Originally Posted by kavm

Questions:

• Is it enough time to connect? I do not know if the flights arrive and depart from the same terminal. Also, how to find that out.
  Yes, 1h50m is enough time to connect if the two flights are in the same terminal. For information about your booking (which terminals / any change of flight time), check www.virtuallythere.com
• Am concerned about the quality of Aeroflot - safety, and otherwise. I guess comfort is something to compromise on, but safety is another matter. Any thoughts?
  Aeroflot is indeed very safe and its a common misconception that they're unsafe with old Soviet-era aircraft and poor service. The aircraft operating on your flights are using state-of-the-art Boeing and Airbus aircraft with accident rates in-line with other airlines across the world. Service onboard is highly professional and flight attendants take their job very seriously while on the ground, that's the main problem (Soviet-era attitude). On your SVO-DEL flight, you may have a chance of flying on the new Airbus A330 with personal TVs in Economy Class - Aeroflot is still finalizing its Winter 2010 schedule (latest progress: http://airlineroute.net/2010/06/07/su-w10-longhaul3/).
• We have US passports. Would we need visa for transit? What happens if we miss the connection?
  No visa required as long as you are not leaving the airport transit area. If you miss your connection (due to delayed flight), Aeroflot will most likely put you in the visa-free section of the nearby Novotel Sheremeyetvo hotel (with meals) and rebook you onto the next available flight.

If it matters, the flights are in December, so I'd also like to know if there are frequent delays in winter at Moscow.
It's quite hard to predict. For my travel in February 2010 (HKG-SVO-CDG rt), the flights were not delayed by weather at all though it was snowing quite heavily. <= typical Moscow weather