Ukrainian Currency is called Hryvnia (UAH), which was introduced on the 2nd of September 1996. One Hryvnia equals 100 kopiykas. There are 1, 2, 5, 10, 20, 50, 100 and 200 Hryvnia bills.
You can change money at the airport but the rate is not as good as in town. However you will need to have some local currency to get you to your Hotel. You should be able to get by changing $20 or $30 at the airport, then the bulk of your monetary needs at a local money exchange point or at the bank later in town. Don’t change money with strangers on the street!! You will probably be tricked into losing your money and it’s ILLEGAL!!
Banks in Ukraine are normaly open to the Public Monday through Thursday from 9:00 a.m. until 5 p.m., and on Fridays from 9:00 a.m. until 4 p.m. Please note however that the Cashier's will close their windows an hour earlier. They will also close for lunch from 1 p.m. until 2 p.m. ATM machines are a safer option at or near the Bank, or at large shopping centers. It's better to avoid using ATM's at the local "bazar" (market) areas or next to little street kiosks and stores.