Southwest late Monday said it had submitted an application to the U.S. Department of Transportation to acquire the required international route authority.
The application for a certificate to provide foreign air transportation is needed before Dallas-based Southwest Airlines can fully implement the previously announced codeshare deal.
Codesharing allows airlines to sell seats on each other's flights. Southwest has formed a similar alliance with Volaris in Mexico.
Southwest says it hopes to receive the route authority in the first quarter of 2009 and announce codeshare flight schedules with WestJet a few months later. ------