Bali (DPS) to Koh Samui (USM): 1,636 miles (2,634 km) great-circle, about 3h 45m nonstop by our estimate. Cheapest fare observed: $413 round-trip on AirAsia, with 2 stops, departing May 25, 2026.
$413 round-trip, AirAsia AK379, departing 2026-05-25 at 19:45, returning 2026-06-06. The recorded itinerary left on a Monday, returning on a Saturday 12 nights later; the fare was observed 30 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $413, it ranked 19th of the 30 round-trip fares we recorded from DPS (median $382). That is 25.2 cents per great-circle mile (round-trip price over one-way distance), above the DPS median of 15.5 cents across 29 round-trip routes.
Routes from DPS of similar length: Phuket (1,644 mi) at $216 and Da Nang (1,778 mi) at $274.
AirAsia had the cheapest fare on 4 of 30 DPS routes. It is the 22nd longest of the 30 routes we track from DPS.
Of 5 departure airports with a fare to Koh Samui, Bali (DPS) ranked 5th at $413. Lowest: $171 from Phuket (HKT); highest: $413 from Bali (DPS); 4 nonstop. Cheapest-fare airlines (routes): Bangkok Airways (3), AirAsia (1) and Scoot (1).
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Makassar, Asia/Bangkok; flight time is our estimate.