Frontier Airlines is joining two other carriers in providing service from the Phoenix-Mesa Gateway Airport.

Monday’s announcement by the carrier followed about a year of negotiations.

The addition of the Denver-based carrier will triple the number of destinations reachable from the airport.

An exact flight schedule hasn’t been released.

Mesa Mayor Scott Smith says having Frontier as a third carrier legitimizes the airport.

Las Vegas-based Allegiant Air began serving the airport in 2008, and Florida-based Spirit Airlines since earlier this year.

For more information about Frontier Airlines and Phoenix-Mesa Gateway Airport, visit Frontier Airlines’s website at frontierairlines.com and visit Phoenix-Mesa Gateway Airport’s website at phxmesagateway.org.