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Cheap flights from Philadelphia to London Heathrow Airport from £192

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 16/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in September or October, booked 14 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 16 January 2026.

Round-trip from

£441

One-way from

£192

Popular in

June

Cheapest in

September

Average price

£540

Good round-trip deal

£527 or less

Good one-way deal

£416 or less
British Airways
  • British Airways
  • 4/5-11/5
  • 1 total stop
  • 33h 45m total
  • Philadelphia to London
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16/3
  • 16/3
  • 2 total stops
  • 39h 42m total
  • Philadelphia to London
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Highest demand for flights based on searches. 16% potential increase in price (£92 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Philadelphia to London Heathrow.
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Price to beat on a one-way flight from Philadelphia to London Heathrow.
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Find flight deals from Philadelphia to Heathrow

Enter your travel dates to find the best prices.

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 16 January 2026.

Tue 3/215:30
PHL
-
LHR
2 stops24h 05m
Air Canada
Tue 10/206:50
LHR
-
PHL
2 stops12h 57m
Air Canada
Deal found 15/1£441
Mon 4/518:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Mon 11/521:10
LHR
-
PHL
1 stop23h 45m
British Airways
Deal found 15/1£441
Wed 1/413:38
PHL
-
LHR
1 stop13h 02m
British Airways
Tue 7/421:10
LHR
-
PHL
1 stop22h 45m
British Airways
Deal found 14/1£442
Mon 2/219:50
PHL
-
LHR
Nonstop7h 00m
British Airways
Wed 25/210:15
LHR
-
PHL
Nonstop8h 00m
British Airways
Deal found 14/1£443
Tue 24/216:05
PHL
-
LHR
1 stop14h 15m
Multiple Airlines
Mon 2/313:45
LHR
-
PHL
2 stops36h 24m
Multiple Airlines
Deal found 15/1£444
Wed 18/207:35
PHL
-
LHR
2 stops20h 45m
Air Canada
Tue 3/306:50
LHR
-
PHL
2 stops12h 57m
Air Canada
Deal found 14/1£444
Wed 21/115:30
PHL
-
LHR
1 stop10h 40m
Air Canada
Tue 27/106:50
LHR
-
PHL
2 stops12h 57m
Air Canada
Deal found 14/1£445
Wed 23/918:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Mon 28/915:00
LHR
-
PHL
1 stop29h 30m
British Airways
Deal found 15/1£446
Wed 25/215:30
PHL
-
LHR
2 stops14h 50m
Multiple Airlines
Wed 4/306:50
LHR
-
PHL
2 stops12h 57m
Multiple Airlines
Deal found 14/1£447
Tue 21/419:50
PHL
-
LHR
Nonstop7h 00m
Finnair
Thu 14/513:45
LHR
-
PHL
Nonstop7h 55m
Finnair
Deal found 15/1£447
Wed 4/315:30
PHL
-
LHR
1 stop10h 40m
Air Canada
Fri 20/313:25
LHR
-
PHL
1 stop29h 22m
Air Canada
Deal found 15/1£448
Tue 3/318:16
PHL
-
LHR
1 stop12h 24m
Delta
Tue 10/311:30
LHR
-
PHL
2 stops17h 27m
Delta
Deal found 14/1£449

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 16 January 2026.
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

Mon 2/2

19:50-07:50

Nonstop7h 00m

London Heathrow

Thu 12/2

10:15-13:15

Nonstop8h 00m

£443

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 5/2

19:50-07:50

Nonstop7h 00m

London Heathrow

Wed 11/2

07:50-14:05

1 stop11h 15m

£458

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 5/2

19:50-07:50

Nonstop7h 00m

London Heathrow

Tue 10/2

07:50-14:05

1 stop11h 15m

£458

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 3/2

15:40-09:15

1 stop12h 35m

London Heathrow

Sun 8/2

07:50-14:05

1 stop11h 15m

£462

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 15/2

19:17-12:00

1 stop11h 43m

London Heathrow

Sat 21/2

16:20-13:55

1 stop26h 35m

£467

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 13/2

15:05-10:50

1 stop14h 45m

London Heathrow

Fri 20/2

15:00-17:14

2 stops31h 14m

£477

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 2/2

19:50-07:50

Nonstop7h 00m

London Heathrow

Sun 8/2

10:15-13:30

Nonstop8h 15m

£480

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 5/2

19:50-07:50

Nonstop7h 00m

London Heathrow

Thu 12/2

13:10-16:15

Nonstop8h 05m

£480

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 3/4

15:30-10:00

1 stop13h 30m

London Heathrow

Fri 10/4

14:05-14:16

2 stops29h 11m

£488

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 6/2

13:30-06:55

1 stop12h 25m

London Heathrow

Tue 10/2

09:20-18:23

1 stop14h 03m

£489

Flights are sorted by cheapest return flights first.

Deals found on 15/1

Showing 1-10 of 19 results
1
2

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 return 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 return flight from Philadelphia to Heathrow. Price data was last updated on 9 January 2026.

The best time to book flights from Philadelphia to London Heathrow Airport is 14 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 £292). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £430). 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 16 January 2026.

When flying from Philadelphia to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 16 January 2026.
Get a feel of what it's like to fly with American Airlines, Aer Lingus, andJetBlue from Philadelphia to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,135 reviews
Check prices

Crew

8.0

Entertainment

6.9

Food

6.4

Overall

7.2

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,135 reviews
American Airlines
7.2
Good
11,135 reviews
Check prices

Crew

8.0

Entertainment

6.9

Food

6.4

Overall

7.2

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
Aer Lingus
7.2
Good
1,435 reviews
American Airlines
7.2
Good
11,135 reviews
Check prices

Crew

8.0

Entertainment

6.9

Food

6.4

Overall

7.2

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
JetBlue
7.2
Good
2,887 reviews
American Airlines
7.2
Good
11,135 reviews
Check prices

Crew

8.0

Entertainment

6.9

Food

6.4

Overall

7.2

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
British Airways
6.7
Okay
7,680 reviews
American Airlines
7.2
Good
11,135 reviews
Check prices

Crew

8.0

Entertainment

6.9

Food

6.4

Overall

7.2

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

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?

    Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to London Heathrow. You should not have trouble finding flights to London Heathrow from Philadelphia; the airport handles an average of 10 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.

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

    For as low as £443, British Airways can have you in London Heathrow Airport from Philadelphia in 7h. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. Most flights are nonstop.

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

    Our cheapest airline available from Philadelphia to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £384 on this airline. Additional options worth looking into are Aer Lingus and JetBlue, starting at £392 and £427 round-trip. Users have found that British Airways is 37% cheaper than the other options available to this destination.

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

    Consider Aer Lingus (93%), American Airlines (88%) or Finnair (88%) 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?

    The cheapest flight price from Philadelphia to London Heathrow Airport is £179. On average you can expect to pay £1,023. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £415.

  • 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 holiday 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 £292). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £430). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Northampton
Slough
Gatwick
Hounslow
Wembley
Ilford
Brentford
Hayes
Colchester
Watford
Crawley
Kingston upon Thames
Swindon
Bedford
Chelmsford
Eastbourne
Romford

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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 4 airlines flying from Philadelphia to Heathrow

Discover the top 4 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 858,174 searches. Data last updated 16 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£384Average£555FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£392Average£529FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£427Average£516FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
American AirlinesCheapest£510Average£665FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Philadelphia to Heathrow?

Cheapflights makes it easy to find Philadelphia to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Philadelphia to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Philadelphia to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Philadelphia? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Philadelphia to Heathrow become cheaper?

Yes! Start tracking prices for Philadelphia to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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