Philadelphia

$487+ Cheap flights from Heathrow (LHR) to Philadelphia (PHL)

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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
Oct 29 — Nov 51
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Heathrow to Philadelphia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or February, booked 79 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

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 September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$591
(United Airlines)

One-way from

$487
(Flightnetwork)

Popular in

December

Cheapest in

March

Average price

$678

Good round-trip deal

$637 or less

Good one-way deal

$656 or less
Provider with most accurate pricing for London Heathrow-Philadelphia flight deals.
Provider most trusted by Cheapflights users for London Heathrow-Philadelphia flights.
From London Heathrow to Philadelphia
One-way flight from London Heathrow to Philadelphia
Highest demand for flights based on searches. 3% potential increase in price ($30 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Average for round-trip flights in September 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.

Find flight deals from Heathrow to Philadelphia

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 September 29, 2025.

This United Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2111:30 amLHR - PHL
2 stops27h 08mUnited Airlines
Mon 12/1510:33 amPHL - LHR
2 stops14h 22mUnited Airlines
Deal found 9/29$591
This United Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/66:50 amLHR - PHL
2 stops19h 38mUnited Airlines
Mon 10/137:58 pmPHL - LHR
1 stop9h 42mUnited Airlines
Deal found 9/29$592
This Air Canada deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:50 amLHR - PHL
2 stops12h 57mMultiple Airlines
Thu 12/49:20 amPHL - LHR
2 stops16h 50mMultiple Airlines
Deal found 9/29$593
This American Airlines deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/37:50 amLHR - PHL
1 stop11h 05mAmerican Airlines
Mon 11/106:35 pmPHL - LHR
Nonstop7h 00mAmerican Airlines
Deal found 9/27$594
This JetBlue deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/289:20 amLHR - PHL
1 stop15h 20mJetBlue
Tue 11/44:52 pmPHL - LHR
1 stop9h 03mJetBlue
Deal found 9/28$595
This Expedia deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/63:50 pmLHR - PHL
1 stop11h 39mAir Canada
Mon 10/133:25 pmPHL - LHR
1 stop13h 10mAir Canada
Deal found 9/29$596
This Netflights deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/810:05 amLHR - PHL
Nonstop8h 00mBritish Airways
Wed 10/154:00 pmPHL - LHR
1 stop10h 50mBritish Airways
Deal found 9/27$597
This Netflights deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/812:30 pmLHR - PHL
Nonstop8h 05mBritish Airways
Wed 10/226:08 pmPHL - LHR
1 stop8h 42mBritish Airways
Deal found 9/29$598
This United Airlines deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/77:30 amLHR - PHL
1 stop13h 30mUnited Airlines
Sun 10/193:25 pmPHL - LHR
1 stop10h 05mUnited Airlines
Deal found 9/27$600
This United Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:30 amLHR - PHL
1 stop13h 30mUnited Airlines
Thu 1/221:10 pmPHL - LHR
2 stops15h 00mUnited Airlines
Deal found 9/29$601
This Cheapflightsfares deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:30 amLHR - PHL
1 stop12h 25mBritish Airways
Mon 12/296:35 pmPHL - LHR
Nonstop7h 00mBritish Airways
Deal found 9/27$602

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated September 29, 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

