Do you HAVE to travel on both Sundays? Any options to go Monday, return Tuesday? Also DTW must have a lot of folks going to MBJ, cuz there are few options open to ya and expensive (I'm looking at Airtran's site). If you could go Monday and return Tuesday, about $436.

PLUS, that's a crummy time to leave , so early in the morning on your return.

Do fares still commonly change 1am Wed mornings?

Good luck!