Flights from London to Philadelphia

Our cheapest offers for flights from London to Philadelphia

Here you can compare cheap flights from London (LON) 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
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
Philadelphia
Outbound
20/03/26
direct
AY5467
08h 05min
Return
17/04/26
direct
AY3866
07h 10min
Finnair
£653
London
Philadelphia
Outbound
20/03/26
2 Stopovers (KEF, BOS)
FI0471, FI0635, FI7853
47h 38min
Return
17/04/26
2 Stopovers (BOS, KEF)
FI7854, FI0632, FI0472
25h 20min
Icelandair
£640
London
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
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
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
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
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
Philadelphia
Outbound
20/03/26
1 Stopover (DUB)
BA4460, AA0723
12h 05min
Return
17/04/26
1 Stopover (DUB)
AA0722, BA4461
11h 10min
British Airways, American Airlines
£532
London
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
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 to Philadelphia

Favourite airline: Aer Lingus
55 % of travellers choose to book flights on this route with Aer Lingus, British Airways and Virgin Atlantic.
Aer Lingus
29 %
British Airways
19 %
Virgin Atlantic
7 %
Stopover flights are the cheapest connection
Flights with a stopover are on average £325.00 cheaper than direct flights.
non stop flight
1 stop
2 stops
08h 20min
11h 10min
41h 43min
1 034 GBP
709 GBP
827 GBP
Favourite connection: via Dublin
The most popular flights on this route are via Dublin and are booked by 52 % of all travellers.
Route
bookings
1 stopover Dublin
11h 10min, from 709 GBP
52 %
Direct flights
08h 20min, from 1 034 GBP
16 %
1 stopover Boston Logan
13h 19min, from 848 GBP
13 %

Important flight information

Flight information: London - Philadelphia

Outbound and return from 441,90 GBP
Flight duration min. 08:10 / max. 08:45
Return flight duration min. 07:00/ max. 07:25
Distance 5715 km
Flights per week 23
Departure airport Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
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