I'm a F/A with UAL, Soon to be applying with many regionals, however, I can guarantee you that with all of our F/A & Pilot MSP Commuters, that you would probably get the jumpseat maybe max 7-10% of the time, and only get an open seat in the back on the last flight of the night from MSP to ORD......going ORD-MSP, very hard on the last flight of the night to get a seat on, but we have flights almost every hour, so you might get on mid-day timeframe...........best of luck........