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$546+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or September, 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 August 14, 2025.

Round-trip from

$634
(BYOjet)

One-way from

$546
(Ovago)

Popular in

July

Cheapest in

March

Average price

$908

Good round-trip deal

$721 or less

Good one-way deal

$752 or less
From London Heathrow to Philadelphia
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One-way flight from London Heathrow to Philadelphia
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Highest demand for flights based on searches. 11% potential increase in price ($93 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from London Heathrow to Philadelphia.
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Price to beat on a one-way flight from London Heathrow to Philadelphia.
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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 August 14, 2025.

This BYOjet deal was found by Cheapflights users on 8/11. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:50 amLHR - PHL
2 stops12h 48mAir Canada
Fri 10/310:35 amPHL - LHR
1 stop18h 25mAir Canada
Deal found 8/11$634
This United Airlines deal was found by Cheapflights users on 8/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/249:30 amLHR - PHL
1 stop11h 30mUnited Airlines
Sun 9/283:25 pmPHL - LHR
1 stop10h 05mUnited Airlines
Deal found 8/12$635
This The Travel House deal was found by Cheapflights users on 8/12. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/18:25 amLHR - PHL
1 stop30h 15mIcelandair
Sun 9/147:00 amPHL - LHR
2 stops32h 45mIcelandair
Deal found 8/12$636
This ChecknFly deal was found by Cheapflights users on 8/14. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:50 amLHR - PHL
2 stops12h 57mAir Canada
Thu 12/43:30 pmPHL - LHR
1 stop10h 40mAir Canada
Deal found 8/14$637
This Gotogate deal was found by Cheapflights users on 8/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/96:50 amLHR - PHL
2 stops13h 59mAir Canada
Tue 9/1610:35 amPHL - LHR
2 stops14h 55mAir Canada
Deal found 8/12$638
This ChecknFly deal was found by Cheapflights users on 8/12. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:50 amLHR - PHL
2 stops12h 47mAir Canada
Thu 9/1110:35 amPHL - LHR
1 stop18h 25mAir Canada
Deal found 8/12$639
This Air Canada deal was found by Cheapflights users on 8/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:50 amLHR - PHL
2 stops12h 48mMultiple Airlines
Thu 9/189:20 amPHL - LHR
1 stop19h 15mMultiple Airlines
Deal found 8/14$641
This Air Canada deal was found by Cheapflights users on 8/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:50 amLHR - PHL
2 stops12h 48mAir Canada
Sun 9/2110:35 amPHL - LHR
2 stops14h 55mAir Canada
Deal found 8/12$642
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 9/276:50 amLHR - PHL
2 stops15h 45mUnited Airlines
Sat 10/410:05 amPHL - LHR
2 stops18h 30mUnited Airlines
Deal found 8/13$643
This JetBlue deal was found by Cheapflights users on 8/13. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/278:25 amLHR - PHL
1 stop13h 50mJetBlue
Sat 10/410:20 amPHL - LHR
1 stop15h 10mJetBlue
Deal found 8/13$644
This lol.travel deal was found by Cheapflights users on 8/13. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/13:50 pmLHR - PHL
1 stop23h 04mAir Canada
Tue 9/93:25 pmPHL - LHR
1 stop13h 10mAir Canada
Deal found 8/13$645

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 August 14, 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 9/26

6:50 am-2:38 pm

2 stops12h 48m

Philadelphia

Fri 10/3

10:35 am-10:00 am

1 stop18h 25m

$634

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 9/24

9:30 am-4:00 pm

1 stop11h 30m

Philadelphia

Sun 9/28

3:25 pm-6:30 am

1 stop10h 05m

$635

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 10/9

8:25 am-5:45 pm

1 stop14h 20m

Philadelphia

Wed 10/15

3:10 pm-6:30 am

1 stop10h 20m

$636

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 9/1

8:25 am-9:40 am

1 stop30h 15m

Philadelphia

Sun 9/14

7:00 am-8:45 pm

2 stops32h 45m

$636

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 10/5

8:25 am-3:40 pm

1 stop12h 15m

Philadelphia

Wed 10/15

3:10 pm-6:30 am

1 stop10h 20m

$636

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 10/3

8:25 am-3:00 pm

1 stop11h 35m

Philadelphia

Wed 10/15

10:20 am-6:30 am

1 stop15h 10m

$636

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 10/6

8:25 am-5:45 pm

1 stop14h 20m

Philadelphia

Mon 10/13

10:20 am-6:30 am

1 stop15h 10m

$636

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 10/4

8:25 am-4:21 pm

1 stop12h 56m

Philadelphia

Wed 10/15

3:10 pm-6:30 am

1 stop10h 20m

$636

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 10/7

8:25 am-5:45 pm

1 stop14h 20m

Philadelphia

Sun 10/12

10:20 am-6:30 am

1 stop15h 10m

$636

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 9/3

6:50 am-10:08 pm

2 stops20h 18m

Philadelphia

Mon 9/22

3:25 pm-9:35 am

1 stop13h 10m

$637

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 22 results
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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 August 8, 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 August 14, 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 at noon.

Weekly flight availability from London Heathrow Airport to Philadelphia

Explore weekly flight availability from Heathrow to Philadelphia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 14, 2025.

The most flights from LHR to PHL are scheduled on a Monday (15 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (10 on average).

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 August 14, 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.
Finnair
7.6
Good
1,321 reviews

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.5

Overall

7.6

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.
Finnair
7.6
Good
1,321 reviews
Finnair
7.6
Good
1,321 reviews

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.5

Overall

7.6

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.
American Airlines
7.2
Good
10,000 reviews
Finnair
7.6
Good
1,321 reviews

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.5

Overall

7.6

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.
Aer Lingus
7.1
Good
1,214 reviews
Finnair
7.6
Good
1,321 reviews

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.5

Overall

7.6

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.
Iberia
7.0
Good
2,882 reviews
Finnair
7.6
Good
1,321 reviews

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.5

Overall

7.6

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.
British Airways
6.7
Okay
7,266 reviews
Finnair
7.6
Good
1,321 reviews

Crew

8.1

Food

6.7

Boarding

7.6

Comfort

7.5

Overall

7.6

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 14 inbound flights from London Heathrow per day from 5 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.

  • 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 $601, respectively. Iberia is currently priced 25% 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: Aer Lingus (67%), American Airlines (66%), Finnair( 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 $1,090, our data indicates the cheapest price to be $654. The most popular route (London Heathrow - Philadelphia), is priced around $549.

  • 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
Vineland
Wildwood
King of Prussia
Pottstown
Cherry Hill
Ocean City
Reading
Millville
Ephrata
Camden
Dewey Beach
Dover
Elkton
Essington
Willow Grove
Newark
Chester
Exton
Glen Mills
Springfield

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Alternative routes for Heathrow to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Heathrow to John F Kennedy Intl flights
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Gatwick to Reagan-National flights
Stansted to Dulles Intl flights
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Luton to Dulles Intl flights
Heathrow to Pittsburgh flights
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London City to Reagan-National flights
Southend to Newark flights
Stansted to Philadelphia flights
Luton to Philadelphia flights
Gatwick to Pittsburgh flights
Southend to John F Kennedy Intl flights
Stansted to Pittsburgh flights
Luton to Pittsburgh flights
Heathrow to Allentown flights
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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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$559Average$800FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$592Average$766FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$601Average$800FlexibilityNo cancel feeOn-time70%
FinnairCheapest$648Average$767FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$725Average$1,241FlexibilityNo cancel feeOn-timeN/A

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