Flights to Milton Keynes from Seattle - $298

View $298 flight on Wed, Jan 28, 2026Opens in a new window

Popular airlines from Seattle to Milton Keynes

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Cheap Flights from Seattle to Milton Keynes (SEA-LON)

Prices were available within the past 7 days and start at $298 for one-way flights and $398 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Virgin Atlantic
Wed, Jul 30 - Tue, Aug 12
SEA
Seattle
LHR
London
$398 Roundtrip, found 14 hours ago
$398
Roundtrip
found 14 hours ago
Select Virgin Atlantic flight, departing Wed, Jul 30 from Seattle to London, returning Tue, Aug 12, priced at $398 found 14 hours ago
Delta
Sun, Aug 24 - Mon, Sep 1
SEA
Seattle
LHR
London
$400 Roundtrip, just found
$400
Roundtrip
just found
Select Delta flight, departing Sun, Aug 24 from Seattle to London, returning Mon, Sep 1, priced at $400 just found
Virgin Atlantic
Sun, Aug 24 - Mon, Sep 1
SEA
Seattle
LHR
London
$400 Roundtrip, just found
$400
Roundtrip
just found
Select Virgin Atlantic flight, departing Sun, Aug 24 from Seattle to London, returning Mon, Sep 1, priced at $400 just found
United
Wed, Jul 30 - Tue, Aug 12
SEA
Seattle
LHR
London
$424 Roundtrip, found 14 hours ago
$424
Roundtrip
found 14 hours ago
Select United flight, departing Wed, Jul 30 from Seattle to London, returning Tue, Aug 12, priced at $424 found 14 hours ago
KLM
Sun, Aug 24 - Mon, Sep 1
SEA
Seattle
LHR
London
$440 Roundtrip, just found
$440
Roundtrip
just found
Select KLM flight, departing Sun, Aug 24 from Seattle to London, returning Mon, Sep 1, priced at $440 just found
American Airlines
Sun, Aug 24 - Mon, Sep 1
SEA
Seattle
LHR
London
$445 Roundtrip, just found
$445
Roundtrip
just found
Select American Airlines flight, departing Sun, Aug 24 from Seattle to London, returning Mon, Sep 1, priced at $445 just found

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

October is typically the cheapest month to fly

From $480 - $866 per traveler.

Graph displaying average flight prices per month

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