REQUIREMENTS FOR U.S. CITIZENS
You need a valid passport to enter Ukraine. If you are a U.S. citizen, you do not need to have a Ukrainian visa as long as you will be in Ukraine for fewer than 90 days within a 180-day period.
You need a visa or valid Ukrainian residency permit for all stays longer than 90 days.
You cannot get a Ukrainian visa at the airport or at the border. If you need a visa, please get it in advance at a Ukrainian Embassy or Consulate.
You should check your visa carefully so that you know the validity period. You are responsible for knowing the rules for the type of visa you have. Sometimes U.S. citizens try to come to Ukraine before their visa allows.
It is essential to remember, in Ukraine the date is written day-month-year. If you come to Ukraine before your visa allows, you may be stopped at the border, not allowed to enter Ukraine, and required to return to your point of origin at your own expense.
VISA FREE REGIME FOR SELECTED COUNTRIES
Ukraine introduced a Visa free regime for citizens of the countries of European Union, U.S.A, Canada, Japan, Switzerland, Norway, San Marino, Monaco, Iceland, Vatican, Andorra, Liechtenstein and Republic of Korea, who may stay in Ukraine without visa up to 90 days.
A passport valid for six months beyond the planned date of travel is required.
For citizens of the above mentioned countries who enter Ukraine with the purpose of employment, permanent residency, study and work at the diplomatic missions of the above mentioned countries in Ukraine or with any other purpose if they are going to stay in Ukraine for more than 90 days, visas are still required.
No visas are required for citizens of the countries of the Commonwealth of Independent States (except Turkmenistan).
FOR ALL VISA TYPES, PASSPORT REQUIREMENTS, PROCESSING FEES AND GENERAL PROVISIONS ON APPLYING...GO TO:
http://usa.mfa.gov.ua/en/consular-affairs/services/visas