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$390+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
Apr 24 — May 11
Fri 4/24
Fri 5/1
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 February, booked 11 days in advance, depart on a Friday or Thursday 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 March 25, 2026.

This Travcart deal was found by Cheapflights users on 3/20. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/138:40 am
LHR
-
PHL
1 stop27h 55m
JetBlue
Wed 5/206:33 pm
PHL
-
LHR
1 stop30h 57m
JetBlue
Deal found 3/20$705
This Travcart deal was found by Cheapflights users on 3/22. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/298:40 am
LHR
-
PHL
1 stop13h 58m
JetBlue
Tue 5/126:00 am
PHL
-
LHR
1 stop19h 30m
JetBlue
Deal found 3/22$706
This flugladen.de deal was found by Cheapflights users on 3/22. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:40 am
LHR
-
PHL
1 stop13h 58m
JetBlue
Mon 4/276:00 am
PHL
-
LHR
1 stop19h 30m
JetBlue
Deal found 3/22$712
This deal was found by Cheapflights users on 3/24. 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.
Fri 4/1712:15 pm
LHR
-
PHL
1 stop11h 39m
United Airlines
Sun 4/197:45 pm
PHL
-
LHR
1 stop9h 55m
United Airlines
Deal found 3/24$715
This Travcart deal was found by Cheapflights users on 3/25. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:40 am
LHR
-
PHL
1 stop17h 41m
JetBlue
Mon 6/159:12 am
PHL
-
LHR
1 stop16h 18m
JetBlue
Deal found 3/25$718
This TravelUp deal was found by Cheapflights users on 3/23. 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.
Wed 9/28:40 am
LHR
-
PHL
1 stop16h 09m
JetBlue
Sat 9/126:10 pm
PHL
-
LHR
1 stop31h 20m
JetBlue
Deal found 3/23$719
This Travcart deal was found by Cheapflights users on 3/23. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/78:40 am
LHR
-
PHL
1 stop13h 55m
JetBlue
Sun 4/198:25 am
PHL
-
LHR
1 stop17h 05m
JetBlue
Deal found 3/23$720
This TravelUp deal was found by Cheapflights users on 3/25. 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.
Tue 10/68:40 am
LHR
-
PHL
1 stop18h 10m
JetBlue
Fri 10/910:20 am
PHL
-
LHR
1 stop15h 10m
JetBlue
Deal found 3/25$722
This Travcart deal was found by Cheapflights users on 3/23. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/128:40 am
LHR
-
PHL
1 stop28h 00m
JetBlue
Sun 4/196:00 am
PHL
-
LHR
1 stop19h 30m
JetBlue
Deal found 3/23$723
This Travcart deal was found by Cheapflights users on 3/23. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/168:40 am
LHR
-
PHL
1 stop16h 09m
JetBlue
Sun 6/288:45 pm
PHL
-
LHR
1 stop28h 45m
JetBlue
Deal found 3/23$724
This ChecknFly deal was found by Cheapflights users on 3/23. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/61:10 pm
LHR
-
PHL
1 stop12h 48m
Finnair
Wed 5/203:35 pm
PHL
-
LHR
1 stop13h 40m
Finnair
Deal found 3/23$725

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 March 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$698
(The Travel House)

One-way from

$390
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$746

Good round-trip deal

$784 or less

Good one-way deal

$614 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. 8% potential increase in price ($72 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 25, 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 round-trip

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 5/6

10:50 am-12:59 am

2 stops19h 09m

Philadelphia

Mon 5/11

10:25 am-6:30 am

2 stops15h 05m

$753

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 6/6

8:40 am-6:50 pm

1 stop15h 10m

Philadelphia

Thu 9/24

10:20 am-6:30 am

1 stop15h 10m

$797

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/4

9:30 am-4:05 pm

1 stop11h 35m

Philadelphia

Mon 5/11

7:45 pm-10:40 am

1 stop9h 55m

$807

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 5/8

7:25 am-7:17 pm

2 stops16h 52m

Philadelphia

Fri 5/15

4:20 pm-9:00 pm

2 stops47h 40m

$835

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 4/8

10:50 am-12:59 am

2 stops19h 09m

Philadelphia

Sun 4/19

9:15 am-9:00 pm

2 stops30h 45m

$841

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 4/6

7:25 am-12:59 am

2 stops22h 34m

Philadelphia

Sun 4/12

4:25 pm-9:00 pm

2 stops47h 35m

$901

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/11

11:20 am-7:35 am

3 stops25h 15m

Philadelphia

Mon 5/18

6:33 pm-5:45 pm

2 stops18h 12m

$925
Quickest round-trip

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 5/7

9:15 am-12:10 pm

Nonstop7h 55m

Philadelphia

Sat 5/16

2:45 pm-8:05 am

1 stop12h 20m

$931

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 4/5

7:25 am-9:32 pm

2 stops19h 07m

Philadelphia

Mon 4/13

7:45 pm-8:40 pm

2 stops19h 55m

$936

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 6/6

11:20 am-8:31 am

3 stops26h 11m

Philadelphia

Thu 9/24

6:10 pm-5:45 pm

2 stops18h 35m

$952

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 23 resultsSorted by cheapest first
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 March.
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 March 13, 2026.

The best time to book flights from London Heathrow Airport to Philadelphia is 11 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 $416). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of $457). 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 March 25, 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 March 25, 2026.
Peruse reviews from past customers who have flown with Aer Lingus,American Airlines, andIberia 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.
Aer Lingus
7.2
Good
1,487 reviews

Boarding

7.4

Crew

8.1

Entertainment

7.0

Overall

7.2

Food

6.6

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.
Aer Lingus
7.2
Good
1,487 reviews
Aer Lingus
7.2
Good
1,487 reviews

Boarding

7.4

Crew

8.1

Entertainment

7.0

Overall

7.2

Food

6.6

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.
American Airlines
7.1
Good
11,494 reviews
Aer Lingus
7.2
Good
1,487 reviews

Boarding

7.4

Crew

8.1

Entertainment

7.0

Overall

7.2

Food

6.6

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.
Iberia
7.0
Good
3,153 reviews
Aer Lingus
7.2
Good
1,487 reviews

Boarding

7.4

Crew

8.1

Entertainment

7.0

Overall

7.2

Food

6.6

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.
British Airways
6.7
Okay
7,819 reviews
Aer Lingus
7.2
Good
1,487 reviews

Boarding

7.4

Crew

8.1

Entertainment

7.0

Overall

7.2

Food

6.6

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.

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 15h 10m. 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 $614 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 (87%), American Airlines (80%), Finnair( 80%).

  • 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 $1,356, our data indicates the cheapest price to be $567. The most popular route (London Heathrow - Philadelphia), is priced around $667.

  • 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 $416). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of $457). 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
Reading
King of Prussia
Camden
Ocean City
Lewes
Dewey Beach
Pottstown
Ephrata
Vineland
Milford
Cherry Hill
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Chester

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.

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 March 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$429Average$739FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$614Average$755FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$646Average$814FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$670Average$1,178FlexibilityNo cancel feeOn-timeN/A

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