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$426+ 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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
Mar 14 — Mar 211
Sat 3/14
Sat 3/21
1 adult, Economy
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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”

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Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in September or March, booked 68 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap 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 February 12, 2026.

This TravelUp deal was found by Cheapflights users on 2/12. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/69:20 am
LHR
-
PHL
1 stop18h 16m
JetBlue
Sun 3/156:00 am
PHL
-
LHR
1 stop20h 55m
JetBlue
Deal found 2/12$587
This deal was found by Cheapflights users on 2/11. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:40 am
LHR
-
PHL
1 stop13h 58m
JetBlue
Sat 5/303:15 pm
PHL
-
LHR
1 stop10h 15m
JetBlue
Deal found 2/11$593
This Expedia deal was found by Cheapflights users on 2/9. 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 2/239:20 am
LHR
-
PHL
1 stop17h 47m
JetBlue
Mon 3/93:02 pm
PHL
-
LHR
1 stop11h 53m
JetBlue
Deal found 2/9$607
This JetBlue deal was found by Cheapflights users on 2/10. 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.
Wed 3/49:20 am
LHR
-
PHL
1 stop18h 16m
JetBlue
Mon 3/93:02 pm
PHL
-
LHR
1 stop11h 53m
JetBlue
Deal found 2/10$608
This Expedia deal was found by Cheapflights users on 2/10. 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 3/29:20 am
LHR
-
PHL
1 stop18h 16m
JetBlue
Mon 3/93:02 pm
PHL
-
LHR
1 stop11h 53m
JetBlue
Deal found 2/10$611
This TravelUp deal was found by Cheapflights users on 2/10. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/99:20 am
LHR
-
PHL
1 stop17h 16m
JetBlue
Thu 5/78:25 am
PHL
-
LHR
1 stop17h 05m
JetBlue
Deal found 2/10$613
This Priceline deal was found by Cheapflights users on 2/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/99:20 am
LHR
-
PHL
1 stop17h 16m
JetBlue
Mon 3/166:00 am
PHL
-
LHR
1 stop20h 55m
JetBlue
Deal found 2/9$614
This Expedia deal was found by Cheapflights users on 2/11. 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.
Wed 2/259:20 am
LHR
-
PHL
1 stop18h 16m
JetBlue
Sat 2/286:00 am
PHL
-
LHR
1 stop19h 55m
JetBlue
Deal found 2/11$616
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/259:20 am
LHR
-
PHL
1 stop18h 16m
JetBlue
Mon 3/96:00 am
PHL
-
LHR
1 stop20h 55m
JetBlue
Deal found 2/10$618
This Cheapflightsfares deal was found by Cheapflights users on 2/11. 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.
Mon 3/29:20 am
LHR
-
PHL
1 stop18h 16m
JetBlue
Sun 3/86:00 am
PHL
-
LHR
1 stop20h 55m
JetBlue
Deal found 2/11$621
This Cheapflightsfares deal was found by Cheapflights users on 2/11. 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 3/119:20 am
LHR
-
PHL
1 stop17h 16m
JetBlue
Thu 3/199:54 am
PHL
-
LHR
1 stop17h 01m
JetBlue
Deal found 2/11$624

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 February 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$592
(The Travel House)

One-way from

$426
(TravelUp)

Popular in

August

Cheapest in

September

Average price

$787

Good round-trip deal

$647 or less

Good one-way deal

$594 or less
Provider with most accurate pricing for London Heathrow-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-Philadelphia flights.
Search Deals
From London Heathrow to Philadelphia
Search Deals
One-way flight from London Heathrow to Philadelphia
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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

 
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 February 12, 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

