You need an ETA for Mexico if you have a Ukrainian passport

Travelers need travel authorization to visit Mexico for Business or Tourism. Visa-exempt visitors entering Mexico must obtain an Electronic Travel Authorization (eTA). Travelers can submit the eTA application online. Once the application is approved, travelers receive their eTA confirmation electronically. If travelers receive a new passport, they must apply for a new eTA. A valid eTA is required to board the flight. If the eTA is expired or doesn’t match the traveler’s passport information, travelers will not be able to board their flight. This Electronic travel authorization requirement doesn’t apply to the following travelers: -Travelers with a valid visa for Canada, Japan, Schengen Area, United States, or United Kingdom; -Travelers who are permanent residents of Canada, Japan, a country in the Schengen Area, United States, or United Kingdom. The residence card should state explicitly "permanent residence” or “permanent resident”.