Originally Posted by Levithian

Hi Escape,

I've taken this route many times, if you book directly with KLM, you might get the seatmap upon check-in, but most of the times no.
Alternatively, you can contact Airbaltic (Via Facebook for example) and ask them to give you the booking number they have in their system for you, as this one is different than the one you get from KLM.
Then you can go to booking management on the airbaltic website and arrange your seats. There are no 'comfort' class seats on Airbaltic, it's either Economy or Business, they do offer the most forward seats for selection, I think these are around 10 euros and 5 euros for the others. If you have selected a flex ticket, the seat selection will be for free.

I hope it helps!