Originally Posted by knope2001

I can add another one which may or may not matter much to you. Depending on exactly when you move and start flying, you may run into residual issues from integration. For example, if you already have a FF number and online profile at midwestairlines.com, today frontierairilnes.com does not yet recognize it. So for example if you book a trip in November on Frontier, you can't today log in with your midwestairlines.com log on to manage your reservation. You've already been able to earn miles across both programs for several months, but until they are fully a single program...which should come soon...there are these kinds of issues.

Many of the integration issues are targeted for completion before the end of the year, so points of occasional frustration for those of us in transition (like online check-in not available if you book a flight as the "other" airline than it is primarily sold as, or not being able to book award travel online for the "other" airline) should be gone soon. For people starting fresh as new Frontier customers, those are not really issues. But if you have a legacy relationship tied to Midwest like a FF account or online profile, that integration is still in the works for this fall.