Frontier Airlines DEN Terminal [phone]
I had an easy time navigating through the <a href="https://www.terminalsme.com/frontier-airlines/frontier-airlines-den-terminal-denver-international-airport/">Frontier Airlines DEN Terminal</a>. The check-in was simple, and the people were nice, so it was simple to do. Security lines moved quickly, which was a blessing. The terminal was full of seating, and although the food choices weren't the best, they were adequate for a quick snack. Boarding was orderly, and the flight itself was punctual. In general, if you're flying Frontier from DEN, look for a no-frills, low-cost but solid experience.