$425 Cheap Delta flights Seattle (SEA) to London (LHR)

View $425 flight on Tue, Sep 2, 2025Opens in a new window

$425 Cheap Delta flights Seattle (SEA) to London (LHR)

Prices were available within the past 7 days and start at $425 for one-way flights and $662 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Sep 2 - Tue, Sep 16
SEA
Seattle
LHR
London
$662 Roundtrip, found 7 hours ago
$662
Roundtrip
found 7 hours ago
Select Delta flight, departing Tue, Sep 2 from Seattle to London, returning Tue, Sep 16, priced at $662 found 7 hours ago
Delta
Tue, Sep 2 - Tue, Sep 16
SEA
Seattle
LHR
London
$672 Roundtrip, found 7 hours ago
$672
Roundtrip
found 7 hours ago
Select Delta flight, departing Tue, Sep 2 from Seattle to London, returning Tue, Sep 16, priced at $672 found 7 hours ago
Flights from Seattle (SEA) to London (LHR)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, JetBlue Airways, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic
Popular airline
Delta
Distance
7657 km
Average flight time
17 hours 33 mins