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$250+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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 September or October, booked 9 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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 December 12, 2025.

This JetBlue deal was found by Cheapflights users on 12/9. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/104:32 pmPHL - LHR
1 stop9h 23mJetBlue
Sun 2/89:20 amLHR - PHL
1 stop14h 03mJetBlue
Deal found 12/9$629
This JetBlue deal was found by Cheapflights users on 12/10. 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 12/134:42 pmPHL - LHR
1 stop9h 13mJetBlue
Tue 1/279:20 amLHR - PHL
1 stop14h 03mJetBlue
Deal found 12/10$668
This Air Canada deal was found by Cheapflights users on 12/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/154:35 pmPHL - LHR
1 stop13h 45mAir Canada
Fri 1/91:25 pmLHR - PHL
1 stop30h 22mAir Canada
Deal found 12/8$683
This Air Canada deal was found by Cheapflights users on 12/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/154:35 pmPHL - LHR
1 stop13h 45mAir Canada
Thu 12/251:25 pmLHR - PHL
1 stop30h 25mAir Canada
Deal found 12/8$685
This United Airlines deal was found by Cheapflights users on 12/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/167:50 amPHL - LHR
1 stop17h 40mUnited Airlines
Fri 1/911:10 amLHR - PHL
1 stop16h 36mUnited Airlines
Deal found 12/8$687
This United Airlines deal was found by Cheapflights users on 12/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/156:30 amPHL - LHR
2 stops19h 00mUnited Airlines
Fri 1/98:00 amLHR - PHL
2 stops18h 36mUnited Airlines
Deal found 12/8$699
This Air Canada deal was found by Cheapflights users on 12/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/303:30 pmPHL - LHR
1 stop10h 40mAir Canada
Thu 1/296:50 amLHR - PHL
2 stops12h 57mAir Canada
Deal found 12/9$700
This Air Canada deal was found by Cheapflights users on 12/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:50 amPHL - LHR
2 stops20h 30mAir Canada
Thu 1/296:50 amLHR - PHL
2 stops12h 57mAir Canada
Deal found 12/9$704
This Air Canada deal was found by Cheapflights users on 12/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:50 amPHL - LHR
2 stops18h 20mAir Canada
Tue 2/36:50 amLHR - PHL
2 stops12h 57mAir Canada
Deal found 12/9$707

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$608
(Scandinavian Airlines)

One-way from

$250
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$1,064

Good round-trip deal

$726 or less

Good one-way deal

$448 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. 18% potential increase in price ($184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 2025.
Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.

Fly from

Philadelphia

Fly to

Heathrow

Route

Depart

Return

Price

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 1/23

6:02 am-12:55 pm

3 stops25h 53m

London Heathrow

Tue 1/27

6:40 am-9:16 pm

2 stops19h 36m

$608

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 1/12

6:02 am-9:20 am

2 stops22h 18m

London Heathrow

Tue 1/20

6:40 am-9:16 pm

3 stops19h 36m

$629

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 3/3

11:08 am-5:40 pm

2 stops25h 32m

London Heathrow

Sat 3/7

6:40 am-12:26 am

2 stops22h 46m

$631

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 1/17

12:11 pm-5:40 pm

2 stops24h 29m

London Heathrow

Sat 1/24

6:40 am-12:21 am

2 stops22h 41m

$631

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 3/10

11:16 am-6:30 pm

2 stops27h 14m

London Heathrow

Thu 3/19

7:05 am-10:54 pm

3 stops19h 49m

$634

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 3/3

6:00 am-4:00 pm

2 stops29h 00m

London Heathrow

Tue 3/10

7:05 am-9:23 pm

3 stops18h 18m

$634

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 3/11

3:02 pm-6:55 am

1 stop11h 53m

London Heathrow

Wed 3/25

9:20 am-9:47 pm

1 stop16h 27m

$638

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 3/10

3:02 pm-6:55 am

1 stop11h 53m

London Heathrow

Sat 3/14

9:20 am-9:47 pm

1 stop16h 27m

$638

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 2/5

1:30 pm-6:55 am

1 stop12h 25m

London Heathrow

Mon 2/9

9:20 am-6:23 pm

1 stop14h 03m

$638

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 3/3

3:02 pm-6:55 am

1 stop10h 53m

London Heathrow

Tue 3/10

9:20 am-10:45 pm

1 stop17h 25m

$638

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 20 results
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
GurufarePrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
Justfly.comPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Philadelphia-London Heathrow Airport flight deals on Cheapflights vs. eDreams >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 Gurufare the most. Gurufare 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?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Heathrow. Price data was last updated on December 5, 2025.

Booking 9 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 $390). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $577). 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 December 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Philadelphia to London Heathrow Airport at noon. If you’re flexible enough to do this you can expect to save up to 7% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from Philadelphia to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Philadelphia to London Heathrow Airport flight should consider departing on Tuesday at noon when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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
Airports
PHL

For convenient parking, choose facilities across from your terminal. Long-term and economy lots are cheaper, accessible via free shuttle.

Read more about PHLBy Mark Chesnut
LHR

Take the Heathrow Express for the fastest trip to central London, arriving at Paddington Station for easy onward travel.

Read more about LHRBy Ramsey Qubein
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

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 December 12, 2025.
Peruse reviews from past customers who have flown with Finnair, American Airlines, and Aer Lingus 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
1,334 reviews

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
Finnair
7.6
Good
1,334 reviews
Finnair
7.6
Good
1,334 reviews

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
American Airlines
7.2
Good
11,050 reviews
Finnair
7.6
Good
1,334 reviews

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
Aer Lingus
7.2
Good
1,394 reviews
Finnair
7.6
Good
1,334 reviews

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
Iberia
7.0
Good
3,045 reviews
Finnair
7.6
Good
1,334 reviews

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
British Airways
6.7
Okay
7,571 reviews
Finnair
7.6
Good
1,334 reviews

Entertainment

6.9

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.

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 10 daily outbound flights to London Heathrow from 7 different airlines.

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

    Scandinavian Airlines can get you from Philadelphia to London Heathrow Airport in just under 25h 53m. Your travel time can differ by up to . Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi.

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

    According to our current data, JetBlue ($503), American Airlines ($505), and British Airways ($508) offers the cheapest pricing from Philadelphia to London Heathrow Airport. You may be able to fly from Philadelphia to London Heathrow Airport for 38% 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 Aer Lingus, 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 Finnair (85%), Malaysia Airlines (85%) or American Airlines (84%) 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 $2,057, our data indicates the cheapest price to be $366. The most popular route (Philadelphia - London Heathrow), is priced around $553.

  • 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 $390). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $577). 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
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Wembley

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Philadelphia to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$503Average$658FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$505Average$834FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$508Average$752FlexibilityNo cancel feeOn-time70%
FinnairCheapest$514Average$778FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$522Average$792FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$560Average$936FlexibilityNo cancel feeOn-time69%
IberiaCheapest$578Average$785FlexibilityNo cancel feeOn-time77%

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