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Philadelphia

$547+ 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
May 18 — May 251
Mon 5/18
Mon 5/25
1 adult, Economy
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Find cheap flights from Heathrow to Philadelphia with Cheapflights

1. Tell us where you want to go

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2. Select your favorite providers

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Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in September or February, booked 7 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 April 18, 2026.

This Globehunters deal was found by Cheapflights users on 4/13. 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 Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/18:40 am
LHR
-
PHL
1 stop16h 20m
JetBlue
Wed 7/158:28 am
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 4/13$770
This The Travel House deal was found by Cheapflights users on 4/14. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:30 am
LHR
-
PHL
1 stop13h 35m
Lufthansa
Sat 9/263:25 pm
PHL
-
LHR
2 stops48h 35m
Lufthansa
Deal found 4/14$774
This United Airlines deal was found by Cheapflights users on 4/13. 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 5/117:30 am
LHR
-
PHL
1 stop13h 35m
United Airlines
Mon 5/186:00 am
PHL
-
LHR
2 stops19h 30m
United Airlines
Deal found 4/13$782
This JetBlue deal was found by Cheapflights users on 4/17. 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.
Mon 5/118:40 am
LHR
-
PHL
1 stop13h 58m
JetBlue
Tue 5/269:21 am
PHL
-
LHR
1 stop16h 09m
JetBlue
Deal found 4/17$783
This JetBlue deal was found by Cheapflights users on 4/16. 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.
Mon 5/118:40 am
LHR
-
PHL
1 stop18h 01m
JetBlue
Sun 5/249:21 am
PHL
-
LHR
1 stop16h 09m
JetBlue
Deal found 4/16$784
This deal was found by Cheapflights users on 4/15. 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.
Thu 5/281:45 pm
LHR
-
PHL
Nonstop7h 50m
British Airways
Sat 6/136:45 pm
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 4/15$785
This United Airlines deal was found by Cheapflights users on 4/14. 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 9/217:30 am
LHR
-
PHL
2 stops18h 51m
United Airlines
Mon 10/1210:35 am
PHL
-
LHR
2 stops29h 25m
United Airlines
Deal found 4/14$787
This United Airlines deal was found by Cheapflights users on 4/16. 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 9/219:30 am
LHR
-
PHL
1 stop11h 35m
United Airlines
Mon 9/287:00 am
PHL
-
LHR
2 stops33h 00m
United Airlines
Deal found 4/16$788
This Cheapflightsfares deal was found by Cheapflights users on 4/13. 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 6/88:40 am
LHR
-
PHL
1 stop15h 10m
JetBlue
Mon 7/68:28 am
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 4/13$790
This American Airlines deal was found by Cheapflights users on 4/17. 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 11/211:40 am
LHR
-
PHL
1 stop13h 15m
American Airlines
Wed 1/207:50 pm
PHL
-
LHR
Nonstop7h 00m
American Airlines
Deal found 4/17$791

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 April 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$770
(Globehunters)

One-way from

$547
(KAYAK)

Popular in

August

Cheapest in

September

Average price

$785

Good round-trip deal

$869 or less

Good one-way deal

$685 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. 4% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 18, 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

Mon 5/4

9:00 am-12:59 am

2 stops20h 59m

Philadelphia

Mon 5/18

6:00 am-6:30 am

2 stops19h 30m

$822

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 5/16

7:25 am-9:44 pm

2 stops19h 19m

Philadelphia

Thu 5/21

6:00 am-6:30 am

2 stops19h 30m

$884

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/18

7:30 am-4:05 pm

1 stop13h 35m

Philadelphia

Mon 5/25

11:38 am-8:30 am

1 stop15h 52m

$887

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 5/17

5:50 pm-5:32 pm

2 stops28h 42m

Philadelphia

Sun 5/24

7:45 pm-9:35 pm

2 stops20h 50m

$905

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/11

12:30 pm-3:30 pm

Nonstop8h 00m

Philadelphia

Mon 5/18

6:30 pm-10:10 am

1 stop10h 40m

$917

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 5/3

9:30 am-4:05 pm

1 stop11h 35m

Philadelphia

Sun 5/10

8:30 pm-6:45 am

1 stop29h 15m

$923

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/18

9:55 am-10:09 pm

2 stops17h 14m

Philadelphia

Mon 5/25

5:17 pm-1:05 pm

2 stops14h 48m

$946

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 7/5

7:45 am-6:54 pm

2 stops16h 09m

Philadelphia

Sun 10/4

1:00 pm-6:45 am

1 stop12h 45m

$977

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 5/31

9:15 am-12:10 pm

Nonstop7h 55m

Philadelphia

Sun 6/7

6:30 pm-10:20 am

1 stop10h 50m

$996

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 6/11

9:15 am-12:10 pm

Nonstop7h 55m

Philadelphia

Mon 6/15

7:20 pm-7:50 am

Nonstop7h 30m

$1,059

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/13

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 April.
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
Justfly.comPrice 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

*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 April 10, 2026.

The best time to book flights from London Heathrow Airport to Philadelphia is 7 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of $676). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of $886). 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 April 18, 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 April 18, 2026.
Peruse reviews from past customers who have flown with Aer Lingus,American Airlines, andBritish Airways 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
7.3
Good
1,512 reviews

Entertainment

7.0

Boarding

7.4

Comfort

7.2

Crew

8.1

Food

6.6

Overall

7.3

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
7.3
Good
1,512 reviews
Aer Lingus
7.3
Good
1,512 reviews

Entertainment

7.0

Boarding

7.4

Comfort

7.2

Crew

8.1

Food

6.6

Overall

7.3

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
11,610 reviews
Aer Lingus
7.3
Good
1,512 reviews

Entertainment

7.0

Boarding

7.4

Comfort

7.2

Crew

8.1

Food

6.6

Overall

7.3

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
7,891 reviews
Aer Lingus
7.3
Good
1,512 reviews

Entertainment

7.0

Boarding

7.4

Comfort

7.2

Crew

8.1

Food

6.6

Overall

7.3

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 15 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 8h. 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 $610 and $614, respectively. Iberia is currently priced 27% 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 $479 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 (79%), 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 $1,383, our data indicates the cheapest price to be $568. The most popular route (London Heathrow - Philadelphia), is priced around $671.

  • 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of $676). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of $886). 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
King of Prussia
Reading
Camden
Ocean City
Lewes
Dewey Beach
Pottstown
Ephrata
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Chester
Newark

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 3 airlines flying from Heathrow to Philadelphia

Discover the top 3 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 April 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$614Average$759FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$646Average$814FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$670Average$1,178FlexibilityNo cancel feeOn-timeN/A

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