Ok... I have had a question brewing for some time and now I've finally gotten around to post it so here it goes:
Back in May 2004 my wife and I took a trip to Hawaii on Continental. The plane ride to and from was great however on the trip out (according the map) we never flew over the border into Mexico. Once over the Pacific Ocean we went directly over the Channel Islands and then turned South West towards HNL. Apparently avoiding Mexican airpace. On the way back we went directly over Mexico on a strait shot to IAH.
The flight out was on a Tuesday leaving IAH about 2:00 PM and the flight back was a redeye.
I know this is probably a stupid question but I've been itching to ask it but what is usually required in order to fly over Mexican airspace and why the different flight paths?