Cheap flights from Seattle to Koh Samui from CA $806

View CA $806 flight on Mon, Nov. 3, 2025Opens in a new window

Popular airlines from Seattle to Koh Samui

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Cheap flights from Seattle (SEA) to Koh Samui (USM)

Prices were available within the past 7 days and start at CA $806 for one-way flights and CA $1,460 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Tue., Nov. 4 - Mon., Nov. 10
SEA
Seattle
USM
Koh Samui
CA $1,460 Roundtrip, found 23 hours ago
CA $1,460
Roundtrip
found 23 hours ago
Select Singapore Airlines flight, departing Tue., Nov. 4 from Seattle to Koh Samui, returning Mon., Nov. 10, priced at CA $1,460 found 23 hours ago
EVA Airways
Tue., Nov. 4 - Mon., Nov. 10
SEA
Seattle
USM
Koh Samui
CA $1,474 Roundtrip, found 23 hours ago
CA $1,474
Roundtrip
found 23 hours ago
Select EVA Airways flight, departing Tue., Nov. 4 from Seattle to Koh Samui, returning Mon., Nov. 10, priced at CA $1,474 found 23 hours ago
China Airlines
Mon., Apr. 28 - Mon., May 26
SEA
Seattle
USM
Koh Samui
CA $1,661 Roundtrip, found 2 days ago
CA $1,661
Roundtrip
found 2 days ago
Select China Airlines flight, departing Mon., Apr. 28 from Seattle to Koh Samui, returning Mon., May 26, priced at CA $1,661 found 2 days ago
Qatar Airways
Mon., Nov. 3 - Sun., Nov. 9
SEA
Seattle
USM
Koh Samui
CA $1,691 Roundtrip, found 3 days ago
CA $1,691
Roundtrip
found 3 days ago
Select Qatar Airways flight, departing Mon., Nov. 3 from Seattle to Koh Samui, returning Sun., Nov. 9, priced at CA $1,691 found 3 days ago
Turkish Airlines
Mon., Nov. 3 - Sun., Nov. 9
SEA
Seattle
USM
Koh Samui
CA $1,773 Roundtrip, found 3 days ago
CA $1,773
Roundtrip
found 3 days ago
Select Turkish Airlines flight, departing Mon., Nov. 3 from Seattle to Koh Samui, returning Sun., Nov. 9, priced at CA $1,773 found 3 days ago
Emirates
Tue., Nov. 4 - Mon., Nov. 10
SEA
Seattle
USM
Koh Samui
CA $2,334 Roundtrip, found 23 hours ago
CA $2,334
Roundtrip
found 23 hours ago
Select Emirates flight, departing Tue., Nov. 4 from Seattle to Koh Samui, returning Mon., Nov. 10, priced at CA $2,334 found 23 hours ago
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