In what the airline is calling its largest route announcement, Sun Country will add seven new destinations and 19 seasonal routes next summer. 

With the additions, the Minneapolis-based leisure carrier said it will operate 49 routes this summer, up from 28 last summer. 

Sun Country's network diversification has followed its 2017 decision to morph into an ultra-low-cost carrier in the mold of Spirit, Frontier and Allegiant. Previously, most of its routes connected Minneapolis/St. Paul to a warm-weather destination. 

Minneapolis/St. Paul remains the airline's largest base by far, and eight of the new routes this summer include the Twin Cities. Flights from Minneapolis/St. Paul to Washington Dulles, Providence, Newark, Chicago O'Hare, Philadelphia, St. Louis, Sacramento and San Antonio will begin in April, May and June and will operate four times weekly.

Sun County will also increase its destinations from Nashville, Dallas/Fort Worth, Portland, Las Vegas and San Francisco.

Sun Country destinations that weren't on its 2018 route map are to include Chicago O'Hare, Newark, Philadelphia, Sacramento, San Antonio, Providence and Dulles. The carrier had served several of those airports before 2018, but has never before served Providence or San Antonio.

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