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Ko Samui

$1,262+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
HNL — USM
Nov 5 — Nov 121
Wed 11/5
Wed 11/12
1 adult, Economy
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Cheap flight deals from O'ahu to Ko Samui

Keep the following information in mind while searching for O'ahu to Ko Samui flight deals. Data was last updated October 6, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,262
(Cathay Pacific)
Provider with most accurate pricing for Honolulu-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for Honolulu-Ko Samui flights.
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From O'ahu to Ko Samui
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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 October 6, 2025.

This Cathay Pacific deal was found by Cheapflights users on 10/4. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1312:40 pmHNL - USM
2 stops37h 55mCathay Pacific
Mon 11/1711:40 amUSM - HNL
2 stops38h 45mCathay Pacific
Deal found 10/4$1,262

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 October 6, 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

Thu 11/13

12:40 pm-7:35 pm

2 stops37h 55m

Ko Samui

Mon 11/17

11:40 am-9:25 am

2 stops38h 45m

$1,262

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/3

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 October 6, 2025.

A simple way to save on the total cost of your ticket is to fly from O'ahu to Ko Samui in the afternoon. If you’re flexible enough to do this you can expect to save up to 64% on your trip compared to booking a flight in the morning.

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.

  • How long is the flight from O'ahu to Ko Samui?

    A quick flight from O'ahu to Ko Samui can take about 37h 55m. Cathay Pacific provides one of the quickest options available for as low as $1,262. The distance between O'ahu and Ko Samui is about 6733 mi.

  • 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 Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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