$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 11 hours ago
$662
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Sep 2 from Seattle to London, returning Tue, Sep 16, priced at $662 found 11 hours ago
Delta
Tue, Sep 2 - Tue, Sep 16
SEA
Seattle
LHR
London
$672 Roundtrip, found 11 hours ago
$672
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Sep 2 from Seattle to London, returning Tue, Sep 16, priced at $672 found 11 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, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic, WestJet
Popular airline
KLM
Distance
7657 km
Average flight time
17 hours 33 mins