Update: this popular deal may have sold out. See more deals >
Frontier Airlines is currently offering cheap flights to Denver, departing from five different cities across the country. See the full list here. The airline is advertising round-trip prices from $98. These are the rules:
– Travel dates vary on each route. Generally you can fly May through August.
– Sale fares are one-way only; round-trip purchase not required.
– Book flights by 11:59pm ET February 26