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$340+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
May 26 — Jun 21
Tue 5/26
Tue 6/2
1 adult, Economy
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Find cheap flights from Philadelphia to Heathrow with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in September or October, booked 27 days in advance, depart on a Wednesday or Tuesday and return on a Friday

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 April 26, 2026.

This oojo deal was found by Cheapflights users on 4/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:35 pm
PHL
-
LHR
1 stop30h 30m
British Airways
Tue 9/226:15 am
LHR
-
PHL
1 stop16h 25m
British Airways
Deal found 4/22$779
This oojo deal was found by Cheapflights users on 4/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/610:20 pm
PHL
-
LHR
1 stop27h 50m
British Airways
Fri 10/96:15 am
LHR
-
PHL
1 stop16h 35m
British Airways
Deal found 4/22$834
This FlightHub deal was found by Cheapflights users on 4/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/144:05 pm
PHL
-
LHR
2 stops18h 55m
Scandinavian Airlines
Wed 9/236:40 am
LHR
-
PHL
2 stops18h 18m
Scandinavian Airlines
Deal found 4/25$859
This FlightHub deal was found by Cheapflights users on 4/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:05 pm
PHL
-
LHR
2 stops18h 55m
Scandinavian Airlines
Tue 10/276:40 am
LHR
-
PHL
2 stops19h 58m
Scandinavian Airlines
Deal found 4/22$860
This Booking.com deal was found by Cheapflights users on 4/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:25 pm
PHL
-
LHR
1 stop9h 45m
Aer Lingus
Tue 9/2912:00 pm
LHR
-
PHL
1 stop11h 55m
Aer Lingus
Deal found 4/21$865
This Super.com deal was found by Cheapflights users on 4/23. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:00 am
PHL
-
LHR
1 stop19h 30m
JetBlue
Fri 5/88:40 am
LHR
-
PHL
1 stop13h 58m
JetBlue
Deal found 4/23$873
This Booking.com deal was found by Cheapflights users on 4/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/298:25 pm
PHL
-
LHR
1 stop9h 45m
Aer Lingus
Tue 10/131:25 pm
LHR
-
PHL
1 stop10h 30m
Aer Lingus
Deal found 4/23$874
This Booking.com deal was found by Cheapflights users on 4/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:25 pm
PHL
-
LHR
1 stop9h 45m
Aer Lingus
Fri 9/412:00 pm
LHR
-
PHL
1 stop11h 55m
Aer Lingus
Deal found 4/21$875
This FlightHub deal was found by Cheapflights users on 4/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:40 am
PHL
-
LHR
2 stops25h 20m
Scandinavian Airlines
Wed 11/46:40 am
LHR
-
PHL
2 stops21h 16m
Scandinavian Airlines
Deal found 4/23$876
This FlightHub deal was found by Cheapflights users on 4/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/144:05 pm
PHL
-
LHR
2 stops18h 55m
Scandinavian Airlines
Fri 9/256:40 am
LHR
-
PHL
2 stops22h 47m
Scandinavian Airlines
Deal found 4/21$877
This Booking.com deal was found by Cheapflights users on 4/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:45 pm
PHL
-
LHR
Nonstop7h 05m
Multiple Airlines
Tue 9/112:00 pm
LHR
-
PHL
1 stop11h 55m
Multiple Airlines
Deal found 4/25$879
This oojo deal was found by Cheapflights users on 4/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:20 pm
PHL
-
LHR
1 stop28h 30m
British Airways
Mon 9/217:50 am
LHR
-
PHL
1 stop14h 50m
British Airways
Deal found 4/24$880

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 April 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$779
(oojo)

One-way from

$340
(CrystalTravel)

Popular in

June

Cheapest in

September

Average price

$779

Good round-trip deal

$1,067 or less

Good one-way deal

$597 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. 21% potential increase in price ($236 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($42 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 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 April 26, 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
Quickest round-trip

