A radical idea: think Canada

I realize that Canada is always the very last thing you Americans ever think about, but in high season, there are direct flights to Zihua from Montreal and Toronto in the east, and from Calgary and Vancouver in the west. There are plenty of flights to and from most northern US cities into each of those Canadian airports.
So, how about an easy flight from your northern US city into one of those four Canadian airports, stay overnight, where your US dollar is worth about $1.35 Canadian, and get a direct flight to Zihua next day....again using your currency advantage to purchase your Canada-Zihua-direct-return flights?
Am I missing something?

My wife is actually flying from Toronto in Jan. and March.

D