It should also be interesting if these fares are even worth chasing in the long run. The airline industry history is littered with decisions rescinded down the road that were flawed to begin with. If traffic is so strong why even chase this group? One thing in addition to the low fares and fees are known for is the insane level of complaints they deal with. Spirit and Frontier lead the industry in complaints because they chase the infrequent traveller drawn to the fare and those carriers don't really care about it. In fact I think BBB at Spirit is proud of the complaint level. Once these start to affect the operation as a whole and the bread and butter customer DL has, how fast will they pull the plug on those fares?WorldTraveler said:including the ULCCs in the US whose fares DL is matching.