MORRISVILLE, N.C. (AP) — Frontier Airlines is adding service from North Carolina's capital city to six cities.

The Denver-based airline said Thursday it will offer service from Raleigh-Durham International Airport to Buffalo, Houston, Milwaukee, New Orleans, San Antonio and San Juan, Puerto Rico.

The service to Buffalo, San Antonio and San Juan will be the only service from Raleigh-Durham.

Raleigh-Durham will now offer nonstop flights to 53 locations.

Frontier has been operating at Raleigh-Durham since 2013.