What: Shares of regional airline operator SkyWest (NASDAQ:SKYW) popped 20% on Friday after its quarterly results blew out Wall Street expectations.

So what: SkyWest shares have been sluggish in recent weeks on growth uncertainty heading into the quarter, but a wide Q2 beat -- EPS of $0.61 on revenue of $788.4 million versus the consensus of $0.27 and $771 million -- is forcing analysts to quickly boost their valuation estimates. Operating expenses even declined by $85 million over the year-ago period, giving investors plenty of good vibes over SkyWest's cost structure and completion rates going forward.

Now what: Given the significant reduction in its fuel costs, I wouldn't expect SkyWest's operating momentum to slow anytime soon. "Our second quarter results reflect meaningful progress in our action plans to secure profitable flying contracts, remove unprofitable aircraft and provide solid operating performance," said President Chip Childs. "These actions are the primary drivers for the strong earnings momentum we are generating. We remain committed to disciplined deployment of capital and resources as we continue the process of optimizing our fleet size and mix." Of course, when you couple the airline industry's notoriously intense nature with SkyWest's suddenly hot stock price, conservative Fools might want to hold out for a wider margin of safety before buying into that bull talk. 

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.