How often are flights from London to Philadelphia delayed?

Historically, on average around 18% 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 175 minutes.

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. Sunday 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 16% of their flights experiencing any sort of delay.

What airlines fly to Philadelphia?

British Airways, United Airlines and American Airlines are the top three most popular airlines that fly to Philadelphia from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 17 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

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.

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

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

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

As of January 2026, there are 4 operators available to choose from for flights from London Heathrow Airport to Philadelphia Airport.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Philadelphia Airport.

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

The required travel and health documents for your Philadelphia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$370 Cheap Flights from London Heathrow Airport to Philadelphia in 2026

Q: How many flights depart from London Heathrow Airport to Philadelphia on average per day?

8 flights are operational daily from London Heathrow Airport to Philadelphia as of January 2026. The most popular departure time for this route is 1:00PM, with 63% of flights per day taking off in the afternoon.

Q: How many flights depart from London Heathrow Airport to Philadelphia on average per week?

As of January 2026, there are 60 flights per week flying from London Heathrow Airport to Philadelphia. The most common day of the week flights depart is Wed, with 17% of flights taking off on this day.

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7:50 am - 2:05 pm

LHR

PHL

11h 15m

1 stop

1:53 pm - 6:15 am

PHL

LHR

11h 22m

1 stop

$581American Airlines

Wed, Feb 11 - Wed, Jun 3

8:30 am - 9:09 pm

LHR

PHL

16h 39m

2 stops

2:52 pm - 10:50 am

PHL

LHR

15h 58m

1 stop

$582United Airlines

Fri, Mar 13 - Fri, Mar 20

1:30 pm - 1:51 pm

LHR

PHL

28h 21m

2 stops

10:35 am - 6:40 am

PHL

LHR

16h 05m

1 stop

$583United Airlines

Fri, Mar 13 - Fri, Mar 20

6:50 am - 2:47 pm

LHR

PHL

12h 57m

2 stops

3:30 pm - 7:10 am

PHL

LHR

10h 40m

1 stop

$584Air Canada

Sat, Feb 21 - Sat, Mar 7

6:50 am - 2:50 pm

LHR

PHL

13h 00m

2 stops

3:30 pm - 8:35 pm

PHL

LHR

24h 05m

2 stops

$585Air Canada

Thu, Feb 12 - Thu, Feb 26

8:50 am - 2:55 pm

LHR

PHL

11h 05m

1 stop

2:46 pm - 8:00 am

PHL

LHR

12h 14m

1 stop

$586British Airways

Wed, Apr 29 - Tue, May 12

7:50 am - 2:05 pm

LHR

PHL

11h 15m

1 stop

10:00 pm - 6:55 pm

PHL

LHR

15h 55m

1 stop

$587British Airways

Wed, Feb 11 - Sun, May 10

6:50 am - 2:47 pm

LHR

PHL

12h 57m

2 stops

3:30 pm - 7:10 am

PHL

LHR

10h 40m

1 stop

$588Air Canada

Mon, Feb 23 - Sat, Mar 7

1:30 pm - 10:46 pm

LHR

PHL

14h 16m

2 stops

10:35 am - 7:10 am

PHL

LHR

15h 35m

2 stops

$589United Airlines

Thu, Feb 12 - Sun, Feb 22

6:50 am - 2:50 pm

LHR

PHL

13h 00m

2 stops

4:05 pm - 8:30 am

PHL

LHR

11h 25m

1 stop

$590Air Canada

Thu, Feb 12 - Thu, Feb 26

United Airlines flights from London Heathrow Airport to Philadelphia

Our best United Airlines deals on London Heathrow Airport to Philadelphia flight tickets

United Airlines

Mar 13

LHR8:30 amLondon Heathrow

16h 39m

2 stops

PHL9:09 pmPhiladelphia

Mar 20

PHL2:52 pmPhiladelphia

15h 58m

1 stop

LHR10:50 amLondon Heathrow

$582

United Airlines

Mar 13

LHR8:30 amLondon Heathrow

16h 39m

2 stops

PHL9:09 pmPhiladelphia

Mar 20

PHL7:45 pmPhiladelphia

11h 05m

1 stop

LHR10:50 amLondon Heathrow

$583

United Airlines

Feb 3

LHR6:50 amLondon Heathrow

15h 44m

2 stops

PHL5:34 pmPhiladelphia

Feb 10

PHL3:01 pmPhiladelphia

15h 04m

2 stops

LHR11:05 amLondon Heathrow

$584

Air Canada flights from London Heathrow Airport to Philadelphia

Our best Air Canada deals on London Heathrow Airport to Philadelphia flight tickets

