experienced a delay on any given week. The average delay length over the past 12 months has been 174 minutes.

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

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

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

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

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

According to our data, British Airways have had the least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

Which airport is the most popular layover for flights between London and Philadelphia?

Dublin (DUB) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from London to Philadelphia?

Flights via Boston (BOS) offer the lowest average round-trip price of $589.

Which layover airport has the shortest travel time from London to Philadelphia?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 12h 10m.

Which layover airport has the shortest connection time from London to Philadelphia?

Dublin (DUB) has the shortest average layover time for this route: 2h 10m.

How many flights depart from London to Philadelphia on average per day?

The number of flights available between London and Philadelphia is 8 per day as of December 2025. The most frequent departure time is 10:00AM, with 50% of daily flights leaving at noon.

How many flights depart from London to Philadelphia on average per week?

The number of flights available between London and Philadelphia is 58 per week as of December 2025. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.

When to book flights from London to Philadelphia

Cheap London to Philadelphia (LON to PHL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Philadelphia

Best Price Found

Fastest flight time

Direct flights

Airports in Philadelphia

How far is London to Philadelphia by plane?

When did momondo last update prices for flights from London to Philadelphia Airport?

How many operators does momondo search for flights from London to Philadelphia Airport?

How old do you have to be to fly from London to Philadelphia Airport?

What documentation or ID do you need to fly to Philadelphia Airport?

What is the most popular plane model from London to Philadelphia?

What is the most popular airline from London to Philadelphia?

Best airlines flying from London to Philadelphia

Compare and see reviews for airlines that fly from London to Philadelphia with momondo

Finnair Flights From London to Philadelphia

American Airlines Flights From London to Philadelphia

Traveling to a place near Philadelphia?

Why use momondo?

Why should I use momondo to find a flight deal from London to Philadelphia?

Can I find flights from London to Philadelphia with flexible booking policies on momondo?