Since we share the single fleet-type business model, that makes things quite a bit more simple. It would probably amount to a relative seniority integration with CA seat locks (in base) and FO base locks for an agreed upon lengths of time. Things get more complicated when one successful airline is merging with a failing one, or in the case of dissimilar fleet types; but Frontier and Spirit are similar and profitable. And since both are currently growing organically, the argument would be, "why now?"

I wouldn't hold my breath, I think a merger is still a couple years away. A merger will initially sting for pilots (of middle seniority) on both sides, but really it is about the most level playing field you could ask for; and there seems to be a mutual respect between the Spirit and Frontier pilot groups.