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$281+ Cheap flights from Philadelphia (PHL) to Heathrow (LHR)

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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
Aug 22 — Aug 291
Sat 8/22
Sat 8/29
1 adult, Economy
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Find cheap flights from Philadelphia to Heathrow 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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Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in February or September, booked 14 days in advance, depart on a Wednesday or Monday and return on a Monday

Cheap flight deals from Philadelphia to Heathrow

Cheapest flights from Philadelphia to Heathrow
Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.

This CheapOair deal was found by Cheapflights users on 7/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/253:20 pm
PHL
-
LHR
1 stop11h 50m
Multiple Airlines
Fri 10/309:20 am
LHR
-
PHL
1 stop12h 12m
Multiple Airlines
Deal found 7/22$869
This Expedia deal was found by Cheapflights users on 7/21. 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.
Sun 8/239:12 am
PHL
-
LHR
1 stop16h 18m
Multiple Airlines
Tue 9/19:30 am
LHR
-
PHL
1 stop11h 35m
Multiple Airlines
Deal found 7/21$870
This Expedia deal was found by Cheapflights users on 7/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/29:12 am
PHL
-
LHR
1 stop16h 18m
JetBlue
Wed 9/168:40 am
LHR
-
PHL
1 stop14h 08m
JetBlue
Deal found 7/22$872
This Orbitz deal was found by Cheapflights users on 7/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:25 pm
PHL
-
LHR
1 stop10h 05m
JetBlue
Wed 9/238:40 am
LHR
-
PHL
1 stop14h 24m
JetBlue
Deal found 7/21$875
This Flysmarter deal was found by Cheapflights users on 7/21. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:12 am
PHL
-
LHR
1 stop16h 18m
JetBlue
Sat 9/128:40 am
LHR
-
PHL
1 stop14h 24m
JetBlue
Deal found 7/21$876
This Orbitz deal was found by Cheapflights users on 7/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/113:25 pm
PHL
-
LHR
1 stop10h 05m
Multiple Airlines
Mon 11/26:50 am
LHR
-
PHL
2 stops12h 54m
Multiple Airlines
Deal found 7/21$879
This Orbitz deal was found by Cheapflights users on 7/22. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/183:57 pm
PHL
-
LHR
1 stop9h 33m
JetBlue
Sun 9/208:40 am
LHR
-
PHL
1 stop30h 10m
JetBlue
Deal found 7/22$880
This Travelocity deal was found by Cheapflights users on 7/18. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:00 am
PHL
-
LHR
1 stop19h 30m
Multiple Airlines
Mon 11/26:50 am
LHR
-
PHL
2 stops12h 54m
Multiple Airlines
Deal found 7/18$881
This Priceline deal was found by Cheapflights users on 7/21. 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.
Sun 11/13:20 pm
PHL
-
LHR
2 stops15h 00m
Multiple Airlines
Fri 11/69:20 am
LHR
-
PHL
1 stop29h 19m
Multiple Airlines
Deal found 7/21$882

Find flight deals from Philadelphia to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Heathrow (LHR). 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 July 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$869
(CheapOair)

One-way from

$281
(KAYAK)

Popular in

June

Cheapest in

February

Average price

$1,290

Good round-trip deal

$1,004 or less

Good one-way deal

$456 or less
Provider with most accurate pricing for Philadelphia-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-London Heathrow flights.
Search Deals
From Philadelphia to London Heathrow
Search Deals
One-way flight from Philadelphia to London Heathrow
Search Deals
Highest demand for flights based on searches. 28% potential increase in price ($366 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Philadelphia to London Heathrow.
Search Deals
Price to beat on a one-way flight from Philadelphia to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Heathrow 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 July 23, 2026.
Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 8/29

