Ukraine is generally safe for solo female travelers when sticking to major cities like Kyiv and Lviv, where people are accommodating and there is a well-established tourist infrastructure. There's a good public transportation system and plenty of accommodations to choose from. However, you should practice common safety measures like not walking alone late at night, avoiding deserted areas, and maintaining awareness of your belongings at all times. It is also recommended to avoid Eastern Ukraine and Crimea due to ongoing political instabilities.