Cheap Flights from Chiang Mai to Koh Samui

View €164 flight on Tue, 16 Sep 2025Opens in a new window

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Cheap flights from Chiang Mai to Koh Samui (CNX-USM)

Prices were available within the past 7 days and start at €164 for one-way flights and €331 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bangkok Airways
Tue, 16 Sep - Tue, 23 Sep
CNX
Chiang Mai
USM
Koh Samui
€331 Return, found 16 hours ago
€331
Return
found 16 hours ago
Select Bangkok Airways flight, departing Tue, 16 Sep from Chiang Mai to Koh Samui, returning Tue, 23 Sep, priced at €331 found 16 hours ago
Bangkok Airways
Fri, 12 Sep - Sun, 21 Sep
CNX
Chiang Mai
USM
Koh Samui
€333 Return, found 6 days ago
€333
Return
found 6 days ago
Select Bangkok Airways flight, departing Fri, 12 Sep from Chiang Mai to Koh Samui, returning Sun, 21 Sep, priced at €333 found 6 days ago
Bangkok Airways
Tue, 16 Sep - Tue, 23 Sep
CNX
Chiang Mai
USM
Koh Samui
€334 Return, found 16 hours ago
€334
Return
found 16 hours ago
Select Bangkok Airways flight, departing Tue, 16 Sep from Chiang Mai to Koh Samui, returning Tue, 23 Sep, priced at €334 found 16 hours ago
Bangkok Airways
Fri, 12 Sep - Sun, 21 Sep
CNX
Chiang Mai
USM
Koh Samui
€336 Return, found 6 days ago
€336
Return
found 6 days ago
Select Bangkok Airways flight, departing Fri, 12 Sep from Chiang Mai to Koh Samui, returning Sun, 21 Sep, priced at €336 found 6 days ago
Bangkok Airways
Tue, 16 Sep - Tue, 23 Sep
CNX
Chiang Mai
USM
Koh Samui
€338 Return, found 16 hours ago
€338
Return
found 16 hours ago
Select Bangkok Airways flight, departing Tue, 16 Sep from Chiang Mai to Koh Samui, returning Tue, 23 Sep, priced at €338 found 16 hours ago
Bangkok Airways
Fri, 12 Sep - Sun, 21 Sep
CNX
Chiang Mai
USM
Koh Samui
€340 Return, found 6 days ago
€340
Return
found 6 days ago
Select Bangkok Airways flight, departing Fri, 12 Sep from Chiang Mai to Koh Samui, returning Sun, 21 Sep, priced at €340 found 6 days ago

Find the cheapest month to fly from Chiang Mai (CNX) to Koh Samui (USM)

September is typically the cheapest month to fly

From €158 - €365 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.