Cheap flights from Philadelphia to London Heathrow Airport from £211

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
10 Jul — 17 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in September or February, booked 10 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Philadelphia to Heathrow

Enter your travel dates to find the best prices.

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 10 June 2026.

Tue 8/917:30
PHL
-
LHR
1 stop9h 30m
Multiple Airlines
Tue 15/908:40
LHR
-
PHL
1 stop14h 24m
Multiple Airlines
Deal found 9/6£646
Mon 2/1119:50
PHL
-
LHR
Nonstop7h 00m
Multiple Airlines
Sun 8/1109:20
LHR
-
PHL
1 stop13h 12m
Multiple Airlines
Deal found 8/6£647
Sat 7/1115:30
PHL
-
LHR
1 stop10h 25m
Multiple Airlines
Wed 11/1106:00
LHR
-
PHL
2 stops37h 44m
Multiple Airlines
Deal found 10/6£649
Fri 3/720:55
PHL
-
LHR
1 stop28h 35m
JetBlue
Tue 7/708:40
LHR
-
PHL
1 stop16h 25m
JetBlue
Deal found 7/6£650
Fri 4/922:15
PHL
-
LHR
Nonstop7h 05m
Multiple Airlines
Mon 7/908:40
LHR
-
PHL
1 stop27h 58m
Multiple Airlines
Deal found 5/6£650
Tue 8/920:25
PHL
-
LHR
1 stop9h 45m
Multiple Airlines
Tue 22/908:45
LHR
-
PHL
2 stops15h 10m
Multiple Airlines
Deal found 7/6£653
Sat 22/820:55
PHL
-
LHR
1 stop28h 35m
JetBlue
Sun 30/808:40
LHR
-
PHL
1 stop27h 58m
JetBlue
Deal found 8/6£653
Tue 3/1113:20
PHL
-
LHR
2 stops27h 20m
Scandinavian Airlines
Sun 8/1106:40
LHR
-
PHL
2 stops23h 11m
Scandinavian Airlines
Deal found 8/6£654
Thu 13/820:25
PHL
-
LHR
1 stop13h 35m
Aer Lingus
Mon 17/813:25
LHR
-
PHL
1 stop10h 30m
Aer Lingus
Deal found 6/6£655
Sat 10/1017:50
PHL
-
LHR
1 stop9h 00m
British Airways
Mon 12/1007:50
LHR
-
PHL
1 stop15h 00m
British Airways
Deal found 9/6£656
Tue 6/1013:20
PHL
-
LHR
2 stops15h 00m
Scandinavian Airlines
Tue 20/1006:40
LHR
-
PHL
2 stops18h 27m
Scandinavian Airlines
Deal found 8/6£656

Find flight deals from Philadelphia to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 10 June 2026.

Round-trip from

£646

One-way from

£211

Popular in

June

Cheapest in

September

Average price

£1,082

Good round-trip deal

£775 or less
JetBlue
  • JetBlue
  • 8/9-23/9
  • 2 total stops
  • 23h 54m total
  • Philadelphia to London
British Airways
  • British Airways
  • 6/10
  • 1 total stop
  • 15h 22m total
  • Philadelphia to London
Highest demand for flights based on searches. 26% potential increase in price (£183 potential increase over avg. return price).
Cheapest flight prices on average. 6% potential price decrease (£29 potential savings vs. average return price).
Average for round-trip flights in June 2026
Price to beat on a round-trip flight from Philadelphia to London Heathrow.

Cheapflights Fare Finder

 
Customise your flight search to find flights from Philadelphia to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 June 2026.
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 10/9

13:20-14:35

3 stops20h 15m

London Heathrow

Mon 14/9

07:05-22:16

3 stops20h 11m

£664

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 20/10

13:00-07:10

1 stop13h 10m

London Heathrow

Tue 27/10

06:30-19:24

2 stops16h 54m

£684

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 21/10

09:42-06:25

2 stops15h 43m

London Heathrow

Wed 28/10

06:30-19:24

2 stops16h 54m

£688

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 24/8

13:15-16:00

2 stops21h 45m

London Heathrow

Fri 28/8

06:40-22:16

2 stops20h 36m

£691

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 8/10

12:09-06:25

1 stop13h 16m

London Heathrow

Wed 14/10

09:55-22:38

2 stops17h 43m

£723

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 20/9

15:25-06:30

1 stop10h 05m

London Heathrow

Mon 28/9

08:40-18:04

1 stop14h 24m

£727
Fastest return journey

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 21/10

18:45-06:50

Nonstop7h 05m

London Heathrow

Mon 26/10

13:10-17:15

Nonstop8h 05m

£733

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 12/8

11:03-07:55

2 stops15h 52m

London Heathrow

Wed 19/8

18:40-16:05

2 stops26h 25m

£759

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 4/9

12:10-13:15

1 stop20h 05m

London Heathrow

Sat 3/10

06:30-19:09

2 stops17h 39m

£760

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 10/10

09:40-12:55

3 stops22h 15m

London Heathrow

Mon 12/10

06:40-20:07

2 stops18h 27m

£810

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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.
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

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 9 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 £509). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,082). 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?

Find hourly flight availability from Philadelphia to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 10 June 2026.

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 insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 10 June 2026.
Get a feel of what it's like to fly with Aer Lingus,American Airlines, andBritish Airways 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.

Comfort

7.2

Overall

7.3

Entertainment

7.0

Crew

8.1

Food

6.7

Boarding

7.4

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.

Comfort

7.2

Overall

7.3

Entertainment

7.0

Crew

8.1

Food

6.7

Boarding

7.4

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.

Comfort

7.2

Overall

7.3

Entertainment

7.0

Crew

8.1

Food

6.7

Boarding

7.4

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.

Comfort

7.2

Overall

7.3

Entertainment

7.0

Crew

8.1

Food

6.7

Boarding

7.4

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.

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?

    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 3 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 £684, Scandinavian Airlines can have you in London Heathrow Airport from Philadelphia in 13h 10m. 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 £385 on this airline. Additional options worth looking into are Aer Lingus and American Airlines, starting at £393 and £511 round-trip. Users have found that British Airways is 42% cheaper than the other options available to this destination.

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

    Consider Malaysia Airlines (95%), American Airlines (91%) or Finnair (91%) 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 £248. On average you can expect to pay £994. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £612.

  • 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 £509). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,082). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Milton Keynes
Wembley
Luton
Gatwick
Slough
Ilford
Croydon
Hayes
Brentford
Colchester
Northampton
Kingston upon Thames
Eastbourne
Watford
Swindon
Ipswich
Poole
Guildford
Romford

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Philadelphia to Heathrow

Discover the top 3 airlines that operate flights from Philadelphia to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£385Average£635FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£393Average£521FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£511Average£667FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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