First of all, I don't recall saying that it was easy. Until very recently, it was hard to get a beachhead established to be able to build a second WN. Keep in mind that WN was an established airline by the time deregulation hit, making them much harder to squash. Now that the legacies are weaker, thanks almost exclusively to WN, it's possible to get those beachheads, so you're seeing a more robust crop of LCCs this time.Whadayano said:...if it was so easy to duplicate, where are all those competitors?
And there are elements of WN in the LCCs.
Keep in mind that WN has a large network of focus cities today. It takes a while to build an airline up to that point, so you're seeing something sorta hubby in F9/B6/FL, but they're growing to the point where you're starting to see additional focus cities show up.
B6 appears to be particularly similar to WN in CASM. My own analysis suggests that B6 is doing a bit better than WN, even after stage-length adjusting; others have found that they are on par.
Either way, B6 appears to be the first such competitor in the US.