Cheap Flights from Kathmandu to Samui International

Compare Kathmandu to Samui International flight deals

Find the cheapest month or even day of the year to fly to Samui International

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Flight deals from Kathmandu to Samui International

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

Koh Samui.$462 per passenger.Departing Thu, Sep 11, returning Fri, Sep 26.Round-trip flight with Thai AirAsia and Bangkok Airways.Outbound indirect flight with Thai AirAsia, departing from Kathmandu on Thu, Sep 11, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departing from Samui International on Fri, Sep 26, arriving in Kathmandu.Price includes taxes and charges.From $462, select.

Koh Samui.$562 per passenger.Departing Thu, Jul 31, returning Mon, Sep 15.Round-trip flight with Nepal Airlines and Bangkok Airways.Outbound indirect flight with Nepal Airlines, departing from Kathmandu on Thu, Jul 31, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departing from Samui International on Mon, Sep 15, arriving in Kathmandu.Price includes taxes and charges.From $562, select.

Koh Samui.$570 per passenger.Departing Wed, Oct 1, returning Sat, Oct 11.Round-trip flight with Thai AirAsia and Bangkok Airways.Outbound indirect flight with Thai AirAsia, departing from Kathmandu on Wed, Oct 1, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departing from Samui International on Sat, Oct 11, arriving in Kathmandu.Price includes taxes and charges.From $570, select.

Koh Samui.$620 per passenger.Departing Sun, Aug 10, returning Sun, Aug 17.Round-trip flight with Thai LionAir and Bangkok Airways.Outbound indirect flight with Thai LionAir, departing from Kathmandu on Sun, Aug 10, arriving in Samui International.Inbound indirect flight with Bangkok Airways, departing from Samui International on Sun, Aug 17, arriving in Kathmandu.Price includes taxes and charges.From $620, select.

Koh Samui.$798 per passenger.Departing Fri, Aug 29, returning Mon, Sep 8.Round-trip flight with Thai Airways.Outbound indirect flight with Thai Airways, departing from Kathmandu on Fri, Aug 29, arriving in Samui International.Inbound indirect flight with Thai Airways, departing from Samui International on Mon, Sep 8, arriving in Kathmandu.Price includes taxes and charges.From $798, select.

Find the cheapest month to fly from Kathmandu to Samui International

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

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Kathmandu to Samui International: Alternative routes

Compare routes from Kathmandu to Koh Samui below. You may find an airport to fly into that's cheaper, faster, or easier than Samui International.

Kathmandu to Koh Samui: Flight information

The things to know before you go.

Cheapest flight found	$462
Cheapest month to fly	September

Finding cheap flights from Kathmandu to Samui International: Frequently asked questions

How much are round-trip flights from Kathmandu to Samui International?

The best price we found for a round-trip flight from Kathmandu to Samui International is $462. 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.

Which airlines fly direct from Kathmandu to Samui International?

Currently, there are no airlines that fly direct from Kathmandu to Samui International. But we found flights with one or more stops from $462.

How many flights are there a week from Kathmandu to Samui International?

There are no flights flying from Kathmandu to Samui International, as of July 2025.

When is the cheapest time to fly from Kathmandu to Samui International?

The cheapest month to fly from Kathmandu to Samui International is usually September.

Which upcoming date is cheapest to fly from Kathmandu Airport to Samui International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Kathmandu Airport to Samui International Airport on Thursday, September 11, 2025.

Can I get a direct flight from Kathmandu Airport to Samui International Airport?

No airlines currently offer direct flights between Kathmandu Airport and Samui International Airport. Most routes have one or more stops.

How can I find the best flight deal to Samui International?

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 Samui International 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.

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

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Koh Samui is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly with from Kathmandu Airport to Samui International?

Currently, Thai AirAsia offers the cheapest flight tickets to Samui International.

Flying from Tribhuvan International Airport (KTM) to Koh Samui Airport (USM): what you need to know

For a stress-free journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This way, you'll have plenty of time to catch your KTM to USM flight.
Traveling during a peak month such as September? Major public holidays and other high seasons can lead to longer lines at check-in and security. Be extra cautious and get there up to four hours before an international flight and two hours before domestic departures.
We make it a piece of cake to book a flight with a stopover. To see your options for tickets from Tribhuvan International Airport to Koh Samui Airport, uncheck 'Direct flights only.' Then, choose a flight that has a stop long enough to explore your chosen city. Stopovers between KTM and USM include:
- Suvarnabhumi Airport
- Changi International Airport
- Don Mueang International Airport

How to find the cheapest flights from Tribhuvan International Airport (KTM) to Koh Samui Airport (USM)

$229 is the lowest price for a one-way Tribhuvan International Airport to Koh Samui Airport flight. Return flights start at $462. These fares may change depending on availability and demand.
It's often best to book in advance if you're looking for cheap tickets from KTM to USM. That's because airlines adjust prices based on demand, which tends to increase closer to departure.
Getting cheap flights from Tribhuvan International Airport to Koh Samui Airport is easier if you can be flexible with your trip dates. Use the 'Whole month' tool to see the lowest fares across the month and score a great deal.
You don't need to check back in every day to find out if fares have gone down when you set up a Price Alert. We'll update you the moment there's a new deal on cheap flights from KTM to USM.
Pick your ideal arrival and departure times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Tribhuvan International Airport to Koh Samui Airport.

Handy information about Tribhuvan International Airport (KTM)

To get to Tribhuvan International Airport from central Kathmandu, it'll take about 15 minutes if you're traveling by car. Of course, this depends on traffic. It's approximately 5 kilometers from the airport to the city center.
Get your travels off to a relaxed start by staying near KTM. Whether you've booked an early flight from Tribhuvan International Airport to Koh Samui Airport or just don't want to be rushed, these hotels are perfect:

Arriving at Koh Samui Airport (USM)

If you're arriving on a late Tribhuvan International Airport to Koh Samui Airport flight, nothing beats the convenience of being near the terminal. Grab your bags from the carousel and then be showered and relaxing soon after at one of these hotels near USM:
Get on the fast track to adventure by picking up a Koh Samui Airport rental car. Grab a set of wheels from asap car rental, Hertz or Drive Car Rental and explore beyond Koh Samui's main sights.
Booking your ride from Koh Samui Airport around four weeks ahead can help you get the lowest rate.

Getting from Koh Samui Airport (USM) to central Koh Samui

Koh Samui Airport to central Koh Samui is about 3 kilometers. Journey times may vary depending on traffic and the time of day, so checking a navigation app for real-time information is recommended.

When to fly to Koh Samui Airport (USM)

It's time to pick your trip dates for your flight from Tribhuvan International Airport to Koh Samui Airport. July is the most popular month to visit Koh Samui. If you like a quieter vibe, go in February.

Explore more of Thailand

Bangkok is just one of the many cities in Thailand waiting to be explored once you've taken in the sights of Koh Samui. Around 467 kilometers away to the north, top sights here include Grand Palace, Wat Arun and Wat Phra Kaew.
Around 434 kilometers north of Koh Samui, Chon Buri is another essential stop in Thailand. Experience this destination's highlights firsthand at Wat Ton Son, Forest and Phra Phutthasihing Hall.