Venezuela's President Nicolas Maduro is in Moscow for at two day visit, but while he said Snowden should be supported, he ruled out giving him a lift on his plane. That would have given Snowden a route to the Western Hemisphere, and perhaps Ecuador, while avoiding potentially hostile layovers.
As for the Europeans; Iceland, Norway, Germany, Austria, Switzerland, and Finland all say Snowden has to be on their soil or in their embassy to apply for asylum. Since he cannot leave the airport, he does not have a Russian visa, and he does not have a valid travel document those responses seem as good as a no.
So what options does Snowden have left?
China has already reportedly kicked him out once from Hong Kong and, after failing to board flights to Havana last week, U.S. officials believe he's not welcome in Cuba either.
The only countries left on his list of 21 asylum applications are Bolivia, France, Germany, Italy, Ireland, Holland, Nicaragua, and Spain.
Bolivian President Evo Morales reportedly said today his country would "consider the idea," but on commercial flights, Snowden cannot cross the Atlantic or Pacific Oceans without connecting through a country with a U.S. extradition treaty, so that presumably rules out Bolivia and Nicaragua. It seems unlikely that the remaining Europeans countries are willing to risk their relationship with the U.S. and give him safe haven, even though they are angry about reports that the U.S. has been spying on their embassies.
That leaves exactly zero available countries on the initial list of 21.
Meanwhile, the U.S. is placing enormous pressure on any of the countries he could fly to from Moscow.
Though information on highly classified programs appears to still be leaking out with no sign of stopping, at least when it comes to Snowden's travel plans, it all seems to be going to plan for the U.S. A U.S. official told ABC News last week they expected Snowden to run out of options by around this time.
There is still a chance that a country could issue Snowden an emergency travel document and that a private plane, paid for by deep-pocketed backers, could pick him up from Moscow and deliver him to a sympathetic country. But Snowden looks increasingly boxed in, with his options disappearing seemingly by the minute.