Copy shortlink: Sun Country Airlines Holdings Inc. posted a $12.4 million profit in its first-ever quarterly results, and executives said summer bookings were rising quickly for the Twin Cities-based carrier. As of Wednesday, Sun Country's summer schedule is sold to a higher capacity than it was at the same time two years ago, the airline said as it released first-quarter results following market close. Shares rose 4.7% in after-hours trading as investors digested the news. The airline industry endured a nearly ruinous year due to the coronavirus pandemic. But with more Americans getting vaccines, it is starting to come back, and Sun Country, a carrier that relies heavily on leisure travelers, is on pace to fly more passengers than it did in the summer before the pandemic.