Push on Orbitz to figure it out. Flights are routinely cancelled and this should not be a big deal, but may require some flexibility on your part.

If it were me and 20 years ago, I'd miss the first day of classes (unless you are the teacher). I never went to class until the last day of drop-add anyway. How important can those first few weeks be if others can just jump in at that late date? Beside, you're still going to end up hanging out on High Street (I assume you're at OSU) and pulling all-nighters before cramming for the final. Enjoy a few extra days. Life is short.