Terminal B at New York City's LaGuardia Airport (LGA) is less than a decade old. JetBlue is hoping to exit LaGuardia's Terminal B, with its signature water feature and natural-lit concourses, in favor of the 1940s-era Marine Air Terminal. Terminal B at New York's LaGuardia Airport (LGA), May 2022. Spirit Airlines passengers at LaGuardia Airport (LGA) Terminal A in 2024. "Significantly cheaper ... versus what we see in Terminal B," JetBlue president Marty St. George said, speaking on a call with analysts Tuesday.