Frontier Airlines is expanding its presence at Hartsfield-Jackson Atlanta International Airport (ATL) in a big way, with nine new routes launching between May and June.

Frontier Airlines, the third-largest single carrier at the world’s busiest airport, is adding two international routes from Atlanta as part of an expansion to eight new cities from Hartsfield-Jackson.

Frontier is currently the fastest-growing U.S. carrier at the Airport, based on the number of destinations it serves. ATL is also a hub for crew members, with employment projected to surpass 1,200 this year. The expanded workforce will include pilots, flight attendants, airport customer service agents, ground handling, and maintenance personnel.

The budget airline is making moves at the busiest airport in the U.S. Travelers will soon have many more options for their beach getaways from Atlanta. Frontier Airlines just announced nine new destinations from the busiest airport in the country,

The ultra-low-cost airline is adding flights to nine more markets in an expansion that bolsters it as the third-largest airline at the busiest airport in the world.

Frontier Airlines is expanding operations at Hartsfield-Jackson Atlanta International Airport by 40% this summer.