Find Indigo(6E) flights from Colombo to Kathmandu

At the moment, you can catch a nonstop flight from Colombo to Kathmandu with the following airlines, including: Srilankan Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

It takes about 3 hours 40 minutes to fly from Colombo to Kathmandu.

By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Colombo to Kathmandu is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

Based on Trip.com data in the past 4 weeks, there is 4 flight per week flying from Colombo to Kathmandu. You can check the weekly schedule for popular airlines on this route below: Srilankan Airlines: S/-/T/W/-/F/S -- UL181 (08:35)

The cheapest months to fly from Colombo to Kathmandu is August, when demand for travel is lower.

After crunching the numbers on our September flight calendar, it's currently cheapest to fly from Colombo to Kathmandu on September 16, 2026 with Air India, with prices starting at US$375.

You can land at any one of the following hubs in Kathmandu: Tribhuvan International Airport (KTM). Flying from Bandaranaike International Airport to Tribhuvan International Airport (CMB-KTM) is by far the most common option on this route.

The time difference between Kathmandu and Colombo is 0m.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.