$600 Cheap Alaska Airlines flights Seattle (SEA) to London (LHR)

View $600 flight on Thu, Oct 1, 2026Opens in a new window

$600 Cheap Alaska Airlines flights Seattle (SEA) to London (LHR)

Prices were available within the past 7 days and start at $600 for one-way flights and $1,172 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, Oct 1 - Mon, Oct 19
SEA
Seattle
LHR
London
$1,172 Roundtrip, found 6 days ago
$1,172
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Oct 1 from Seattle to London, returning Mon, Oct 19, priced at $1,172 found 6 days ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city center is 28 minutes. Flights from $853
LHR
Heathrow
Cheapest
Average driving time to city center28 min
Flights from $853

Find the cheapest month to fly from Seattle (SEA) to London (LHR)

April is typically the cheapest month to fly

From $590 - $1,107 per traveler.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Icelandair, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic, WestJet
Popular airline
British Airways
Distance
7657 km
Average flight time
17 hours 35 mins

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