Side note, this 3 hour delay nearly ruined my entire ski trip. The delay was on a Friday night, and since Frontier has only a handful of flights out of Nashville, they couldn't get me to Denver until Monday, the date of my return!

There was an available flight to Bozeman that same day on Delta through SLC but Frontier insisted that they can only rebook on Alaska (doesn't fly to BNA) or American (no seats until 3 days later because of Dallas ice storm). Buyer beware if you book Frontier during irregular operations.