Yes, there are multiple flights from Chiang Mai to Ukraine for under ฿ 27,017. The cheapest flight booked recently is on Qatar Airways for just ฿ 25,906, but on average you can expect to pay ฿ 34,282.
There are no direct flights from Chiang Mai to Ukraine, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
There are currently 2+ open flights from Chiang Mai to Ukraine within the next 7 days for less than ฿ 30,019.
The most popular route from Chiang Mai to Ukraine is Chiang Mai - Kyiv Boryspil Intl. You may also consider Chiang Mai - Lviv Danylo Halytskyi Intl or Chiang Mai - Odesa Intl.
Qatar Airways, Austrian Airlines, and Emirates can get you from Chiang Mai to Ukraine in just under 20h 50m. Your travel time can differ by up to 1h 45m. Both multi-stop and direct flights can be found to your destination and back.
Flying on Qatar Airways is currently your cheapest option to Ukraine, with prices starting at ฿ 25,907. Additional return tickets that might be worth considering are offered by Emirates and Austrian Airlines, with the lowest prices starting at ฿ 26,807 and ฿ 45,870, respectively.