Cheap flights from London to San Juan Islands

View AU$246 flight on Wed, 10 Sep. 2025Opens in a new window

Popular airlines from London to San Juan Islands

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Cheap Flights from London (YXU) to San Juan Islands (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, 11 Sep. - Sat, 20 Sep.
YHM
Hamilton
SEA
Seattle
AU$513 Return, found 5 days ago
AU$513
Return
found 5 days ago
Select Air Canada flight, departing Thu, 11 Sep. from Hamilton to Seattle, returning Sat, 20 Sep., priced at AU$513 found 5 days ago
WestJet
Sat, 6 Sep. - Sun, 7 Sep.
YHM
Hamilton
SEA
Seattle
AU$608 Return, found 4 days ago
AU$608
Return
found 4 days ago
Select WestJet flight, departing Sat, 6 Sep. from Hamilton to Seattle, returning Sun, 7 Sep., priced at AU$608 found 4 days ago
Air Canada
Sun, 7 Sep. - Mon, 8 Sep.
YHM
Hamilton
SEA
Seattle
AU$637 Return, found 4 days ago
AU$637
Return
found 4 days ago
Select Air Canada flight, departing Sun, 7 Sep. from Hamilton to Seattle, returning Mon, 8 Sep., priced at AU$637 found 4 days ago
WestJet
Thu, 14 Aug. - Tue, 19 Aug.
YHM
Hamilton
SEA
Seattle
AU$663 Return, found 6 days ago
AU$663
Return
found 6 days ago
Select WestJet flight, departing Thu, 14 Aug. from Hamilton to Seattle, returning Tue, 19 Aug., priced at AU$663 found 6 days ago
WestJet
Sun, 7 Sep. - Sun, 14 Sep.
YHM
Hamilton
SEA
Seattle
AU$677 Return, found 8 hours ago
AU$677
Return
found 8 hours ago
Select WestJet flight, departing Sun, 7 Sep. from Hamilton to Seattle, returning Sun, 14 Sep., priced at AU$677 found 8 hours ago
WestJet
Sat, 6 Sep. - Sun, 7 Sep.
YHM
Hamilton
SEA
Seattle
AU$707 Return, found 4 days ago
AU$707
Return
found 4 days ago
Select WestJet flight, departing Sat, 6 Sep. from Hamilton to Seattle, returning Sun, 7 Sep., priced at AU$707 found 4 days ago
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