Southwest is headed across the border.

The low-cost carrier plans to launch six new international flights from Houston Hobby Airport late next year.

The new flights will coincide with the $156 million renovation of Hobby that will add five new gates on an international concourse.

Southwest hopes to begin the flights by October to Cancun, Mexico City, Puerto Vallarta, and Los Cabos all in Mexico as well as San Jose, Costa Rica and Belize City.

"Service to Mexico will be the cornerstone of our international operation at Hobby and the four cities we are announcing today provide exciting travel and business options for consumers," says Southwest CEO Gary Kelly. "Adding Belize to the Southwest network and growing our Costa Rica service continues our expansion to international destinations where our people and consumer-friendly policies can deliver as no other airline can."

Though Southwest already served some of the Mexico destinations already through other U.S. airports, the expansion at Hobby will make that airport the carrier's international hub.