Cheap flights from Chiang Mai to Koh Samui Islands

View AU$142 flight on Thu, 9 Oct. 2025Opens in a new window

Popular airlines from Chiang Mai to Koh Samui Islands

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    United

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

Bangkok Airways
Mon, 18 May - Sun, 24 May
CNX
Chiang Mai
USM
Koh Samui
AU$292 Return, found 5 days ago
AU$292
Return
found 5 days ago
Select Bangkok Airways flight, departing Mon, 18 May from Chiang Mai to Koh Samui, returning Sun, 24 May, priced at AU$292 found 5 days ago
Bangkok Airways
Wed, 8 Oct. - Sun, 12 Oct.
CNX
Chiang Mai
USM
Koh Samui
AU$308 Return, found 4 days ago
AU$308
Return
found 4 days ago
Select Bangkok Airways flight, departing Wed, 8 Oct. from Chiang Mai to Koh Samui, returning Sun, 12 Oct., priced at AU$308 found 4 days ago
Bangkok Airways
Wed, 8 Oct. - Sun, 12 Oct.
CNX
Chiang Mai
USM
Koh Samui
AU$314 Return, found 4 days ago
AU$314
Return
found 4 days ago
Select Bangkok Airways flight, departing Wed, 8 Oct. from Chiang Mai to Koh Samui, returning Sun, 12 Oct., priced at AU$314 found 4 days ago
Bangkok Airways
Mon, 18 May - Sun, 24 May
CNX
Chiang Mai
USM
Koh Samui
AU$409 Return, found 5 days ago
AU$409
Return
found 5 days ago
Select Bangkok Airways flight, departing Mon, 18 May from Chiang Mai to Koh Samui, returning Sun, 24 May, priced at AU$409 found 5 days ago
Bangkok Airways
Mon, 18 May - Sun, 24 May
CNX
Chiang Mai
USM
Koh Samui
AU$415 Return, found 5 days ago
AU$415
Return
found 5 days ago
Select Bangkok Airways flight, departing Mon, 18 May from Chiang Mai to Koh Samui, returning Sun, 24 May, priced at AU$415 found 5 days ago
Bangkok Airways
Mon, 18 May - Sun, 24 May
CNX
Chiang Mai
USM
Koh Samui
AU$425 Return, found 5 days ago
AU$425
Return
found 5 days ago
Select Bangkok Airways flight, departing Mon, 18 May from Chiang Mai to Koh Samui, returning Sun, 24 May, priced at AU$425 found 5 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 AU$280 - AU$641 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.