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Cheap flights from Philadelphia to London Heathrow Airport from £185

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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
21 Feb — 28 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

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 22 January 2026.

Wed 11/210:10
PHL
-
LHR
2 stops18h 10m
United Airlines
Tue 17/213:25
LHR
-
PHL
2 stops32h 49m
United Airlines
Deal found 20/1£438
Wed 11/316:43
PHL
-
LHR
1 stop10h 17m
British Airways
Tue 17/313:10
LHR
-
PHL
Nonstop8h 05m
British Airways
Deal found 21/1£439
Sat 11/422:00
PHL
-
LHR
1 stop29h 00m
British Airways
Thu 23/408:15
LHR
-
PHL
1 stop15h 40m
British Airways
Deal found 20/1£439
Tue 31/322:10
PHL
-
LHR
Nonstop7h 10m
British Airways
Tue 7/416:50
LHR
-
PHL
1 stop27h 05m
British Airways
Deal found 20/1£440
Wed 11/207:50
PHL
-
LHR
1 stop19h 40m
Air Canada
Tue 17/209:00
LHR
-
PHL
2 stops18h 46m
Air Canada
Deal found 20/1£441
Mon 2/219:50
PHL
-
LHR
Nonstop7h 00m
British Airways
Wed 11/210:15
LHR
-
PHL
Nonstop8h 15m
British Airways
Deal found 20/1£441
Tue 24/216:05
PHL
-
LHR
1 stop14h 15m
Multiple Airlines
Mon 2/313:45
LHR
-
PHL
2 stops36h 24m
Multiple Airlines
Deal found 20/1£442
Sun 1/219:50
PHL
-
LHR
Nonstop7h 00m
British Airways
Tue 10/210:15
LHR
-
PHL
Nonstop8h 15m
British Airways
Deal found 20/1£443
Tue 3/315:30
PHL
-
LHR
2 stops14h 50m
Multiple Airlines
Tue 10/309:00
LHR
-
PHL
2 stops17h 46m
Multiple Airlines
Deal found 22/1£444
Sun 1/219:50
PHL
-
LHR
Nonstop7h 00m
American Airlines
Tue 10/210:15
LHR
-
PHL
Nonstop8h 15m
American Airlines
Deal found 21/1£444
Wed 4/207:50
PHL
-
LHR
2 stops18h 20m
Air Canada
Wed 25/206:50
LHR
-
PHL
2 stops12h 57m
Air Canada
Deal found 21/1£445
Tue 28/415:30
PHL
-
LHR
1 stop10h 00m
Air Canada
Thu 7/508:40
LHR
-
PHL
2 stops17h 53m
Air Canada
Deal found 19/1£446

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 22 January 2026.

Round-trip from

£438

One-way from

£185

Popular in

June

Cheapest in

September

Average price

£537

Good round-trip deal

£526 or less

Good one-way deal

£416 or less
United Airlines
  • United Airlines
  • 11/2-17/2
  • 4 total stops
  • 50h 59m total
  • Philadelphia to London
Search Deals
3/2
  • 3/2
  • 2 total stops
  • 18h 27m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£95 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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

 
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 22 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

Tue 31/3

16:02-08:00

1 stop10h 58m

London Heathrow

Tue 7/4

21:10-14:55

1 stop22h 45m

£444

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/3

19:35-06:35

Nonstop7h 00m

London Heathrow

Thu 2/4

13:45-16:40

Nonstop7h 55m

£453

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 11/3

16:43-07:00

1 stop10h 17m

London Heathrow

Wed 1/4

09:15-12:05

Nonstop7h 50m

£457

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 9/3

18:45-12:05

1 stop13h 20m

London Heathrow

Wed 1/4

09:15-12:05

Nonstop7h 50m

£457

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 15/4

15:30-10:00

1 stop13h 30m

London Heathrow

Thu 30/4

07:25-22:44

2 stops20h 19m

£459

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 30/3

22:10-10:20

Nonstop7h 10m

London Heathrow

Fri 10/4

15:40-00:43

1 stop14h 03m

£462

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 24/2

15:02-06:55

1 stop10h 53m

London Heathrow

Sat 28/2

09:20-22:36

1 stop18h 16m

£476

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 2/2

19:50-07:50

Nonstop7h 00m

London Heathrow

Mon 9/2

10:15-13:30

Nonstop8h 15m

£479

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 22/2

18:35-06:35

Nonstop7h 00m

London Heathrow

Sat 7/3

13:10-16:15

Nonstop8h 05m

£479

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 25/2

18:35-06:35

Nonstop7h 00m

London Heathrow

Sun 1/3

13:10-16:15

Nonstop8h 05m

£479

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 21 results
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2
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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 16 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 22 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 22 January 2026.
Get a feel of what it's like to fly with American Airlines, JetBlue, andAer Lingus 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
11,173 reviews
Check prices

Food

6.4

Comfort

7.2

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

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
11,173 reviews
American Airlines
7.2
Good
11,173 reviews
Check prices

Food

6.4

Comfort

7.2

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

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
2,889 reviews
American Airlines
7.2
Good
11,173 reviews
Check prices

Food

6.4

Comfort

7.2

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

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
1,439 reviews
American Airlines
7.2
Good
11,173 reviews
Check prices

Food

6.4

Comfort

7.2

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

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
7,689 reviews
American Airlines
7.2
Good
11,173 reviews
Check prices

Food

6.4

Comfort

7.2

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

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 £444, British Airways can have you in London Heathrow Airport from Philadelphia in 10h 58m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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 £391 and £426 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 (87%), American Airlines (84%) or Finnair (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?

    The cheapest flight price from Philadelphia to London Heathrow Airport is £179. On average you can expect to pay £593. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £413.

  • 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
Luton
Croydon
Northampton
Wembley
Gatwick
Slough
Hounslow
Ilford
Brentford
Hayes
Colchester
Watford
Swindon
Crawley
Bedford
Kingston upon Thames
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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£384Average£554FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£391Average£529FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
JetBlueCheapest£426Average£515FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
American AirlinesCheapest£509Average£664FlexibilityNo 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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