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
03/07/26
1 Stopover (BOS)
B60760, B61620
10h 53min
Return
03/15/26
1 Stopover (BOS)
B61621, B60859
14h 05min
JetBlue Airways ?
$639
found 3 days ago
Best option
Philadelphia
London
Outbound
03/07/26
direct
AY3804
07h 05min
Return
03/15/26
direct
AY3805
08h 05min
Finnair ?
$1,099
found 3 days ago
Philadelphia
London
Outbound
03/07/26
2 Stopovers (YUL, YHZ)
AC8862, AC0660, AC0868
24h 05min
Return
03/15/26
1 Stopover (FRA)
LH0921, LH4272
14h 35min
Air Canada
$742
found 3 days ago
Philadelphia
London
Outbound
03/07/26
1 Stopover (BOS)
B60760, B61620
10h 53min
Return
03/15/26
1 Stopover (BOS)
B61621, B60859
14h 05min
JetBlue Airways ?
$780
found 3 days ago
Philadelphia
London
Outbound
03/07/26
1 Stopover (YUL)
LH6565, LH6839
10h 40min
Return
03/15/26
1 Stopover (FRA)
LH0921, LH4272
14h 35min
Lufthansa ?
$827
found 3 days ago
Philadelphia
London
Outbound
03/07/26
1 Stopover (YUL)
LH6565, LH6839
10h 40min
Return
03/15/26
1 Stopover (FRA)
LH0921, LH4272
14h 35min
Lufthansa
$837
found 3 days ago
Philadelphia
London
Outbound
03/07/26
1 Stopover (ATL)
KL5165, KL6043
32h 51min
Return
03/15/26
1 Stopover (ATL)
KL6048, KL5165
13h 34min
KLM ?
$861
found 3 days ago
Philadelphia
London
Outbound
03/07/26
1 Stopover (ORD)
UA0308, UA0929
31h 45min
Return
03/15/26
1 Stopover (FRA)
LH0925, LH4272
12h 35min
United Airlines ?
$872
found 3 days ago
Philadelphia
London
Outbound
03/07/26
direct
IB4664
07h 05min
Return
03/15/26
1 Stopover (BOS)
IB4261, IB4566
11h 01min
Iberia ?
$882
found 3 days ago
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 $638.13
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 (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