Today's Denver Post piece about this startling, and very welcome, development doesn't go into the reasons for the eleventh-hour reversal of fortune. But expect speculation to center on those Frontier pilots, who held the key to the entire deal. They likely knew that by refusing to agree to be put at the bottom of the seniority list among Southwest personnel, they would give Republic a chance to prevail, and it did.
Next drama: Will Frontier continue to be based in Denver? That question remains (agonizing pun) up in the air at this writing. But its continued existence is victory enough for one day.