Cheap Flights from Chiang Mai to Koh Samui Islands: CNX→USM from HK$1,514

View HK$1,514 flight on Fri, 5 Sep 2025Opens in a new window

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Find Cheap Flights from Chiang Mai (CNX) to Koh Samui Islands (USM)

Prices were available within the past 7 days and start at HK$1,514 for one-way flights and HK$1,445 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bangkok Airways
Thu, 9 Oct - Fri, 17 Oct
CNX
Chiang Mai
USM
Koh Samui
HK$1,445 Return, found 5 days ago
HK$1,445
Return
found 5 days ago
Select Bangkok Airways flight, departing Thu, 9 Oct from Chiang Mai to Koh Samui, returning Fri, 17 Oct, priced at HK$1,445 found 5 days ago
Bangkok Airways
Thu, 16 Oct - Wed, 22 Oct
CNX
Chiang Mai
USM
Koh Samui
HK$1,455 Return, found 4 days ago
HK$1,455
Return
found 4 days ago
Select Bangkok Airways flight, departing Thu, 16 Oct from Chiang Mai to Koh Samui, returning Wed, 22 Oct, priced at HK$1,455 found 4 days ago
Bangkok Airways
Thu, 16 Oct - Wed, 22 Oct
CNX
Chiang Mai
USM
Koh Samui
HK$2,225 Return, found 4 days ago
HK$2,225
Return
found 4 days ago
Select Bangkok Airways flight, departing Thu, 16 Oct from Chiang Mai to Koh Samui, returning Wed, 22 Oct, priced at HK$2,225 found 4 days ago
Bangkok Airways
Thu, 16 Oct - Wed, 22 Oct
CNX
Chiang Mai
USM
Koh Samui
HK$2,257 Return, found 4 days ago
HK$2,257
Return
found 4 days ago
Select Bangkok Airways flight, departing Thu, 16 Oct from Chiang Mai to Koh Samui, returning Wed, 22 Oct, priced at HK$2,257 found 4 days ago
Bangkok Airways
Thu, 16 Oct - Wed, 22 Oct
CNX
Chiang Mai
USM
Koh Samui
HK$2,445 Return, found 4 days ago
HK$2,445
Return
found 4 days ago
Select Bangkok Airways flight, departing Thu, 16 Oct from Chiang Mai to Koh Samui, returning Wed, 22 Oct, priced at HK$2,445 found 4 days ago
Bangkok Airways
Thu, 16 Oct - Wed, 22 Oct
CNX
Chiang Mai
USM
Koh Samui
HK$2,477 Return, found 4 days ago
HK$2,477
Return
found 4 days ago
Select Bangkok Airways flight, departing Thu, 16 Oct from Chiang Mai to Koh Samui, returning Wed, 22 Oct, priced at HK$2,477 found 4 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 HK$1,435 - HK$3,288 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.