Flights from Philadelphia to London

Our cheapest offers for flights from Philadelphia to London

Here you can compare cheap flights from Philadelphia (PHL) to London (LON) 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 London. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Philadelphia
London
Outbound
04/12/25
1 Stopover (ORD)
UA0308, UA0920
34h 19min
Return
04/27/25
1 Stopover (FRA)
UA8810, UA9658
11h 30min
United Airlines ?
$689
Best option
Philadelphia
London
Outbound
04/12/25
direct
AY5667
07h 10min
Return
04/27/25
direct
AY4050
07h 45min
Finnair
$846
Philadelphia
London
Outbound
04/12/25
1 Stopover (ORD)
UA0308, UA0929
32h 19min
Return
04/27/25
1 Stopover (FRA)
UA9546, UA9658
14h 30min
United Airlines ?
$711
Philadelphia
London
Outbound
04/12/25
1 Stopover (ORD)
UA0308, UA0929
32h 19min
Return
04/27/25
1 Stopover (YUL)
AC0865, AC8859
29h 42min
United Airlines ?
$728
Philadelphia
London
Outbound
04/12/25
1 Stopover (BOS)
BA6808, BA1540
11h 50min
Return
04/27/25
direct
BA0067
07h 55min
British Airways ?
$790
Philadelphia
London
Outbound
04/12/25
1 Stopover (BOS)
BA4776, BA1540
08h 50min
Return
04/27/25
direct
BA0067
07h 55min
British Airways
$791
Philadelphia
London
Outbound
04/12/25
1 Stopover (BOS)
BA4776, BA1540
08h 50min
Return
04/27/25
direct
BA0067
07h 55min
British Airways
$793
Philadelphia
London
Outbound
04/12/25
1 Stopover (BOS)
BA4776, BA1540
08h 50min
Return
04/27/25
direct
BA0067
07h 55min
British Airways
$802
Philadelphia
London
Outbound
04/12/25
1 Stopover (ORD)
UA0308, UA0929
32h 19min
Return
04/27/25
1 Stopover (FRA)
UA9232, UA9658
12h 30min
United Airlines ?
$810
Philadelphia
London
Outbound
04/12/25
1 Stopover (YYZ)
AC8931, AC0852
19h 35min
Return
04/27/25
1 Stopover (YUL)
AC0865, AC8859
29h 42min
Air Canada ?
$1,046
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from Philadelphia to London

Favorite airline: Aer Lingus
67 % of travelers choose to book flights on this route with Aer Lingus, United Airlines and British Airways.
Aer Lingus
26 %
United Airlines
25 %
British Airways
16 %
Direct flights are cheaper
Flights with a stopover are on average $21.00 more expensive than direct flights.
non stop flight
1 stop
2 stops
07h 05min
29h 10min
31h 12min
$578
$599
$602
Favourite connection: via Dublin
35 % of booked tickets on this route are for flights with a transfer in Dublin.
Route
bookings
1 stopover Dublin
10h 35min, from $719
35 %
1 stopover Montréal-Pierre Elliott Trudeau International Airport
09h 50min, from $678
25 %
Direct flights
07h 05min, from $578
20 %

Important flight information

Flight information: Philadelphia - London

Roundtrip from $688.31
Flight duration min. 07:00 / max. 07:25
Return flight duration min. 08:10/ max. 08:45
Distance 5715 km
Flights per week 24
Departure airport Airport Philadelphia International Airport, PA (PHL)
Arrival airport Airport London, all Airports (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Destination country Flights to United Kingdom
Alternative routes to United Kingdom
Alternative flights to London
Flight destinations with a similar price
Flight destinations with a similar price