Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Reagan-National Airport to Russia as you normally would.
Most travelers choose Washington, D.C. Reagan-National - Moscow Sheremetyevo, Washington, D.C. Reagan-National - Moscow Domodedovo or Washington, D.C. Reagan-National - Kazan when deciding on the best route from Washington, D.C. Reagan-National Airport to Russia.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Washington, D.C. Reagan-National Airport to Belaya Gora Airport flight would often be abbreviated as a DCA to BGN flight. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Bogorodskoye Airport (BQG), Batagay Airport (BQJ), Blagoveschensk Airport (BQS), Bratsk Airport (BTK), Bovanenkovo Airport (BVJ).