Wed 10/29

9:20 am-8:40 pm

1 stop15h 20m

Philadelphia

Thu 11/6

9:22 am-6:55 am

1 stop16h 33m

$593

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 10/29

9:20 am-8:40 pm

1 stop15h 20m

Philadelphia

Wed 11/5

4:52 pm-6:55 am

1 stop9h 03m

$593

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 10/28

9:20 am-8:40 pm

1 stop15h 20m

Philadelphia

Thu 11/6

9:22 am-6:55 am

1 stop16h 33m

$593

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 10/28

9:20 am-8:40 pm

1 stop15h 20m

Philadelphia

Wed 11/5

9:22 am-6:55 am

1 stop16h 33m

$593

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 10/9

6:30 am-4:00 pm

1 stop14h 30m

Philadelphia

Sun 10/19

1:05 pm-6:20 am

1 stop12h 15m

$599

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 3/5

6:00 am-10:56 pm

2 stops21h 56m

Philadelphia

Mon 3/9

4:35 pm-2:05 pm

2 stops17h 30m

$606

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 11/3

10:00 am-11:05 pm

2 stops18h 05m

Philadelphia

Mon 11/10

1:25 pm-7:50 am

1 stop13h 25m

$624

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 11/3

10:15 am-1:25 pm

Nonstop8h 10m

Philadelphia

Mon 11/10

6:35 pm-6:35 am

Nonstop7h 00m

$626

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 10/28

11:30 am-11:05 pm

2 stops15h 35m

Philadelphia

Mon 11/3

12:23 pm-10:50 am

2 stops17h 27m

$629

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 11/26

6:30 am-4:43 pm

2 stops15h 13m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

Showing 1-10 of 19 results
1
2

Compare providers for flights from Heathrow to Philadelphia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Philadelphia in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
Thrive TravelPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Philadelphia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for London Heathrow Airport to Philadelphia flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Philadelphia trip
Airports
LHR

For a smooth departure, ensure all liquids are in one small bag to avoid lengthy security checks at Heathrow.

Read more about LHRby Ramsey Qubein
PHL

For a quick trip to Center City, use the SEPTA Airport Line. It's efficient and operates from 5:00 a.m. to midnight.

Read more about PHLby Mark Chesnut
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut

Mark Chesnut

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 round-trip 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 round-trip flight from Heathrow to Philadelphia. Price data was last updated on September 26, 2025.

The best time to book flights from London Heathrow Airport to Philadelphia is 79 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 London Heathrow Airport to Philadelphia?

Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of $236). Flying from London Heathrow Airport to Philadelphia in March is currently the most expensive (average of $295). 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 September 29, 2025.

When flying from London Heathrow Airport to Philadelphia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 43% versus a flight in the morning.

How much does it cost to fly round-trip 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 September 29, 2025.
Peruse reviews from past customers who have flown with Finnair, American Airlines, and Aer Lingus from London Heathrow Airport to Philadelphia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

7.6

Food

6.7

Comfort

7.4

Overall

7.6

Crew

8.1

Entertainment

6.9

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.

Boarding

7.6

Food

6.7

Comfort

7.4

Overall

7.6

Crew

8.1

Entertainment

6.9

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.

Boarding

7.6

Food

6.7

Comfort

7.4

Overall

7.6

Crew

8.1

Entertainment

6.9

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.

Boarding

7.6

Food

6.7

Comfort

7.4

Overall

7.6

Crew

8.1

Entertainment

6.9

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.

Boarding

7.6

Food

6.7

Comfort

7.4

Overall

7.6

Crew

8.1

Entertainment

6.9

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.

Boarding

7.6

Food

6.7

Comfort

7.4

Overall

7.6

Crew

8.1

Entertainment

6.9

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 15 inbound flights from London Heathrow per day from 5 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?

    Departing from London Heathrow Airport to Philadelphia will take you 14h 30m. 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?

    Flying on Iberia is currently your cheapest option to Philadelphia, with prices starting at $559. Additional round-trip tickets that might be worth considering are offered by American Airlines and British Airways, with the lowest prices starting at $592 and $619, respectively. Iberia is currently priced 26% below the average price you’ll pay for this route.

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

    Before booking your flight to Philadelphia from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: Malaysia Airlines (67%), Iberia (67%), Aer Lingus( 66%).

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

    Looking for the cheapest flight from London Heathrow Airport to Philadelphia? While on average our users pay $1,237, our data indicates the cheapest price to be $440. The most popular route (London Heathrow - Philadelphia), is priced around $502.

  • 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 vacation 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of $236). Flying from London Heathrow Airport to Philadelphia in March is currently the most expensive (average of $295). 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

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
Vineland
King of Prussia
Pottstown
Reading
Ocean City
Dewey Beach
Ephrata
Camden
Cherry Hill
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace
Plymouth Meeting

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Heathrow to Philadelphia

Discover the top 5 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 2,558,603 searches. Data last updated September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$559Average$826FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$592Average$831FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$619Average$784FlexibilityNo cancel feeOn-time70%
FinnairCheapest$642Average$767FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$670Average$1,223FlexibilityNo cancel feeOn-timeN/A

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