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Ko Samui

$1,038+ Cheap flights from Chicago (CHI) 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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — USM
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Find flight deals from Chicago to Ko Samui

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

This FlightHub deal was found by Cheapflights users on 10/15. 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.
Tue 11/411:30 pmORD - USM
2 stops27h 05mEVA Air
Wed 11/269:20 amUSM - ORD
2 stops23h 15mEVA Air
Deal found 10/15$1,038
This FlightHub deal was found by Cheapflights users on 10/15. 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.
Mon 11/311:30 pmORD - USM
2 stops27h 55mEVA Air
Wed 11/2610:00 amUSM - ORD
2 stops22h 35mEVA Air
Deal found 10/15$1,039
This oojo deal was found by Cheapflights users on 10/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2012:30 amORD - USM
2 stops25h 15mEVA Air
Tue 11/410:00 amUSM - ORD
2 stops22h 35mEVA Air
Deal found 10/14$1,061
This Gurufare deal was found by Cheapflights users on 10/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/411:30 pmORD - USM
2 stops27h 05mEVA Air
Mon 11/249:20 amUSM - ORD
2 stops23h 15mEVA Air
Deal found 10/15$1,079
This KAYAK deal was found by Cheapflights users on 10/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/211:55 pmORD - USM
2 stops29h 40mEtihad Airways
Tue 11/48:30 amUSM - ORD
2 stops36h 05mEtihad Airways
Deal found 10/14$1,085
This KAYAK deal was found by Cheapflights users on 10/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/311:30 pmORD - USM
2 stops27h 55mEVA Air
Mon 11/249:20 amUSM - ORD
2 stops23h 15mEVA Air
Deal found 10/15$1,103
This FlightHub deal was found by Cheapflights users on 10/15. 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.
Sat 11/112:30 amORD - USM
2 stops26h 25mEVA Air
Thu 11/279:20 amUSM - ORD
2 stops23h 15mEVA Air
Deal found 10/15$1,134
This FlightHub deal was found by Cheapflights users on 10/15. 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.
Sun 11/211:30 pmORD - USM
2 stops27h 05mEVA Air
Tue 11/258:30 amUSM - ORD
2 stops24h 05mEVA Air
Deal found 10/15$1,137
This KAYAK deal was found by Cheapflights users on 10/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/112:30 amORD - USM
2 stops27h 55mEVA Air
Mon 11/247:55 amUSM - ORD
2 stops24h 40mEVA Air
Deal found 10/15$1,143
This EVA Air deal was found by Cheapflights users on 10/13. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1812:30 amORD - USM
2 stops28h 05mEVA Air
Thu 10/238:45 amUSM - ORD
2 stops24h 00mEVA Air
Deal found 10/13$1,278
This KAYAK deal was found by Cheapflights users on 10/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/112:30 amORD - USM
2 stops27h 55mEVA Air
Fri 11/2810:00 amUSM - ORD
2 stops22h 35mEVA Air
Deal found 10/15$1,318
This oojo deal was found by Cheapflights users on 10/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/711:50 amORD - USM
2 stops33h 50mMultiple Airlines
Fri 12/268:40 pmUSM - ORD
2 stops34h 45mMultiple Airlines
Deal found 10/15$1,344

Cheap flight deals from Chicago to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,038
(FlightHub)
Provider with most accurate pricing for Chicago (CHI)-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Ko Samui flights.
Search Deals
From Chicago (CHI) to Ko Samui
Search Deals

Cheapflights Fare Finder

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

Fly from

Chicago

Fly to

Ko Samui

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 11/4

11:30 pm-3:35 pm

2 stops27h 05m

Ko Samui

Wed 11/26

9:20 am-7:35 pm

2 stops23h 15m

$1,038

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 11/4

11:30 pm-3:35 pm

2 stops27h 05m

Ko Samui

Tue 11/25

10:00 am-7:35 pm

2 stops22h 35m

$1,038

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 10/20

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Tue 11/4

10:00 am-7:35 pm

2 stops22h 35m

$1,061

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 11/4

11:30 pm-3:35 pm

2 stops27h 05m

Ko Samui

Mon 11/24

9:20 am-7:35 pm

2 stops23h 15m

$1,079

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 11/3

11:30 pm-4:25 pm

2 stops27h 55m

Ko Samui

Mon 11/24

9:20 am-7:35 pm

2 stops23h 15m

$1,103

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 11/1

12:30 am-2:55 pm

2 stops26h 25m

Ko Samui

Tue 11/25

8:30 am-7:35 pm

2 stops24h 05m

$1,134

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 11/1

12:30 am-2:55 pm

2 stops26h 25m

Ko Samui

Thu 11/27

9:20 am-7:35 pm

2 stops23h 15m

$1,134

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 11/1

12:30 am-2:55 pm

2 stops26h 25m

Ko Samui

Wed 11/26

9:20 am-7:35 pm

2 stops23h 15m

$1,134

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 11/28

11:30 pm-3:40 pm

2 stops27h 10m

Ko Samui

Fri 12/5

8:30 am-7:35 pm

2 stops24h 05m

$1,137

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 11/2

11:30 pm-5:00 pm

2 stops28h 30m

Ko Samui

Mon 11/24

10:00 am-7:35 pm

2 stops22h 35m

$1,143

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Compare providers for flights from Chicago 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 Chicago to Ko Samui in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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-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-Ko Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-Ko Samui flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-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-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 Chicago to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Chicago 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 to Ko Samui

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

Find hourly flight availability from Chicago 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 16, 2025.

One of the essential ways to save on airfare from Chicago to Ko Samui is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 30% on airfare.

What is the cheapest day to fly from Chicago to Ko Samui?

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

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

Related info for your journey

Find useful and relevant information for your journey from Chicago 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?

    Ko Samui (USM), located 2.1 mi from the city center, is the airport you fly into when you book flights from Chicago to Ko Samui. 1 airline have flights to Ko Samui from Chicago on a regular basis. Booking flights from Chicago to Ko Samui should not be difficult; the airport handles an average of 0 inbound flights from Chicago per day.

  • How long is the flight from Chicago to Ko Samui?

    EVA Air can get you from Chicago to Ko Samui in just under 27h 05m. Your travel time can differ by up to . Chicago and Ko Samui are separated by a distance of 8835 mi.

  • Can I find deals for flights from Chicago to Ko Samui that include hotel bookings?

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

  • How can I find direct flights from Chicago to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Ko Samui.

  • Can I find deals for business class flights from Chicago to Ko Samui?

    Yes. Cheapflights offers flight deals from Chicago 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

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Top airline flying from Chicago to Ko Samui

Discover the top airline that operate flights from Chicago 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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,112Average$1,258FlexibilityNo cancel feeOn-time74%

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