DALLAS—AirTran Airways is selling tickets for new flights between Chicago and both Jamaica and the Dominican Republic that it expects to operate beginning this spring.

The airline still needs government approval for the international flights.

AirTran parent Southwest Airlines Co. said Thursday that flights between Chicago's Midway Airport and Montego Bay, Jamaica, will start April 14 and fly on Mondays, Tuesdays, Fridays, and Sundays.

The airline said flights from Midway to Punta Cana in the Dominican Republic will start May 19 and run on Mondays, Thursdays, Saturdays, and Sundays.

Shares of parent Southwest rose 3 cents to $11.03 in afternoon trading Thursday.