Cheap flights from London Heathrow Airport to Philadelphia from £230

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in February or March, booked 25 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Heathrow to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Philadelphia (PHL). 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 16 January 2026.

Round-trip from

£450

One-way from

£230

Popular in

August

Cheapest in

February

Average price

£579

Good round-trip deal

£523 or less

Good one-way deal

£407 or less
United Airlines
  • United Airlines
  • 26/1-2/2
  • 2 total stops
  • 40h 27m total
  • London to Philadelphia
10/3
  • 10/3
  • 3 total stops
  • 43h 29m total
  • London to Philadelphia
Highest demand for flights based on searches. 8% potential increase in price (£37 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Average for round-trip flights in January 2026
Price to beat on a round-trip flight from London Heathrow to Philadelphia.
Price to beat on a one-way flight from London Heathrow to Philadelphia.

Find flight deals from Heathrow to Philadelphia

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Philadelphia
Explore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 January 2026.

Mon 26/113:25
LHR
-
PHL
1 stop30h 22m
United Airlines
Mon 2/219:45
PHL
-
LHR
1 stop10h 05m
United Airlines
Deal found 15/1£450
Sat 14/213:35
LHR
-
PHL
1 stop29h 44m
United Airlines
Sat 28/217:00
PHL
-
LHR
1 stop13h 15m
United Airlines
Deal found 15/1£451
Sat 7/207:30
LHR
-
PHL
1 stop13h 10m
British Airways
Thu 19/219:40
PHL
-
LHR
Nonstop7h 10m
British Airways
Deal found 15/1£454
Mon 26/110:15
LHR
-
PHL
Nonstop8h 15m
British Airways
Mon 2/219:50
PHL
-
LHR
Nonstop7h 00m
British Airways
Deal found 14/1£455
Mon 26/110:00
LHR
-
PHL
2 stops18h 13m
Delta
Mon 23/212:29
PHL
-
LHR
2 stops16h 46m
Delta
Deal found 15/1£456
Mon 26/106:30
LHR
-
PHL
2 stops15h 20m
Delta
Mon 2/212:29
PHL
-
LHR
2 stops14h 36m
Delta
Deal found 13/1£456
Thu 5/207:50
LHR
-
PHL
1 stop11h 15m
British Airways
Mon 9/218:35
PHL
-
LHR
Nonstop7h 00m
British Airways
Deal found 12/1£457
Fri 13/211:10
LHR
-
PHL
1 stop33h 15m
United Airlines
Sat 14/220:02
PHL
-
LHR
2 stops30h 53m
United Airlines
Deal found 13/1£458
Mon 27/407:40
LHR
-
PHL
1 stop12h 15m
British Airways
Wed 8/715:20
PHL
-
LHR
1 stop13h 15m
British Airways
Deal found 14/1£459
Fri 1/513:25
LHR
-
PHL
1 stop10h 30m
British Airways
Tue 5/517:55
PHL
-
LHR
1 stop9h 05m
British Airways
Deal found 12/1£459
Fri 24/413:25
LHR
-
PHL
1 stop10h 30m
British Airways
Tue 28/418:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 13/1£460
Mon 26/108:55
LHR
-
PHL
2 stops17h 21m
Virgin Atlantic
Mon 2/212:29
PHL
-
LHR
2 stops15h 51m
Virgin Atlantic
Deal found 13/1£461

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Philadelphia 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 16 January 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.

