Fly into Sheremetyevo Airport (SVO), the closest airport, located 16.8 mi (27 km) from the city centre. If you're unable to find a flight that fits your schedule, you could also fly into Moscow (VKO-Vnukovo Intl.), which is 13 mi (20.9 km) away.
If you're travelling by train, the main station serving the city is Moscow Kiyevskaya-Sortirovochnaya Station. You might consider catching a ride on the metro at Park Pobedy Station for ease of access to the rest of the city.