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

Boston (BOS) – chosen by Cheapflights users on 80% of one-stop itineraries from Philadelphia to London Heathrow Airport on Cheapflights.

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

Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £433.

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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 9h 55m.

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

Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 1h 47m.

How long is the flight from Philadelphia to London Heathrow Airport?

For as low as £728, Scandinavian Airlines can have you in London Heathrow Airport from Philadelphia in 17h 20m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines flying from Philadelphia to London Heathrow Airport round-trip?

Our cheapest airline available from Philadelphia to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £381 on this airline. Additional options worth looking into are Aer Lingus and JetBlue, starting at £388 and £423 round-trip. Users have found that British Airways is 39% cheaper than the other options available to this destination.

Weekly flight availability from Philadelphia to London Heathrow Airport

The most flights from PHL to LHR are scheduled on a Monday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (15 on average).

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What are the cheapest flights from Philadelphia to London Heathrow Airport?

The cheapest flight price from Philadelphia to London Heathrow Airport is £400. On average you can expect to pay £615. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £575.

What are the most reliable airlines from Philadelphia to London Heathrow Airport?

Consider Iberia (93%), Malaysia Airlines (93%) or American Airlines (90%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London Heathrow Airport.

What are the most popular airlines that fly from Philadelphia to London Heathrow Airport?

When booking a flight from Philadelphia to London Heathrow Airport, you may want to consider flying on British Airways, American Airlines or Aer Lingus as they are the most popular for this route.

What airport do you fly from for flights from Philadelphia to London Heathrow?

Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to London Heathrow. You should not have trouble finding flights to London Heathrow from Philadelphia; the airport handles an average of 15 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.

Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?

Yes. In addition to deals on Philadelphia to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Philadelphia to Heathrow?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Heathrow.

Can I find deals for business class flights from Philadelphia to Heathrow?

Yes. Cheapflights offers flight deals from Philadelphia to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£254+ Cheap Flights from Philadelphia to London Heathrow Airport

Q: How much does it cost for a return flight from Philadelphia to London Heathrow Airport?

Airfare is below average for this route at the moment. Philadelphia to London Heathrow Airport flights typically cost between £884 and £572 in September. The cheapest return flight price found within the last 3 days was £575 on British Airways (19 Sept-22 Sept).

Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in September or October, booked 27 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from Philadelphia to Heathrow

Enter your travel dates to find the best prices.

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Best

Direct

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One-way

Cheapest flights from Philadelphia to Heathrow
Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 April 2026.

