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

Boston (BOS) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 9h 35m.

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

As of January 2026, 10 flights take off from Philadelphia and land in London Heathrow Airport each day. The most common flight departure time for this route is 6:00PM, with 100% of daily flights taking off in the evening.

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

Flights via Dublin (DUB) offer the lowest average round-trip price of $678.

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

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 18m.

What airlines fly to London Heathrow Airport?

British Airways, United Airlines and Iberia are the top three most popular airlines that fly to London Heathrow Airport from Philadelphia according to our data. British Airways is the first choice among our users, with 51% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 21 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

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

As of January 2026, there are 70 flights per week flying from Philadelphia to London Heathrow Airport. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.

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

Prices for flights from Philadelphia Airport to London Heathrow Airport refresh daily.

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

The number of operators available for flights from Philadelphia Airport to London Heathrow Airport is 8 as of January 2026.

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

What documentation or ID do you need to fly to London Heathrow Airport?

The required travel and health documents for your London Heathrow 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 London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$249 Cheap Flights from Philadelphia to London Heathrow Airport in 2026

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3:30 pm - 9:20 am

PHL

LHR

12h 50m2 stops

1:25 pm - 2:47 pm

LHR

PHL

29h 22m1 stop

$602Air Canada

Wed, Mar 4 - Fri, Mar 20

8:40 pm - 7:50 am

PHL

LHR

7h 10mnonstop

4:00 pm - 11:57 am

LHR

PHL

23h 57m1 stop

$604British Airways

Mon, Mar 16 - Fri, Mar 27

4:44 pm - 5:15 pm

PHL

LHR

19h 31m2 stops

7:40 pm - 7:27 pm

LHR

PHL

28h 47m2 stops

$605Iberia

Wed, Jan 21 - Mon, Jan 26

3:30 pm - 9:20 am

PHL

LHR

12h 50m2 stops

9:00 am - 10:46 pm

LHR

PHL

17h 46m2 stops

$606Air Canada

Wed, Mar 4 - Wed, Mar 18

12:29 pm - 10:15 am

PHL

LHR

16h 46m2 stops

8:55 am - 9:16 pm

LHR

PHL

17h 21m2 stops

$607Virgin Atlantic

Wed, Feb 4 - Wed, Feb 11

9:15 am - 6:30 am

PHL

LHR

16h 15m2 stops

8:40 am - 9:33 pm

LHR

PHL

17h 53m2 stops

$608Air Canada

Sun, Apr 5 - Wed, May 6

5:57 pm - 6:25 am

PHL

LHR

31h 28m1 stop

9:40 am - 4:57 pm

LHR

PHL

12h 17m1 stop

$609Delta

Sat, Jan 24 - Thu, Feb 19

8:40 pm - 7:50 am

PHL

LHR

7h 10mnonstop

1:45 pm - 4:40 pm

LHR

PHL

7h 55mnonstop

$610British Airways

Sun, Mar 22 - Wed, Apr 1

7:50 pm - 7:50 am

PHL

LHR

7h 00mnonstop

12:00 pm - 6:55 pm

LHR

PHL

11h 55m1 stop

$611British Airways

Wed, Apr 15 - Sat, Apr 25

1:10 pm - 5:50 pm

PHL

LHR

23h 40m2 stops

1:45 pm - 9:36 pm

LHR

PHL

36h 51m2 stops

$612SWISS

Mon, Jan 26 - Mon, Feb 2

British Airways flights from Philadelphia to London Heathrow Airport

Our best British Airways deals on Philadelphia to London Heathrow Airport flight tickets

