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
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
Philadelphia
Outbound
09/10/25
direct
AY4050
07h 55min
Return
14/10/25
direct
AY4045
07h 10min
Finnair
£585
London
Philadelphia
Pay attention to transfer at connecting flight
Outbound
13/10/25
1 Stopover (MIA)
Z00723, NK3150
32h 29min
Return
15/10/25
1 Stopover (MCO)
NK3161, Z00784
20h 00min
Norse Atlantic UK, Spirit Airlines
£550
London
Philadelphia
Outbound
20/10/25
1 Stopover (MAD)
IB1864, AY5680
24h 20min
Return
11/11/25
1 Stopover (MAD)
AY3812, IB1863
17h 50min
Iberia, Finnair
£616
London
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
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
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
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
London
Philadelphia
Outbound
20/10/25
direct
BA1538
07h 55min
Return
11/11/25
1 Stopover (BOS)
BA6808, BA0202
09h 55min
British Airways ?
£529
London
Philadelphia
Outbound
20/10/25
2 Stopovers (BRU, YUL)
AC6330, AC0833, AC8859
12h 48min
Return
11/11/25
1 Stopover (YUL)
AC8862, AC0864
10h 40min
Air Canada ?
£537
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
£709
£827
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
52 %
Direct flights
08h 20min, from £1,034
16 %
1 stopover Boston Logan
13h 19min, from £848
13 %

Important flight information

Flight information: London - 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 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