What you want to find out is which airport they are flying into. If it is Goldson I don't think you will find the pricing to be good as you would like. I don't where else an ATR would land. Much smaller planes landing in San Pedro that would be the ticket.
Well, tickets from LAS to BZE are routinely $600 or more while ticekts to Cancun can be found for under $200. If the Maya flight is priced anywhere under $350 it would still be worth it.