Are there nonstop flights from Unalaska (DUT) to Nikolski (IKO)?

Yes. Grant Aviation fly this route. Flight time is about 43m.

Unalaska → Nikolski

Tom Madsen (Dutch Harbor) Airport (DUT) to Nikolski Air Station (IKO)・186 km

Nonstop flights available (1 airline). Flight time about 43m. Nonstop return flights also operate.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.