Cheap flights from Mill Valley to Koh Samui

View AU$657 flight on Fri, 26 Sep. 2025Opens in a new window

Popular airlines from Mill Valley to Koh Samui

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Cheap Flights from Mill Valley (OAK) to Koh Samui (USM)

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.

United
Tue, 23 Sep. - Wed, 1 Oct.
SFO
San Francisco
USM
Koh Samui
AU$1,178 Return, found 22 hours ago
AU$1,178
Return
found 22 hours ago
Select United flight, departing Tue, 23 Sep. from San Francisco to Koh Samui, returning Wed, 1 Oct., priced at AU$1,178 found 22 hours ago
United
Tue, 23 Sep. - Fri, 3 Oct.
SFO
San Francisco
USM
Koh Samui
AU$1,185 Return, found 22 hours ago
AU$1,185
Return
found 22 hours ago
Select United flight, departing Tue, 23 Sep. from San Francisco to Koh Samui, returning Fri, 3 Oct., priced at AU$1,185 found 22 hours ago
Singapore Airlines
Sun, 23 Nov. - Mon, 1 Dec.
SFO
San Francisco
USM
Koh Samui
AU$1,477 Return, found 7 hours ago
AU$1,477
Return
found 7 hours ago
Select Singapore Airlines flight, departing Sun, 23 Nov. from San Francisco to Koh Samui, returning Mon, 1 Dec., priced at AU$1,477 found 7 hours ago
EVA Airways
Sun, 23 Nov. - Mon, 1 Dec.
SFO
San Francisco
USM
Koh Samui
AU$1,692 Return, found 7 hours ago
AU$1,692
Return
found 7 hours ago
Select EVA Airways flight, departing Sun, 23 Nov. from San Francisco to Koh Samui, returning Mon, 1 Dec., priced at AU$1,692 found 7 hours ago
China Airlines
Sun, 23 Nov. - Mon, 1 Dec.
SFO
San Francisco
USM
Koh Samui
AU$1,730 Return, found 7 hours ago
AU$1,730
Return
found 7 hours ago
Select China Airlines flight, departing Sun, 23 Nov. from San Francisco to Koh Samui, returning Mon, 1 Dec., priced at AU$1,730 found 7 hours ago
Qatar Airways
Sun, 23 Nov. - Mon, 1 Dec.
SFO
San Francisco
USM
Koh Samui
AU$2,468 Return, found 7 hours ago
AU$2,468
Return
found 7 hours ago
Select Qatar Airways flight, departing Sun, 23 Nov. from San Francisco to Koh Samui, returning Mon, 1 Dec., priced at AU$2,468 found 7 hours ago

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

August is typically the cheapest month to fly

From AU$1,192 - AU$3,012 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.