Air Baltic's YL-BAJ is a De Havilland Canada DHC-8-402Q Dash 8, later known as Dash 8 Q400. It was delivered in December 2010.
Picture from Helsinki-Vantaa airport in Finland 22.3.2018 by Ilkka Siissalo.

Another one of Air Baltic's Dash 8 Q400 machines.
Picture from Helsinki-Vantaa airport in Finland 3.11.2018 by Ilkka Siissalo.

Passengers boarding Air Baltic's Bombardier Dash 8 Q400 YL-BBT in Riga, bound for a flight to Helsinki. The machine was delivered to Air Baltic as new in April 2013.
Picture from Riga airport in Latvia 4.9.2019 by Markku Salo.

Air Baltic is now busily getting rid of its Bombardier Dash 8 turboprops and is replacing them with brand new Bombardier C-series CS300 machines. Airbus bought the rights to this new plane type and it is now officially known as Airbus A220, so this one is now officially an A220-300. Air Baltic and Swiss International Airlines are the biggest users of this new type in Europe.
Picture from Paris Charles de Gaulle airport 3.6.2018 by Ilkka Siissalo.

Air Baltic's new Airbus A220-300 (former Bombardier C Series) YL-CSK is taped in the colours of the Lithuanian national flag. It's a very new machine, taken in use in August 2018.
Picture from Riga airport, Latvia, 3.9.2019 by Markku Salo.

Air Baltic's Airbus A220-300 YL-CSC was delivered to Air Baltic in March 2017. Its typical destinations have been for example Wien, Rhodos, Brussels, Budapest, Amsterdam and Milano.
Picture from Riga airport, Latvia, 3.9.2019 by Markku Salo.

This was Air Baltic's flight BT308 from Helsinki to Riga on 24.8.2024 but it was this time flown using Carpatair's Airbus A319 YR-ABA. Carpatair is a Romanian private airline which flies mainly tourist flights but they also lease their planes to other airlines when someone has an urgent need.
Picture from Helsinki-Vantaa airport 24.8.2024 by Markku Salo.