9:00 am-6:30 am

1 stop16h 30m

London Heathrow

Tue 9/15

8:40 am-6:04 pm

1 stop14h 24m

$925

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 9/4

9:12 am-6:30 am

1 stop16h 18m

London Heathrow

Tue 9/15

8:40 am-6:04 pm

1 stop14h 24m

$932

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 10/24

6:45 pm-6:50 am

Nonstop7h 05m

London Heathrow

Wed 10/28

1:10 pm-5:15 pm

Nonstop8h 05m

$982

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 8/23

6:30 pm-10:05 am

1 stop10h 35m

London Heathrow

Tue 9/1

8:15 am-4:10 pm

1 stop12h 55m

$983

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 10/6

10:20 pm-10:20 am

Nonstop7h 00m

London Heathrow

Tue 10/13

8:15 pm-1:50 pm

1 stop22h 35m

$1,001

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 10/14

3:25 pm-5:45 pm

2 stops21h 20m

London Heathrow

Sun 10/18

11:20 am-9:50 am

3 stops27h 30m

$1,011

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 10/14

10:45 am-10:20 am

2 stops18h 35m

London Heathrow

Sat 10/24

11:20 am-9:39 am

3 stops27h 19m

$1,011
Quickest round-trip

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 8/26

6:45 pm-6:50 am

Nonstop7h 05m

London Heathrow

Tue 9/1

1:45 pm-4:40 pm

Nonstop7h 55m

$1,014

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 8/21

6:45 pm-6:50 am

Nonstop7h 05m

London Heathrow

Fri 8/28

6:20 am-4:10 pm

1 stop14h 50m

$1,033

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 10/9

6:00 am-12:45 pm

2 stops25h 45m

London Heathrow

Tue 10/13

7:50 pm-9:50 am

3 stops43h 00m

$1,041

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/21

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Philadelphia to Heathrow

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 Philadelphia to Heathrow in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice 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 Philadelphia-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-London Heathrow Airport 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 Philadelphia-London Heathrow Airport 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 Philadelphia to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Philadelphia 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 Philadelphia to London Heathrow Airport

How far ahead should I book a flight from Philadelphia to London Heathrow Airport?

Booking 13 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?

Currently, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of $704). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,484). 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 PHL to LHR?

Find hourly flight availability from Philadelphia to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 23, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to London Heathrow Airport as you normally would.

How much does it cost to fly round-trip from Philadelphia to London Heathrow Airport?

The best insider tips for Philadelphia to London Heathrow Airport 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 Philadelphia to London Heathrow Airport 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 Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated July 23, 2026.
Peruse reviews from past customers who have flown with Finnair,Aer Lingus, andAmerican Airlines from Philadelphia to London Heathrow Airport 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
1,422 reviews

Boarding

7.7

Overall

7.6

Food

6.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
Finnair
7.6
Good
1,422 reviews
Finnair
7.6
Good
1,422 reviews

Boarding

7.7

Overall

7.6

Food

6.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
Aer Lingus
7.3
Good
1,678 reviews
Finnair
7.6
Good
1,422 reviews

Boarding

7.7

Overall

7.6

Food

6.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
American Airlines
7.1
Good
11,835 reviews
Finnair
7.6
Good
1,422 reviews

Boarding

7.7

Overall

7.6

Food

6.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
Iberia
7.0
Good
3,258 reviews
Finnair
7.6
Good
1,422 reviews

Boarding

7.7

Overall

7.6

Food

6.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.
British Airways
6.7
Okay
8,124 reviews
Finnair
7.6
Good
1,422 reviews

Boarding

7.7

Overall

7.6

Food

6.7

Entertainment

6.9

Comfort

7.4

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Ronald,Sep 2023

SEA - LHR

Missed out on getting window seat. Middle not as comfortable for long flight.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Heathrow. 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 from for flights from Philadelphia to London Heathrow?

    Located just 7.0 mi from the city center, Philadelphia is the airport most travelers will use when flying to London Heathrow from Philadelphia. Booking flights from Philadelphia (PHL) to London Heathrow should be relatively easy as there are 15 daily outbound flights to London Heathrow from 6 different airlines.

  • How long is the flight from Philadelphia to London Heathrow Airport?

    JetBlue, British Airways, and Finnair can get you from Philadelphia to London Heathrow Airport in just under 7h. Your travel time can differ by up to 9h 30m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Philadelphia to London Heathrow Airport round-trip?

    According to our current data, Aer Lingus ($484), British Airways ($497), and American Airlines ($510) offers the cheapest pricing from Philadelphia to London Heathrow Airport. You may be able to fly from Philadelphia to London Heathrow Airport for 47% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Philadelphia to London Heathrow Airport one-way?

    The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as $174. However, be on the lookout for offers from TAP AIR PORTUGAL and American Airlines, as they are both options that can get you from Philadelphia to London Heathrow Airport for a low price.

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

    Consider Malaysia Airlines (83%), American Airlines (78%) or Finnair (78%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London Heathrow Airport.

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

    Looking for the cheapest flight from Philadelphia to London Heathrow Airport? While on average our users pay $2,757, our data indicates the cheapest price to be $350. The most popular route (Philadelphia - London Heathrow), is priced around $775.

  • Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Heathrow.

  • Can I find deals for business class flights from Philadelphia to Heathrow?

    Yes. Cheapflights offers flight deals from Philadelphia to Heathrow 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 Philadelphia to London Heathrow Airport?

    Currently, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of $704). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,484). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Wembley
Harrow
Eastleigh
Southend-on-Sea
Watford
Northampton
Dartford
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton

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 6 airlines flying from Philadelphia to Heathrow

Discover the top 6 airlines that operate flights from Philadelphia to Heathrow. 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 July 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$484Average$802FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$497Average$813FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$510Average$908FlexibilityNo cancel feeOn-time71%
FinnairCheapest$513Average$913FlexibilityNo cancel feeOn-time76%
IberiaCheapest$567Average$1,012FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$638Average$752FlexibilityNo cancel feeOn-time62%

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