Just a public service announcement.

If you have a passport from Finland, Japan, Luxembourg, New Zealand, Singapore, Cambodia, Vietnam, Philippines, Laos, Indonesia, or Myanmar you can get a Visa on Arrival when landing at Delhi, Mumbai, Chennai, Kolkata, Kochi, Thiruvananthapuram, Hyderabad or Bengaluru.

AFAIK there are at least direct flights to Kolkata from Kunming but I can't find prices.

Indirect flights are available to all those airports, eg. via Bangkok, and the typical prices are around 3500元 return (all inclusive).