Do I need an airport transit visa?

My nationality Obligation to hold a visa (yes/no)
Ukraine  no 
Moldova no

Ukrainian citizens need a transit visa (type C) only if they leave the international transit zones at Zurich or Geneva international airport (example: overnight in Zurich city en route to Canada) or if their flight route requires 2 stopovers within the Schengen zone (example: flight Kyiv-Geneva-Lisbon-Rio de Janeiro).

Other nationalities

For other nationalities, please refer to the list on the webpage of the State Secretariat for Migration (SEM). 

SEM – Visa Instructions – Annex 1, list 2 – Special Provisions regardless of nationality

If you are obliged to hold an airport transit visa, please apply for it and refer to the information on the webpage:

Where to apply for an airport transit visa?

If you are not obliged to hold an airport transit visa, you are allowed to transit through Switzerland and stay in the airport international transit area without any visa.