The planes aren't certified to fly passengers yet. Bombardier reported that the CS300 aircraft has "completed over 70 per cent of its certification activities" at the time of the announcement, with full certification expected mid-2016.
The CS300's entry-into-service is scheduled for the second half of 2016 with airBaltic.
airBaltic has orders for 13 CS300 aircraft in a deal worth close to $1b, retaining options for seven more planes.
airBaltic was one of the first airlines to commit to the brand new design.