Cheap flights from Sihanoukville to Koh Samui

View AU$398 flight on Tue, 2 Sep. 2025Opens in a new window

Popular airlines from Sihanoukville to Koh Samui

  • 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 Sihanoukville (PNH) to Koh Samui (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.

Thai Airways International
Sun, 31 Aug. - Sat, 6 Sep.
PNH
Phnom Penh
USM
Koh Samui
AU$729 Return, found 2 days ago
AU$729
Return
found 2 days ago
Select Thai Airways International flight, departing Sun, 31 Aug. from Phnom Penh to Koh Samui, returning Sat, 6 Sep., priced at AU$729 found 2 days ago
Thai Airways International
Sun, 31 Aug. - Sat, 6 Sep.
PNH
Phnom Penh
USM
Koh Samui
AU$792 Return, found 2 days ago
AU$792
Return
found 2 days ago
Select Thai Airways International flight, departing Sun, 31 Aug. from Phnom Penh to Koh Samui, returning Sat, 6 Sep., priced at AU$792 found 2 days ago
Bangkok Airways
Sun, 31 Aug. - Sat, 6 Sep.
PNH
Phnom Penh
USM
Koh Samui
AU$817 Return, found 2 days ago
AU$817
Return
found 2 days ago
Select Bangkok Airways flight, departing Sun, 31 Aug. from Phnom Penh to Koh Samui, returning Sat, 6 Sep., priced at AU$817 found 2 days ago
Air Cambodia
Fri, 19 Sep. - Tue, 23 Sep.
PNH
Phnom Penh
USM
Koh Samui
AU$882 Return, found 6 days ago
AU$882
Return
found 6 days ago
Select Air Cambodia flight, departing Fri, 19 Sep. from Phnom Penh to Koh Samui, returning Tue, 23 Sep., priced at AU$882 found 6 days ago
Vietnam Airlines
Sun, 31 Aug. - Sat, 6 Sep.
PNH
Phnom Penh
USM
Koh Samui
AU$1,035 Return, found 2 days ago
AU$1,035
Return
found 2 days ago
Select Vietnam Airlines flight, departing Sun, 31 Aug. from Phnom Penh to Koh Samui, returning Sat, 6 Sep., priced at AU$1,035 found 2 days ago
Malaysia Airlines
Fri, 19 Sep. - Tue, 23 Sep.
PNH
Phnom Penh
USM
Koh Samui
AU$1,319 Return, found 6 days ago
AU$1,319
Return
found 6 days ago
Select Malaysia Airlines flight, departing Fri, 19 Sep. from Phnom Penh to Koh Samui, returning Tue, 23 Sep., priced at AU$1,319 found 6 days ago
*Available to Expedia members.