Separately, Spirit Airlines and Mexican low-fare carrier Volaris will offer new routes to Mexico.
Volaris will launch one daily roundtrip between Oakland, Calif., and Mexico City on May 6. The carrier currently flies from Oakland to Guadalajara and begins service between Fresno and Guadalajara on April 14 with four flights a week.
Spirit plans to add twice-weekly nonstop service June 3 between Fort Lauderdale and Toluca Airport, 25 miles west of Mexico City.
The airport "serves as a convenient alternate to Mexico City Airport," according to Spirit.