Bangkok (DMK) to Nha Trang (NHA): 595 miles (957 km) great-circle, about 1h 40m nonstop by our estimate. Cheapest fare observed: $165 round-trip on Thai AirAsia, nonstop, departing June 11, 2026.
$165 round-trip, Thai AirAsia FD646, departing 2026-06-11 at 08:00, returning 2026-06-18. The recorded itinerary left on a Thursday, returning on a Thursday 7 nights later; the fare was observed 47 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $165, it ranked 7th of the 30 round-trip fares we recorded from DMK (median $322). That is 27.7 cents per great-circle mile (round-trip price over one-way distance), above the DMK median of 25.1 cents across 30 round-trip routes.
Routes from DMK of similar length: Hanoi (610 mi) at $220 and Da Nang (528 mi) at $157.
Thai AirAsia had the cheapest fare on 12 of 30 DMK routes. It is the 22nd longest of the 30 routes we track from DMK.
Of 17 departure airports with a fare to Nha Trang, Bangkok (DMK) ranked 3rd at $165. Lowest: $109 from Ho Chi Minh City (SGN); highest: $789 from Kathmandu (KTM); 7 nonstop. Cheapest-fare airlines (routes): VietJet Air (4), AirAsia (2), Sichuan Airlines (2), Thai Vietjet Air (2), Vietnam Airlines (2) and Air India (1), plus 4 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Bangkok, Asia/Ho_Chi_Minh; flight time is our estimate.