Cheap flights from Koh Samui to Colombo

Koh Samui
USM
Bandaranaike
CMB

Flight deals from Koh Samui to Colombo

Below you can see the best deals on flights Koh Samui — Colombo for upcoming dates. Direct and connecting flights from various airlines — compare prices and choose the right ticket.

The lowest price for the next 2 months is on 30 September, from $270.

Top 10 cheap flights from Koh Samui to Colombo

TG
TG
$ 334

Koh Samui — Colombo

18:45—23:55
9 Aug 2026
6 h 40 m
1 stop
TG
TG
$ 334

Koh Samui — Colombo

17:40—23:55
9 Aug 2026
7 h 45 m
1 stop
PG
FD
$ 365

Koh Samui — Colombo

21:25—22:15
11 Aug 2026
26 h 20 m
1 stop
PG
FD
$ 365

Koh Samui — Colombo

20:40—22:15
11 Aug 2026
27 h 5 m
1 stop
PG
FD
$ 365

Koh Samui — Colombo

12:10—22:15
12 Aug 2026
11 h 35 m
1 stop
PG
FD
$ 365

Koh Samui — Colombo

10:00—22:15
12 Aug 2026
13 h 45 m
1 stop
PG
FD
$ 365

Koh Samui — Colombo

07:50—22:15
12 Aug 2026
15 h 55 m
1 stop
PG
FD
$ 365

Koh Samui — Colombo

07:30—22:15
12 Aug 2026
16 h 15 m
1 stop
PG
FD
$ 365

Koh Samui — Colombo

21:25—22:15
12 Aug 2026
26 h 20 m
1 stop
PG
FD
$ 365

Koh Samui — Colombo

19:50—22:15
12 Aug 2026
27 h 55 m
1 stop

Prices were found in the last 72 hours and may change — check the exact price when you continue.

When is the best time to book a flight from Koh Samui to Colombo?

The price of a flight from Koh Samui to Colombo changes depending on how far ahead you book. For the best chance of a lower fare, book around 23 days before departure, when the average ticket costs about $638. Fares also tend to climb as the departure date gets closer.

About the Koh Samui — Colombo flight

Looking for cheap flights from Koh Samui to Colombo? There are no direct flights on this route, but you can compare convenient connections and fares from different airlines, then book your Koh Samui — Colombo ticket online.

There are no direct flights — tickets are sold with a connection (usually via Phuket International Airport, Kuala Lumpur International Airport), the whole trip with a connection takes about 15 h 25 min, flights are operated by Bangkok Airways, Thai Airways, AirAsia, SriLankan Airlines, the distance between the cities is around 2,238 km.

Planning your trip? You may find our Colombo travel guide, how to get from the airport into town and Colombo weather forecast useful. To catch a low fare, use the low-price calendar and the monthly price chart on this page.

Facts about this route

from $270Min. price
SeptemberCheapest
MarchPeak season
NoDirect flights
2,238 kmDistance
7 hTravel time

Flight ticket prices by day: Koh Samui — Colombo

Below is a calendar of the lowest flight ticket prices for Koh Samui — Colombo by day. Pick a convenient date and instantly see the fare. The cheapest flights on this route start from $270 in September, and the most expensive are around $335 in March. If your travel dates are flexible, the calendar will help you find the best price for your preferred period. To view round-trip fares, switch to the "Round trip" tab above the calendar, select your departure date — and the right-hand calendar will highlight the lowest prices for return flights on each day.

 
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Prices by month

Average one-way fares from Koh Samui to Colombo by month. Tickets are usually cheapest in October (around $288) and priciest in December (about $392) — use the table and chart below to pick the best time to fly.

MonthAverage priceLevelMonthAverage priceLevelMonthAverage priceLevel
Jan$380highMay$368highSep$294low
Feb$355mediumJun$362highOct$288low
Mar$331mediumJul$319mediumNov$313medium
Apr$319mediumAug$331mediumDec$392high

Some values are estimated based on seasonality.

When to fly

Weather in Colombo: it is warmest in February (up to 32 °C on average) and coolest in August (around 29 °C). The driest month is February.

Tickets are usually cheapest in September and most expensive in March. Compare prices and weather by month in the charts below to pick the best time to fly.

