$555 Cheap United flights Philadelphia (PHL) to London (LHR)

View $555 flight on Wed, Apr 22, 2026Opens in a new window

$555 Cheap United flights Philadelphia (PHL) to London (LHR)

Prices were available within the past 7 days and start at $555 for one-way flights and $620 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, May 13 - Thu, May 21
PHL
Philadelphia
LHR
London
$620 Roundtrip, found 1 day ago
$620
Roundtrip
found 1 day ago
Select United flight, departing Wed, May 13 from Philadelphia to London, returning Thu, May 21, priced at $620 found 1 day ago
United
Wed, Apr 22 - Tue, Apr 28
PHL
Philadelphia
LHR
London
$622 Roundtrip, found 2 days ago
$622
Roundtrip
found 2 days ago
Select United flight, departing Wed, Apr 22 from Philadelphia to London, returning Tue, Apr 28, priced at $622 found 2 days ago

Find the cheapest month to fly from Philadelphia (PHL) to London (LHR)

October is typically the cheapest month to fly

From $477 - $830 per traveler.

Travel information

0
Origin airport
Philadelphia Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, American Airlines, British Airways, Delta, Finnair, Iberia, JetBlue Airways, Lufthansa, United, Virgin Atlantic
Popular airline
British Airways
Distance
5656 km

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