$440 Cheap KLM flights Seattle (SEA) to London (LON)

$440 Cheap KLM flights Seattle (SEA) to London (LON)

Prices were available within the past 7 days and start at $440 for one-way flights and $469 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 2 - Sun, Sep 7

SEA

Seattle

LHR

London

$469 Roundtrip, found 8 hours ago

$469

Roundtrip

found 8 hours ago

Select KLM flight, departing Tue, Sep 2 from Seattle to London, returning Sun, Sep 7, priced at $469 found 8 hours ago

Fri, Sep 26 - Sat, Oct 4

SEA

Seattle

LHR

London

$547 Roundtrip, found 7 hours ago

$547

Roundtrip

found 7 hours ago

Select KLM flight, departing Fri, Sep 26 from Seattle to London, returning Sat, Oct 4, priced at $547 found 7 hours ago

Mon, Sep 8 - Tue, Sep 16

SEA

Seattle

LCY

London

$592 Roundtrip, just found

$592

Roundtrip

just found

Select KLM flight, departing Mon, Sep 8 from Seattle to London, returning Tue, Sep 16, priced at $592 just found

Wed, Oct 15 - Wed, Oct 22

SEA

Seattle

LCY

London

$592 Roundtrip, found 4 hours ago

$592

Roundtrip

found 4 hours ago

Select KLM flight, departing Wed, Oct 15 from Seattle to London, returning Wed, Oct 22, priced at $592 found 4 hours ago

Mon, Sep 8 - Tue, Sep 16

SEA

Seattle

LCY

London

$618 Roundtrip, just found

$618

Roundtrip

just found

Select KLM flight, departing Mon, Sep 8 from Seattle to London, returning Tue, Sep 16, priced at $618 just found

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle

LCY

London

$618 Roundtrip, found 2 hours ago

$618

Roundtrip

found 2 hours ago

Select KLM flight, departing Wed, Sep 10 from Seattle to London, returning Mon, Sep 15, priced at $618 found 2 hours ago

Wed, Oct 15 - Wed, Oct 22

SEA

Seattle

LCY

London

$628 Roundtrip, found 4 hours ago

$628

Roundtrip

found 4 hours ago

Select KLM flight, departing Wed, Oct 15 from Seattle to London, returning Wed, Oct 22, priced at $628 found 4 hours ago