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Cheap flights from Philadelphia to London Heathrow Airport from £175

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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
3 Sep — 10 Sep1
1 adult

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 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 29 August 2025.

Round-trip from

£367

One-way from

£175

Popular in

June

Cheapest in

September

Average price

£536

Good round-trip deal

£381 or less

Good one-way deal

£304 or less
Aer Lingus
  • Aer Lingus
  • 10/12-16/12
  • 2 total stops
  • 21h 45m total
  • Philadelphia to London
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26/9
  • 26/9
  • 2 total stops
  • 19h 35m total
  • Philadelphia to London
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Highest demand for flights based on searches. 18% potential increase in price (£105 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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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

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 29 August 2025.

Wed 10/1217:30PHL - LHR
1 stop10h 35mAer Lingus
Tue 16/1209:50LHR - PHL
1 stop11h 10mAer Lingus
Deal found 28/8£367
Wed 8/1020:30PHL - LHR
1 stop9h 40mAer Lingus
Thu 30/1008:50LHR - PHL
1 stop12h 10mAer Lingus
Deal found 26/8£369
Wed 22/1022:15PHL - LHR
Nonstop7h 05mBritish Airways
Tue 4/1110:15LHR - PHL
Nonstop8h 10mBritish Airways
Deal found 28/8£381
Mon 29/919:50PHL - LHR
Nonstop7h 15mBritish Airways
Tue 14/1008:55LHR - PHL
1 stop13h 58mBritish Airways
Deal found 27/8£389
Wed 8/1020:30PHL - LHR
1 stop9h 40mAer Lingus
Mon 13/1013:25LHR - PHL
1 stop10h 35mAer Lingus
Deal found 27/8£398
Mon 3/1118:35PHL - LHR
Nonstop7h 00mIberia
Sun 9/1113:10LHR - PHL
Nonstop8h 05mIberia
Deal found 28/8£418
Sun 26/1020:45PHL - LHR
Nonstop7h 05mIberia
Sun 2/1110:05LHR - PHL
Nonstop8h 05mIberia
Deal found 27/8£419
Thu 16/1016:00PHL - LHR
1 stop10h 50mBritish Airways
Wed 22/1013:30LHR - PHL
Nonstop7h 55mBritish Airways
Deal found 27/8£422
Wed 5/1114:58PHL - LHR
1 stop13h 17mBritish Airways
Mon 10/1113:10LHR - PHL
Nonstop8h 05mBritish Airways
Deal found 27/8£423

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 29 August 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 25/1

19:45-07:50

Nonstop7h 05m

London Heathrow

Sun 1/2

10:05-13:10

Nonstop8h 05m

£418

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 25/1

18:35-10:25

1 stop10h 50m

London Heathrow

Sun 1/2

10:05-13:10

Nonstop8h 05m

£421

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 30/10

19:35-06:35

Nonstop7h 00m

London Heathrow

Mon 3/11

10:05-13:10

Nonstop8h 05m

£455

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Thu 30/10

19:10-09:15

1 stop10h 05m

London Heathrow

Mon 3/11

13:10-16:15

Nonstop8h 05m

£458

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 6/1

13:30-06:55

1 stop12h 25m

London Heathrow

Tue 13/1

09:20-21:24

1 stop17h 04m

£474

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 26/11

16:46-06:55

1 stop9h 09m

London Heathrow

Wed 3/12

09:20-16:37

1 stop12h 17m

£474

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Sun 28/9

10:20-06:30

1 stop15h 10m

London Heathrow

Wed 8/10

08:25-21:55

1 stop18h 30m

£474

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 7/1

13:30-06:55

1 stop12h 25m

London Heathrow

Tue 13/1

09:20-21:24

1 stop17h 04m

£474

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Tue 7/10

15:31-06:30

1 stop9h 59m

London Heathrow

Tue 21/10

08:25-21:55

1 stop18h 30m

£474

PhiladelphiaLondon

PHL - LHR

PHLLHR

Philadelphia

Wed 15/10

15:31-06:30

1 stop9h 59m

London Heathrow

Wed 22/10

08:25-21:55

1 stop18h 30m

£474

Flights are sorted by cheapest return flights first.

Deals found on 28/8

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 22 August 2025.

The best time to book flights from Philadelphia to London Heathrow Airport is 9 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 29 August 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 18% on flights from Philadelphia to London Heathrow Airport by exploring options for tickets at midday.

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 29 August 2025.
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
10,000 reviews
Check prices

Comfort

7.2

Food

6.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Comfort

7.2

Food

6.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
JetBlue
7.2
Good
2,920 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Comfort

7.2

Food

6.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
Aer Lingus
7.2
Good
1,240 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Comfort

7.2

Food

6.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
Iberia
7.0
Good
2,894 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Comfort

7.2

Food

6.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
British Airways
6.7
Okay
7,320 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Comfort

7.2

Food

6.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.

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 12 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 5 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 £418, British Airways can have you in London Heathrow Airport from Philadelphia in 7h 05m. 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 JetBlue. Our recent data shows that you can find tickets from as low as £424 on this airline. Additional options worth looking into are British Airways and Iberia, starting at £441 and £459 round-trip. Users have found that JetBlue is 30% cheaper than the other options available to this destination.

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

    Consider Aer Lingus (80%), American Airlines (67%) or Finnair (67%) 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 £292. On average you can expect to pay £388. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £380.

  • 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
Gatwick
Slough
Northampton
Luton
Deal
Wembley
Ilford
Crawley
Hayes
Watford
Folkestone
Ipswich
Chichester
Winchester
Eastbourne
Swindon
Dartford

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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 5 airlines flying from Philadelphia to Heathrow

Discover the top 5 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 29 August 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£424Average£537FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
British AirwaysCheapest£441Average£551FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IberiaCheapest£459Average£538FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£490Average£770FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£506Average£644FlexibilityNo 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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