The distance between delhi to Kathmandu is approximately 501 miles which means 806 km or 435 nautical miles, it only takes one and half hour on the fly to reach kathmandu from New Delhi, India via any flight. However there are options availble to travel delhi to kathmandu by other means of transports such as Trains, Buses, Volvo Buses, Private Cars, Taxis. There is a direct flight from delhi to kathmandu by Jetlite airlines of Jet airways at lowest airfare. To book Jetlite flight for delhi to kathmandu visit kathmandu flights website.