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Cheap flights from Philadelphia to London Heathrow Airport from C$ 423

PHL — LHR
14 Dec — 21 Dec1
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

Tue 1/129:30 a.m. -
1 stop16h 25m
Wed 9/129:20 a.m. -
1 stop14h 23m
Deal found 10/11C$ 1,182
Thu 26/1112:45 p.m. -
1 stop13h 10m
Sat 5/129:20 a.m. -
1 stop14h 23m
Deal found 11/11C$ 1,189
Tue 1/129:30 a.m. -
1 stop16h 25m
Tue 8/129:20 a.m. -
1 stop14h 23m
Deal found 9/11C$ 1,191
Mon 16/1110:27 a.m. -
1 stop15h 28m
Thu 29/48:40 a.m. -
1 stop15h 12m
Deal found 10/11C$ 1,208
Mon 30/1112:43 p.m. -
1 stop13h 12m
Wed 9/129:20 a.m. -
1 stop14h 23m
Deal found 10/11C$ 1,211
Mon 30/1112:43 p.m. -
1 stop13h 12m
Sun 6/129:20 a.m. -
1 stop14h 23m
Deal found 11/11C$ 1,218
Mon 30/1112:43 p.m. -
1 stop13h 12m
Sat 5/129:20 a.m. -
1 stop14h 23m
Deal found 10/11C$ 1,223
Fri 4/129:30 a.m. -
1 stop16h 25m
Thu 10/129:20 a.m. -
1 stop14h 23m
Deal found 10/11C$ 1,231
Tue 1/129:30 a.m. -
1 stop16h 25m
Thu 17/129:20 a.m. -
1 stop14h 25m
Deal found 13/11C$ 1,238
Sat 28/119:10 a.m. -
1 stop16h 45m
Fri 4/129:20 a.m. -
1 stop14h 23m
Deal found 11/11C$ 1,239
Tue 8/129:30 a.m. -
1 stop16h 25m
Thu 17/129:20 a.m. -
1 stop14h 25m
Deal found 13/11C$ 1,265
Tue 8/129:30 a.m. -
1 stop16h 25m
Sat 12/129:20 a.m. -
1 stop14h 23m
Deal found 11/11C$ 1,266

Find flight deals from Philadelphia to Heathrow

Round-trip from

C$ 1,182

One-way from

C$ 423

Popular in

June

Cheapest in

February

Average price

C$ 1,536
JetBlue
  • JetBlue
  • 6/12-10/12
  • 2 total stops
  • 30h 48m total
  • Philadelphia to London
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JetBlue
  • JetBlue
  • 30/11-31/12
  • 1 total stop
  • 16h 45m total
  • Philadelphia to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (C$ 546 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 80 potential savings vs. average RT price).
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Average for round-trip flights in November 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

Mon 30/11

9:10 a.m.-6:55 a.m.

1 stop16h 45m

London Heathrow

Wed 31/12

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

Nonstop0h 00m

C$ 423

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sun 17/1

3:38 p.m.-6:53 a.m.

1 stop10h 15m

London Heathrow

Wed 31/12

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

Nonstop0h 00m

C$ 426

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 8/12

9:30 a.m.-6:55 a.m.

1 stop16h 25m

London Heathrow

Wed 31/12

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

Nonstop0h 00m

C$ 426

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Fri 22/1

3:38 p.m.-6:53 a.m.

1 stop10h 15m

London Heathrow

Wed 31/12

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

Nonstop0h 00m

C$ 426
Quickest round-trip

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 16/3

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$ 506

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sun 14/3

9:42 a.m.-6:20 a.m.

2 stops16h 38m

London Heathrow

Wed 31/12

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

Nonstop0h 00m

C$ 512

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sat 20/3

7:00 p.m.-7:10 a.m.

2 stops32h 10m

London Heathrow

Wed 31/12

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

Nonstop0h 00m

C$ 518

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Thu 10/12

9:30 a.m.-6:55 a.m.

1 stop16h 25m

London Heathrow

Wed 31/12

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

Nonstop0h 00m

C$ 689

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Tue 1/12

9:30 a.m.-9:35 p.m.

3 stops31h 05m

London Heathrow

Wed 31/12

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

Nonstop0h 00m

C$ 878

PhiladelphiaLondon

PHL Philadelphia - LHR London Heathrow

PHLLHR

Philadelphia

Sun 10/1

3:38 p.m.-5:30 p.m.

3 stops20h 52m

London Heathrow

Wed 31/12

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

Nonstop0h 00m

C$ 880

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/11

Showing 1-10 of 22 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$ 1,049). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of C$ 2,125). 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$ 1,282 and C$ 1,832 in December.
The cheapest round-trip price found within the last 5 days was C$ 1,182 on JetBlue (1 Dec-9 Dec).

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 10 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 14h 35m. Fly via JetBlue or Scandinavian Airlines 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 (93%), American Airlines (92%) and British Airways (92%).

  • 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$ 1,049). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of C$ 2,125). 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
Kingston upon Thames
Slough
Marlow
Cobham
Hounslow
Wembley
Leamington Spa
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

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