Spirit Airlines is launching Denver service to irritate Frontier, the newest ultra low cost carrier. A benefit to me is Spirit is bringing super low prices on the DEN-ORD route. The incumbent carriers aren't even close. I really hope the Southwest Effect happens and United lowers their fares in light of new competition. If not, $170 savings might get me on a Spirit flight.
Look at that low fare - or - Look at those two high fares