$442 Cheap KLM flights Seattle (SEA) to London (LON)

$442 Cheap KLM flights Seattle (SEA) to London (LON)

Prices were available within the past 7 days and start at $442 for one-way flights and $668 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Feb 9 - Thu, Feb 19

SEA

Seattle

LHR

London

$668 Roundtrip, found 2 hours ago

$668

Roundtrip

found 2 hours ago

Select KLM flight, departing Mon, Feb 9 from Seattle to London, returning Thu, Feb 19, priced at $668 found 2 hours ago

Tue, May 5 - Tue, May 12

SEA

Seattle

LCY

London

$688 Roundtrip, just found

$688

Roundtrip

just found

Select KLM flight, departing Tue, May 5 from Seattle to London, returning Tue, May 12, priced at $688 just found

Tue, May 5 - Tue, May 12

SEA

Seattle

LCY

London

$716 Roundtrip, just found

$716

Roundtrip

just found

Select KLM flight, departing Tue, May 5 from Seattle to London, returning Tue, May 12, priced at $716 just found

Wed, Apr 22 - Tue, Apr 28

SEA

Seattle

LCY

London

$816 Roundtrip, just found

$816

Roundtrip

just found

Select KLM flight, departing Wed, Apr 22 from Seattle to London, returning Tue, Apr 28, priced at $816 just found

Thu, Apr 23 - Tue, Apr 28

SEA

Seattle

LCY

London

$838 Roundtrip, just found

$838

Roundtrip

just found

Select KLM flight, departing Thu, Apr 23 from Seattle to London, returning Tue, Apr 28, priced at $838 just found

Thu, Apr 23 - Tue, Apr 28

SEA

Seattle

LCY

London

$866 Roundtrip, just found

$866

Roundtrip

just found

Select KLM flight, departing Thu, Apr 23 from Seattle to London, returning Tue, Apr 28, priced at $866 just found

Wed, Apr 22 - Tue, Apr 28

SEA

Seattle

LCY

London

$957 Roundtrip, just found

$957

Roundtrip

just found

Select KLM flight, departing Wed, Apr 22 from Seattle to London, returning Tue, Apr 28, priced at $957 just found

Wed, Apr 22 - Tue, Apr 28

SEA

Seattle

LCY

London

$985 Roundtrip, just found

$985

Roundtrip

just found

Select KLM flight, departing Wed, Apr 22 from Seattle to London, returning Tue, Apr 28, priced at $985 just found