$515 Cheap United flights Seattle (SEA) to London (LHR)

$515 Cheap United flights Seattle (SEA) to London (LHR)

Prices were available within the past 7 days and start at $515 for one-way flights and $703 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Apr 4 - Sat, Apr 18

SEA

Seattle

LHR

London

$703 Roundtrip, found 3 days ago

$703

Roundtrip

found 3 days ago

Select United flight, departing Sat, Apr 4 from Seattle to London, returning Sat, Apr 18, priced at $703 found 3 days ago

Sat, Apr 4 - Sat, Apr 18

SEA

Seattle

LHR

London

$721 Roundtrip, found 3 days ago

$721

Roundtrip

found 3 days ago

Select United flight, departing Sat, Apr 4 from Seattle to London, returning Sat, Apr 18, priced at $721 found 3 days ago

Sat, Apr 4 - Sat, Apr 18

SEA

Seattle

LHR

London

$730 Roundtrip, found 3 days ago

$730

Roundtrip

found 3 days ago

Select United flight, departing Sat, Apr 4 from Seattle to London, returning Sat, Apr 18, priced at $730 found 3 days ago

Sat, Apr 4 - Sat, Apr 18

SEA

Seattle

LHR

London

$773 Roundtrip, found 3 days ago

$773

Roundtrip

found 3 days ago

Select United flight, departing Sat, Apr 4 from Seattle to London, returning Sat, Apr 18, priced at $773 found 3 days ago

Sat, Apr 4 - Sat, Apr 18

SEA

Seattle

LHR

London

$780 Roundtrip, found 3 days ago

$780

Roundtrip

found 3 days ago

Select United flight, departing Sat, Apr 4 from Seattle to London, returning Sat, Apr 18, priced at $780 found 3 days ago