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/14

6:45 pm-6:50 am

Nonstop7h 05m

London Heathrow

Wed 9/23

1:45 pm-4:40 pm

Nonstop7h 55m

$932

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 9/24

2:12 pm-11:20 am

1 stop16h 08m

London Heathrow

Fri 10/2

8:40 am-7:58 pm

2 stops16h 18m

$968

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 8/29

10:45 am-9:20 am

2 stops17h 35m

London Heathrow

Sun 9/13

9:05 pm-7:58 pm

3 stops27h 53m

$1,009

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 10/1

6:45 pm-6:50 am

Nonstop7h 05m

London Heathrow

Sun 10/25

1:10 pm-5:15 pm

Nonstop8h 05m

$1,086

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 9/27

3:25 pm-10:00 pm

3 stops25h 35m

London Heathrow

Sat 10/3

6:00 am-10:32 pm

2 stops21h 32m

$1,153

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 8/8

8:30 am-7:15 am

1 stop17h 45m

London Heathrow

Sat 8/15

6:15 am-4:17 pm

2 stops15h 02m

$1,193

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 5/21

4:20 pm-8:35 am

1 stop11h 15m

London Heathrow

Sun 5/24

12:05 pm-9:33 pm

1 stop14h 28m

$1,272

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 8/8

7:40 pm-7:50 am

Nonstop7h 10m

London Heathrow

Sun 8/16

9:15 am-12:20 pm

Nonstop8h 05m

$1,284

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 7/22

9:30 am-12:55 pm

3 stops22h 25m

London Heathrow

Tue 7/28

6:40 am-10:11 pm

2 stops20h 31m

$1,349

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 8/6

6:17 pm-11:20 am

1 stop12h 03m

London Heathrow

Sun 8/9

8:55 am-7:15 pm

2 stops15h 20m

$1,410

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/25

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 April.
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
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 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 26 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, September is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of $655). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,305). 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 April 26, 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 April 26, 2026.
Peruse reviews from past customers who have flown with Finnair,JetBlue, 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
7.7
Good
1,391 reviews

Food

6.7

Overall

7.7

Comfort

7.4

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Finnair
7.7
Good
1,391 reviews
Finnair
7.7
Good
1,391 reviews

Food

6.7

Overall

7.7

Comfort

7.4

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
JetBlue
7.2
Good
2,963 reviews
Finnair
7.7
Good
1,391 reviews

Food

6.7

Overall

7.7

Comfort

7.4

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
American Airlines
7.1
Good
11,668 reviews
Finnair
7.7
Good
1,391 reviews

Food

6.7

Overall

7.7

Comfort

7.4

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Iberia
7.0
Good
3,199 reviews
Finnair
7.7
Good
1,391 reviews

Food

6.7

Overall

7.7

Comfort

7.4

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
British Airways
6.7
Okay
7,917 reviews
Finnair
7.7
Good
1,391 reviews

Food

6.7

Overall

7.7

Comfort

7.4

Entertainment

6.9

Boarding

7.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space

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 7 different airlines.

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

    British Airways, Delta, and Scandinavian Airlines can get you from Philadelphia to London Heathrow Airport in just under 7h 05m. Your travel time can differ by up to 10h 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 ($501), and Finnair ($513) offers the cheapest pricing from Philadelphia to London Heathrow Airport. You may be able to fly from Philadelphia to London Heathrow Airport for 43% 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 Iberia, 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 Iberia (93%), Malaysia Airlines (93%) or American Airlines (90%) 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 $2,288, our data indicates the cheapest price to be $344. The most popular route (Philadelphia - London Heathrow), is priced around $779.

  • 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, September is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of $655). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,305). 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
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Borehamwood
Broadway
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from Philadelphia to Heathrow

Discover the top 7 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 April 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$484Average$748FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$501Average$743FlexibilityNo cancel feeOn-time70%
FinnairCheapest$513Average$864FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$515Average$852FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$560Average$1,276FlexibilityNo cancel feeOn-time69%
IberiaCheapest$572Average$855FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$627Average$718FlexibilityNo cancel feeOn-time62%

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