British Airways

Mar 16

PHL8:40 pmPhiladelphia

7h 10m

LHR7:50 amLondon Heathrow

Mar 27

LHR4:00 pmLondon Heathrow

23h 57m

1 stop

PHL11:57 amPhiladelphia

$604

British Airways

Mar 22

PHL7:35 pmPhiladelphia

7h 00m

LHR6:35 amLondon Heathrow

Apr 2

LHR12:30 pmLondon Heathrow

8h 00m

PHL3:30 pmPhiladelphia

$610

British Airways

Apr 15

PHL10:20 pmPhiladelphia

7h 00m

LHR10:20 amLondon Heathrow

Apr 25

LHR12:00 pmLondon Heathrow

11h 55m

1 stop

PHL6:55 pmPhiladelphia

$611

JetBlue flights from Philadelphia to London Heathrow Airport

Our best JetBlue deals on Philadelphia to London Heathrow Airport flight tickets

JetBlue

Jan 29

PHL1:30 pmPhiladelphia

12h 25m

1 stop

LHR6:55 amLondon Heathrow

Feb 3

LHR9:20 amLondon Heathrow

14h 03m

1 stop

PHL6:23 pmPhiladelphia

$641

JetBlue

Jan 17

PHL8:40 amPhiladelphia

17h 15m

1 stop

LHR6:55 amLondon Heathrow

Jan 20

LHR9:20 amLondon Heathrow

14h 03m

1 stop

PHL6:23 pmPhiladelphia

$656

JetBlue

Jan 10

PHL8:10 amPhiladelphia

17h 45m

1 stop

LHR6:55 amLondon Heathrow

Jan 17

LHR9:20 amLondon Heathrow

14h 18m

1 stop

PHL6:38 pmPhiladelphia

$657

momondo Fare Finder

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

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Fly to

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 3/4

3:30 pm-9:20 am

2 stops12h 50m

London Heathrow

Fri 3/20

1:25 pm-2:47 pm

1 stop29h 22m

$602

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 3/16

8:40 pm-7:50 am

Nonstop7h 10m

London Heathrow

Fri 3/27

4:00 pm-11:57 am

1 stop23h 57m

$604

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 1/21

4:44 pm-5:15 pm

2 stops19h 31m

London Heathrow

Mon 1/26

7:40 pm-7:27 pm

2 stops28h 47m

$605

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 3/4

3:30 pm-9:20 am

2 stops12h 50m

London Heathrow

Wed 3/18

9:00 am-10:46 pm

2 stops17h 46m

$606

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 2/4

12:29 pm-10:15 am

2 stops16h 46m

London Heathrow

Wed 2/11

8:55 am-9:16 pm

2 stops17h 21m

$607

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 4/5

9:15 am-6:30 am

2 stops16h 15m

London Heathrow

Wed 5/6

8:40 am-9:33 pm

2 stops17h 53m

$608

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 1/24

5:57 pm-6:25 am

1 stop31h 28m

London Heathrow

Thu 2/19

9:40 am-4:57 pm

1 stop12h 17m

$609

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 3/22

8:40 pm-7:50 am

Nonstop7h 10m

London Heathrow

Wed 4/1

1:45 pm-4:40 pm

Nonstop7h 55m

$610

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 4/15

7:50 pm-7:50 am

Nonstop7h 00m

London Heathrow

Sat 4/25

12:00 pm-6:55 pm

1 stop11h 55m

$611

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 1/26

1:10 pm-5:50 pm

2 stops23h 40m

London Heathrow

Mon 2/2

1:45 pm-9:36 pm

2 stops36h 51m

$612

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Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Layovers

Other information

What is the cheapest month to fly to London Heathrow Airport?

The month of September is, on average, the cheapest month to fly to London Heathrow Airport from Philadelphia, with most prices found around $657. If you’re not able to fly to London Heathrow Airport in September, then October is your next best option. Flight prices from Philadelphia to London Heathrow Airport during October average around $663.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $770. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $979.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Philadelphia to London Heathrow Airport in the afternoon for as low as $858. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $875.

What is the cheapest Philadelphia to London Heathrow flight route?

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

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $828 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Philadelphia for as low as $684 on momondo.

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

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

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

As of January 2026, prices for Philadelphia to London Heathrow Airport flights are approximately 1% cheaper when compared to flights at the same time last year.

When to book flights from Philadelphia to London Heathrow Airport

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

Estimated round-trip price

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

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

Best Price Found	$411
Fastest flight time	7h 00m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from Philadelphia in the past 72 hours is $411. The best round-trip flight deal from Philadelphia to London Heathrow Airport found on momondo in the last 72 hours is $688.

The fastest flight from Philadelphia to London Heathrow Airport takes 7h 00m

Direct flights go from Philadelphia to London Heathrow Airport every day.

Search flight deals

How far is Philadelphia to London Heathrow by plane?
Philadelphia and London Heathrow are 3526.0 mi apart from one another. Flights usually cover this in 7h 00m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Philadelphia Airport to London Heathrow Airport?
Prices for flights from Philadelphia Airport to London Heathrow Airport refresh daily.
How many operators does momondo search for flights from Philadelphia Airport to London Heathrow Airport?
The number of operators available for flights from Philadelphia Airport to London Heathrow Airport is 8 as of January 2026.
How old do you have to be to fly from Philadelphia Airport to London Heathrow 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 Philadelphia Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The required travel and health documents for your London Heathrow 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 London Heathrow 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 Philadelphia to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Philadelphia to London Heathrow Airport is Airbus A350-1000 (45.20% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (43.30%), Boeing 787-8 Dreamliner (3.80%), and Boeing 787 Dreamliner (3.17%).
What is the most popular airline from Philadelphia to London Heathrow Airport?
Based on momondo bookings for flights between Philadelphia and London Heathrow Airport, the leading airline is British Airways, making up 49% of the total bookings. Other popular airlines include American Airlines with 19%, Iberia with 17%, and Finnair with 6%.

