Argh! I just got off the phone with booking site and airline, and it looks as if my options for getting to and from Cozumel have just worsened significantly.
I mostly live in New Hampshire, not at all far from Manchester airport (MHT), which has easy traffic, quick and inexpensive parking, is close enough for parents or friends to drop us off and pick us up, and is in every way preferable to using Logan airport (BOS) in Boston. I have an upcoming flight and just had a schedule change so I have 77 minutes to make a connection in Atlanta (ATL) on the way back from Cozumel. No problem at all - I have Global Entry and travel with only a small carry-on, so at ATL it's never taken me more than 40 minutes from wheels-down to being at my departure gate. The airline thinks it's physically impossible to make the connection in less than 85 minutes, so they want to have me stay overnight and take the same flight to MHT the following day. I think I've talked them into letting me take the (tiny) risk of missing the connection this time.
The really disappointing bit is that looking ahead on Google's ITA Matrix site, there aren't currently any "valid" itineraries that will get me from MHT to CZM and back. The only options involve leaving from BOS, flying in to CUN, or, worst of all, both. I actually don't mind flying in to CUN but I detest leaving from there.
Since airlines change their schedules constantly, this may very well change in the future but for now the compromises that people living in this part of the country will need to make to get to Cozumel have just increased.