$403 Cheap United flights Seattle (SEA) to London (LHR)

$403 Cheap United flights Seattle (SEA) to London (LHR)

Prices were available within the past 7 days and start at $403 for one-way flights and $649 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Feb 10 - Tue, Feb 24

SEA

Seattle

LHR

London

$649 Roundtrip, found 1 day ago

$649

Roundtrip

found 1 day ago

Select United flight, departing Tue, Feb 10 from Seattle to London, returning Tue, Feb 24, priced at $649 found 1 day ago

Tue, Feb 10 - Tue, Feb 24

SEA

Seattle

LHR

London

$653 Roundtrip, found 1 day ago

$653

Roundtrip

found 1 day ago

Select United flight, departing Tue, Feb 10 from Seattle to London, returning Tue, Feb 24, priced at $653 found 1 day ago

Tue, Feb 10 - Tue, Feb 24

SEA

Seattle

LHR

London

$654 Roundtrip, found 1 day ago

$654

Roundtrip

found 1 day ago

Select United flight, departing Tue, Feb 10 from Seattle to London, returning Tue, Feb 24, priced at $654 found 1 day ago

Tue, Sep 9 - Fri, Sep 19

SEA

Seattle

LHR

London

$656 Roundtrip, found 21 hours ago

$656

Roundtrip

found 21 hours ago

Select United flight, departing Tue, Sep 9 from Seattle to London, returning Fri, Sep 19, priced at $656 found 21 hours ago

Tue, Feb 10 - Tue, Feb 24

SEA

Seattle

LHR

London

$657 Roundtrip, found 1 day ago

$657

Roundtrip

found 1 day ago

Select United flight, departing Tue, Feb 10 from Seattle to London, returning Tue, Feb 24, priced at $657 found 1 day ago

Tue, Feb 10 - Tue, Feb 24

SEA

Seattle

LHR

London

$659 Roundtrip, found 1 day ago

$659

Roundtrip

found 1 day ago

Select United flight, departing Tue, Feb 10 from Seattle to London, returning Tue, Feb 24, priced at $659 found 1 day ago

Tue, Sep 9 - Fri, Sep 19

SEA

Seattle

LHR

London

$668 Roundtrip, found 21 hours ago

$668

Roundtrip

found 21 hours ago

Select United flight, departing Tue, Sep 9 from Seattle to London, returning Fri, Sep 19, priced at $668 found 21 hours ago

Tue, Sep 9 - Fri, Sep 19

SEA

Seattle

LHR

London

$678 Roundtrip, found 21 hours ago

$678

Roundtrip

found 21 hours ago

Select United flight, departing Tue, Sep 9 from Seattle to London, returning Fri, Sep 19, priced at $678 found 21 hours ago

Tue, Sep 9 - Fri, Sep 19

SEA

Seattle

LHR

London

$680 Roundtrip, found 21 hours ago

$680

Roundtrip

found 21 hours ago

Select United flight, departing Tue, Sep 9 from Seattle to London, returning Fri, Sep 19, priced at $680 found 21 hours ago

Tue, Feb 10 - Tue, Feb 24

SEA

Seattle

LHR

London

$681 Roundtrip, found 1 day ago

$681

Roundtrip

found 1 day ago

Select United flight, departing Tue, Feb 10 from Seattle to London, returning Tue, Feb 24, priced at $681 found 1 day ago