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
31/01/26
1 Stopover (BOS)
B61621, B60359
14h 18min
Return
03/02/26
1 Stopover (BOS)
B60260, B61620
17h 15min
JetBlue Airways
£442
Best option
London Heathrow
Philadelphia
Outbound
20/03/26
direct
AY5467
08h 05min
Return
17/04/26
direct
AY3866
07h 10min
Finnair
£653
London Heathrow
Philadelphia
Outbound
31/01/26
1 Stopover (BOS)
B61621, B60359
14h 18min
Return
03/02/26
1 Stopover (BOS)
B60260, B61620
17h 15min
JetBlue Airways ?
£455
London Heathrow
Philadelphia
Outbound
31/01/26
2 Stopovers (BRU, YUL)
AC6330, AC0833, AC8859
12h 57min
Return
03/02/26
2 Stopovers (YYZ, YHZ)
AC8935, AC0600, AC0868
23h 30min
Air Canada
£485
London Heathrow
Philadelphia
Outbound
31/01/26
2 Stopovers (BRU, YUL)
AC6330, AC0833, AC8859
12h 57min
Return
03/02/26
2 Stopovers (YYZ, YHZ)
AC8935, AC0600, AC0868
23h 30min
Air Canada
£498
London Heathrow
Philadelphia
Outbound
31/01/26
2 Stopovers (BRU, YUL)
AC6330, AC0833, AC8859
12h 57min
Return
03/02/26
2 Stopovers (YYZ, YHZ)
AC8935, AC0600, AC0868
23h 30min
Air Canada
£499
London Heathrow
Philadelphia
Outbound
31/01/26
1 Stopover (DUB)
BA5951, BA1580
11h 15min
Return
03/02/26
1 Stopover (CLT)
BA1983, BA1595
10h 40min
British Airways ?
£525
London Heathrow
Philadelphia
Outbound
31/01/26
2 Stopovers (BRU, YUL)
AC6330, AC0833, AC8859
12h 57min
Return
03/02/26
1 Stopover (YUL)
AC8862, AC0864
10h 40min
Air Canada ?
£547
London Heathrow
Philadelphia
Outbound
31/01/26
1 Stopover (DUB)
BA5951, BA1580
11h 15min
Return
03/02/26
1 Stopover (DUB)
BA1579, BA5964
11h 00min
British Airways
£548
London Heathrow
Philadelphia
Outbound
20/03/26
1 Stopover (DUB)
EI0153, EI0115
12h 10min
Return
17/04/26
1 Stopover (DUB)
EI0114, EI0166
13h 25min
Aer Lingus Irish Airlines ?
£564
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 441,90 £
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