Frontier one-day sale to/from Denver

George Hobica, February 13, 2008
Fares from Washington DC, District of Columbia:

    Many of these fares can be booked only on Frontier's site. They're up to $50 more on Travelocity, Kayak, Orbitz, Sidestep, Expedia, and so on. Sale ends midnight MT tonight. Travel through April 30 with a 10-day adv. purchase.