Kolkata to Guwahati flight route is a vital air link for the Northeast. From business travel and family visits to students and tourists, this route sees consistent demand throughout the year. In 2026, flight prices continue to change quickly, but smart booking can help you save a lot. This guide explains Kolkata to Guwahati flights , price trends, the best time to book, airline options, and proven tips to find the cheapest flights from Kolkata to Guwahati without hidden charg