Used to be the only ways to get to Mexico were to sign on for some cheesy tour or sit at the Colorado Boulevard on-ramp to I-25 South with a "Mexico or Bust" sign, a handful of pesos and a willingness to do anything the trucker who picked you up demanded. Anything. A few selective-memory blackouts and a couple of burro rides later, you were smack-dab in the heart of Mexico City. Okay, maybe getting to Mexico only required a layover, but that's almost as bad -- and George Bush International Airport sucks for so many reasons. But today Denver International Airport offers nearly 25 non-stop flights a day to Mexico -- some guided by Frontier's friggin' Flip -- with fares often equivalent to those for a domestic flight, upgrading a weekend getaway to Mexico from possible to feasible. Arriba!