Southwest Airlines will next year begin its first international services from Oakland in California, operating to Puerto Vallarta and Los Cabos in Mexico.
The Dallas-based carrier plans to launch daily flights to both Mexican destinations on 12 February 2017, it says in a filing with the US Department of Transportation.
Southwest will operate Boeing 737-700s on both routes, it adds.
The carrier is already the biggest airline in Oakland, operating more than 70% of the flights out of the airport, FlightGlobal schedules data show.
No carriers currently operate on either of the two Mexican routes proposed by Southwest.
Mexican low-cost carrier Volaris in September 2015 received approval from US authorities to operate both routes, but has yet to start flights.
Source: Cirium Dashboard