I'm also in, with a slight delay! I'm currently in St. Petersburg until 4 PM local time, and in Kyiv at 5 PM.

If you're flying into Boryspil, take SkyTaxi - their stand is right at the terminal exit, and the ride will cost 20-25 dollars. Or, take the shuttle bus and ask the driver if he can drop you off near Slavutych metro station (the shuttle passes by it).

If you're flying into Zhulyany airport, it's half the city away, even though the distance is the same as from Boryspil, but there's no direct shuttle (it involves three transfers), so it's better to take a taxi from there.