Could Snowden now be in Cuba.
Yesterday's flight http://nl.flightaware.com/live/flight/AFL150
And the route the flight usually takes via the great circle http://nl.flightaware.com/live/flight/AFL150/history/20130709/1121Z/UUEE/MUHA
Aeroflot flight 150 usually follows the great circle route taking in Scandinavia Greenland, Canada before flying down the eastern side of the United States.
Clearly yesterday's flight has taken a big deviation off the great circle route to avoid US airspace.