Fly from

Heathrow

Fly to

Philadelphia

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 27/1

06:30-16:50

2 stops15h 20m

Philadelphia

Sun 22/2

20:06-08:45

1 stop31h 39m

£456

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 28/1

06:30-16:50

2 stops15h 20m

Philadelphia

Mon 23/2

11:09-07:50

1 stop15h 41m

£456

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 26/1

11:45-23:13

2 stops16h 28m

Philadelphia

Mon 23/2

11:09-07:50

1 stop15h 41m

£456

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 26/1

11:45-23:13

2 stops16h 28m

Philadelphia

Thu 26/2

12:16-10:50

2 stops17h 34m

£456

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 26/1

11:45-23:13

2 stops16h 28m

Philadelphia

Wed 25/2

14:31-10:50

2 stops15h 19m

£456

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 26/1

08:25-15:40

1 stop12h 15m

Philadelphia

Mon 2/2

19:50-07:50

Nonstop7h 00m

£458

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 26/1

10:15-13:30

Nonstop8h 15m

Philadelphia

Mon 2/2

19:50-07:50

Nonstop7h 00m

£461

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 28/1

10:35-13:50

Nonstop8h 15m

Philadelphia

Mon 23/2

18:35-06:35

Nonstop7h 00m

£465

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 26/1

10:15-13:30

Nonstop8h 15m

Philadelphia

Wed 25/2

18:35-06:35

Nonstop7h 00m

£465

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 27/1

10:35-13:50

Nonstop8h 15m

Philadelphia

Mon 23/2

18:35-06:35

Nonstop7h 00m

£465

Flights are sorted by cheapest return flights first.

Deals found on 13/1

Showing 1-10 of 22 results
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Best time to book a flight from Heathrow to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Heathrow 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 London Heathrow Airport to Philadelphia

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Philadelphia. Price data was last updated on 9 January 2026.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Philadelphia, you should look to book at least 25 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £309). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £341). 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 LHR to PHL?

Find hourly flight availability from Heathrow to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 January 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Philadelphia as you normally would.

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

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated 16 January 2026.
Get a feel of what it's like to fly with Finnair, United Airlines, andAer Lingus from London Heathrow Airport to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.4

Overall

7.6

Crew

8.2

Boarding

7.7

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Comfort

7.4

Overall

7.6

Crew

8.2

Boarding

7.7

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Comfort

7.4

Overall

7.6

Crew

8.2

Boarding

7.7

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Comfort

7.4

Overall

7.6

Crew

8.2

Boarding

7.7

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Comfort

7.4

Overall

7.6

Crew

8.2

Boarding

7.7

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Comfort

7.4

Overall

7.6

Crew

8.2

Boarding

7.7

Entertainment

6.9

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Philadelphia. 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 into for flights to Philadelphia from London Heathrow?

    Most people fly into Philadelphia (PHL) if they book a flight to Philadelphia from London Heathrow. On average, Philadelphia has 10 inbound flights from London Heathrow per day from 9 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.

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

    Airlines like Delta fly from London Heathrow Airport to Philadelphia in about 15h 20m. The time it takes to get you to your destination can typically vary by up to . The distance between London Heathrow Airport and Philadelphia is about 3533 mi.

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

    Our cheapest airline available from London Heathrow Airport to Philadelphia is United Airlines. Our recent data shows that you can find tickets from as low as £302 on this airline. Additional options worth looking into are Air Canada and Lufthansa, starting at £338 and £402 round-trip. United Airlines is currently priced 46% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from London Heathrow Airport to Philadelphia one-way?

    The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as £358. However, be on the lookout for offers from Aer Lingus and Iberia, as they are both options that can get you from London Heathrow Airport to Philadelphia for a low price.

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

    Consider Aer Lingus (80%), American Airlines (79%) or Finnair (79%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Philadelphia.

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

    The cheapest flight price from London Heathrow Airport to Philadelphia is £385. On average you can expect to pay £877. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £345.

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

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

  • How can I find direct flights from Heathrow to Philadelphia?

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Philadelphia 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 London Heathrow Airport to Philadelphia?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £309). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £341). 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

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Fly from Heathrow to Philadelphia on these airlines

Choose from the following airlines for your flight from Heathrow to Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on 16 January 2026.

Top 9 airlines flying from Heathrow to Philadelphia

Discover the top 9 airlines that operate flights from Heathrow to Philadelphia. 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 16 January 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£302Average£418FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest£338Average£470FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapest£402Average£501FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
JetBlueCheapest£419Average£601FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
British AirwaysCheapest£437Average£551FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£443Average£556FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£452Average£596FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
IberiaCheapest£454Average£553FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£464Average£675FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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

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

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

Need flexible booking options for your flight to Philadelphia from Heathrow? 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 Heathrow to Philadelphia become cheaper?

Yes! Start tracking prices for Heathrow to Philadelphia 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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