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Ko Samui

$1,760+ Cheap flights from O'ahu 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
HNL — USM
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Find flight deals from O'ahu to Ko Samui

Cheapest flights from O'ahu to Ko Samui
Explore the most affordable flight options available from O'ahu to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This Mytrip deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/111:50 amHNL - USM
3 stops27h 00mMultiple Airlines
Sat 6/76:55 pmUSM - HNL
2 stops32h 15mMultiple Airlines
Deal found 4/30$1,760

Cheapflights Fare Finder

Customize your flight search to find flights from O'ahu to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 1, 2025.
Use the filters below to find and compare flights from O'ahu to Ko Samui that are best for you.

Fly from

O'ahu

Fly to

Ko Samui

Route

Depart

Return

Price

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Sun 6/1

11:50 am-7:50 am

3 stops27h 00m

Ko Samui

Sat 6/7

6:55 pm-10:10 am

2 stops32h 15m

$1,760

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Best time to book a flight from O'ahu to Ko Samui

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

Cheapflights Insights

Everything you need to know about your flight from O'ahu to Ko Samui

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

Find hourly flight availability from O'ahu to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

When flying from O'ahu 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.

Rainfall in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average rainfall totals by month.

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.

Temperature in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average temperature totals by month.

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).

Related info for your journey

Find useful and relevant information for your journey from O'ahu 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 O'ahu?

    If you book a flight to Ko Samui from O'ahu, you will be flying to Ko Samui, which is the city’s only airport. Ko Samui (USM) is located 2.1 mi from the center of Ko Samui.

  • Can I find deals for flights from O'ahu to Ko Samui that include hotel bookings?

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

  • How can I find direct flights from O'ahu to Ko Samui?

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

  • Can I find deals for business class flights from O'ahu to Ko Samui?

    Yes. Cheapflights offers flight deals from O'ahu 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.

See more FAQs

Traveling to a place near O'ahu?

Book flights to O'ahu if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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