Originally Posted by
riku2
yes you can use any security checkpoint for any flight, there are not really two "terminals" but two departure halls and three luggage claim areas and after security it's just one area - perhaps not even signs saying T1/T2 (because T1/T2 are really departure halls and not terminals).
Yes, I know they're interconnected.

I've walked on the airside between them. Never just thought of going through security at the other terminal, when my flight is from the other one. The concept of interconnected terminals isn't HEL specific anyway.
Originally Posted by
riku2
There are some new gates at the end of the T1 area which are now used by finnair domestic flights, so if you stick to airport authority terminology you would check in at T2 and depart from T1!
Okay, haven't had one from there, so it's interesting hear that.