Temperature · Colombo

Dry and wet days · Colombo

Wind speed and direction · Colombo

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How to get the best deal on a Koh Samui — Colombo ticket

  • Book ahead: fares for Koh Samui — Colombo are usually lower 3–8 weeks before departure than at the last minute.
  • Play with your dates — Tuesday, Wednesday and Saturday departures are often cheaper than Friday and Sunday.
  • The cheapest month to fly to Colombo is usually September — plan your trip around it if your dates are flexible.
  • There are no direct flights — travellers usually connect via Phuket International Airport, Kuala Lumpur International Airport. Compare different connections: a layover adds time but lowers the price.
  • Watch the low-price calendar and the monthly price trend on this page — they make it easier to catch a good date.
  • Travelling light? Pick a cabin-baggage-only fare — tickets without checked luggage are noticeably cheaper.
  • Get to the airport in good time — about 2–3 hours before an international departure and roughly an hour before a domestic one.

Airlines

Flights on the Koh Samui — Colombo route are operated by 4 airlines; Bangkok Airways runs the most flights. There are no direct flights — compare carriers and convenient connections below.

There are no direct flights on the Koh Samui — Colombo route. Showing airlines offering connecting flights.
  • Bangkok AirwaysPG
    WebsiteFleet: 254.3M pax/year
    • USM → BKK → CMB (with stopover)
    • USM → HKT → KUL → CMB (with stopover)
    Open →
  • Thai AirwaysTG
    WebsiteFleet: 7715M pax/year
    • USM → BKK → CMB (with stopover)
    Open →
  • AirAsiaAK
    WebsiteFleet: 10523.9M pax/year
    • USM → HKT → KUL → CMB (with stopover)
    Open →
  • SriLankan AirlinesUL
    WebsiteFleet: 244.5M pax/year
    • USM → BKK → CMB (with stopover)
    Open →

Cities and airports on the Koh Samui — Colombo route

Flights Koh Samui — Colombo depart from Koh Samui Airport and arrive at Bandaranaike International Airport. Below are pages for the cities, countries, and airports on the route: airlines, schedules, and travel guides.

Departure

Koh Samui

USM
Thailand
About the cityHow to get thereWeatherAll about the country Thailand
Arrival

Colombo

CMB
Sri Lanka
About the cityHow to get thereWeatherAll about the country Sri Lanka
Departure airports
Arrival airports

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Frequently asked questions about the Koh Samui — Colombo flight

How long is the flight from Koh Samui to Colombo?

There are no direct flights, so travel time depends on the connection in Phuket International Airport, Kuala Lumpur International Airport. Based on search data, the whole trip takes about 15 h 25 min including the layover.

How far is it from Koh Samui to Colombo?

The distance from Koh Samui to Colombo is about 2,238 km.

Are there direct flights from Koh Samui to Colombo?

There are no nonstop flights on this route — tickets are only available with a connection (usually via Phuket International Airport, Kuala Lumpur International Airport).

Which airlines fly from Koh Samui to Colombo?

Airlines operating Koh Samui — Colombo include Bangkok Airways, Thai Airways, AirAsia, SriLankan Airlines. See the full list with schedules in the "Airlines" section on this page.

Which airports do Koh Samui — Colombo flights use?

Flights from Koh Samui depart from Koh Samui Airport, and arrive at Bandaranaike International Airport. If a city has more than one airport, check which one your ticket uses before you travel.

How much is a ticket from Koh Samui to Colombo?

The price of a Koh Samui — Colombo ticket depends on your travel date, season and demand: it is usually cheapest to fly in September, and most expensive in March. Tickets typically cost between $270 and $335. Check the current lowest fare and low-price calendar on this page.

When is the best time to book flights Koh Samui — Colombo?

Flights Koh Samui — Colombo are usually cheaper when booked in advance — a few weeks before departure and away from peak dates; the most budget-friendly month to fly is September. Compare prices by month in the price trend chart on this page.

How can I find the cheapest flights from Koh Samui to Colombo?

To catch a low fare Koh Samui — Colombo, book a few weeks in advance, keep your dates flexible, and compare airlines and connecting options. The low-price calendar and monthly price chart on this page show the cheapest days and months at a glance: the most budget-friendly month to fly is usually September.

How early should I arrive at the airport?

For international flights, plan to be at the airport about 2–3 hours before departure, and around an hour before a domestic flight. Allow extra time during busy travel seasons and at large hubs, where check-in and security lines can be longer.

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