Frontier's latest attempt to buy Spirit underscores the "evaporating" state of the low-cost airline business model.

Three U.S. senators said they want Frontier Airlines and Spirit Airlines to disclose whether they are manipulating seat fees by using customers' personal information to charge different fees to ...

(Trust us, Spirit Airlines isn’t even on their radar.) Take a look at some of the best first class airplane seats, including all of their upscale amenities. Are these suites or hotel rooms?

WASHINGTON (Reuters) - Three U.S. senators said they want Frontier Airlines and Spirit Airlines ... to charge different seat fees to passengers on the same flight" despite having the same fare.

Senators Question if Frontier, Spirit Airlines Are Manipulating ... personal information to charge different seat fees to passengers on the same flight" despite having the same fare.