Cheap flights from Philadelphia to London Heathrow Airport from £286

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 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
23 Jul — 30 Jul1
1 adult

Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in September or October, booked 56 days in advance, depart on a Tuesday or Friday 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 18 July 2025.

Round-trip from

£422

One-way from

£286

Popular in

June

Cheapest in

September

Average price

£724

Good round-trip deal

£501 or less

Good one-way deal

£377 or less
British Airways
  • British Airways
  • 14/8-23/9
  • Nonstop
  • 15h 00m total
  • Philadelphia to London
17/10
  • 17/10
  • 2 total stops
  • 23h 02m total
  • Philadelphia to London
Highest demand for flights based on searches. 18% potential increase in price (£102 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Average for round-trip flights in July 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 18 July 2025.

Thu 14/818:35PHL - LHR
Nonstop7h 05mBritish Airways
Tue 23/913:30LHR - PHL
Nonstop7h 55mBritish Airways
Deal found 18/7£422
Thu 14/813:40PHL - LHR
1 stop13h 10mIberia
Wed 27/810:05LHR - PHL
Nonstop8h 05mIberia
Deal found 17/7£425
Mon 25/807:30PHL - LHR
2 stops18h 00mAir Canada
Sun 31/809:30LHR - PHL
1 stop17h 37mAir Canada
Deal found 18/7£427
Sun 17/819:26PHL - LHR
1 stop30h 19mDelta
Mon 25/811:30LHR - PHL
2 stops18h 26mDelta
Deal found 16/7£427
Fri 8/809:20PHL - LHR
1 stop16h 10mUnited Airlines
Fri 15/808:30LHR - PHL
1 stop18h 05mUnited Airlines
Deal found 17/7£430
Sat 6/919:50PHL - LHR
Nonstop7h 15mAmerican Airlines
Sat 13/907:35LHR - PHL
1 stop13h 20mAmerican Airlines
Deal found 18/7£444
Sat 13/915:25PHL - LHR
2 stops24h 35mMultiple Airlines
Thu 25/906:50LHR - PHL
2 stops12h 48mMultiple Airlines
Deal found 18/7£448
Sun 31/820:30PHL - LHR
1 stop11h 55mAer Lingus
Sat 6/909:50LHR - PHL
1 stop14h 10mAer Lingus
Deal found 17/7£458

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 18 July 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

Thu 14/8

18:35-06:40

Nonstop7h 05m

London Heathrow

Tue 23/9

13:30-16:25

Nonstop7h 55m

£422

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 14/8

13:40-07:50

1 stop13h 10m

London Heathrow

Wed 27/8

10:05-13:10

Nonstop8h 05m

£425

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 25/8

07:30-06:30

2 stops18h 00m

London Heathrow

Sun 31/8

09:30-14:37

1 stop10h 07m

£427

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 17/8

19:26-06:45

1 stop30h 19m

London Heathrow

Mon 25/8

11:30-00:56

2 stops18h 26m

£427

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 8/8

09:20-06:30

1 stop16h 10m

London Heathrow

Fri 15/8

08:30-21:35

1 stop18h 05m

£430

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sat 13/9

12:47-08:05

2 stops14h 18m

London Heathrow

Tue 23/9

11:45-21:34

2 stops14h 49m

£432

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 25/9

19:50-08:05

Nonstop7h 15m

London Heathrow

Sun 5/10

07:55-15:55

1 stop13h 00m

£444

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 31/8

20:30-13:25

1 stop11h 55m

London Heathrow

Sat 6/9

09:50-19:00

1 stop14h 10m

£458

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Fri 17/10

16:03-20:05

2 stops23h 02m

£286

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Mon 4/8

09:20-10:00

1 stop19h 40m

£294

Flights are sorted by cheapest return flights first.

Deals found on 16/7

Showing 1-10 of 18 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 11 July 2025.

The best time to book flights from Philadelphia to London Heathrow Airport is 56 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, January is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £112). Flying from Philadelphia to London Heathrow Airport in August is currently the most expensive (average of £164). 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 18 July 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 19% on flights from Philadelphia to London Heathrow Airport by exploring options for tickets at midday.

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 18 July 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).

How much does it cost for a return flight from Philadelphia to London Heathrow Airport?

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 18 July 2025.
Get a feel of what it's like to fly with Delta, United Airlines, andVirgin Atlantic 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.

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

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

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

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!

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

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!

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

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!

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

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!

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

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?

    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 15 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.

  • 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 £422 on this airline. Additional options worth looking into are Iberia and Air Canada, starting at £425 and £427 round-trip. Users have found that British Airways is 32% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Philadelphia to London Heathrow Airport one-way?

    The cheapet airlines for a one-way flight from Philadelphia to London Heathrow Airport are Air Canada (£294), JetBlue (£295), and British Airways (£297).

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

    Consider Aer Lingus (83%), American Airlines (79%) or Finnair (79%) 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 £219. On average you can expect to pay £588. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £1.

  • 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, January is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £112). Flying from Philadelphia to London Heathrow Airport in August is currently the most expensive (average of £164). 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
Hounslow
Deal
Northampton
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Southend-on-Sea
Folkestone
Watford
Winchester
Swindon
Maidstone

Browse thousands of different options on Cheapflights for your next trip

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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 18 July 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£428Average£525FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IberiaCheapest£435Average£537FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£469Average£563FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£494Average£776FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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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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