HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$282+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
Jul 9 — Jul 161
Thu 7/9
Thu 7/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in September or February, booked 10 days in advance, depart on a Wednesday or Tuesday 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 June 9, 2026.

This The Travel House deal was found by Cheapflights users on 6/8. 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.
Wed 8/59:28 am
PHL
-
LHR
1 stop16h 02m
JetBlue
Sun 8/238:40 am
LHR
-
PHL
1 stop28h 42m
JetBlue
Deal found 6/8$864
This Expedia deal was found by Cheapflights users on 6/8. 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.
Mon 11/27:50 pm
PHL
-
LHR
Nonstop7h 00m
Multiple Airlines
Sun 11/89:20 am
LHR
-
PHL
1 stop13h 12m
Multiple Airlines
Deal found 6/8$865
This Mytrip deal was found by Cheapflights users on 6/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:50 am
PHL
-
LHR
3 stops19h 20m
Multiple Airlines
Sun 8/3010:00 pm
LHR
-
PHL
2 stops21h 49m
Multiple Airlines
Deal found 6/6$868
This Orbitz deal was found by Cheapflights users on 6/7. 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 7/38:55 pm
PHL
-
LHR
1 stop28h 35m
JetBlue
Tue 7/78:40 am
LHR
-
PHL
1 stop16h 25m
JetBlue
Deal found 6/7$869
This Priceline deal was found by Cheapflights users on 6/5. 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.
Fri 9/410:15 pm
PHL
-
LHR
Nonstop7h 05m
Multiple Airlines
Mon 9/78:40 am
LHR
-
PHL
1 stop27h 58m
Multiple Airlines
Deal found 6/5$870
This oojo deal was found by Cheapflights users on 6/9. 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 10/103:20 pm
PHL
-
LHR
1 stop11h 30m
British Airways
Mon 10/127:50 am
LHR
-
PHL
1 stop15h 00m
British Airways
Deal found 6/9$872
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:25 pm
PHL
-
LHR
1 stop9h 45m
Multiple Airlines
Tue 9/228:45 am
LHR
-
PHL
2 stops15h 10m
Multiple Airlines
Deal found 6/7$873
This Orbitz deal was found by Cheapflights users on 6/8. 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.
Sat 8/228:55 pm
PHL
-
LHR
1 stop28h 35m
JetBlue
Sun 8/308:40 am
LHR
-
PHL
1 stop27h 58m
JetBlue
Deal found 6/8$874
This FlightHub deal was found by Cheapflights users on 6/8. 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.
Tue 11/31:20 pm
PHL
-
LHR
2 stops27h 20m
Scandinavian Airlines
Sun 11/86:40 am
LHR
-
PHL
2 stops23h 11m
Scandinavian Airlines
Deal found 6/8$875
This Mytrip deal was found by Cheapflights users on 6/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/138:25 pm
PHL
-
LHR
1 stop13h 35m
Aer Lingus
Mon 8/171:25 pm
LHR
-
PHL
1 stop10h 30m
Aer Lingus
Deal found 6/6$876
This Cheapflightsfares deal was found by Cheapflights users on 6/8. 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.
Tue 10/61:20 pm
PHL
-
LHR
2 stops15h 00m
Scandinavian Airlines
Tue 10/206:40 am
LHR
-
PHL
2 stops18h 27m
Scandinavian Airlines
Deal found 6/8$878

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 June 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$864
(The Travel House)

One-way from

$282
(Ovago)

Popular in

June

Cheapest in

September

Average price

$1,447

Good round-trip deal

$1,076 or less

Good one-way deal

$436 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. 26% potential increase in price ($327 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 June 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 June 9, 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

Thu 12/3

1:20 pm-2:35 pm

3 stops20h 15m

London Heathrow

Mon 12/7

6:40 am-12:51 am

2 stops23h 11m

$914
Quickest round-trip

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 10/26

7:35 pm-6:35 am

Nonstop7h 00m

London Heathrow

Tue 11/3

1:10 pm-4:15 pm

Nonstop8h 05m

$931

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 11/17

8:25 am-6:25 am

1 stop17h 00m

London Heathrow

Sun 11/22

6:30 am-5:19 pm

2 stops15h 49m

$967

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 10/8

12:09 pm-6:25 am

1 stop13h 16m

London Heathrow

Wed 10/14

9:55 am-10:38 pm

2 stops17h 43m

$967

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 9/20

3:25 pm-6:30 am

1 stop10h 05m

London Heathrow

Mon 9/28

8:40 am-6:04 pm

1 stop14h 24m

$973

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 10/25

7:35 pm-6:35 am

Nonstop7h 00m

London Heathrow

Mon 11/2

1:10 pm-4:15 pm

Nonstop8h 05m

$981

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 11/24

9:42 am-7:05 am

2 stops16h 23m

London Heathrow

Sun 11/29

12:30 pm-12:21 am

1 stop16h 51m

$1,053

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 8/10

5:40 pm-1:00 pm

2 stops14h 20m

London Heathrow

Mon 8/17

6:40 pm-4:05 pm

2 stops26h 25m

$1,093

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 11/27

6:00 am-2:35 pm

3 stops27h 35m

London Heathrow

Mon 11/30

7:50 pm-8:34 pm

3 stops29h 44m

$1,108

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/14

3:25 pm-5:45 pm

3 stops21h 20m

London Heathrow

Fri 9/18

8:00 am-9:50 am

2 stops30h 50m

$1,145

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/4

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 June.
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 66 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 $659). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,343). 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 June 9, 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 June 9, 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
7.7
Good
1,405 reviews

Overall

7.7

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
Finnair
7.7
Good
1,405 reviews
Finnair
7.7
Good
1,405 reviews

Overall

7.7

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
Aer Lingus
7.3
Good
1,599 reviews
Finnair
7.7
Good
1,405 reviews

Overall

7.7

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
American Airlines
7.1
Good
11,643 reviews
Finnair
7.7
Good
1,405 reviews

Overall

7.7

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
Iberia
7.0
Good
3,230 reviews
Finnair
7.7
Good
1,405 reviews

Overall

7.7

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.
British Airways
6.7
Okay
8,031 reviews
Finnair
7.7
Good
1,405 reviews

Overall

7.7

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.4

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

LAX - HEL

All crew members are really nice behavior. Devdutt also nice person.

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?

    Scandinavian Airlines, Delta, and British Airways can get you from Philadelphia to London Heathrow Airport in just under 7h. Your travel time can differ by up to 13h 15m. 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 ($498), 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 45% 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 (95%), American Airlines (91%) or Finnair (91%) 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 $1,684, our data indicates the cheapest price to be $350. The most popular route (Philadelphia - London Heathrow), is priced around $818.

  • 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 $659). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,343). 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
Southend-on-Sea
Wembley
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough

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 June 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$484Average$787FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$498Average$760FlexibilityNo cancel feeOn-time70%
FinnairCheapest$513Average$877FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$513Average$885FlexibilityNo cancel feeOn-time71%
IberiaCheapest$559Average$926FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$638Average$744FlexibilityNo cancel feeOn-time62%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.