Mon 5/11

8:40 am-5:38 pm

1 stop13h 58m

Philadelphia

Mon 5/18

8:25 am-6:30 am

1 stop17h 05m

$638

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 3/11

7:30 am-7:09 pm

2 stops15h 39m

Philadelphia

Wed 3/18

7:25 am-9:20 am

2 stops21h 55m

$659

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 5/6

7:30 am-4:05 pm

1 stop13h 35m

Philadelphia

Wed 5/20

10:25 am-9:00 pm

2 stops29h 35m

$670

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 4/20

10:50 am-12:45 am

2 stops18h 55m

Philadelphia

Mon 5/4

10:25 am-9:00 pm

2 stops29h 35m

$674

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 4/29

9:30 am-12:45 am

2 stops20h 15m

Philadelphia

Wed 5/13

4:20 pm-9:00 pm

2 stops23h 40m

$676

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/11

8:40 am-5:38 pm

1 stop13h 58m

Philadelphia

Mon 7/27

9:12 am-6:30 am

1 stop16h 18m

$689

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 5/12

8:40 am-9:40 pm

1 stop18h 00m

Philadelphia

Mon 7/27

9:12 am-6:30 am

1 stop16h 18m

$689

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 3/6

12:05 pm-10:44 pm

2 stops39h 39m

Philadelphia

Sun 3/15

4:35 pm-8:35 pm

2 stops24h 00m

$703

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 3/19

1:30 pm-2:17 pm

2 stops28h 47m

Philadelphia

Sun 3/22

7:25 am-8:35 pm

2 stops33h 10m

$711

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 3/19

7:30 am-5:05 pm

1 stop13h 35m

Philadelphia

Sun 3/22

7:25 am-8:35 pm

2 stops33h 10m

$716

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

Showing 1-10 of 21 results
1
2
3

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy1 starTrust Score*2 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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.

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 February 6, 2026.

The best time to book flights from London Heathrow Airport to Philadelphia is 68 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of $421). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of $458). 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 February 12, 2026.

When flying from London Heathrow Airport to Philadelphia, 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 to fly round-trip from London Heathrow Airport to Philadelphia?

The best insider tips for London Heathrow Airport to Philadelphia flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Philadelphia trip
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

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

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

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 February 12, 2026.
Peruse reviews from past customers who have flown with American Airlines, Aer Lingus, and Iberia 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.
American Airlines
7.2
Good
11,277 reviews

Overall

7.2

Food

6.4

Entertainment

6.9

Comfort

7.2

Crew

8.0

Boarding

7.5

Reviews

1 / 20
8.0
Excellent

Cameron,Nov 2025

LHR - LIS

This trip was probably the worst one we have ever had on British Airways!!!
American Airlines
7.2
Good
11,277 reviews
American Airlines
7.2
Good
11,277 reviews

Overall

7.2

Food

6.4

Entertainment

6.9

Comfort

7.2

Crew

8.0

Boarding

7.5

Reviews

1 / 20
8.0
Excellent

Cameron,Nov 2025

LHR - LIS

This trip was probably the worst one we have ever had on British Airways!!!
Aer Lingus
7.2
Good
1,449 reviews
American Airlines
7.2
Good
11,277 reviews

Overall

7.2

Food

6.4

Entertainment

6.9

Comfort

7.2

Crew

8.0

Boarding

7.5

Reviews

1 / 20
8.0
Excellent

Cameron,Nov 2025

LHR - LIS

This trip was probably the worst one we have ever had on British Airways!!!
Iberia
7.0
Good
3,114 reviews
American Airlines
7.2
Good
11,277 reviews

Overall

7.2

Food

6.4

Entertainment

6.9

Comfort

7.2

Crew

8.0

Boarding

7.5

Reviews

1 / 20
8.0
Excellent

Cameron,Nov 2025

LHR - LIS

This trip was probably the worst one we have ever had on British Airways!!!
British Airways
6.7
Okay
7,737 reviews
American Airlines
7.2
Good
11,277 reviews

Overall

7.2

Food

6.4

Entertainment

6.9

Comfort

7.2

Crew

8.0

Boarding

7.5

Reviews

1 / 20
8.0
Excellent

Cameron,Nov 2025

LHR - LIS

This trip was probably the worst one we have ever had on British Airways!!!

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 7 inbound flights from London Heathrow per day from 4 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 13h 58m. 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 $429. Additional round-trip tickets that might be worth considering are offered by British Airways and American Airlines, with the lowest prices starting at $598 and $646, respectively. Iberia is currently priced 44% 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?

    To fly one-way, consider booking your trip with Finnair, which is currently one of the cheapest options available, starting at $466. Aer Lingus flights start at $483 while deals on American Airlines start at $490 one-way.

  • 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 (74%), American Airlines (73%), Finnair( 73%).

  • 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 $1,353, our data indicates the cheapest price to be $460. The most popular route (London Heathrow - Philadelphia), is priced around $567.

  • 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of $421). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of $458). 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
Pottstown
Reading
Ocean City
King of Prussia
Cherry Hill
Lewes
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Newark

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Heathrow to Philadelphia

Discover the top 4 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 February 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$429Average$794FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$598Average$756FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$646Average$814FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$670Average$1,178FlexibilityNo cancel feeOn-timeN/A

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