Book United London to Seattle flight deals from $407

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Downtown Seattle at sunset

Plan ahead for flights from London to Seattle

from
to
Type
Dates
Price*
London (LHR)
to Seattle (SEA)
Roundtrip
Depart Mon 10 Sep 2018
Return Sun 7 Oct 2018
from$ 407*Viewed: 1 hour ago
London (LHR)
to Seattle (SEA)
Roundtrip
Depart Thu 4 Oct 2018
Return Tue 16 Oct 2018
from$ 407*Viewed: 14 hours ago
London (LHR)
to Seattle (SEA)
Roundtrip
Depart Fri 31 Aug 2018
Return Tue 11 Sep 2018
from$ 412*Viewed: 1 hour ago
London (LHR)
to Seattle (SEA)
Roundtrip
Depart Sun 9 Sep 2018
Return Sat 6 Oct 2018
from$ 412*Viewed: 1 hour ago
*Prices have been available for round trips within the last 48 hours and may not be currently available. Fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

Weather in Seattle

70 °FSaturday06/23/2018
72 °FSunday06/24/2018
63 °FMonday06/25/2018
53 °FTuesday06/26/2018
60 °FWednesday06/27/2018
55 °FThursday06/28/2018
59 °FFriday06/29/2018
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