Sat 14/1106:00

PHL

LHR

3 stops25h 55m

Scandinavian Airlines

Mon 16/1107:05

LHR

PHL

3 stops18h 02m

Scandinavian Airlines

Deal found 27/4£555

Sat 19/922:20

PHL

LHR

1 stop27h 45m

British Airways

Tue 22/906:15

LHR

PHL

1 stop16h 25m

British Airways

Deal found 23/4£575

Tue 20/1009:40

PHL

LHR

2 stops18h 40m

Scandinavian Airlines

Tue 27/1006:40

LHR

PHL

2 stops19h 58m

Scandinavian Airlines

Deal found 25/4£634

Mon 28/909:40

PHL

LHR

2 stops18h 40m

Scandinavian Airlines

Wed 21/1006:40

LHR

PHL

2 stops20h 58m

Scandinavian Airlines

Deal found 24/4£635

Mon 4/506:00

PHL

LHR

1 stop19h 30m

JetBlue

Fri 8/508:40

LHR

PHL

1 stop13h 58m

JetBlue

Deal found 23/4£645

Tue 29/920:25

PHL

LHR

1 stop9h 45m

Aer Lingus

Tue 13/1013:25

LHR

PHL

1 stop10h 30m

Aer Lingus

Deal found 23/4£645

Fri 11/920:25

PHL

LHR

1 stop9h 50m

Aer Lingus

Thu 1/1012:00

LHR

PHL

1 stop11h 55m

Aer Lingus

Deal found 27/4£646

Wed 21/1009:40

PHL

LHR

2 stops18h 40m

Scandinavian Airlines

Wed 4/1106:40

LHR

PHL

2 stops22h 41m

Scandinavian Airlines

Deal found 27/4£647

Sun 3/506:00

PHL

LHR

1 stop19h 30m

JetBlue

Tue 12/508:40

LHR

PHL

1 stop13h 58m

JetBlue

Deal found 27/4£648

Wed 19/818:45

PHL

LHR

Nonstop7h 05m

Multiple Airlines

Tue 1/912:00

LHR

PHL

1 stop11h 55m

Multiple Airlines

Deal found 25/4£649

Fri 18/922:20

PHL

LHR

1 stop28h 30m

British Airways

Mon 21/907:50

LHR

PHL

1 stop14h 50m

British Airways

Deal found 24/4£650

Sun 6/914:27

PHL

LHR

2 stops26h 13m

Scandinavian Airlines

Sat 19/906:40

LHR

PHL

2 stops22h 47m

Scandinavian Airlines

Deal found 25/4£650

Find flight deals from Philadelphia to Heathrow

Round-trip from	£575
One-way from	£254
Popular in	June
Cheapest in	September
Average price	£575
Good round-trip deal	£679 or less
Good one-way deal	£435 or less

British Airways
19/9-22/9
2 total stops
44h 10m total
Philadelphia to London

Search Deals

British Airways
14/9
Nonstop
7h 05m total
Philadelphia to London

Search Deals

Highest demand for flights based on searches. 21% potential increase in price (£129 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£23 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2026

Search Deals

Price to beat on a round-trip flight from Philadelphia to London Heathrow.

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Price to beat on a one-way flight from Philadelphia to London Heathrow.

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 27/8

09:40-09:20

2 stops18h 40m

London Heathrow

Mon 31/8

19:50-19:58

3 stops29h 08m

£676

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 3/10

17:15-07:10

1 stop32h 55m

London Heathrow

Tue 20/10

11:30-23:02

2 stops16h 32m

£687

Fastest return journey

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 10/10

20:35-18:55

1 stop17h 20m

London Heathrow

Sat 17/10

09:15-12:15

Nonstop8h 00m

£728

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 8/8

20:35-07:40

1 stop30h 05m

London Heathrow

Wed 12/8

09:15-12:20

Nonstop8h 05m

£734

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 17/9

09:40-17:40

2 stops27h 00m

London Heathrow

Sun 20/9

19:50-19:58

3 stops29h 08m

£742

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 13/8

10:38-07:15

1 stop15h 37m

London Heathrow

Fri 28/8

08:40-19:58

2 stops16h 18m

£755

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 29/8

10:45-09:20

2 stops17h 35m

London Heathrow

Sun 13/9

19:50-19:58

3 stops29h 08m

£765

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 7/8

17:28-12:05

2 stops13h 37m

London Heathrow

Fri 21/8

08:40-19:58

2 stops16h 18m

£797

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 17/9

13:20-07:40

2 stops13h 20m

London Heathrow

Sun 20/9

06:15-17:14

2 stops15h 59m

£802

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 12/9

10:45-14:35

3 stops22h 50m

London Heathrow

Sat 19/9

06:40-00:27

2 stops22h 47m

£817

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 22 resultsSorted by cheapest first

Best time to book a flight from Philadelphia to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Philadelphia with our price prediction graph.

PHL-LHR

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 Philadelphia to London Heathrow Airport

Prices

Airlines

How far ahead should I book a flight from Philadelphia to London Heathrow Airport?

The best time to book flights from Philadelphia to London Heathrow Airport is 26 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £484). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £964). 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 PHL to LHR?

When flying from Philadelphia to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from Philadelphia to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Aer Lingus,JetBlue, andAmerican Airlines from Philadelphia to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Aer Lingus

7.3

Good

1,534 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jan 2026

SFO - DUB

The boarding went smoothly, the crew were great and helped me with an extra pillow, the food was good including complementary wine with dinner (economy seating), and I was able to sleep. The flight arrived early which helped with connections. Overall a great experience.

