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Ko Samui

$879+ Cheap flights from O'Hare Intl (ORD) 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — USM
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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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 November 26, 2025.

This Gotogate deal was found by Cheapflights users on 11/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2610:20 amORD - USM
2 stops32h 25mMultiple Airlines
Mon 12/87:35 pmUSM - ORD
2 stops32h 06mMultiple Airlines
Deal found 11/26$1,251
This FlightHub deal was found by Cheapflights users on 11/25. 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.
Sun 12/711:30 pmORD - USM
2 stops27h 55mEVA Air
Fri 12/267:55 amUSM - ORD
2 stops24h 40mEVA Air
Deal found 11/25$1,440
This oojo deal was found by Cheapflights users on 11/26. 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.
Wed 11/262:35 pmORD - USM
1 stop40h 00mCathay Pacific
Mon 12/811:40 amUSM - ORD
1 stop38h 15mCathay Pacific
Deal found 11/26$1,720
This oojo deal was found by Cheapflights users on 11/25. 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 12/72:35 pmORD - USM
1 stop40h 00mCathay Pacific
Fri 12/267:55 amUSM - ORD
2 stops42h 00mCathay Pacific
Deal found 11/25$2,200
This FlightHub deal was found by Cheapflights users on 11/24. 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.
Wed 12/1711:30 pmORD - USM
2 stops29h 45mMultiple Airlines
Mon 1/121:25 pmUSM - ORD
2 stops43h 10mMultiple Airlines
Deal found 11/24$2,636

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 November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,051
(FlightHub)

One-way from

$879
(EVA Air)

Popular in

December

Cheapest in

October

Average price

$1,176
Provider with most accurate pricing for Chicago O'Hare Intl-Ko Samui flight deals.
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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Ko Samui flights.
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From Chicago O'Hare Intl to Ko Samui
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One-way flight from Chicago O'Hare Intl to Ko Samui
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Highest demand for flights based on searches. 9% potential increase in price ($161 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($57 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 November 26, 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

Sat 4/25

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Thu 5/7

8:00 am-9:00 pm

2 stops25h 00m

$1,070

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 3/4

11:30 pm-2:55 pm

2 stops26h 25m

Ko Samui

Mon 3/9

10:00 am-8:35 pm

2 stops22h 35m

$1,089

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/15

12:50 pm-8:05 am

2 stops31h 15m

Ko Samui

Thu 3/19

8:15 am-11:05 am

2 stops38h 50m

$1,102

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 3/14

12:30 am-3:35 pm

2 stops27h 05m

Ko Samui

Thu 3/19

7:15 am-8:35 pm

2 stops25h 20m

$1,142

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 3/10

12:50 pm-6:25 pm

2 stops41h 35m

Ko Samui

Tue 4/7

8:20 am-9:40 am

2 stops37h 20m

$1,147

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 2/16

11:30 pm-3:40 pm

2 stops27h 10m

Ko Samui

Wed 3/11

9:00 am-8:35 pm

2 stops23h 35m

$1,154

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 2/1

11:30 pm-3:35 pm

2 stops27h 05m

Ko Samui

Sun 2/15

8:30 pm-7:35 pm

2 stops36h 05m

$1,184

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 2/14

11:30 pm-3:40 pm

2 stops27h 10m

Ko Samui

Sun 3/15

9:10 pm-8:35 pm

2 stops35h 25m

$1,202

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 12/31

11:30 pm-8:25 pm

2 stops31h 55m

$879

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 12/31

6:45 am-9:05 pm

3 stops49h 20m

$2,111

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 14 results
1
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Compare providers for flights from O'Hare Intl to Ko Samui

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Ko Samui in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-Ko Samui flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chicago O'Hare Intl Airport-Ko Samui flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Ko Samui flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Ko Samui flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 November 26, 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 42% 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.

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

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 November 26, 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
1,283 reviews

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Walter,Nov 2025

LAX - TPE

Everything went well. The crew was very friendly and efficient and they made a long flight enjoyable.
EVA Air
8.4
Very good
1,283 reviews
EVA Air
8.4
Very good
1,283 reviews

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Walter,Nov 2025

LAX - TPE

Everything went well. The crew was very friendly and efficient and they made a long flight enjoyable.

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.

  • How long is the flight from Chicago O'Hare Intl Airport to Ko Samui?

    For as low as $1,070, EVA Air can have you in Ko Samui from Chicago O'Hare Intl Airport in 25h 15m. The distance between Chicago O'Hare Intl Airport and Ko Samui is about 8835 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    EVA Air, at $1,112, was found to be the cheapest airline from Chicago O'Hare Intl Airport to Ko Samui.. Users have found that EVA Air is 27% 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,112Average$1,258FlexibilityNo cancel feeOn-time74%

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