Flight Routes from Philadelphia to London Heathrow

Trip type

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
08/11/26
direct
AY3866
07h 10min
Return
08/18/26
1 Stopover (EDI)
AY5943, AY3853
22h 35min
Finnair
$833
Best option
Philadelphia
London Heathrow
Outbound
08/11/26
direct
AY5466
07h 05min
Return
08/18/26
direct
AY5467
07h 55min
Finnair
$889
Philadelphia
London Heathrow
Outbound
06/15/26
1 Stopover (DUB)
EI7004, EI0156
10h 30min
Return
07/14/26
1 Stopover (DUB)
EI0183, EI7159
23h 55min
Aer Lingus Irish Airlines
$1,279
Philadelphia
London Heathrow
Outbound
08/11/26
direct
AY5466
07h 05min
Return
08/18/26
1 Stopover (EDI)
AY5943, AY3853
22h 35min
Finnair ?
$881
Philadelphia
London Heathrow
Outbound
08/11/26
direct
AY5466
07h 05min
Return
08/18/26
direct
AY5467
07h 55min
Finnair
$891
Philadelphia
London Heathrow
Outbound
08/11/26
1 Stopover (YUL)
AC8860, AC0866
10h 05min
Return
08/18/26
1 Stopover (FRA)
LH0919, LH4272
25h 35min
Air Canada ?
$897
Philadelphia
London Heathrow
Outbound
08/11/26
2 Stopovers (FRA, WAW)
UA9657, UA8890, BA0845
21h 15min
Return
08/18/26
2 Stopovers (HAM, DUB)
BA0970, EI0393, EI0115
27h 40min
United Airlines, British Airways ?
$902
Philadelphia
London Heathrow
Outbound
08/11/26
direct
IB4664
07h 00min
Return
08/18/26
1 Stopover (MAD)
IB0712, IB4675
13h 20min
Iberia
$908
Philadelphia
London Heathrow
Outbound
08/11/26
direct
BA1587
07h 00min
Return
08/18/26
direct
BA0067
07h 55min
British Airways ?
$939
Philadelphia
London Heathrow
Outbound
08/11/26
1 Stopover (ORD)
UA2784, UA0929
12h 14min
Return
08/18/26
2 Stopovers (BRU, YUL)
AC6345, AC0833, AC8859
25h 59min
United Airlines ?
$982
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 $832.43
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