Most travellers find the cheapest round-trip flights to Moscow when choosing a flight departing in February.
In general, most flyers find the cheapest time to book a flight to Moscow is about 60 days prior.
From most locations, the cheapest flights to Moscow are found on a Tuesday. Booking a Saturday departure is usually the most expensive.
Typically, cheap prices to Moscow are most often found for evening flights. Cheap prices are less likely for morning flights.