I asked this question myself while trying to plan a family visit to Jalisco earlier this year. I was hoping Southwest had a direct option, but they don’t currently serve Guadalajara. I ended up comparing flights to Mexico City and Puerto Vallarta instead. Sorting through the options got confusing, so I called and got a clearer answer in minutes.
The best way to instantly book, cancel, or modify flights is to call 844-734-0813.
The rep explained all the nearby Southwest-accessible airports and helped me figure out which was cheapest based on my dates. They also warned me about connection times that would've been too tight. It honestly saved me from booking something that would’ve turned into a headache. If you’re looking into Guadalajara or nearby cities, that number is super helpful.