Flight initiated in Austin was 1 hr late. Due to a tight connection in Denver, I requested to be placed on the United flight which was on-time. The agent assured me that I would have 20 minutes to make my connection in Denver. After arriving in Denver in gate 4, the greeting agent advised that my Albuquerque flight was departing from gate 64. Arriving at gate 64, the flight had left. I stood in customer service line for 90 minutes. They placed me on a 5pm flight. The scheduled visit to Albuquerque was a day trip. Frontier refused a refund. The flight was booked through Expedia - it offers no customer service, but that is another matter. read full review »