Flights from Philadelphia to London Heathrow

Our cheapest offers for flights from Philadelphia to London Heathrow

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

Outbound Return Airlines Shop Baggage Price
Philadelphia
London Heathrow
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 Heathrow
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 Heathrow
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 Heathrow
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 Heathrow
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 Heathrow
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 Heathrow
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 Heathrow
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 Heathrow
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 Heathrow

Favorite airline: Aer Lingus
Flight tickets on the route Philadelphia – London Heathrow are most frequently booked with Aer Lingus.
Aer Lingus
26 %
United Airlines
25 %
British Airways
16 %
Direct flights are cheaper
Direct flights on this route are $21.00 cheaper on average than flights with a stopover.
non stop flight
1 stop
2 stops
07h 05min
29h 10min
31h 12min
578 $
599 $
602 $
Favourite connection: via Dublin
When booking flights from Philadelphia to London Heathrow 35 % of travelers prefer to fly via 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 Heathrow

Roundtrip from 638,13 $
Flight duration min. 07:00 / max. 07:25
Return flight duration min. 08:10/ max. 08:45
Distance 5696 km
Flights per week 24
Departure airport Airport Philadelphia International Airport, PA (PHL)
Arrival airport Airport London Heathrow (LHR)
Destination country Flights to United Kingdom
Alternative routes to United Kingdom
Alternative flights to London Heathrow
Flight destinations with a similar price
Flight destinations with a similar price