Flights to Koh Samui from San Francisco - ￥74,250

View ￥74,250 flight on Sat, Apr 11, 2026Opens in a new window

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Cheap Flights from San Francisco to Koh Samui (SJC-USM)

Prices were available within the past 7 days and start at ￥74,250 for one-way flights and ￥112,810 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Nov 23 - Thu, Nov 27
SFO
San Francisco
USM
Koh Samui
￥112,810 Roundtrip, found 18 hours ago
￥112,810
Roundtrip
found 18 hours ago
Select United flight, departing Sun, Nov 23 from San Francisco to Koh Samui, returning Thu, Nov 27, priced at ￥112,810 found 18 hours ago
United
Sun, Nov 23 - Thu, Nov 27
SFO
San Francisco
USM
Koh Samui
￥113,410 Roundtrip, found 18 hours ago
￥113,410
Roundtrip
found 18 hours ago
Select United flight, departing Sun, Nov 23 from San Francisco to Koh Samui, returning Thu, Nov 27, priced at ￥113,410 found 18 hours ago
Qatar Airways
Sat, Nov 22 - Thu, Nov 27
SFO
San Francisco
USM
Koh Samui
￥256,280 Roundtrip, found 18 hours ago
￥256,280
Roundtrip
found 18 hours ago
Select Qatar Airways flight, departing Sat, Nov 22 from San Francisco to Koh Samui, returning Thu, Nov 27, priced at ￥256,280 found 18 hours ago
Emirates
Sun, Nov 23 - Thu, Nov 27
SFO
San Francisco
USM
Koh Samui
￥263,640 Roundtrip, found 18 hours ago
￥263,640
Roundtrip
found 18 hours ago
Select Emirates flight, departing Sun, Nov 23 from San Francisco to Koh Samui, returning Thu, Nov 27, priced at ￥263,640 found 18 hours ago
KLM
Sun, Nov 23 - Thu, Nov 27
SFO
San Francisco
USM
Koh Samui
￥303,340 Roundtrip, found 18 hours ago
￥303,340
Roundtrip
found 18 hours ago
Select KLM flight, departing Sun, Nov 23 from San Francisco to Koh Samui, returning Thu, Nov 27, priced at ￥303,340 found 18 hours ago
Air France
Sat, Nov 22 - Sat, Nov 29
SFO
San Francisco
USM
Koh Samui
￥332,010 Roundtrip, found 18 hours ago
￥332,010
Roundtrip
found 18 hours ago
Select Air France flight, departing Sat, Nov 22 from San Francisco to Koh Samui, returning Sat, Nov 29, priced at ￥332,010 found 18 hours ago

Find the cheapest month to fly from San Francisco (SFO) to Koh Samui (USM)

September is typically the cheapest month to fly

From ￥121,737 - ￥172,928 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.