The best time to visit West Bengal is between October and March. This period marks the absence of sweaty and suffocating humid summer climate. The ten day ritual of Durga Pooja is the grandest celebration and worship towards goddess of strength which takes place in October. This is also the period when the doors to see the Royal Bengal Tiger is opened for the visitors
The international airport of West Bengal is located in the capital of the state Kolkata; where there are regular international flights and also multiple domestic flights from major cities of India.
One can take a road trip to Kolkata from Delhi, Mumbai or Guwahati; however one should remember that the road connections get affected once in a while due to floods. The road distance is great however there are multiple dining and resting options available on the route.