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Flights from Kathmandu to Colombo

Airlines operating flights from Kathmandu to Colombo

Choose from 5 carriers that fly from Kathmandu to Colombo, including SriLankan Airlines, Air India, and Thai Airways. Enjoy the cheapest tickets on this route with SriLankan Airlines.

Find direct flights from Kathmandu to Colombo within the next three months. Book one-way flights from AU$532 or return tickets from AU$758.

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight details for Kathmandu to Colombo

The distance between Kathmandu and Colombo is about 2,380.67km. It takes around 3 hours 35 minutes on average to fly from Kathmandu to Colombo. The most popular month to Colombo is January. The off-season for travel is September.

Cheapest one-way flight priceAU$327
Cheapest return ticket priceAU$645
Off-season travel monthSeptember
Peak season for travelJanuary
Flight distance2,380.67km
Average flight time3 hours 35 minutes
Popular airlineSriLankan Airlines

Find the best time to fly from Kathmandu to Colombo

The cheapest time for Kathmandu to Colombo flights: Jan 25 to Feb 1 — one way flight prices from AU$318.

Cheapest flights
From price
Search
  • 2330
  • Dec

    307
  • 714
  • 1421
  • 2128
  • Jan

    284
  • 411
  • 1118
  • 1825
  • Feb

    251
  • 18
  • 815
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Flight FAQs

  • Which airlines offer the cheapest flights from Kathmandu (KTM) to Colombo (CMB)?

    Based on Trip.com data, Air India offers one-way fares as low as AU$327 on Cheapest nonstop routes (e.g. KTM to CMB on Sat, Nov 29), while Air India offers Cheapest nonstop round-trips from AU$645 departing on Wed, Nov 26 and returning on Sat, Nov 29.
  • At the moment, you can catch a direct flight from Kathmandu to Colombo with the following airlines, including: SriLankan Airlines Air India Express IndiGo Air India 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 35 minutes to fly from Kathmandu (KTM) to Colombo (CMB).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Kathmandu to Colombo 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 Kathmandu to Colombo. You can check the weekly schedule for popular airlines on this route below: SriLankan Airlines: S/-/T/W/-/-/S -- UL182 (13:54)
  • To find best deals on flights from Kathmandu to Colombo, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Nov 29, with one-way flights priced at just AU$327.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is SriLankan Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Colombo travel is around January.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Kathmandu to Colombo is September, when demand for travel is lower.
  • After crunching the numbers on our November flight calendar, it's currently cheapest to fly from Kathmandu to Colombo on November 29, 2025 with Air India Express, with prices starting at AU$341.
  • You can land at any one of the following hubs in Colombo, with Tribhuvan International Airport to Bandaranaike International Airport (KTM-CMB) is by far the most common option on this route: Bandaranaike International Airport (CMB).
  • The time difference between Colombo and Kathmandu is 0h.
  • Tickets can only be changed or cancelled 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.