I want to fly to to Russia end of August and spend a week there, what's the best way of getting there

I want to fly to to Russia end of August and spend a week there, what's the best way of getting there?
I live in Virginia USA, I can fly out of Baltimore air port in Maryland and my objective is Rostov. Whats the cheapest and best way of going about this? Should i fly to Moscow then switch flights there or go straight to Rostov?
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Delta I know flies to Moscow. Aeroflot is part of the SkyTeam Alliance so if you fly Delta and Aeroflot, you should be able to arrive in Rostov and earn Delta frequent flier miles for the entire trip.