Aer Lingus

7.3

Good

1,534 reviews

Aer Lingus

7.3

Good

1,534 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jan 2026

SFO - DUB

JetBlue

7.2

Good

2,967 reviews

Aer Lingus

7.3

Good

1,534 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jan 2026

SFO - DUB

American Airlines

7.1

Good

11,671 reviews

Aer Lingus

7.3

Good

1,534 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jan 2026

SFO - DUB

British Airways

6.7

Okay

7,923 reviews

Aer Lingus

7.3

Good

1,534 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jan 2026

SFO - DUB

Related info for your journey

What airport do you fly from for flights from Philadelphia to London Heathrow?
Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to London Heathrow. You should not have trouble finding flights to London Heathrow from Philadelphia; the airport handles an average of 15 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.
How long is the flight from Philadelphia to London Heathrow Airport?
For as low as £728, Scandinavian Airlines can have you in London Heathrow Airport from Philadelphia in 17h 20m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Philadelphia to London Heathrow Airport round-trip?
Our cheapest airline available from Philadelphia to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £381 on this airline. Additional options worth looking into are Aer Lingus and JetBlue, starting at £388 and £423 round-trip. Users have found that British Airways is 39% cheaper than the other options available to this destination.
What are the most reliable airlines from Philadelphia to London Heathrow Airport?
Consider Iberia (93%), Malaysia Airlines (93%) or American Airlines (90%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London Heathrow Airport.
What are the cheapest flights from Philadelphia to London Heathrow Airport?
The cheapest flight price from Philadelphia to London Heathrow Airport is £400. On average you can expect to pay £615. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £575.
Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?
Yes. In addition to deals on Philadelphia to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Philadelphia to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Heathrow.
Can I find deals for business class flights from Philadelphia to Heathrow?
Yes. Cheapflights offers flight deals from Philadelphia to Heathrow 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 Philadelphia to London Heathrow Airport?
Currently, September is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £484). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £964). 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.

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Top 4 airlines flying from Philadelphia to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£381	Average£580	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£388	Average£514	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
JetBlue	Cheapest£423	Average£555	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
American Airlines	Cheapest£505	Average£658	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

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

Cheapflights makes it easy to find Philadelphia to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Philadelphia to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Need flexible booking options for your flight to Heathrow from Philadelphia? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes! Start tracking prices for Philadelphia to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from Philadelphia to London Heathrow Airport from £254

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Philadelphia to Heathrow

Cheapest flights from Philadelphia to HeathrowExplore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 April 2026.

Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 April 2026.

Best flights from Philadelphia to HeathrowDiscover carefully curated flight deals from Philadelphia to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 April 2026.

Discover carefully curated flight deals from Philadelphia to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 April 2026.

Direct flights from Philadelphia to HeathrowExplore direct flight options from Philadelphia to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 28 April 2026.

Explore direct flight options from Philadelphia to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 28 April 2026.

Last-minute flights from Philadelphia to HeathrowDiscover last-minute flight deals from Philadelphia to Heathrow. Data last updated 28 April 2026 and is based on user searches.

Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 28 April 2026 and is based on user searches.

One-way flights from Philadelphia to HeathrowSearch for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated 28 April 2026.

Search for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated 28 April 2026.

Find flight deals from Philadelphia to Heathrow

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One-way from

Popular in

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

Best time to book a flight from Philadelphia to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Philadelphia with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to London Heathrow Airport

How far ahead should I book a flight from Philadelphia to London Heathrow Airport?

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

What is the cheapest time of day to fly from PHL to LHR?

How much does it cost for a return flight from Philadelphia to London Heathrow Airport?

Weekly flight availability from Philadelphia to London Heathrow Airport

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

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

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

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

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Aer Lingus,JetBlue, andAmerican Airlines from Philadelphia to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Philadelphia to London Heathrow?

How long is the flight from Philadelphia to London Heathrow Airport?

What are the cheapest airlines flying from Philadelphia to London Heathrow Airport round-trip?

What are the most reliable airlines from Philadelphia to London Heathrow Airport?

What are the cheapest flights from Philadelphia to London Heathrow Airport?

Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?

How can I find direct flights from Philadelphia to Heathrow?

Can I find deals for business class flights from Philadelphia to Heathrow?

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

Travelling to a place near London Heathrow Airport?

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Alternative routes for Philadelphia to Heathrow

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Complete your trip

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Search flights from Philadelphia to Heathrow by cabin class

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Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 28 April 2026.

Philadelphia and Heathrow flights

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Top 4 airlines flying from Philadelphia to Heathrow

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

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

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Cheapest flights from Philadelphia to Heathrow
Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 April 2026.

Best flights from Philadelphia to Heathrow
Discover carefully curated flight deals from Philadelphia to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 April 2026.

Direct flights from Philadelphia to Heathrow
Explore direct flight options from Philadelphia to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 28 April 2026.

Last-minute flights from Philadelphia to Heathrow
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 28 April 2026 and is based on user searches.

One-way flights from Philadelphia to Heathrow
Search for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated 28 April 2026.