Best airlines flying from Philadelphia to London Heathrow Airport

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

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $508	Free Cancellation	Rating 6.7 7,659 reviews	Search British Airways flights
American Airlines	PriceFrom $508	Free Cancellation	Rating 7.2 11,097 reviews	Search American Airlines flights
Finnair	PriceFrom $515	Free Cancellation	Rating 7.6 1,346 reviews	Search Finnair flights
Aer Lingus	PriceFrom $522	Free Cancellation	Rating 7.2 1,429 reviews	Search Aer Lingus flights
Air Canada	PriceFrom $556	Free Cancellation	Rating 7.1 10,603 reviews	Search Air Canada flights
United Airlines	PriceFrom $560	Free Cancellation	Rating 7.4 9,142 reviews	Search United Airlines flights
JetBlue	PriceFrom $580	Free Cancellation	Rating 7.2 2,891 reviews	Search JetBlue flights
Iberia	PriceFrom $595	Free Cancellation	Rating 7.0 3,079 reviews	Search Iberia flights

Finnair Flights From Philadelphia to London Heathrow Airport
Finnair flies from Philadelphia to London Heathrow Airport around 14 times per week, with 1,346 momondo users rating the airline 7.6/10. The cheapest Finnair deal from Philadelphia to London Heathrow Airport in the last 72 hours was $515 (round-trip), much lower than the average airfare cost of $777 for Finnair flights on this route.
American Airlines Flights From Philadelphia to London Heathrow Airport
The best American Airlines deal for Philadelphia to London Heathrow Airport flight tickets found on momondo in the last 72 hours was $508, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $834 round-trip. American Airlines operates 14 flights out of Philadelphia into London Heathrow Airport in an average week, so prices vary by time and availability. 11,097 American Airlines reviews by users on momondo have scored the airline at 7.2/10.

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Why use momondo?

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

It is quick and easy to find Philadelphia to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Flights from Philadelphia to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Philadelphia.

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

If you are not ready to book a flight from Philadelphia to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

An easier way to manage your London Heathrow Airport 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.

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Flights to London Luton Airportfrom $370

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Flights to Belfast Intl Airportfrom $482

Flights to Belfast City Airportfrom $482

Cheap flights from Philadelphia to London from $249

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to London departing on 2/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Find the cheapest flights from Philadelphia to London

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British Airways flights from Philadelphia to London Heathrow Airport

Our best British Airways deals on Philadelphia to London Heathrow Airport flight tickets

JetBlue flights from Philadelphia to London Heathrow Airport

Our best JetBlue deals on Philadelphia to London Heathrow Airport flight tickets

momondo Fare Finder

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

See travel insights to London from

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

What is the cheapest month to fly to London Heathrow Airport?

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $770. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $979.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

What is the cheapest Philadelphia to London Heathrow flight route?

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

How far in advance should I book a flight to London Heathrow Airport?

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

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

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

As of January 2026, prices for Philadelphia to London Heathrow Airport flights are approximately 1% cheaper when compared to flights at the same time last year.

What airlines fly to London Heathrow Airport?

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

Boston (BOS) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Dublin (DUB) offer the lowest average round-trip price of $678.

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 9h 35m.

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

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 18m.

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

As of January 2026, 10 flights take off from Philadelphia and land in London Heathrow Airport each day. The most common flight departure time for this route is 6:00PM, with 100% of daily flights taking off in the evening.

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

As of January 2026, there are 70 flights per week flying from Philadelphia to London Heathrow Airport. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.

When to book flights from Philadelphia to London Heathrow Airport

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

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

Best Price Found

Fastest flight time

Direct flights

How far is Philadelphia to London Heathrow by plane?

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

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

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

What documentation or ID do you need to fly to London Heathrow Airport?

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

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

Best airlines flying from Philadelphia to London Heathrow Airport

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

Finnair Flights From Philadelphia to London Heathrow Airport

American Airlines Flights From Philadelphia to London Heathrow Airport

Traveling to a place near London?

Why use momondo?

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

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

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

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

An easier way to manage your London Heathrow Airport 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 London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo