Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Philadelphia from £343

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
9 Jul — 16 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in September or February, booked 74 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap 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 9 June 2026.

Thu 18/614:05
LHR
-
PHL
1 stop12h 29m
Lufthansa
Wed 24/610:05
PHL
-
LHR
2 stops17h 30m
Lufthansa
Deal found 8/6£632
Thu 18/609:15
LHR
-
PHL
Nonstop7h 55m
British Airways
Tue 30/615:28
PHL
-
LHR
1 stop11h 32m
British Airways
Deal found 8/6£633
Thu 18/614:05
LHR
-
PHL
1 stop12h 29m
Air Canada
Wed 24/606:00
PHL
-
LHR
2 stops21h 35m
Air Canada
Deal found 9/6£634
Thu 18/609:15
LHR
-
PHL
Nonstop7h 55m
Iberia
Wed 24/619:20
PHL
-
LHR
Nonstop7h 30m
Iberia
Deal found 9/6£635
Tue 6/1007:50
LHR
-
PHL
1 stop12h 55m
Iberia
Sat 17/1022:20
PHL
-
LHR
Nonstop7h 00m
Iberia
Deal found 9/6£636
Sat 10/1013:45
LHR
-
PHL
Nonstop7h 55m
American Airlines
Tue 13/1018:50
PHL
-
LHR
1 stop10h 20m
American Airlines
Deal found 9/6£638
Fri 10/709:15
LHR
-
PHL
Nonstop8h 00m
British Airways
Thu 16/717:30
PHL
-
LHR
1 stop9h 30m
British Airways
Deal found 9/6£639
Thu 2/712:30
LHR
-
PHL
Nonstop8h 05m
British Airways
Mon 6/718:50
PHL
-
LHR
Nonstop7h 00m
British Airways
Deal found 9/6£639
Sat 10/1013:45
LHR
-
PHL
Nonstop7h 55m
British Airways
Wed 14/1022:20
PHL
-
LHR
Nonstop7h 00m
British Airways
Deal found 9/6£640
Sat 17/1011:20
LHR
-
PHL
3 stops27h 30m
TAP AIR PORTUGAL
Sat 7/1118:30
PHL
-
LHR
2 stops18h 00m
TAP AIR PORTUGAL
Deal found 9/6£641
Fri 9/1007:00
LHR
-
PHL
1 stop11h 50m
Finnair
Wed 14/1018:45
PHL
-
LHR
Nonstop7h 05m
Finnair
Deal found 9/6£642
Fri 10/709:15
LHR
-
PHL
Nonstop8h 00m
British Airways
Sun 26/722:15
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 8/6£642

Find 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 9 June 2026.

Round-trip from

£633

One-way from

£343

Popular in

July

Cheapest in

September

Average price

£715

Good round-trip deal

£623 or less

Good one-way deal

£453 or less
British Airways
  • British Airways
  • 20/6-1/7
  • 1 total stop
  • 17h 25m total
  • London to Philadelphia
Search Deals
JetBlue
  • JetBlue
  • 1/9
  • 1 total stop
  • 16h 20m total
  • London to Philadelphia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£62 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Philadelphia.
Search Deals
Price to beat on a one-way flight from London Heathrow to Philadelphia.
Search Deals

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 9 June 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 11/10

