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Ko Samui

$938+ Cheap flights from O'Hare Intl (ORD) 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — USM
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
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Cheap flight deals from O'Hare Intl to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 16, 2025.

Round-trip from

$938
(Trip.com)

Popular in

December

Cheapest in

November

Average price

$1,531
From Chicago O'Hare Intl to Ko Samui
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($274 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($96 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
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Find flight deals from O'Hare Intl to Ko Samui

Cheapest flights from O'Hare Intl to Ko Samui
Explore the most affordable flight options available from O'Hare Intl to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

This Trip.com deal was found by Cheapflights users on 8/14. 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.
Wed 10/224:00 pmORD - USM
2 stops40h 50mMultiple Airlines
Thu 10/307:00 amUSM - ORD
2 stops43h 00mMultiple Airlines
Deal found 8/14$938
This oojo deal was found by Cheapflights users on 8/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:20 pmORD - USM
2 stops33h 05mTurkish Airlines
Wed 11/197:00 pmUSM - ORD
2 stops28h 05mTurkish Airlines
Deal found 8/13$946
This Trip.com deal was found by Cheapflights users on 8/15. 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.
Fri 11/72:40 pmORD - USM
2 stops39h 15mMultiple Airlines
Fri 11/147:00 amUSM - ORD
2 stops43h 00mMultiple Airlines
Deal found 8/15$954
This Ovago deal was found by Cheapflights users on 8/14. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/95:30 pmORD - USM
2 stops25h 00mMultiple Airlines
Wed 11/195:05 pmUSM - ORD
2 stops33h 30mMultiple Airlines
Deal found 8/14$958
This Japan Airlines deal was found by Cheapflights users on 8/14. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/191:05 amORD - USM
2 stops29h 25mMultiple Airlines
Mon 9/297:15 pmUSM - ORD
2 stops25h 50mMultiple Airlines
Deal found 8/14$971
This Travelocity deal was found by Cheapflights users on 8/15. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/811:45 pmORD - USM
2 stops30h 15mMultiple Airlines
Wed 10/157:00 pmUSM - ORD
2 stops26h 40mMultiple Airlines
Deal found 8/15$1,047
This Turkish Airlines deal was found by Cheapflights users on 8/15. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/48:20 pmORD - USM
2 stops33h 05mTurkish Airlines
Fri 11/143:35 pmUSM - ORD
2 stops39h 50mTurkish Airlines
Deal found 8/15$1,097
This FlightHub deal was found by Cheapflights users on 8/15. 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.
Thu 9/412:30 amORD - USM
2 stops33h 05mMultiple Airlines
Wed 9/178:45 amUSM - ORD
2 stops24h 00mMultiple Airlines
Deal found 8/15$1,150
This Turkish Airlines deal was found by Cheapflights users on 8/15. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/511:25 amORD - USM
2 stops42h 50mTurkish Airlines
Wed 9/177:30 pmUSM - ORD
2 stops26h 10mTurkish Airlines
Deal found 8/15$1,153

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl 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 16, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Ko Samui that are best for you.

Fly from

O'Hare Intl

Fly to

Ko Samui

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 10/22

4:00 pm-8:50 pm

2 stops40h 50m

Ko Samui

Thu 10/30

7:00 am-2:00 pm

2 stops43h 00m

$938

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 11/9

8:20 pm-6:25 pm

2 stops33h 05m

Ko Samui

Wed 11/19

7:00 pm-10:05 am

2 stops28h 05m

$946

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 11/9

5:30 pm-7:30 am

2 stops25h 00m

Ko Samui

Wed 11/19

5:05 pm-1:35 pm

2 stops33h 30m

$958

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 9/19

1:05 am-6:30 pm

2 stops29h 25m

Ko Samui

Mon 9/29

7:15 pm-9:05 am

2 stops25h 50m

$971

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 9/27

7:50 pm-8:15 am

2 stops24h 25m

Ko Samui

Sat 10/4

7:10 pm-9:40 am

2 stops26h 30m

$1,003

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 10/8

11:45 pm-6:00 pm

2 stops30h 15m

Ko Samui

Wed 10/15

7:00 pm-9:40 am

2 stops26h 40m

$1,047

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 9/28

11:25 am-8:15 am

2 stops32h 50m

Ko Samui

Thu 10/2

8:20 am-9:40 am

2 stops37h 20m

$1,103

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 9/3

12:30 am-9:35 pm

2 stops33h 05m

Ko Samui

Wed 9/17

8:00 am-8:45 pm

2 stops24h 45m

$1,111

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 9/4

12:30 am-9:35 pm

2 stops33h 05m

Ko Samui

Wed 9/17

8:00 am-8:45 pm

2 stops24h 45m

$1,149

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 12/18

8:20 pm-1:05 pm

2 stops27h 45m

$1,359

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 11 results
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The best insider tips for Chicago O'Hare Intl Airport to Ko Samui flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to Ko Samui trip
Airlines
United Airlines

Polaris offers lie-flat seats with noise-reducing headphones and large entertainment screens.


United Polaris Lounge access includes showers and napping areas with daybeds and white noise.

Read more about United Airlinesby Harriet Baskas
Spirit Airlines

Spirit's Big Front Seats offer 11 inches more legroom and larger tray tables.


Spirit's self-service bag drop saves time; print your boarding pass beforehand to avoid fees.

Read more about Spirit Airlinesby Daniel Scheffler
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Daniel Scheffler

Daniel Scheffler

Expert on Spirit Airlines

Daniel Scheffler

Daniel Scheffler

Daniel Scheffler is a travel writer, podcaster, and producer. Born in Africa, bred in Europe and now living in America he has traveled to 140 countries (and all 50 U.S. states). Plus he has stayed at over 2500 hotels across the globe. His original shows Everywhere and Without Maps (available on Spotify) showcase his beliefs, travel is about humanity and sharing that beauty. And thus it reminds you that you shouldn’t believe everything you think.

Read more

Best time to book a flight from O'Hare Intl to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from O'Hare Intl 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 Chicago O'Hare Intl Airport to Ko Samui

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

Find hourly flight availability from O'Hare Intl 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 16, 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to Ko Samui at noon. Doing so could potentially save you 43% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to Ko Samui?

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Ko Samui. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Ko Samui flight should consider departing on Friday evenings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 16, 2025.
Read reviews from past customers who have flown EVA Air from Chicago O'Hare Intl Airport to Ko Samui. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,233 reviews

Overall

8.4

Crew

8.6

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,233 reviews
EVA Air
8.4
Very good
1,233 reviews

Overall

8.4

Crew

8.6

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl 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 Chicago O'Hare Intl?

    Most people fly into Ko Samui (USM) if they book a flight to Ko Samui from Chicago O'Hare Intl. On average, Ko Samui has 0 inbound flights from Chicago O'Hare Intl per day from 1 airline. Ko Samui is conveniently located just 2.1 mi from Ko Samui’s city center.

  • What is the cheapest airline to fly from Chicago O'Hare Intl Airport to Ko Samui round-trip?

    EVA Air, at $1,117, was found to be the cheapest airline from Chicago O'Hare Intl Airport to Ko Samui.. Users have found that EVA Air is 31% cheaper than the other options available to this destination.

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

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

  • How can I find direct flights from O'Hare Intl 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'Hare Intl to Ko Samui.

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

    Yes. Cheapflights offers flight deals from O'Hare Intl 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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Top airline flying from O'Hare Intl to Ko Samui

Discover the top airline that operate flights from O'Hare Intl to Ko Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,117Average$1,531FlexibilityNo cancel feeOn-time74%

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