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Cheap flights from Philadelphia to London Heathrow Airport from C$ 453

PHL — LHR
21 Oct — 28 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Philadelphia to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Philadelphia to Heathrow

Mon 26/107:35 p.m. -
Nonstop7h 00m
Wed 4/111:10 p.m. -
Nonstop8h 05m
Deal found 16/9C$ 1,105
Wed 25/1112:20 p.m. -
2 stops13h 55m
Wed 9/1210:00 a.m. -
2 stops18h 27m
Deal found 20/9C$ 1,106
Tue 6/1010:05 a.m. -
1 stop18h 55m
Fri 16/1012:40 p.m. -
2 stops15h 06m
Deal found 16/9C$ 1,107
Tue 1/1212:22 p.m. -
2 stops13h 53m
Thu 10/126:30 a.m. -
2 stops15h 05m
Deal found 16/9C$ 1,109
Sun 8/114:29 p.m. -
1 stop12h 26m
Fri 27/1110:50 a.m. -
1 stop13h 07m
Deal found 20/9C$ 1,110
Tue 3/1112:09 p.m. -
1 stop13h 16m
Wed 11/114:00 p.m. -
1 stop13h 55m
Deal found 17/9C$ 1,112
Tue 17/1112:25 p.m. -
1 stop13h 25m
Thu 26/1110:50 a.m. -
1 stop13h 07m
Deal found 16/9C$ 1,113
Thu 3/124:47 p.m. -
1 stop9h 13m
Wed 9/126:30 a.m. -
1 stop12h 35m
Deal found 19/9C$ 1,114
Wed 11/111:16 p.m. -
2 stops14h 54m
Wed 25/119:10 a.m. -
2 stops17h 28m
Deal found 20/9C$ 1,116
Wed 18/113:05 p.m. -
2 stops13h 05m
Wed 25/117:40 a.m. -
2 stops16h 11m
Deal found 16/9C$ 1,119
Sun 11/1010:38 a.m. -
2 stops14h 52m
Tue 20/1012:00 p.m. -
2 stops16h 30m
Deal found 20/9C$ 1,120
Wed 9/129:10 p.m. -
1 stop10h 10m
Sun 10/16:20 p.m. -
1 stop24h 45m
Deal found 19/9C$ 1,121

Find flight deals from Philadelphia to Heathrow

Round-trip from

C$ 1,105

One-way from

C$ 453

Popular in

June

Cheapest in

February

Average price

C$ 1,440
British Airways
  • British Airways
  • 9/12-15/12
  • Nonstop
  • 15h 05m total
  • Philadelphia to London
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JetBlue
  • JetBlue
  • 22/10-31/12
  • 1 total stop
  • 19h 00m total
  • Philadelphia to London
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Highest demand for flights based on searches. 21% potential increase in price (C$ 557 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 82 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Thu 12/11

10:27 a.m.-6:55 a.m.

1 stop15h 28m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 460

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sun 15/11

10:27 a.m.-6:55 a.m.

1 stop15h 28m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 460

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 17/11

3:35 p.m.-6:55 a.m.

1 stop10h 20m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 460

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Wed 17/3

9:54 a.m.-6:55 a.m.

1 stop17h 01m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 466
Quickest round-trip

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Wed 17/3

7:35 p.m.-6:35 a.m.

Nonstop7h 00m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 489

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sat 9/1

4:59 p.m.-9:20 p.m.

2 stops23h 21m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 495

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Wed 10/3

1:00 p.m.-7:15 a.m.

2 stops13h 15m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 495

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 16/3

10:05 a.m.-10:50 a.m.

2 stops20h 45m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 495

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sun 10/1

11:17 a.m.-6:40 a.m.

2 stops14h 23m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 495

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Thu 18/3

7:35 p.m.-6:35 a.m.

Nonstop7h 00m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 559

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/9

Showing 1-10 of 24 resultsSorted by cheapest first
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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 round-trip price

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?

The price you pay for your flight from Philadelphia to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 76 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?

Currently, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of C$ 984). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of C$ 2,079). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to London Heathrow Airport as you normally would.

How much does it cost to fly round-trip from Philadelphia to London Heathrow Airport?

Airfare is below average for this route at the moment.

Philadelphia to London Heathrow Airport flights typically cost between C$ 1,291 and C$ 1,717 in October.
The cheapest round-trip price found within the last 5 days was C$ 1,105 on British Airways (26 Oct-4 Nov).

Related info for your journey

  • What airport do you fly from for flights from Philadelphia to London Heathrow?

    For a flight from Philadelphia to London Heathrow, you will be flying from Philadelphia. Philadelphia (PHL) is just 11.2 km from the centre of the city. Philadelphia is the only Philadelphia airport and it handles 13 outbound flights to London Heathrow per day. 0 airlines have flights to London Heathrow from Philadelphia on a regular basis.

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

    There are many flights that can get you from Philadelphia to London Heathrow Airport in 7h. Fly via British Airways or Delta to get the fastest option. The distance between Philadelphia and London Heathrow Airport is about 5686 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The top 3 most reliable airlines when flying from Philadelphia to London Heathrow Airport are Malaysia Airlines (82%), American Airlines (78%) and Finnair (78%).

  • 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, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of C$ 984). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of C$ 2,079). 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
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Luton
Slough
Marlow
Cobham
Hounslow
Leamington Spa
Wembley
Northampton
Watford
High Wycombe
Stratford-upon-Avon
Moreton-in-Marsh

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Philadelphia to Heathrow

Newark to Heathrow flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to Gatwick flights
John F Kennedy Intl to Heathrow flights

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Deals for Philadelphia to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Philadelphia to Heathrow.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Philadelphia to Heathrow, users can toggle the no change fees filter when performing a flight search.

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Of course! You can now track prices for flights from Philadelphia to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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