Cheap flights from London Heathrow Airport to Philadelphia from £286

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 16/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
17 Jan — 24 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or February, booked 25 days in advance, depart on a Wednesday or Tuesday 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 18 December 2025.

Mon 29/1208:15LHR - PHL
1 stop12h 20mAmerican Airlines
Mon 12/121:25PHL - LHR
1 stop12h 25mAmerican Airlines
Deal found 17/12£532
Tue 23/1219:55LHR - PHL
2 stops23h 00mBritish Airways
Wed 7/121:25PHL - LHR
1 stop11h 00mBritish Airways
Deal found 16/12£576
Wed 24/1208:25LHR - PHL
1 stop12h 10mBritish Airways
Mon 5/121:35PHL - LHR
1 stop28h 25mBritish Airways
Deal found 16/12£593
Tue 30/1213:25LHR - PHL
2 stops31h 24mAir Canada
Thu 8/115:30PHL - LHR
1 stop10h 40mAir Canada
Deal found 16/12£594
Tue 30/1206:45LHR - PHL
1 stop13h 50mMultiple Airlines
Thu 8/116:44PHL - LHR
1 stop9h 16mMultiple Airlines
Deal found 15/12£604
Mon 29/1209:20LHR - PHL
1 stop13h 50mJetBlue
Mon 12/113:30PHL - LHR
1 stop12h 25mJetBlue
Deal found 16/12£610
Mon 29/1216:30LHR - PHL
1 stop28h 05mIberia
Mon 12/121:35PHL - LHR
2 stops14h 40mIberia
Deal found 17/12£628
Sat 27/1207:50LHR - PHL
1 stop11h 05mBritish Airways
Tue 6/121:31PHL - LHR
1 stop16h 29mBritish Airways
Deal found 17/12£648
Tue 30/1206:45LHR - PHL
1 stop13h 50mBritish Airways
Thu 8/116:51PHL - LHR
1 stop14h 09mBritish Airways
Deal found 16/12£652

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 18 December 2025.

Round-trip from

£530

One-way from

£286

Popular in

December

Cheapest in

March

Average price

£684

Good round-trip deal

£567 or less

Good one-way deal

£429 or less
Air Canada
  • Air Canada
  • 12/1-19/1
  • 4 total stops
  • 53h 46m total
  • London to Philadelphia
JetBlue
  • JetBlue
  • 16/2
  • 1 total stop
  • 18h 25m total
  • London to Philadelphia
Highest demand for flights based on searches. 5% potential increase in price (£24 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 December 2025
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.

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 18 December 2025.
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

Fri 16/1

07:30-18:54

2 stops16h 24m

Philadelphia

Fri 23/1

16:35-20:35

2 stops47h 00m

£543

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 15/5

07:30-22:44

2 stops20h 14m

Philadelphia

Tue 19/5

07:10-21:00

2 stops32h 50m

£545

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 19/1

06:15-15:40

1 stop14h 25m

Philadelphia

Mon 26/1

18:35-06:35

Nonstop7h 00m

£548

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 18/3

06:50-19:09

2 stops16h 19m

Philadelphia

Sun 22/3

15:30-07:10

1 stop11h 40m

£562

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 7/5

07:25-22:44

2 stops20h 19m

Philadelphia

Thu 4/6

07:10-06:30

2 stops18h 20m

£564

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 8/4

08:25-17:30

1 stop14h 05m

Philadelphia

Tue 14/4

08:20-06:30

1 stop17h 10m

£571

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 8/4

09:30-22:43

2 stops18h 13m

Philadelphia

Tue 14/4

13:27-10:00

2 stops15h 33m

£571

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 1/2

09:00-08:47

3 stops28h 47m

Philadelphia

Sun 8/2

08:20-21:40

3 stops32h 20m

£578

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 7/4

13:30-10:28

2 stops25h 58m

Philadelphia

Sun 12/4

16:25-21:00

2 stops47h 35m

£581

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 6/4

13:30-16:00

1 stop31h 30m

Philadelphia

Tue 14/4

10:00-06:30

2 stops15h 30m

£582

Flights are sorted by cheapest return flights first.

Deals found on 17/12

Showing 1-10 of 20 results
1
2

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 12 December 2025.

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 £310). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £342). 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 18 December 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Philadelphia in the afternoon. If you’re flexible enough to do this you can expect to save up to 19% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from London Heathrow Airport to Philadelphia?

Use this chart to determine the cheapest time to fly return from Heathrow to Philadelphia. Price data was last updated on 13 December 2025.

Travellers seeking maximum savings on their London Heathrow Airport to Philadelphia flight should consider departing on Friday afternoons when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 18 December 2025.
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.

Food

6.7

Boarding

7.6

Entertainment

6.9

Crew

8.1

Overall

7.6

Comfort

7.4

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.

Food

6.7

Boarding

7.6

Entertainment

6.9

Crew

8.1

Overall

7.6

Comfort

7.4

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.

Food

6.7

Boarding

7.6

Entertainment

6.9

Crew

8.1

Overall

7.6

Comfort

7.4

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.

Food

6.7

Boarding

7.6

Entertainment

6.9

Crew

8.1

Overall

7.6

Comfort

7.4

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.

Food

6.7

Boarding

7.6

Entertainment

6.9

Crew

8.1

Overall

7.6

Comfort

7.4

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.

Food

6.7

Boarding

7.6

Entertainment

6.9

Crew

8.1

Overall

7.6

Comfort

7.4

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 8 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 United Airlines fly from London Heathrow Airport to Philadelphia in about 16h 24m. 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 £303 on this airline. Additional options worth looking into are Air Canada and JetBlue, starting at £339 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 £359. 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 Malaysia Airlines (91%), Finnair (87%) or American Airlines (86%) 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 £387. On average you can expect to pay £776. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £389.

  • 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 £310). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £342). 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 18 December 2025.

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 18 December 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£303Average£424FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest£339Average£471FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
JetBlueCheapest£402Average£605FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
LufthansaCheapest£403Average£504FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£438Average£550FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£447Average£557FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£454Average£600FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
IberiaCheapest£455Average£556FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£465Average£673FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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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?

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.

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