As per
airlineroute, "SWISS Ends 4 European Routes in April 2016":
SWISS during the month of April 2016 is gradually ending 4 European routes, including 3 from Geneva. Planned routes cancellation as follow:
Geneva – Belgrade 2 weekly, last flight operates on 16APR16
Geneva – Copenhagen 5 weekly, last flight operates on 17APR16
Geneva – Sarajevo 2 weekly, last flight operates on 16APR16
Zurich – Helsinki 4 weekly, last flight operates on 30APR16
I'm very disappointed to see HEL go, especially since it was only just (re)started a year ago.