You'll find there's only one terminal building at Moscow Vnukovo Airport, so you won't have to worry about getting lost. Avoid rushing to your departure gate, or missing your flight completely, by arriving 1.5-2 hours ahead of domestic flights. Arrive at the airport 2-3 hours before if you're traveling internationally. This will give you enough time to check in luggage, clear security and customs and find your way to your gate. It's also a good idea to check the arrival time recommendations of both your airline and departure airport.