Cheap flights from Seattle to Koh Samui from CA $994

View CA $994 flight on Fri, Aug. 8, 2025Opens in a new window

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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 $994 for one-way flights and CA $1,931 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

EVA Airways
Mon., Aug. 11 - Thu., Aug. 14
SEA
Seattle
USM
Koh Samui
CA $1,931 Roundtrip, found 2 days ago
CA $1,931
Roundtrip
found 2 days ago
Select EVA Airways flight, departing Mon., Aug. 11 from Seattle to Koh Samui, returning Thu., Aug. 14, priced at CA $1,931 found 2 days ago
EVA Airways
Sat., Aug. 9 - Tue., Aug. 12
SEA
Seattle
USM
Koh Samui
CA $1,988 Roundtrip, found 2 days ago
CA $1,988
Roundtrip
found 2 days ago
Select EVA Airways flight, departing Sat., Aug. 9 from Seattle to Koh Samui, returning Tue., Aug. 12, priced at CA $1,988 found 2 days ago
Qatar Airways
Fri., Aug. 8 - Fri., Aug. 15
SEA
Seattle
USM
Koh Samui
CA $2,560 Roundtrip, found 2 days ago
CA $2,560
Roundtrip
found 2 days ago
Select Qatar Airways flight, departing Fri., Aug. 8 from Seattle to Koh Samui, returning Fri., Aug. 15, priced at CA $2,560 found 2 days ago
Singapore Airlines
Fri., Aug. 8 - Fri., Aug. 15
SEA
Seattle
USM
Koh Samui
CA $2,564 Roundtrip, found 2 days ago
CA $2,564
Roundtrip
found 2 days ago
Select Singapore Airlines flight, departing Fri., Aug. 8 from Seattle to Koh Samui, returning Fri., Aug. 15, priced at CA $2,564 found 2 days ago
Cathay Pacific
Fri., Aug. 8 - Fri., Aug. 15
SEA
Seattle
USM
Koh Samui
CA $3,120 Roundtrip, found 2 days ago
CA $3,120
Roundtrip
found 2 days ago
Select Cathay Pacific flight, departing Fri., Aug. 8 from Seattle to Koh Samui, returning Fri., Aug. 15, priced at CA $3,120 found 2 days ago
Turkish Airlines
Fri., Aug. 8 - Fri., Aug. 15
SEA
Seattle
USM
Koh Samui
CA $3,322 Roundtrip, found 2 days ago
CA $3,322
Roundtrip
found 2 days ago
Select Turkish Airlines flight, departing Fri., Aug. 8 from Seattle to Koh Samui, returning Fri., Aug. 15, priced at CA $3,322 found 2 days ago
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