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 HI to USM?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Hawaii to Ko Samui as you normally would.

What airport do you fly into for flights to Ko Samui from Hawaii?

Ko Samui (USM) is the airport you will fly into if you book a flight from Hawaii to Ko Samui. It is only a 2.1 mi journey from Ko Samui (USM) to Ko Samui’s city center.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Hawaii 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.

$1,687+ Cheap Flights from Hawaii to Ko Samui

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Cheap flight deals from Hawaii to Ko Samui

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Cheapest flights from Hawaii to Ko Samui
Explore the most affordable flight options available from Hawaii to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 6, 2026.

Fri 9/1111:50 am

HNL

USM

2 stops40h 45m

Qantas Airways

Tue 9/152:35 pm

USM

HNL

2 stops36h 20m

Qantas Airways

Deal found 2/4

$9,011

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Route

Depart

Return

Price

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Tue 2/24

2:00 pm-9:20 am

2 stops26h 20m

Ko Samui

Thu 3/5

7:30 pm-12:43 pm

2 stops34h 13m

$1,687

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Tue 2/24

10:51 pm-10:40 am

3 stops42h 49m

Ko Samui

Thu 3/5

7:00 pm-7:59 pm

3 stops41h 59m

$2,128

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/5

Best time to book a flight from Hawaii to Ko Samui

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

HNL-USM

Estimated round-trip price

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Everything you need to know about your flight from Hawaii to Ko Samui

USHI-USM

HNL-USM

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly into for flights to Ko Samui from Hawaii?
Ko Samui (USM) is the airport you will fly into if you book a flight from Hawaii to Ko Samui. It is only a 2.1 mi journey from Ko Samui (USM) to Ko Samui’s city center.
Can I find deals for flights from Hawaii to Ko Samui that include hotel bookings?
Yes. In addition to deals on Hawaii to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Hawaii to Ko Samui?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Hawaii to Ko Samui.
Can I find deals for business class flights from Hawaii to Ko Samui?
Yes. Cheapflights offers flight deals from Hawaii 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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$1,687+ Cheap flights from Hawaii to Ko Samui (USM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/24. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Hawaii to Ko Samui with Cheapflights

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Cheap flight deals from Hawaii to Ko Samui

Cheapest flights from Hawaii to Ko SamuiExplore the most affordable flight options available from Hawaii to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 6, 2026.

Explore the most affordable flight options available from Hawaii to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 6, 2026.

Best flights from Hawaii to Ko SamuiDiscover carefully curated flight deals from Hawaii to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 6, 2026.

Discover carefully curated flight deals from Hawaii to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 6, 2026.

Last-minute flights from Hawaii to Ko SamuiDiscover last-minute flight deals from Hawaii to Ko Samui. Data last updated February 6, 2026 and is based on user searches.

Discover last-minute flight deals from Hawaii to Ko Samui. Data last updated February 6, 2026 and is based on user searches.

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Best time to book a flight from Hawaii to Ko Samui

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

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Everything you need to know about your flight from Hawaii to Ko Samui

Related info for your journey

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

What airport do you fly into for flights to Ko Samui from Hawaii?

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

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

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

Traveling to a place near Ko Samui?

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Alternative routes for Hawaii to Ko Samui

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Complete your trip

Complete your trip to Ko Samui by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Hawaii to Ko Samui by cabin class

Find flights from Hawaii to Ko Samui, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Ko Samui

Explore flights to Ko Samui departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on February 6, 2026.

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Cheapest flights from Hawaii to Ko Samui
Explore the most affordable flight options available from Hawaii to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 6, 2026.

Best flights from Hawaii to Ko Samui
Discover carefully curated flight deals from Hawaii to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 6, 2026.

Last-minute flights from Hawaii to Ko Samui
Discover last-minute flight deals from Hawaii to Ko Samui. Data last updated February 6, 2026 and is based on user searches.