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Ko Samui

$632+ 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 3/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — USM
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap 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 January 26, 2026.

This Gurufare deal was found by Cheapflights users on 1/25. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:05 am
ORD
-
USM
2 stops28h 40m
Multiple Airlines
Tue 9/87:10 pm
USM
-
ORD
2 stops25h 55m
Multiple Airlines
Deal found 1/25$935
This FlightHub deal was found by Cheapflights users on 1/24. 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.
Tue 11/2411:30 pm
ORD
-
USM
2 stops27h 55m
EVA Air
Tue 12/87:00 am
USM
-
ORD
2 stops25h 35m
EVA Air
Deal found 1/24$985
This FlightHub deal was found by Cheapflights users on 1/25. 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.
Wed 3/1112:30 am
ORD
-
USM
2 stops43h 15m
EVA Air
Wed 3/188:30 am
USM
-
ORD
2 stops24h 05m
EVA Air
Deal found 1/25$989
This IEagle deal was found by Cheapflights users on 1/25. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1012:30 am
ORD
-
USM
2 stops27h 10m
EVA Air
Wed 3/189:00 am
USM
-
ORD
2 stops23h 35m
EVA Air
Deal found 1/25$1,022
This FlightHub deal was found by Cheapflights users on 1/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/912:30 am
ORD
-
USM
2 stops27h 10m
EVA Air
Tue 4/79:00 pm
USM
-
ORD
2 stops36h 00m
EVA Air
Deal found 1/26$1,041
This FlightHub deal was found by Cheapflights users on 1/25. 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.
Mon 3/211:30 pm
ORD
-
USM
2 stops29h 10m
EVA Air
Thu 3/57:15 am
USM
-
ORD
2 stops25h 20m
EVA Air
Deal found 1/25$1,042
This EVA Air deal was found by Cheapflights users on 1/25. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:30 am
ORD
-
USM
2 stops26h 25m
EVA Air
Sun 11/19:10 pm
USM
-
ORD
2 stops35h 25m
EVA Air
Deal found 1/25$1,054
This oojo deal was found by Cheapflights users on 1/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/89:20 pm
ORD
-
USM
2 stops33h 05m
Multiple Airlines
Wed 3/186:15 pm
USM
-
ORD
2 stops28h 50m
Multiple Airlines
Deal found 1/24$1,074
This oojo deal was found by Cheapflights users on 1/25. 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 11/19:20 pm
ORD
-
USM
2 stops24h 20m
Multiple Airlines
Sat 11/77:35 pm
USM
-
ORD
2 stops27h 30m
Multiple Airlines
Deal found 1/25$1,075
This Trip.com deal was found by Cheapflights users on 1/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/278:20 pm
ORD
-
USM
2 stops56h 55m
Multiple Airlines
Thu 3/124:25 pm
USM
-
ORD
2 stops39h 00m
Multiple Airlines
Deal found 1/26$1,108
This Trip.com deal was found by Cheapflights users on 1/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/32:00 pm
ORD
-
USM
2 stops43h 10m
Multiple Airlines
Fri 4/108:55 am
USM
-
ORD
2 stops59h 40m
Multiple Airlines
Deal found 1/24$1,345

Find 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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$989
(FlightHub)

One-way from

$632
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,855
Provider with most accurate pricing for Chicago O'Hare Intl-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Ko Samui flights.
Search Deals
From Chicago O'Hare Intl to Ko Samui
Search Deals
One-way flight from Chicago O'Hare Intl to Ko Samui
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($202 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 26, 2026.
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 3/11

12:30 am-7:45 am

2 stops43h 15m

Ko Samui

Wed 3/18

8:30 am-8:35 pm

2 stops24h 05m

$989

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/9

12:30 am-3:40 pm

2 stops27h 10m

Ko Samui

Tue 4/7

9:00 pm-9:00 pm

2 stops36h 00m

$1,041

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

9:20 pm-6:25 pm

2 stops33h 05m

Ko Samui

Wed 3/18

6:15 pm-11:05 am

2 stops28h 50m

$1,074

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 2/27

8:20 pm-6:15 pm

2 stops56h 55m

Ko Samui

Thu 3/12

4:25 pm-7:25 pm

2 stops39h 00m

$1,108

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 2/10

8:20 pm-9:05 pm

2 stops35h 45m

Ko Samui

Fri 2/20

4:25 pm-10:05 am

2 stops54h 40m

$1,307

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 4/3

2:00 pm-9:10 pm

2 stops43h 10m

Ko Samui

Fri 4/10

8:55 am-8:35 am

2 stops59h 40m

$1,345

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 3/28

12:30 am-3:45 pm

2 stops27h 15m

Ko Samui

Sat 4/4

8:35 pm-9:00 pm

2 stops60h 25m

$1,385

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 3/12

3:35 pm-7:35 pm

1 stop40h 00m

Ko Samui

Wed 3/18

2:30 pm-1:55 pm

2 stops35h 25m

$1,569

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 3/12

3:35 pm-7:35 pm

1 stop40h 00m

Ko Samui

Wed 3/18

11:40 am-1:55 pm

1 stop38h 15m

$1,733

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 3/10

3:35 pm-7:35 pm

1 stop40h 00m

Ko Samui

Tue 4/7

2:35 pm-1:55 pm

2 stops35h 20m

$1,775

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

Showing 1-10 of 11 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 January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-Ko Samui flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 January 26, 2026.

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to Ko Samui trip
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on United Airlines

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 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 January 26, 2026.
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
1,333 reviews

Food

8.1

Comfort

8.3

Crew

8.6

Boarding

8.4

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

SFO - TPE

It's alright. I wish I was assigned a seat on the isle side. I was not able to pick a seat during booking. So, I was seated in between two guys. For a 14 hours flight, it was barely bearable.
EVA Air
8.4
Very good
1,333 reviews
EVA Air
8.4
Very good
1,333 reviews

Food

8.1

Comfort

8.3

Crew

8.6

Boarding

8.4

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

SFO - TPE

It's alright. I wish I was assigned a seat on the isle side. I was not able to pick a seat during booking. So, I was seated in between two guys. For a 14 hours flight, it was barely bearable.

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 $989, EVA Air can have you in Ko Samui from Chicago O'Hare Intl Airport in 43h 15m. The distance between Chicago O'Hare Intl Airport and Ko Samui is about 8835 mi.

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

    EVA Air, at $1,098, was found to be the cheapest airline from Chicago O'Hare Intl Airport to Ko Samui.. Users have found that EVA Air is 26% 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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,098Average$1,218FlexibilityNo cancel feeOn-time74%

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