Two comments: if you go to migraciones, DO NOT COME early. This way y will not have to wait. If you come at noon or around it, you will have no wait, lines, etc., and will be attended right away (have done it twice). Or, to avoid the hassle whatsoever, do not go anywhere at all. Just come to airport 0 minutes earlier and you will pay exactly hte ame amunt ( 3oo pesos) to the expired visa