Word travels and eventually they go out of business. If they're doing that, they're doing that to a lot of people. You honestly think there is a scam going on? Wouldn't Aeromexico benefit from all travelers being happy and willing to fly with it again? Say, they get an extra couple hundred dollars out of you by 'scamming' you. #8, you can't just throw unsubstantiated claims around like that.

You will arrive as a domestic passenger and won't have to worry about anything until you arrive in Las Vegas. If everything is on time, you should be able to make it if you hustle. If you don't speak Spanish and have questions, everyone we encountered spoke excellent English. Everything was well-marked and easy to follow. The gate agent simply pulled them apart as we boarded - super easy. The ticketing agent in Cancun stapled our tourist cards to our boarding passes. Our bags were checked straight through and after we disembarked, all we had to do was walk to the next gate. With that said, it was a super easy transition in Mexico City. Returning was at least 30 minutes in Cancun and probably another 45 minutes in Mexico City. We sat on the tarmac in Mexico City en route to Cancun for almost an hour. Our recent experience with Aeromexico was that the flight was perfectly on time leaving from Boston - we actually pulled away from the gate early - but every other flight was delayed. Use something like flight aware to find out whether or not your flight tends to run on time.

Mexico city airport connecting flights