Mexico City-based Interjet said it will add 40 planes to its fleet as part of the low-cost airline’s plan to expand service in the U.S.

Interjet launched daily service from John Wayne Airport to Mexico City and Guadalajara, giving the airline its first service on the West Coast

The airline has extensive operations within Mexico. Its U.S. service includes flights out of Miami, New York and San Antonio. Service from Las Vegas to Mexico City is set to begin on Thursday, with twice weekly flights.

The new planes will cost an estimated $3.2 billion, with delivery beginning in 2018.

The Airbus A320 NEO planes will be added to Interjet’s existing fleet of 35 Airbus A320s.