Flight from Mex City to Zihuatanejo

We will be spending New Years Eve in Mexico city and two more nights then flying on to Z on Jan 3rd. I notice there are 4 different airlines listed with 5 flights the prices are $66 CAD to $89 CAD each. Interjet and Volaris have the best timing for check in, any preference?

As a side note they are all non stop flights however the listings show a difference of 55 minutes to 1 hr 25 min.

Should be more than 4 different? Aeromar, and of course Aeromex. Also there is a flight coming from an outskirts airport of Mex City.

Dave