Just learned that WN is looking to Spirit as their next acquisition by January.
I have several friends in DTW and they're saying "all aboard" for any offer from Wn.
They're practically giddy over this rumor.
Since Spirit is profitable, and has been around longer than Frontier, SW would have to offer seat protection, domicile protection, and relative seniority for starters.
But Spirit offers more international routes than Frontier.