HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ko Samui

$728+ Cheap flights from O'ahu 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
HNL — USM
Aug 16 — Aug 231
Sat 8/16
Sat 8/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from O'ahu to Ko Samui with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 August 11, 2025.

Round-trip from

$1,094
(Trip.com)
From O'ahu to Ko Samui
Search Deals

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 August 11, 2025.

This Trip.com deal was found by Cheapflights users on 8/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/312:55 pmHNL - USM
2 stops36h 55mMultiple Airlines
Sun 9/78:00 amUSM - HNL
2 stops42h 45mMultiple Airlines
Deal found 8/10$1,094
This FlightHub deal was found by Cheapflights users on 8/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/3012:20 pmHNL - USM
2 stops28h 00mMultiple Airlines
Sat 9/67:10 pmUSM - HNL
2 stops32h 30mMultiple Airlines
Deal found 8/10$1,120
This FlightHub deal was found by Cheapflights users on 8/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1312:20 pmHNL - USM
2 stops26h 00mMultiple Airlines
Fri 9/269:00 pmUSM - HNL
2 stops30h 40mMultiple Airlines
Deal found 8/10$1,167
This SmartFares deal was found by Cheapflights users on 8/10. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3111:50 amHNL - USM
2 stops37h 45mCathay Pacific
Sun 9/710:55 amUSM - HNL
3 stops39h 25mCathay Pacific
Deal found 8/10$1,587
This Cathay Pacific deal was found by Cheapflights users on 8/8. 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 9/181:35 pmHNL - USM
2 stops36h 00mCathay Pacific
Mon 9/2210:55 amUSM - HNL
2 stops41h 05mCathay Pacific
Deal found 8/8$1,649
This Philippine Airlines deal was found by Cheapflights users on 8/10. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/212:55 pmHNL - USM
2 stops38h 55mPhilippine Airlines
Mon 9/86:55 pmUSM - HNL
2 stops33h 15mPhilippine Airlines
Deal found 8/10$1,685
This Philippine Airlines deal was found by Cheapflights users on 8/10. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2812:55 pmHNL - USM
2 stops50h 40mPhilippine Airlines
Wed 9/107:15 pmUSM - HNL
2 stops32h 55mPhilippine Airlines
Deal found 8/10$1,690
This Philippine Airlines deal was found by Cheapflights users on 8/10. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/212:55 pmHNL - USM
2 stops38h 55mPhilippine Airlines
Tue 9/95:25 pmUSM - HNL
2 stops58h 45mPhilippine Airlines
Deal found 8/10$1,696
This Philippine Airlines deal was found by Cheapflights users on 8/10. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2812:55 pmHNL - USM
2 stops50h 20mPhilippine Airlines
Tue 9/97:15 pmUSM - HNL
2 stops56h 55mPhilippine Airlines
Deal found 8/10$1,701
This Philippine Airlines deal was found by Cheapflights users on 8/10. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/3012:55 pmHNL - USM
2 stops38h 55mPhilippine Airlines
Wed 9/107:10 pmUSM - HNL
2 stops33h 00mPhilippine Airlines
Deal found 8/10$1,716

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 August 11, 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 8/31

2:55 pm-8:50 pm

2 stops36h 55m

Ko Samui

Sun 9/7

8:00 am-9:45 am

2 stops42h 45m

$1,094

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Sat 8/30

12:20 pm-9:20 am

2 stops28h 00m

Ko Samui

Sat 9/6

7:10 pm-10:40 am

2 stops32h 30m

$1,120

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Sat 9/13

12:20 pm-7:20 am

2 stops26h 00m

Ko Samui

Fri 9/26

9:00 pm-10:40 am

2 stops30h 40m

$1,167

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Sun 8/31

11:50 am-6:35 pm

2 stops37h 45m

Ko Samui

Sun 9/7

10:55 am-9:20 am

3 stops39h 25m

$1,587

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Thu 9/18

1:35 pm-6:35 pm

2 stops36h 00m

Ko Samui

Mon 9/22

10:55 am-11:00 am

2 stops41h 05m

$1,649

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Tue 9/2

12:55 pm-9:35 pm

2 stops39h 40m

Ko Samui

Wed 9/10

5:25 pm-11:10 am

2 stops34h 45m

$1,685

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Thu 8/28

12:55 pm-8:35 am

2 stops50h 40m

Ko Samui

Wed 9/10

7:15 pm-11:10 am

2 stops32h 55m

$1,690

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Tue 9/2

12:55 pm-8:50 pm

2 stops38h 55m

Ko Samui

Tue 9/9

5:25 pm-11:10 am

2 stops58h 45m

$1,696

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Thu 8/28

12:55 pm-8:15 am

2 stops50h 20m

Ko Samui

Tue 9/9

7:15 pm-11:10 am

2 stops56h 55m

$1,701

HonoluluKo Samui

HNL - USM

HNLUSM

Honolulu

Sat 8/30

12:55 pm-8:50 pm

2 stops38h 55m

Ko Samui

Wed 9/10

7:10 pm-11:10 am

2 stops33h 00m

$1,716

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 12 results
1
2

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 August 11, 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.

Reviews of airlines servicing Ko Samui

Get insights into the airlines that provide service to Ko Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ko Samui. Reviews last updated August 11, 2025.
See what other customers who have flown with Singapore Airlines, Cathay Pacific, and Qatar Airways from O'ahu to Ko Samui have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,346 reviews

Overall

8.1

Entertainment

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Singapore Airlines
8.1
Very good
1,346 reviews
Singapore Airlines
8.1
Very good
1,346 reviews

Overall

8.1

Entertainment

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Cathay Pacific
7.6
Good
965 reviews
Singapore Airlines
8.1
Very good
1,346 reviews

Overall

8.1

Entertainment

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Qatar Airways
7.4
Good
3,605 reviews
Singapore Airlines
8.1
Very good
1,346 reviews

Overall

8.1

Entertainment

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Philippine Airlines
7.2
Good
894 reviews
Singapore Airlines
8.1
Very good
1,346 reviews

Overall

8.1

Entertainment

8.0

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered

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 Ko Samui?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.