Cheap Flights from Chiang Mai to Koh Samui

View €165 flight on Tue, 9 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 €165 for one-way flights and €358 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bangkok Airways
Sat, 20 Sep - Sun, 21 Sep
CNX
Chiang Mai
USM
Koh Samui
€358 Return, found 10 hours ago
€358
Return
found 10 hours ago
Select Bangkok Airways flight, departing Sat, 20 Sep from Chiang Mai to Koh Samui, returning Sun, 21 Sep, priced at €358 found 10 hours ago
Bangkok Airways
Sat, 20 Sep - Sun, 21 Sep
CNX
Chiang Mai
USM
Koh Samui
€361 Return, found 10 hours ago
€361
Return
found 10 hours ago
Select Bangkok Airways flight, departing Sat, 20 Sep from Chiang Mai to Koh Samui, returning Sun, 21 Sep, priced at €361 found 10 hours ago
Bangkok Airways
Sat, 20 Sep - Sun, 21 Sep
CNX
Chiang Mai
USM
Koh Samui
€365 Return, found 10 hours ago
€365
Return
found 10 hours ago
Select Bangkok Airways flight, departing Sat, 20 Sep from Chiang Mai to Koh Samui, returning Sun, 21 Sep, priced at €365 found 10 hours ago
Bangkok Airways
Sat, 20 Sep - Sun, 21 Sep
CNX
Chiang Mai
USM
Koh Samui
€367 Return, found 10 hours ago
€367
Return
found 10 hours ago
Select Bangkok Airways flight, departing Sat, 20 Sep from Chiang Mai to Koh Samui, returning Sun, 21 Sep, priced at €367 found 10 hours ago
Bangkok Airways
Sat, 17 Jan - Sat, 7 Feb
CNX
Chiang Mai
USM
Koh Samui
€369 Return, found 3 days ago
€369
Return
found 3 days ago
Select Bangkok Airways flight, departing Sat, 17 Jan from Chiang Mai to Koh Samui, returning Sat, 7 Feb, priced at €369 found 3 days ago
Bangkok Airways
Sat, 20 Sep - Sun, 21 Sep
CNX
Chiang Mai
USM
Koh Samui
€370 Return, found 10 hours ago
€370
Return
found 10 hours ago
Select Bangkok Airways flight, departing Sat, 20 Sep from Chiang Mai to Koh Samui, returning Sun, 21 Sep, priced at €370 found 10 hours 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 - €366 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.