Air Canada

Feb 21

LHR6:50 amLondon Heathrow

12h 57m

2 stops

PHL2:47 pmPhiladelphia

Mar 7

PHL3:30 pmPhiladelphia

48h 05m

2 stops

LHR8:35 pmLondon Heathrow

$584

Air Canada

Feb 12

LHR6:50 amLondon Heathrow

13h 00m

2 stops

PHL2:50 pmPhiladelphia

Feb 26

PHL3:30 pmPhiladelphia

24h 05m

2 stops

LHR8:35 pmLondon Heathrow

$585

Air Canada

Feb 23

LHR6:50 amLondon Heathrow

12h 57m

2 stops

PHL2:47 pmPhiladelphia

Mar 7

PHL3:30 pmPhiladelphia

10h 40m

1 stop

LHR7:10 amLondon Heathrow

$588

momondo Fare Finder

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

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Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 2/11

7:50 am-2:05 pm

1 stop11h 15m

Philadelphia

Wed 6/3

1:53 pm-6:15 am

1 stop11h 22m

$581

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 3/13

8:30 am-9:09 pm

2 stops16h 39m

Philadelphia

Fri 3/20

2:52 pm-10:50 am

1 stop15h 58m

$582

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 3/13

1:30 pm-1:51 pm

2 stops28h 21m

Philadelphia

Fri 3/20

10:35 am-6:40 am

1 stop16h 05m

$583

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 2/21

6:50 am-2:47 pm

2 stops12h 57m

Philadelphia

Sat 3/7

3:30 pm-7:10 am

1 stop10h 40m

$584

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 2/12

6:50 am-2:50 pm

2 stops13h 00m

Philadelphia

Thu 2/26

3:30 pm-8:35 pm

2 stops24h 05m

$585

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 4/29

8:50 am-2:55 pm

1 stop11h 05m

Philadelphia

Tue 5/12

2:46 pm-8:00 am

1 stop12h 14m

$586

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 2/11

7:50 am-2:05 pm

1 stop11h 15m

Philadelphia

Sun 5/10

10:00 pm-6:55 pm

1 stop15h 55m

$587

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 2/23

6:50 am-2:47 pm

2 stops12h 57m

Philadelphia

Sat 3/7

3:30 pm-7:10 am

1 stop10h 40m

$588

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 2/12

1:30 pm-10:46 pm

2 stops14h 16m

Philadelphia

Sun 2/22

10:35 am-7:10 am

2 stops15h 35m

$589

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 2/12

6:50 am-2:50 pm

2 stops13h 00m

Philadelphia

Thu 2/26

4:05 pm-8:30 am

1 stop11h 25m

$590

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How to get the cheapest flight ticket from London Heathrow Airport 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

Other information

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from London Heathrow Airport is in March. Flight prices, which tend to average around $640, are often lower during this time because this is during the off-season. The month of February is another great option to travel to Philadelphia, with average flight prices from London Heathrow Airport averaging around $660.

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

The cheapest day to depart from London Heathrow Airport to Philadelphia is on a Thursday. Travelers who choose to depart for Philadelphia on a Thursday will often find tickets for as low as $776. On the other hand, Sunday is the most expensive day to depart from London Heathrow Airport 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 at noon. momondo users have found flights departing from London Heathrow Airport to Philadelphia at noon for as low as $805. 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 $831.

What is the cheapest London Heathrow to Philadelphia flight route?

Fly from London Heathrow to Philadelphia for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $750 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from London Heathrow Airport for as low as $677 on momondo.

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

There are 4 cabin classes available to choose from on London Heathrow 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 Heathrow Airport to Philadelphia flights?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Philadelphia.

How have London Heathrow Airport to Philadelphia flight prices changed over time?

As of January 2026, prices for London Heathrow Airport to Philadelphia flights are approximately 9% cheaper when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Philadelphia

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

Estimated round-trip price

Cheap London Heathrow Airport to Philadelphia (LHR to PHL) flight deals and tips

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

Best Price Found	$557
Fastest flight time	7h 45m
Direct flights	Mon, Tue, Wed, Thu, Fri and Sat
Airports in Philadelphia	1 airport

The best one-way flight to Philadelphia from London Heathrow Airport in the past 72 hours is $557. The best round-trip flight deal from London Heathrow Airport to Philadelphia found on momondo in the last 72 hours is $624.

The fastest flight from London Heathrow Airport to Philadelphia takes 7h 45m

Direct flights go from London Heathrow Airport to Philadelphia on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.

