Nice ! Looks like you're all set for your vacation ?
There are direct trains but no direct flights for this journey. kolkata (West Bengal) to Haridwar (Uttarakhand) distance is 1307 km and you can get there by flight + cab in just over 9 hours and 11 minutes or by train fares starting from ₹ 499.
Beautiful weather for sightseeing and other outdoor activity.