Cheap Flights from Kathmandu to Colombo

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Flight deals from Kathmandu to Colombo

Looking for a cheap last-minute deal or the best return flight from Kathmandu to Colombo? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Kathmandu to Colombo

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Kathmandu to Colombo flights are currently cheapest in August.

Direct flights from Kathmandu to Colombo

Alternative Kathmandu to Colombo routes

Looking for the cheapest, fastest or easiest route from Kathmandu to Colombo? You could fly into the following airports instead.

Kathmandu to Colombo: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 11,258
Cheapest month to flyAugust
Average flight time3 hrs, 38 mins
Most popular airlineSriLankan Airlines
Average flights per week5

Finding cheap flights from Kathmandu to Colombo: Frequently asked questions

There are 5 airports in Colombo: Kelaniya, Colombo Ratmalana, Colombo Bandaranayake, Bentota River, and Katugastota.
The best price we found for a return flight from Kathmandu to Colombo is ج.م.‏ 20,997. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
3 hours and 38 minutes is the average flight time from Kathmandu to Colombo.
SriLankan Airlines flies direct from Kathmandu to Colombo.
As of April 2025, there are 5 flights per week flying from Kathmandu to Colombo.
The cheapest month to fly from Kathmandu to Colombo is usually May.
If you're flying from Kathmandu Airport, the cheapest airport near Colombo is Colombo Bandaranayake – which is 27.5 km away from the centre of Colombo. We've found flights into this airport from ج.م.‏ 20,997.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Kathmandu Airport to Colombo on Saturday, 17 May 2025.
Yes – the average flight time is 3 hours and 38 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Colombo but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Colombo is around 40 days in advance, so don’t leave your flight to the last minute.
In April, the average temperature is usually around 28°C. May is typically the warmest month in Colombo, when it usually averages around 29°C. You can expect the least rain in February. The coldest month is July, with temperatures averaging 25°C. The rainiest month is November.
Currently, Air India and SriLankan Airlines offer the cheapest flight tickets to Colombo.

Flying from Tribhuvan International Airport (KTM) to Colombo: what you need to know

  • Around 3 hours 43 minutes is how long you can expect to be in the air on a direct flight from Tribhuvan International Airport to Colombo.

  • The timezone in Colombo is UTC+5:30. The city is 17 minutes behind Kathmandu, where Tribhuvan International Airport is located.

  • Tribhuvan International Airport (KTM) to Bandaranaike International Airport (CMB) is the most popular route, with 17 weekly flights to pick from. If you have things to do before leaving, the last flight from KTM to CMB is with SriLankan Airlines at 13:40. Choose the first departure operated by SriLankan Airlines at 12:50 if you want to fly out earlier.

  • Leave plenty of time to get on your flight from KTM to Colombo. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.

  • Travelling during a peak time like October? Public holidays and other high seasons can lead to longer lines and delays at check-in and security. Be extra cautious and get there up to four hours ahead of international flights and two hours before a domestic departure.

  • Direct flights from Tribhuvan International Airport (KTM) to Colombo are available for booking. Bandaranaike International Airport (CMB) will be your arrival point.

  • Book your seat with SriLankan Airlines. This leading carrier offers direct flights from Tribhuvan International Airport to Colombo.

  • Stopovers are the perfect opportunity to take a travel break — and maybe even explore another city. When browsing flights from KTM to Colombo, deselect the 'Direct flights only' box to see where you can stop along the way. Consider one of these popular options:

    • Suvarnabhumi Airport (BKK)

    • Indira Gandhi International Airport (DEL)

    • Chhatrapati Shivaji International Airport (BOM)

  • When travelling to Sri Lanka for tourism purposes, you'll need an e-visa if you have a passport from Nepal. However, visa rules can change and you may need additional documents depending on the purpose and duration of your trip. Always check the most recent guidelines before booking your cheap ticket from Tribhuvan International Airport to Colombo.

  • To reach KTM from central Kathmandu, it'll take around 16 minutes if you're planning to drive. Of course, this depends on traffic. It's approximately 5 kilometres from the airport to the city centre.

  • Catching an early flight from Tribhuvan International Airport to Colombo? Avoid rushing to the terminal (and sneak in some extra snooze time) by picking one of these stays close to KTM:

How to find the cheapest flights from Tribhuvan International Airport (KTM) to Colombo

  • ج.م.‏ 11,258 is the cheapest price we've seen for a one-way ticket from Tribhuvan International Airport to Colombo. For a return flight on this route, the best price is ج.م.‏ 20,997. Depending on when you book and the availability, these fares could change.

  • To secure cheap tickets from KTM to Colombo, book your trip 5 months ahead of the departure date.

  • Plan your trip for January. That's the cheapest month for tickets from Tribhuvan International Airport to Colombo. If you're flexible with your dates, use the 'Whole month' tool to find the lowest price across every month.

  • Create a Price Alert for cheap flight tickets from KTM to Colombo. There's no need to look every day to see if fares have dropped. We'll notify you as soon as there's a change in price.

  • Tailor your travel plans with filters. Choose your preferred arrival and departure times, total journey duration and airlines. You can also sort results by 'Fastest,' 'Cheapest' or 'Best' flights from Tribhuvan International Airport to Colombo.

Airports in Colombo

Colombo Ratmalana Airport (RML)

  • Colombo Ratmalana Airport (RML) is around 16 kilometres from the centre of Colombo. With a cab or in your own car rental, the drive is about 39 minutes.

  • If you're using public transport, expect a journey of roughly 1 hour and 16 minutes.

  • If you're arriving on a late flight from Tribhuvan International Airport to Colombo, few things beat the convenience of staying close to the terminal. Grab your suitcases from the carousel and then be showered and sleeping not long after at one of these accommodation options near RML:

Bandaranaike International Airport (CMB)

  • As soon as your flight from Tribhuvan International Airport to Colombo has hit the tarmac, you can reach the city centre in about 39 minutes by car. Central Colombo is roughly 32 kilometres from Bandaranaike International Airport (CMB).

  • You can also opt for public transport, which will take roughly 1 hour and 31 minutes.

  • After your flight from KTM to Colombo, tuck yourself in at a hotel near CMB. These are some comfortable accommodation options that'll help you switch to relaxation mode:

Best time to go to Colombo

  • Carefully consider your travel dates before scheduling your flight from Tribhuvan International Airport to Colombo. The city buzzes during high season, but hotel rates are typically higher and top attractions can be busy. Plan your trip to Colombo in low season if you want a quieter vibe.

  • Book your flight from Tribhuvan International Airport to Colombo for March to visit the city during its warmest month. Expect temperatures to range from 24ºC to 33ºC.

  • January sees average temperatures of between 22ºC and 32ºC. Search for cheap flights from KTM to Colombo around that time if you want to travel in cooler conditions.

More about Colombo

  • After booking your flight from Tribhuvan International Airport to Colombo, think about where you'd like to stay in this city. Make one of these options your base for exploring Colombo:

  • There are so many things to do and see in this city it can be hard to work out where to begin. Gangaramaya Temple, Independence Square & Independence Memorial Hall and Viharamahadevi Park are popular attractions which should feature on any well-planned Colombo itinerary.

Complete your Colombo trip with a car rental

  • We use the same magic that helped you find your cheap flight from Tribhuvan International Airport to Colombo to track down awesome deals on car rentals. Search for your ride in seconds and easily compare your options. Plus you'll find everything you need to know about car rentals in Colombo, from the most popular car type to the average daily price.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.