If you need to go to Moscow this year, things are looking up for you. It's not just prices in Moscow that have suddenly become affordable; flights are also really cheap.
Now Swiss Air (and not just Transaero) has a $414 fare to the Russian capital from New York. This is a K fare which earns nothing on United MileagePlus and just 25% on Miles & More. But long-haul economy on Swiss is as good as it gets and you may actually enjoy the flight (I assume it won't be full).
Sample dates are Feb 12 -16.
If this is a risky itinerary (or you are booking separate 'positioning flights') or the airline is of risk of bankruptcy, consider buying extra travel insurance.