The nearest airport is in Sheremetyevo Airport (SVO), located 18.5 mi (29.7 km) from the city centre. If you can't find a flight that works for your travel itinerary, you might consider flying into Moscow (VKO-Vnukovo Intl.), which is 19.5 mi (31.4 km) away.
If you're travelling by train, make your way to Moscow Sortirovochnaya Station or Moscow Novaya Station and explore the city from there. Catch a ride on the metro at Aviamotornaya Station to easily navigate the city.