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
04/26/25
1 Stopover (ORD)
UA2665, UA0920
32h 49min
Return
05/23/25
1 Stopover (IAD)
UA0919, UA6125
11h 25min
United Airlines ?
$750
Best option
Philadelphia
London Heathrow
Outbound
04/26/25
direct
AY5667
07h 10min
Return
05/23/25
direct
AY4050
07h 45min
Finnair
$802
Philadelphia
London Heathrow
Outbound
04/26/25
1 Stopover (ATL)
VS4161, VS4044
31h 02min
Return
05/23/25
1 Stopover (ATL)
VS4009, VS2660
14h 02min
Virgin Atlantic Airways ?
$766
Philadelphia
London Heathrow
Outbound
04/26/25
direct
IB4664
07h 10min
Return
05/23/25
direct
IB4673
07h 45min
Iberia
$810
Philadelphia
London Heathrow
Outbound
04/26/25
direct
BA1587
07h 10min
Return
05/23/25
direct
BA0067
07h 55min
British Airways ?
$811
Philadelphia
London Heathrow
Outbound
04/26/25
1 Stopover (YUL)
AC8858, AC0866
10h 00min
Return
05/23/25
1 Stopover (YUL)
AC0865, AC8859
29h 31min
Air Canada
$811
Philadelphia
London Heathrow
Outbound
04/26/25
direct
BA0066
07h 10min
Return
05/23/25
direct
BA0067
07h 55min
British Airways ?
$826
Philadelphia
London Heathrow
Outbound
04/26/25
1 Stopover (ORD)
UA2665, UA0920
32h 49min
Return
05/23/25
1 Stopover (YUL)
UA8297, UA8334
13h 16min
United Airlines ?
$843
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 USD
599 USD
602 USD
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 USD
35 %
1 stopover Montréal-Pierre Elliott Trudeau International Airport
09h 50min, from 678 USD
25 %
Direct flights
07h 05min, from 578 USD
20 %

Important flight information

Flight information: Philadelphia - London Heathrow

Roundtrip from 749,68 USD
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