Kathmandu doesn't observe daylight saving time but Tallinn does. DST in Tallinn started on 31 March 2019 and will end on 27 October 2019. Once DST ends in Tallinn the time difference between Kathmandu and Tallinn will be -3:45 hours.
Distance from Kathmandu to Tallinn is 3583.1 Miles (5766.4 Kilometers / 3111.5 Nautical Miles).
Approximate flight duration time for a non-stop flight from Kathmandu, Nepal to Tallinn, Estonia is 7 hrs, 26 mins.