Flights from London Heathrow to Philadelphia

Our cheapest offers for flights from London Heathrow to Philadelphia

Here you can compare cheap flights from London Heathrow (LHR) to Philadelphia (PHL) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Philadelphia. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
London Heathrow
Philadelphia
Outbound
20/10/25
1 Stopover (FRA)
LH0901, LH4272
11h 30min
Return
11/11/25
1 Stopover (FRA)
LH4273, LH0908
16h 15min
Lufthansa
£518
Best option
London Heathrow
Philadelphia
Outbound
30/06/25
direct
BA1538
07h 55min
Return
18/07/25
direct
BA1533
07h 10min
British Airways
£543
London Heathrow
Philadelphia
Outbound
30/06/25
1 Stopover (YUL)
AC0867, AC1187
10h 03min
Return
18/07/25
1 Stopover (YUL)
AC8860, AC0866
10h 10min
Air Canada
£624
London Heathrow
Philadelphia
Outbound
20/10/25
1 Stopover (FRA)
LH0901, LH4272
11h 30min
Return
11/11/25
1 Stopover (FRA)
LH4273, LH0908
16h 15min
Lufthansa
£521
London Heathrow
Philadelphia
Outbound
03/09/25
1 Stopover (BCN)
AA6811, AA0743
15h 00min
Return
15/09/25
1 Stopover (YUL)
AA5777, AA6919
31h 50min
American Airlines ?
£521
London Heathrow
Philadelphia
Outbound
22/06/25
2 Stopovers (BRU, YUL)
AC6330, AC0833, AC1187
12h 43min
Return
05/07/25
1 Stopover (YUL)
AC8858, AC0866
15h 45min
Air Canada
£523
London Heathrow
Philadelphia
Outbound
17/06/25
1 Stopover (EDI)
BA1432, BA1508
11h 55min
Return
01/07/25
1 Stopover (BOS)
BA4776, BA1540
09h 19min
British Airways ?
£524
London Heathrow
Philadelphia
Outbound
20/10/25
1 Stopover (FRA)
LH0901, LH4272
11h 30min
Return
11/11/25
1 Stopover (FRA)
LH4273, LH0918
20h 15min
Lufthansa
£525
London Heathrow
Philadelphia
Outbound
20/10/25
1 Stopover (FRA)
LX8810, LX9658
11h 30min
Return
11/11/25
1 Stopover (ORD)
LX0622, LX0929
14h 45min
Swiss International Air Lines
£527
London Heathrow
Philadelphia
Outbound
20/10/25
1 Stopover (FRA)
UA8810, UA9658
11h 30min
Return
11/11/25
1 Stopover (YUL)
UA6616, UA8296
10h 40min
United Airlines ?
£528
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from London Heathrow to Philadelphia

Favourite airline: Aer Lingus
76 % of flights booked on the route from London Heathrow to Philadelphia are booked with Aer Lingus, British Airways and United Airlines.
Aer Lingus
45 %
British Airways
21 %
United Airlines
10 %
Stopover flights are the cheapest connection
Compared to flights with a stopover, direct flights are £325.00 more expensive on this route.
non stop flight
1 stop
2 stops
08h 20min
11h 10min
51h 25min
1 034 £
709 £
1 282 £
Favourite connection: via Dublin
When booking flights from London Heathrow to Philadelphia 59 % of travellers prefer to fly via Dublin.
Route
bookings
1 stopover Dublin
11h 10min, from 709 £
59 %
Direct flights
08h 20min, from 1 034 £
19 %
1 stopover Montréal-Pierre Elliott Trudeau International Airport
30h 04min, from 839 £
11 %

Important flight information

Flight information: London Heathrow - Philadelphia

Outbound and return from 517,67 £
Flight duration min. 08:10 / max. 08:45
Return flight duration min. 07:00/ max. 07:25
Distance 5696 km
Flights per week 23
Departure airport Airport London Heathrow (LHR)
Arrival airport Airport Philadelphia International Airport, PA (PHL)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Philadelphia
Flight destinations with a similar price