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

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How far is London Heathrow to Philadelphia by plane?
The straight-line distance from London Heathrow to Philadelphia is 3526.0 mi. By plane, this route typically takes 7h 45m.
When did momondo last update prices for flights from London Heathrow Airport to Philadelphia Airport?
Prices for flights from London Heathrow Airport to Philadelphia Airport are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to Philadelphia Airport?
As of January 2026, there are 4 operators available to choose from for flights from London Heathrow Airport to Philadelphia Airport.
How old do you have to be to fly from London Heathrow Airport to Philadelphia Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Philadelphia Airport.
What documentation or ID do you need to fly to Philadelphia Airport?
The required travel and health documents for your Philadelphia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London Heathrow Airport to Philadelphia?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London Heathrow Airport to Philadelphia is Airbus A350-1000 (53.07% of total bookings). The next most popular plane models are Boeing 777 (10.36%), Boeing 787-9 Dreamliner (7.25%), and Airbus A330-900neo (6.94%).
What is the most popular airline from London Heathrow Airport to Philadelphia?
Based on momondo bookings for flights between London Heathrow Airport and Philadelphia, the leading airline is British Airways, making up 65% of the total bookings. Other popular airlines include American Airlines with 18%, Aer Lingus with 11%, and Iberia with 6%.

Best airlines flying from London Heathrow Airport to Philadelphia

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

Airline	Rating	Free Cancellation	Price
Iberia	PriceFrom $429	Free Cancellation	Rating 7.0 3,099 reviews	Search Iberia flights
British Airways	PriceFrom $597	Free Cancellation	Rating 6.7 7,705 reviews	Search British Airways flights
American Airlines	PriceFrom $610	Free Cancellation	Rating 7.2 11,206 reviews	Search American Airlines flights
Aer Lingus	PriceFrom $670	Free Cancellation	Rating 7.2 1,443 reviews	Search Aer Lingus flights

American Airlines Flights From London Heathrow Airport to Philadelphia
The lowest priced American Airlines flight from London Heathrow Airport to Philadelphia from the last 72 hours was $610. Generally, American Airlines has 12 flights on this route every week with an average price of $814. American Airlines is rated 7.2/10 by our users.
Aer Lingus Flights From London Heathrow Airport to Philadelphia
Aer Lingus (7.2/10 from 1,443 reviews) operates around 7 flights from London Heathrow Airport to Philadelphia in any given week. The average Aer Lingus airfare for this route is around $1,182, with deals from around $670 rare but found on momondo. Referenced prices are for round-trip London Heathrow Airport to Philadelphia flight searches in the last 72 hours.

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Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Philadelphia. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from London to Philadelphia on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Philadelphia.

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

Yes. momondo can track prices for London to Philadelphia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Cheap flights from London Heathrow Airport to Philadelphia from $357

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

See travel insights to Philadelphia from

How to get the cheapest flight ticket from London Heathrow Airport 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 Heathrow to Philadelphia flight route?

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

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

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

There are 4 cabin classes available to choose from on London Heathrow 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 Heathrow Airport to Philadelphia flights?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Philadelphia.

How have London Heathrow Airport to Philadelphia flight prices changed over time?

As of January 2026, prices for London Heathrow Airport to Philadelphia flights are approximately 9% cheaper when compared to flights at the same time last year.

What airlines fly to Philadelphia?

How often are flights from London to Philadelphia delayed?

Historically, on average around 18% 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 175 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. Sunday 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 16% of their flights experiencing any sort of delay.

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

8 flights are operational daily from London Heathrow Airport to Philadelphia as of January 2026. The most popular departure time for this route is 1:00PM, with 63% of flights per day taking off in the afternoon.

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

As of January 2026, there are 60 flights per week flying from London Heathrow Airport to Philadelphia. The most common day of the week flights depart is Wed, with 17% of flights taking off on this day.

When to book flights from London Heathrow Airport to Philadelphia

Cheap London Heathrow Airport to Philadelphia (LHR to PHL) flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Philadelphia

How far is London Heathrow to Philadelphia by plane?

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

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

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

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

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

What is the most popular airline from London Heathrow Airport to Philadelphia?

Best airlines flying from London Heathrow Airport to Philadelphia

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

American Airlines Flights From London Heathrow Airport to Philadelphia

Aer Lingus Flights From London Heathrow Airport 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?

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

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

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.

Get notified when prices go down

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

Find better results for your trip to the United States

Airports servicing Pennsylvania