Are there nonstop flights from Niš (INI) to Bucharest (OTP)?

No. The fastest connection is via Belgrade, about 1h 47m of total flying time.

What is the fastest connection from Niš (INI) to Bucharest (OTP)?

via Belgrade ≈ 1h 47m, via Istanbul ≈ 2h 13m (estimated flying time, excluding layovers).

Niš Constantine the Great Airport (INI) to Bucharest Henri Coandă International Airport (OTP)・367 km

No nonstop flights. The fastest connection is via Belgrade (BEG), about 1h 47m of flying time (layover not included).

None.

2 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

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