13:45-16:40

Nonstop7h 55m

Philadelphia

Wed 14/10

22:20-10:20

Nonstop7h 00m

£640

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 8/10

13:45-16:40

Nonstop7h 55m

Philadelphia

Sun 18/10

22:20-10:20

Nonstop7h 00m

£655

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 8/10

13:45-16:40

Nonstop7h 55m

Philadelphia

Sat 17/10

22:20-10:20

Nonstop7h 00m

£655

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 2/7

07:45-23:20

2 stops20h 35m

Philadelphia

Thu 9/7

10:39-05:55

2 stops14h 16m

£656

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 29/8

12:30-15:35

Nonstop8h 05m

Philadelphia

Sat 12/9

22:20-10:20

Nonstop7h 00m

£670

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 26/6

12:40-22:44

2 stops15h 04m

Philadelphia

Sun 28/6

15:10-10:15

2 stops14h 05m

£717

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 24/7

09:30-16:05

1 stop11h 35m

Philadelphia

Sun 26/7

19:45-10:40

1 stop9h 55m

£733

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 19/6

09:15-12:10

Nonstop7h 55m

Philadelphia

Mon 30/11

19:50-07:50

Nonstop7h 00m

£775

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 24/7

09:15-12:15

Nonstop8h 00m

Philadelphia

Sun 26/7

19:36-18:55

1 stop18h 19m

£803

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 17/7

12:30-15:35

Nonstop8h 05m

Philadelphia

Fri 18/9

20:25-12:40

1 stop11h 15m

£813

Flights are sorted by cheapest return flights first.

Deals found on 4/6

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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?

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Philadelphia, you should look to book at least 73 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £534). Flying from London Heathrow Airport to Philadelphia in July is currently the most expensive (average of £726). 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 9 June 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 9 June 2026.
Get a feel of what it's like to fly with Finnair,Aer Lingus, andAmerican Airlines 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.
Finnair
7.7
Good
1,405 reviews
Check prices

Boarding

7.7

Crew

8.2

Comfort

7.4

Overall

7.7

Food

6.7

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
Finnair
7.7
Good
1,405 reviews
Finnair
7.7
Good
1,405 reviews
Check prices

Boarding

7.7

Crew

8.2

Comfort

7.4

Overall

7.7

Food

6.7

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
Aer Lingus
7.3
Good
1,599 reviews
Finnair
7.7
Good
1,405 reviews
Check prices

Boarding

7.7

Crew

8.2

Comfort

7.4

Overall

7.7

Food

6.7

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
American Airlines
7.1
Good
11,644 reviews
Finnair
7.7
Good
1,405 reviews
Check prices

Boarding

7.7

Crew

8.2

Comfort

7.4

Overall

7.7

Food

6.7

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
Iberia
7.0
Good
3,230 reviews
Finnair
7.7
Good
1,405 reviews
Check prices

Boarding

7.7

Crew

8.2

Comfort

7.4

Overall

7.7

Food

6.7

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.
British Airways
6.7
Okay
8,031 reviews
Finnair
7.7
Good
1,405 reviews
Check prices

Boarding

7.7

Crew

8.2

Comfort

7.4

Overall

7.7

Food

6.7

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.

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 15 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 British Airways and United Airlines fly from London Heathrow Airport to Philadelphia in about 7h 55m. The time it takes to get you to your destination can typically vary by up to 12h 40m. The distance between London Heathrow Airport and Philadelphia is about 3533 mi. This flight may include one or multiple stops.

  • 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 Lufthansa. Our recent data shows that you can find tickets from as low as £390 on this airline. Additional options worth looking into are JetBlue and Air Canada, starting at £421 and £437 round-trip. Lufthansa is currently priced 37% 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 JetBlue, with whom users have recently found tickets for as low as £326. However, be on the lookout for offers from Aer Lingus and British Airways, 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 Malaysia Airlines (87%), American Airlines (83%) or Finnair (83%) 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 £366. On average you can expect to pay £961. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £525.

  • 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £534). Flying from London Heathrow Airport to Philadelphia in July is currently the most expensive (average of £726). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 9 June 2026.
British Airways flights from London Heathrow to Philadelphia
Finnair flights from London Heathrow to Philadelphia
Iberia flights from London Heathrow to Philadelphia

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 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£390Average£570FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
JetBlueCheapest£421Average£604FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£437Average£489FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£447Average£597FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£458Average£609FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£464Average£586FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Aer LingusCheapest£466Average£696FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£467Average£664FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
IberiaCheapest£494Average£647FlexibilityNo cancel feeOn-time77%
Search Iberia 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 Heathrow to Philadelphia?

When you search for this flight from Heathrow to Philadelphia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Philadelphia 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 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.