Cheap Flights from Chiang Mai to Koh Samui

View €178 flight on Tue, 28 Oct 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 €178 for one-way flights and €359 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bangkok Airways
Tue, 2 Jun - Mon, 15 Jun
CNX
Chiang Mai
USM
Koh Samui
€359 Return, found 2 days ago
€359
Return
found 2 days ago
Select Bangkok Airways flight, departing Tue, 2 Jun from Chiang Mai to Koh Samui, returning Mon, 15 Jun, priced at €359 found 2 days ago
Bangkok Airways
Wed, 29 Oct - Fri, 31 Oct
CNX
Chiang Mai
USM
Koh Samui
€362 Return, found 6 days ago
€362
Return
found 6 days ago
Select Bangkok Airways flight, departing Wed, 29 Oct from Chiang Mai to Koh Samui, returning Fri, 31 Oct, priced at €362 found 6 days ago
Bangkok Airways
Thu, 11 Sep - Sun, 14 Sep
CNX
Chiang Mai
USM
Koh Samui
€367 Return, found 1 hour ago
€367
Return
found 1 hour ago
Select Bangkok Airways flight, departing Thu, 11 Sep from Chiang Mai to Koh Samui, returning Sun, 14 Sep, priced at €367 found 1 hour ago
Bangkok Airways
Mon, 8 Sep - Mon, 15 Sep
CNX
Chiang Mai
USM
Koh Samui
€369 Return, found 4 days ago
€369
Return
found 4 days ago
Select Bangkok Airways flight, departing Mon, 8 Sep from Chiang Mai to Koh Samui, returning Mon, 15 Sep, priced at €369 found 4 days ago
Bangkok Airways
Thu, 11 Sep - Sun, 14 Sep
CNX
Chiang Mai
USM
Koh Samui
€370 Return, found 1 hour ago
€370
Return
found 1 hour ago
Select Bangkok Airways flight, departing Thu, 11 Sep from Chiang Mai to Koh Samui, returning Sun, 14 Sep, priced at €370 found 1 hour ago
Bangkok Airways
Mon, 8 Sep - Mon, 15 Sep
CNX
Chiang Mai
USM
Koh Samui
€372 Return, found 4 days ago
€372
Return
found 4 days ago
Select Bangkok Airways flight, departing Mon, 8 Sep from Chiang Mai to Koh Samui, returning Mon, 15 Sep, priced at €372 found 4 days ago

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

June is typically the cheapest month to fly

From €158 - €357 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.