BWI to CUN on Southwest is $360 RT with two bags for Jan-March booking now. It is non stop, too
That isn't bad at all. That is my old Airtran flight.
I need to book December. I have to figure out how to use my Airtran credits for SW points or whatever. I moved them all and then the credits didn't get used when I point booked September. I called SW and the nice lady at regular service said I needed to talk to international. International said you can't use them international and you cant move them back to airtran and you are going to lose the ones that expire before the November conversion. Then she tried to tell me to call Airtran, even though everything was in SW. That seems to be BS, so I tried to move them BACK to airtran and they moved fine. So I send an email to see if I can get someone who KNOWS how it works so I don't lose them.