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Ko Samui

$683+ Cheap flights from Chicago (CHI) 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 6/25. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — USM
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$1,349
(Trip.com)

One-way from

$683
(Kiwi.com)
From Chicago (CHI) to Ko Samui
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One-way flight from Chicago (CHI) to Ko Samui
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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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/11. 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 11/3011:55 amORD - USM
2 stops31h 45mTurkish Airlines
Sat 12/67:00 amUSM - ORD
2 stops40h 10mTurkish Airlines
Deal found 6/11$1,044
This Trip.com deal was found by Cheapflights users on 6/12. 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.
Thu 11/62:40 pmORD - USM
2 stops40h 10mMultiple Airlines
Sat 11/227:55 amUSM - ORD
2 stops42h 05mMultiple Airlines
Deal found 6/12$1,112
This FlightHub deal was found by Cheapflights users on 6/11. 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.
Fri 9/1912:30 amORD - USM
2 stops26h 40mEVA Air
Mon 9/297:00 amUSM - ORD
2 stops25h 45mEVA Air
Deal found 6/11$1,153
This SmartFares deal was found by Cheapflights users on 6/10. 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.
Fri 7/251:55 pmORD - USM
2 stops33h 45mEtihad Airways
Fri 8/15:55 pmUSM - ORD
2 stops50h 50mEtihad Airways
Deal found 6/10$1,434
This Gurufare deal was found by Cheapflights users on 6/11. 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.
Sat 9/204:00 pmORD - USM
1 stop38h 35mCathay Pacific
Mon 9/2910:55 amUSM - ORD
1 stop39h 30mCathay Pacific
Deal found 6/11$1,527
This Gurufare deal was found by Cheapflights users on 6/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/208:34 amORD - USM
3 stops45h 41mSingapore Airlines
Mon 9/294:25 pmUSM - ORD
2 stops39h 23mSingapore Airlines
Deal found 6/10$1,924

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 June 12, 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

Sat 7/26

5:45 pm-8:15 am

2 stops26h 30m

Ko Samui

Sat 8/2

5:50 pm-8:40 am

2 stops50h 50m

$1,349

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 7/25

1:55 pm-11:40 am

2 stops33h 45m

Ko Samui

Fri 8/1

5:55 pm-8:45 am

2 stops50h 50m

$1,434

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 7/5

7:50 pm-8:15 am

2 stops24h 25m

Ko Samui

Sat 7/12

8:00 am-10:00 pm

2 stops26h 00m

$1,510

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 7/2

12:30 am-8:30 pm

2 stops32h 00m

Ko Samui

Thu 7/10

8:00 am-9:10 pm

2 stops49h 10m

$1,534

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 6/25

7:49 pm-7:20 am

3 stops47h 31m

$683

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 8/14

11:25 am-1:10 pm

2 stops37h 45m

$790

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 7/23

12:30 am-8:50 pm

2 stops32h 20m

$881

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 8/14

7:20 pm-11:55 am

2 stops28h 35m

$1,032

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 6/24

4:00 pm-6:35 pm

1 stop38h 35m

$1,367

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 8/14

11:35 am-9:15 pm

3 stops45h 40m

$1,861

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 12 results
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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 June 12, 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 evening could potentially save you up to 64% 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 Thursday evenings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ko Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Ko Samui when rainfall is around 2.3 in.

Temperature in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

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 June 12, 2025.
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

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
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

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
Singapore Airlines
8.1
Very good
1,302 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

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
Austrian Airlines
7.6
Good
802 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

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
Cathay Pacific
7.6
Good
892 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

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
SWISS
7.5
Good
1,623 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

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 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.

  • What are the cheapest airlines flying from Chicago to Ko Samui round-trip?

    According to our current data, Etihad Airways ($1,434), Turkish Airlines ($1,510), and EVA Air ($1,534) offers the cheapest pricing from Chicago to Ko Samui.

  • What are the cheapest airlines to fly from Chicago to Ko Samui one-way?

    To fly one-way, consider booking your trip with EVA Air, which is currently one of the cheapest options available, starting at $775. Turkish Airlines flights start at $852 while deals on Qatar Airways start at $1,032 one-way.

  • 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 Chicago?

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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,148Average$1,311FlexibilityNo cancel feeOn-time74%

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