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Cheap Flights from Kathmandu to Colombo

Compare Kathmandu to Colombo flight deals

Find the cheapest month or even day of the year to fly 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 Airport to Colombo? If you want to travel next month, return fares start from R 8,313. Find the lowest prices on one-way and return tickets right here.
Colombo.R 3,445 per passenger.Departing Sat, 19 Sep.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Sat, 19 Sep, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 3,445, select.
Colombo.R 3,452 per passenger.Departing Sat, 4 Jul.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Sat, 4 Jul, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 3,452, select.
Colombo.R 3,465 per passenger.Departing Wed, 19 Aug.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Wed, 19 Aug, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 3,465, select.
Colombo.R 3,472 per passenger.Departing Sun, 14 Jun.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Sun, 14 Jun, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 3,472, select.
Colombo.R 3,584 per passenger.Departing Thu, 3 Dec.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Thu, 3 Dec, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 3,584, select.
Colombo.R 3,765 per passenger.Departing Sat, 30 Jan.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Sat, 30 Jan, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 3,765, select.
Colombo.R 3,769 per passenger.Departing Sun, 28 Mar.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Sun, 28 Mar, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 3,769, select.
Colombo.R 3,777 per passenger.Departing Fri, 2 Apr.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Fri, 2 Apr, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 3,777, select.
Colombo.R 4,101 per passenger.Departing Mon, 2 Nov.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Mon, 2 Nov, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 4,101, select.
Colombo.R 4,411 per passenger.Departing Fri, 2 Oct.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Fri, 2 Oct, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 4,411, select.
Colombo.R 4,424 per passenger.Departing Sun, 28 Feb.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Sun, 28 Feb, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 4,424, select.
Colombo.R 4,430 per passenger.Departing Sat, 30 May.One-way flight with Air India.Outbound indirect flight with Air India, departs from Kathmandu on Sat, 30 May, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 4,430, select.
Colombo.R 5,366 per passenger.Departing Wed, 29 Apr.One-way flight with Nepal Airlines.Outbound indirect flight with Nepal Airlines, departs from Kathmandu on Wed, 29 Apr, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 5,366, select.
Colombo.R 5,764 per passenger.Departing Thu, 7 May.One-way flight with SriLankan Airlines.Outbound direct flight with SriLankan Airlines departs from Kathmandu on Thu, 7 May, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 5,764, select.
Colombo.R 5,773 per passenger.Departing Wed, 23 Sep.One-way flight with SriLankan Airlines.Outbound direct flight with SriLankan Airlines departs from Kathmandu on Wed, 23 Sep, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 5,773, select.
Colombo.R 5,780 per passenger.Departing Thu, 2 Jul.One-way flight with SriLankan Airlines.Outbound direct flight with SriLankan Airlines departs from Kathmandu on Thu, 2 Jul, arriving in Colombo Bandaranayake.Price includes taxes and charges.From R 5,780, select.

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 September.
Apr
from R 5,366
May
from R 4,430
Jun
from R 3,472
Jul
from R 3,452
Aug
from R 3,465
Sep
from R 3,445
Oct
from R 4,411
Nov
from R 4,101
Dec
from R 3,584
Jan
from R 3,765
Feb
from R 4,424
Mar
from R 3,769

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.

Kelaniya

10km from central Colombo
Closest
Search flights

Colombo Ratmalana

13km from central Colombo
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Colombo Bandaranayake

27km from central Colombo
Cheapest
from R 3,445
Search flights

Bentota River

52km from central Colombo
Search flights

Katugastota

72km from central Colombo
Search flights

Kathmandu to Colombo: Flight information

The things to know before you go.
Cheapest flight foundR 3,445
Cheapest month to flySeptember
Average flight time3 hrs, 35 mins
Most popular airlineSriLankan Airlines
Average flights per week10

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 R 6,670. 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 35 minutes is the average flight time from Kathmandu to Colombo.
SriLankan Airlines flies direct from Kathmandu to Colombo.
As of April 2026, there are 5 flights per week flying from Kathmandu to Colombo.
The cheapest month to fly from Kathmandu to Colombo is usually July.
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 R 6,670.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Kathmandu Airport to Colombo on Wednesday, 29 July 2026.
Yes – the average flight time is 3 hours and 35 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.

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

  • The average duration of a direct flight from Tribhuvan International Airport to Colombo is 3 hours 40 minutes.

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

  • Tribhuvan International Airport (KTM) to Bandaranaike International Airport (CMB) is the most traveled route, with four weekly departures to choose from. You can travel from KTM to CMB at 12:50 with SriLankan Airlines.

  • To avoid missing your KTM to Colombo flight, leave enough time to check in and drop off your luggage. Arriving two hours ahead of international departures and an hour before domestic flights is the general travel rule.

