Virgin America ceases to be a separate option from April 18

Alaska announced that Virgin America will be merged into its own AOC by mid January 2018 and its website and flight inventory will no longer function from April 18 2018. Flights will operate under one booking regime from the 24th April.

This means that from April 18th the fleet is effectively mixed and buyers will find 737 on A320 routes and so on, though initial indications are that little will change in the first few months. 

The Virgin America brand will however remain only as long as it takes to paint it out and refit aircraft and airport facilities.