PSSM Workshop on Liquid Crystals and Colloidal Dispersions
The citizens of USA, Canada and EU do not need visa to enter Ukraine. You will need a valid passport which must have at least six (6) months until expiration. All others should contact your local embassy or consulate for the most up-to-date information or visa forms.
For international participants Lviv is directly accessible via Lviv International Airport (LWO) or Lviv Railway Station. Direct flights from Frankfurt, Dortmund, Viena, Warsaw, Moscow and Kyiv to Lviv are available. One also can use direct trains from Budapest, Krakow and Kyiv.
After arrival, you have to pass two controls: The passport control and the customs. Usually in the end of your flight travel, the flight attendant will hand you over the corresponding forms. The passport control is just a walk-through.
More information on travel to Ukraine can be found, for example, here.