One question I am going back to Mexico my flight leaves from tijuana I can leave San Diego to take my flight in tijuana back

Sepala

Yes, nesesita in Cross Boarder Express ticket

I understand that you can get to the cbx and buy your pass to cross into Mexico which is the same as when you want to go to the USA, but usually when you buy your flight it gives you the option to buy it, I did it that way when I came back to Mexico, check your page and speak for more information

Your reservation specifies both your departure airport and destination. If you bought with an option for rerouting and / or date, you should contact the airline to request changes require