Allegiant Air is seeking permission from US regulators to start service between Las Vegas and the Mexican destinations of Hermosillo and San Jose del Cabo, starting around 1 June 2014.
The airline filed an application for the service with the US Department of Transportation (DOT) on 2 July, saying that it expects to operate two round-trip flights weekly on each of the routes using 166-seat McDonnell Douglas MD-80 aircraft.
The flights would be Allegiant's first international destinations, but the Las Vegas-based airline notes in the application that it has "extensive" experience operating charter flights to Mexico.
Allegiant has said in recent months that it expects to begin service to Mexico in late 2013 or early 2014. It has said routes will target US passengers traveling to Mexican leisure destinations and Mexican citizens in secondary cities looking to travel to US vacation hot spots.
The carrier is working on creating a bilingual website and establishing a Spanish-speaking call center, it has said previously.
Allegiant previously expressed interest in Mexico flights but backed away in 2009, saying that the flights would only work if US customs opens pre-clearance facilities in Mexico.