in March I will have arrive at HEL around 3pm from Schengen, my onward flight is around 9PM (non-schengen). As I have never been to the platinum wing before, I would like to go there after arrival ince it closes 5:30pm, have a meal, then go into the city, to be back at the airport on time for my onward flight.
Is this feasible, both timing wise as process wise (leaving the non-schengen zone to come back later)?