United Airlines and smaller JetBlue Airways on Thursday asked the U.S. Transportation Department to reject a complaint filed by Spirit Airlines to their proposed partnership.

Spirit Airlines filed a regulatory complaint this week against two rival airlines, according to media reports. On Tuesday, Spirit formally filed a complaint with the U.S. Department of ...

Spirit Airlines, the Florida-based budget airline, is changing its travel options to emphasize they have premium seating, too. Here's what to know.

Spirit Airlines, the Florida-based budget airline, is changing its travel options to emphasize they have premium seating, too. Here's what to know.

Spirit Airlines has simplified its ticket options with new names like "Spirit First" (formerly "Go Big") and "Value" (formerly "Go"). The airline is also adding extra-legroom "Premium Economy" seats ...

Spirit Airlines has simplified its ticket options with new names like "Spirit First" (formerly "Go Big") and "Value" ...

Spirit Airlines said that the proposed JetBlue-United partnership “raises serious competition and public interest questions” in a complaint to the Department of Transportation filed on Tuesday.