Besides these charter flights there are also regular flights by "Aeroflot": 2 daily flights from Moscow to Phuket & 1 daily flight from Moscow to Bangkok.
Problem is the prices for air tickets 2-3 times more expensive than in previous years.
Tour packages 3-4 times more expensive than in previous years - not so affordable for most people.
So the sales will not be huge as before when tens of charter flights operated every 1-3-7-10-14 days from many large Russian cities (up to 16) to Utapao, Suvarnabhumi, Phuket, Krabi - in addition to many regular flights.
Another problem is security of flights by Russian airlines which was officially downgraded (for example, pilots will not be subject to medical examinations as often as before or the approved use of non-original spare parts etc etc)