Flybe look set to be the next airline to launch flights from DSA, the following is listed under their timetable section:
Doncaster - Belfast City
BE264 10:45 - 11:45 - M-Fr
BE264 11:25 - 12:25 - Sa
BE266 17:20 - 18:20 - M-Fr,Su
Belfast City - Doncaster
BE263 09:20 - 10:20 - M-Fr
BE263 10:00 - 11:00 - Sa
BE265 15:55 - 16:55 - M-Fr,Su