  • During popular months such as October, it's a good idea to get to the airport even earlier. Arrive two hours before a domestic departure and four hours ahead for international flights when you fly during a peak period in general.

  • Start your trip at KTM and travel nonstop to Bandaranaike International Airport (CMB). That's where you can expect to touch down when searching for Tribhuvan International Airport to Colombo tickets.

  • Look out for promotions from SriLankan Airlines. This carrier operates direct flights from Tribhuvan International Airport to Colombo.

  • Consider adding a stopover to potentially unlock a cheaper plane ticket from KTM to Colombo. Just deselect 'Direct flights only' during your search. Take a detour (and maybe pocket some savings) by stopping at one of these popular options:

    • Indira Gandhi International Airport (DEL)

    • Suvarnabhumi Airport (BKK)

    • Chhatrapati Shivaji International Airport (BOM)

  • Central Kathmandu to KTM is around 3 kilometres. Depending on traffic conditions, it'll take about 15 minutes to get there if you're ride-sharing, catching a cab or driving.

  • Have an early flight from Tribhuvan International Airport to Colombo? Avoid the last-minute rush to the terminal (and catch some extra z's) by choosing one of these hotels near KTM:

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

  • The best price we've found for a one-way Tribhuvan International Airport to Colombo flight is R 3,445. The cheapest price for a return flight is R 6,670. Remember fares can change due to demand at the time of booking.

  • To score cheap flights from KTM to Colombo, reserve your journey nine months ahead of your planned departure.

  • January is the best month for landing an amazing deal on Tribhuvan International Airport to Colombo tickets. If you want to travel during a different time of year, the 'Whole month' tool will give you the lowest prices for each month.

  • You don't need to check in daily to see if fares have dropped when you create a Price Alert. We'll notify you when there's an updated deal for cheap flights from KTM to Colombo.

  • Find an affordable flight from Tribhuvan International Airport to Colombo with the help of our filters. Select your preferred duration, departure time and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in Colombo

Colombo Ratmalana Airport (RML)

  • Colombo Ratmalana Airport (RML) is around 16 kilometres from the centre of Colombo. If you're getting a taxi or a ride-share, the drive takes about 40 minutes.

  • Travelling to the centre by public transport takes around 1 hour 15 minutes.

  • If you're coming in on a late flight from Tribhuvan International Airport to Colombo, nothing beats the convenience of staying close to the terminal. Grab your suitcases from the carousel and then be showered and snoozing soon after at one of these hotels near RML:

Bandaranaike International Airport (CMB)

  • Bandaranaike International Airport (CMB) is about 32 kilometres from central Colombo. Following your flight from Tribhuvan International Airport to Colombo, it'll take you around 40 minutes to get to the heart of the city in a cab or ride-share.

  • Public transport will get you there in about 1 hour 30 minutes.

  • Hang the 'Do not disturb' sign on your door and relax at a hotel close to CMB. Here are a few options where you can put your feet up after your KTM to Colombo flight:

  • No need to worry about public transport schedules or long cab queues. Grab a Bandaranaike International Airport rental car and let the journey unfold your way. Check out the rates and availability from Sr Rent A Car, Green Motion and Sixt.

  • Avoid paying extra. Booking your ride two weeks ahead of your arrival at CMB can land you a better rate.

Best time to go to Colombo

  • Carefully consider your travel dates before booking your flight from Tribhuvan International Airport to Colombo. The city buzzes during high season, but prices are typically higher and attractions can get crowded. Plan your trip to Colombo in the low season if you want a more relaxed vibe.

  • Book a Tribhuvan International Airport to Colombo plane ticket with a departure in March to explore the city during its warmest month. Expect temperatures to range from 24ºC (75ºF) to 33ºC (91ºF).

  • If you like cooler conditions, search for a cheap ticket from KTM to Colombo in January when temperatures average between 22ºC (72ºF) and 32ºC (90ºF).

More about Colombo

  • When it comes to looking for somewhere to lay your head, you'll find the most popular stays in Colombo right here. Check out these options once you've locked in your flight from Tribhuvan International Airport to Colombo:

  • There are so many things to see and do in this city it can be difficult to know where to start. Independence Square & Independence Memorial Hall, Gangaramaya Temple and Viharamahadevi Park are top sights which should feature on any good Colombo itinerary.

Explore more of Sri Lanka

  • Colombo has its own special appeal, but there are so many other parts of Sri Lanka you'll want to see. About 306 kilometres north of Colombo, a trip to Jaffna will keep you on the move. Check out popular attractions like Jaffna Fort, Dambakola Patuna Sangamitta Temple and Jaffna Public Library.

  • Around 241 kilometres north-east of Colombo, Trincomalee is another favourite stop in Sri Lanka. Experience the best of this destination with a visit to Koneswaram Temple, Fort Frederick and Marble Beach.

Plan the rest of your trip from Kathmandu to Colombo

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