My travel companion and I are not on the same booking. How can I do online check-in for both of us and make sure that we are seated together?

To make sure that you are seated together, you can select a seat in advance for an extra fee when travelling in Economy, Premium Economy or Business Class for both of your bookings. Charges depend on the selected seat type, your ticket type, the length of your flight and your frequent flyer status.

You can reserve your seat in advance when reserving your flight or afterwards via the Manage booking page. You can use the service for all flights operated by Finnair.

To check in a passenger on a different reservation, you will need their reservation code.  

Read more about seats and Finnair travel classes.