Heathrow

$329+ 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
Jun 21 — Jun 281
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Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in October or January, booked 56 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap 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 16, 2025.

Round-trip from

$638
(Iberia)

One-way from

$330
(Mytrip)

Popular in

June

Cheapest in

October

Average price

$1,252

Good round-trip deal

$668 or less

Good one-way deal

$505 or less
From Philadelphia to London Heathrow
One-way flight from Philadelphia to London Heathrow
Highest demand for flights based on searches. 19% potential increase in price ($200 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Average for round-trip flights in June 2025
Price to beat on a round-trip flight from Philadelphia to London Heathrow.
Price to beat on a one-way flight from Philadelphia to London Heathrow.

Find 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 16, 2025.

This Iberia deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/36:35 pmPHL - LHR
Nonstop7h 05mIberia
Tue 8/1910:05 amLHR - PHL
Nonstop8h 05mIberia
Deal found 6/14$638
This Gurufare deal was found by Cheapflights users on 6/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:30 pmPHL - LHR
Nonstop7h 10mBritish Airways
Mon 9/158:20 pmLHR - PHL
1 stop24h 30mBritish Airways
Deal found 6/15$639
This United Airlines deal was found by Cheapflights users on 6/16. 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 8/2510:30 amPHL - LHR
1 stop15h 25mUnited Airlines
Mon 9/1510:50 amLHR - PHL
2 stops40h 39mUnited Airlines
Deal found 6/16$643
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:25 pmPHL - LHR
1 stop14h 05mDelta
Wed 8/276:15 amLHR - PHL
2 stops16h 49mDelta
Deal found 6/14$644
This JetBlue deal was found by Cheapflights users on 6/15. 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.
Thu 9/253:10 pmPHL - LHR
1 stop10h 20mJetBlue
Tue 9/308:25 amLHR - PHL
1 stop14h 20mJetBlue
Deal found 6/15$647
This Lufthansa deal was found by Cheapflights users on 6/16. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/114:50 pmPHL - LHR
1 stop32h 45mLufthansa
Mon 10/203:30 pmLHR - PHL
1 stop29h 30mLufthansa
Deal found 6/16$651
This Finnair deal was found by Cheapflights users on 6/15. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2010:25 pmPHL - LHR
Nonstop7h 05mFinnair
Tue 7/299:20 pmLHR - PHL
1 stop21h 30mFinnair
Deal found 6/15$656
This Air Canada deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/173:25 pmPHL - LHR
2 stops12h 10mAir Canada
Wed 9/246:50 amLHR - PHL
2 stops12h 48mAir Canada
Deal found 6/14$657
This Gotogate deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/77:30 amPHL - LHR
2 stops18h 00mMultiple Airlines
Wed 9/106:50 amLHR - PHL
2 stops12h 48mMultiple Airlines
Deal found 6/14$658
This American Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/76:30 pmPHL - LHR
Nonstop7h 10mAmerican Airlines
Sun 9/147:55 amLHR - PHL
1 stop13h 00mAmerican Airlines
Deal found 6/14$667
This Orbitz deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/288:30 pmPHL - LHR
1 stop9h 40mAer Lingus
Tue 9/212:00 pmLHR - PHL
1 stop12h 00mAer Lingus
Deal found 6/14$691
This Kiwi.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/206:27 pmPHL - LHR
1 stop11h 43mAir France
Tue 7/2912:25 pmLHR - PHL
2 stops15h 43mAir France
Deal found 6/14$710

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 16, 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

Sun 8/3

6:35 pm-6:40 am

Nonstop7h 05m

London Heathrow

Tue 8/19

10:05 am-1:10 pm

Nonstop8h 05m

$638

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 9/10

6:30 pm-6:40 am

Nonstop7h 10m

London Heathrow

Mon 9/15

8:20 pm-3:50 pm

1 stop24h 30m

$639

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 8/25

10:30 am-6:55 am

1 stop15h 25m

London Heathrow

Mon 9/15

10:50 am-10:29 pm

2 stops40h 39m

$643

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 8/20

6:25 pm-1:30 pm

1 stop14h 05m

London Heathrow

Wed 8/27

6:15 am-6:04 pm

2 stops16h 49m

$644

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 9/25

3:10 pm-6:30 am

1 stop10h 20m

London Heathrow

Tue 9/30

8:25 am-5:45 pm

1 stop14h 20m

$647

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 10/11

4:50 pm-6:35 am

1 stop32h 45m

London Heathrow

Mon 10/20

3:30 pm-4:00 pm

1 stop29h 30m

$651

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 7/20

10:25 pm-10:30 am

Nonstop7h 05m

London Heathrow

Tue 7/29

9:20 pm-1:50 pm

1 stop21h 30m

$656

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 9/17

3:25 pm-8:35 am

2 stops12h 10m

London Heathrow

Wed 9/24

6:50 am-2:38 pm

2 stops12h 48m

$657

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 8/7

7:30 am-6:30 am

2 stops18h 00m

London Heathrow

Wed 9/10

6:50 am-2:38 pm

2 stops12h 48m

$658

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 9/7

6:30 pm-6:40 am

Nonstop7h 10m

London Heathrow

Sun 9/14

7:55 am-3:55 pm

1 stop13h 00m

$667

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/13

Showing 1-10 of 28 results
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The best insider tips for Philadelphia to London Heathrow Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your 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

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 June 13, 2025.

Booking 56 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, November is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of $661). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,108). 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 16, 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 10% on your trip compared to booking a flight in the afternoon.

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 Friday 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.

Weekly flight availability from Philadelphia to London Heathrow Airport

Explore weekly flight availability from Philadelphia to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 16, 2025.

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

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 16, 2025.
Get a feel of what it's like to fly with Delta, KLM and Finnair from Philadelphia to London by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good
8.0
Very good

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection 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 7 different airlines.

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

    According to our current data, Iberia ($638), British Airways ($639), and United Airlines ($643) offers the cheapest pricing from Philadelphia to London Heathrow Airport. You may be able to fly from Philadelphia to London Heathrow Airport for 24% 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 Air Canada, with whom users have recently found tickets for as low as $372. However, be on the lookout for offers from JetBlue and British Airways, 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 Aer Lingus (87%), American Airlines (86%) or Finnair (86%) 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 $1,965, our data indicates the cheapest price to be $414. The most popular route (Philadelphia - London Heathrow), is priced around $582.

  • 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, November is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of $661). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,108). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Folkestone
Borehamwood
Broadway
Sutton
Aylesbury
Chelmsford
Brentwood

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.

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 June 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$547Average$668FlexibilityNo cancel feeOn-time62%
Aer LingusCheapest$587Average$813FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$611Average$780FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$625Average$819FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$627Average$863FlexibilityNo cancel feeOn-time71%
FinnairCheapest$638Average$792FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$673Average$936FlexibilityNo cancel feeOn-time69%

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