Bombardier's largest ever passenger jet, the CS300.
Latvia's airBaltic will be the first airline to operate Bombardier's CS300 plane commercially, in about a year's time, the Canadian manufacturer said Sunday.
The aircraft, currently under certification, can hold 120 to 150 seats.
Bombardier said it would deliver CS300 planes to the Latvian flag carrier - which has 13 of the aircraft on firm order and retains options for seven - in the second half of 2016.
Established in 1995, airBaltic serves about 60 destinations out of Riga, with a fleet of 25 aircraft.
"Bombardier's CS300 airliners are integral to the execution of airBaltic's business development strategy and fleet optimization plan," airBaltic chief executive officer Martin Gauss said in a statement.
"The CS300 aircraft... will offer airBaltic passengers a widebody, unparalleled in-flight passenger experience, perfectly complementing our modern fleet of 12 Bombardier Q400 turboprops."
Bombardier has orders for 243 of its 603 C Series aircraft, which are facing significant delays after a 2013 maiden flight and cost overruns, with about Can$2 billion more than the Can$3.4 billion initially planned.
On Thursday, the French-speaking province of Quebec announced a US$1 billion investment in Bombardier to help the fledgling jetliner program get off the ground after the Canadian company posted a US$4.9 billion third quarter loss.