Whoa the race route is quite frantic this season, from Europe to Africa back to Europe again. I would've thought they'd proceed to the Middle East from Africa. Maybe they went back to Europe as Plan B because of the current Middle East problems?
From Russia they can go to one of the Central Asian countries (Tajikistan or Turkmenistan are not in the Travel Warning list, or they could come back to Kazakhstan or Mongolia). There's a travel warning to India & Philippines, Thailand is having problems in the capital, China's been in the last season, Sri Lanka's travel warning was only recently cancelled (but too late for race planning). So either to Central Asia or Japan, Vietnam, South Korea, Taiwan, Indonesia, Hong Kong, Macau.
Agree about Laos, although this could still be a race destination, if they travel overland from say, Vietnam. I think the problems are just concentrated in Bangkok.
ETA: direct flights from St.Petersburg international airport (Pulkovo-2) to Asian countries are to Almaty (Kazakhstan), Beijing, Bishkek (Kyrgyzstan), Istanbul, Seoul, Tokyo, Tel Aviv.
Istanbul, Tel Aviv & Bishkek are highly unlikely, so...
But via Moscow, there are more possibilities.