Europe certainly has its share of struggling airlines, but Ryanair, easyJet and Wizz Air are not among them. And for Ryanair and Wizz, fourth quarter earnings simply topped off a triumphant 2016. (easyJet has yet to report on its fourth quarter.) In the U.S., Spirit’s fourth quarter numbers were great—just not great for Spirit, as the hunter has become the hunted. Meanwhile all those LCCs and ULCCs were bested in 2016 by Alaska Airlines, a carrier that’s never been happier to call Seattle home. And in Asia, South Korea’s two biggest carriers—Korean Air and Asiana—are persevering despite a slowing home economy and competition from Japanese and Chinese carriers.