Well, I have 2 choices out of Minneapolis, Sun Country or Delta. I usually go with Delta, and I book when it 's around 600.00. It never gets much cheaper than that for non stop. You should be able to find a little cheaper out of OHare, again, I have found October to be a good time.
I stay at the White Sands. ( right next to Nirvana.) I think it's bar far the best value on the beach. It's popular with a lot of boardies !!