Frontier has added five new cities to its route network. Starting in May, the airline will be flying nonstop between Denver and the following destinations:

• Bellingham, WA
• Bloomington-Normal, IL
• Cedar Rapids, IA
• Great Falls, MT
• Harrisburg, PA

As usual, Frontier is selling discounted “introductory fares” to drum up some publicity for the new services.

Until February 29, you can purchase a ticket on any of these five new routes at a reduced price. There are also a further 37 Frontier services on sale. You’ll find the full price list on their website.

These discounted fares are good for travel between May and June this year only (exact dates vary on each service). It’s not a particularly long travel period, but these are the cheapest prices you’re likely to see Frontier offering on these routes for some time.

You can book the cheapest Frontier tickets using our airfare comparison tool.