Cheap flights from Siem Reap to Koh Samui Islands

View AU$431 flight on Wed, 1 Oct. 2025Opens in a new window

Popular airlines from Siem Reap to Koh Samui Islands

  • Bangkok Airways

    Bangkok Airways

  • Vietnam Airlines

    Vietnam Airlines

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Siem Reap (SAI) 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
Sun, 14 Sep. - Sat, 20 Sep.
SAI
Siem Reap
USM
Koh Samui
AU$861 Return, found 1 day ago
AU$861
Return
found 1 day ago
Select Bangkok Airways flight, departing Sun, 14 Sep. from Siem Reap to Koh Samui, returning Sat, 20 Sep., priced at AU$861 found 1 day ago
Bangkok Airways
Sun, 14 Sep. - Sat, 20 Sep.
SAI
Siem Reap
USM
Koh Samui
AU$869 Return, found 1 day ago
AU$869
Return
found 1 day ago
Select Bangkok Airways flight, departing Sun, 14 Sep. from Siem Reap to Koh Samui, returning Sat, 20 Sep., priced at AU$869 found 1 day ago
Bangkok Airways
Sun, 14 Sep. - Sat, 20 Sep.
SAI
Siem Reap
USM
Koh Samui
AU$886 Return, found 1 day ago
AU$886
Return
found 1 day ago
Select Bangkok Airways flight, departing Sun, 14 Sep. from Siem Reap to Koh Samui, returning Sat, 20 Sep., priced at AU$886 found 1 day ago
Bangkok Airways
Sun, 14 Sep. - Sat, 20 Sep.
SAI
Siem Reap
USM
Koh Samui
AU$892 Return, found 1 day ago
AU$892
Return
found 1 day ago
Select Bangkok Airways flight, departing Sun, 14 Sep. from Siem Reap to Koh Samui, returning Sat, 20 Sep., priced at AU$892 found 1 day ago
Air Cambodia
Sun, 14 Sep. - Sat, 20 Sep.
SAI
Siem Reap
USM
Koh Samui
AU$1,042 Return, found 1 day ago
AU$1,042
Return
found 1 day ago
Select Air Cambodia flight, departing Sun, 14 Sep. from Siem Reap to Koh Samui, returning Sat, 20 Sep., priced at AU$1,042 found 1 day ago
Vietnam Airlines
Sun, 14 Sep. - Sat, 20 Sep.
SAI
Siem Reap
USM
Koh Samui
AU$1,147 Return, found 1 day ago
AU$1,147
Return
found 1 day ago
Select Vietnam Airlines flight, departing Sun, 14 Sep. from Siem Reap to Koh Samui, returning Sat, 20 Sep., priced at AU$1,147 found 1 day ago
*Available to Expedia members.