Ten of the routes will be the only nonstop option available at the airport.
The airline said opening up flights more than a year in advance will give travelers more leeway using their vouchers to postpone flights.
Sun Country Airlines recently added nine routes out of Minneapolis-St. Paul International Airport.
MSP becomes the 10th airport in the U.S. to offer direct flights to Belize.
The company's Eagan call center was understaffed, Jude Bricker said.
Some are still waiting to get back from Mexico and domestic destinations.
It's slashing jobs, and now it's slashing Surly from its menu.
It's outsourcing ground service responsibilities to a contractor.
The airline announced the seasonal routes set to start next spring.
They got the OK for non-stop flights but hadn't started them.
Passengers were left in Waco while their flight headed to the final destination.