In terms of precipitation, rainfall in Ko Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Ko Samui when rainfall is around 2.3 in.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

What is the cheapest time of day to fly from HNL to USM?

When flying from Honolulu to Ko Samui, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Honolulu-Ko Samui flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Honolulu-Ko Samui flight deals on Cheapflights vs. AranGrant 90-95% of the time. Price accuracy is based on data collected from Honolulu-Ko Samui flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Honolulu-Ko Samui flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Honolulu-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Honolulu to Ko Samui that include hotel bookings?

Yes. In addition to deals on Honolulu to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Honolulu to Ko Samui?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Honolulu to Ko Samui.

Can I find deals for business class flights from Honolulu to Ko Samui?

Yes. Cheapflights offers flight deals from Honolulu to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$807+ Flights from Honolulu to Ko Samui

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Cheapest flights from Honolulu to Ko Samui
Explore the most affordable flight options available from Honolulu to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.

Fri 9/1111:50 am

HNL

USM

2 stops40h 00m

Qantas Airways

Tue 9/152:00 pm

USM

HNL

2 stops36h 55m

Qantas Airways

Deal found 1/31

$8,937

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Most accurate provider	AranGrant 2 stars
Most trusted provider	AranGrant 2 stars

Provider with most accurate pricing for Honolulu-Ko Samui flight deals.

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Depart

Return

Price

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Sat 2/14

12:10 pm-7:35 am

2 stops26h 25m

$807

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Sat 2/14

10:55 pm-6:15 pm

3 stops50h 20m

$1,497

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Most accurate provider: When it comes to deals on Honolulu-Ko Samui flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Honolulu-Ko Samui flight deals on Cheapflights vs. AranGrant 90-95% of the time. Price accuracy is based on data collected from Honolulu-Ko Samui flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Honolulu-Ko Samui flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Honolulu-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Honolulu to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Honolulu with our price prediction graph.

HNL-USM

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Can I find deals for flights from Honolulu to Ko Samui that include hotel bookings?
Yes. In addition to deals on Honolulu to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Honolulu to Ko Samui?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Honolulu to Ko Samui.
Can I find deals for business class flights from Honolulu to Ko Samui?
Yes. Cheapflights offers flight deals from Honolulu to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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$807+ Cheap flights from Honolulu (HNL) to Ko Samui (USM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/14. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapest flights from Honolulu to Ko SamuiExplore the most affordable flight options available from Honolulu to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.

Explore the most affordable flight options available from Honolulu to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.

One-way flights from Honolulu to Ko SamuiSearch for one-way flight options from Honolulu to Ko Samui. Find affordable one-way fares based on user searches. Data last updated February 4, 2026.

Search for one-way flight options from Honolulu to Ko Samui. Find affordable one-way fares based on user searches. Data last updated February 4, 2026.

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Related info for your journey

Find useful and relevant information for your journey from Honolulu to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Honolulu to Ko Samui that include hotel bookings?

How can I find direct flights from Honolulu to Ko Samui?

Can I find deals for business class flights from Honolulu to Ko Samui?

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Cheapest flights from Honolulu to Ko Samui
Explore the most affordable flight options available from Honolulu to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.

One-way flights from Honolulu to Ko Samui
Search for one-way flight options from Honolulu to Ko Samui. Find affordable one-way fares based on user searches. Data last updated February 4, 2026.