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Ko Samui

$648+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — USM
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Find cheap flights from Chicago to Ko Samui with Cheapflights

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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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,150
(FlightHub)

One-way from

$714
(Kiwi.com)
Provider with most accurate pricing for Chicago (CHI)-Ko Samui flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Ko Samui flights.
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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 May 1, 2025.

This oojo deal was found by Cheapflights users on 4/29. 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.
Sat 9/2012:10 pmORD - USM
2 stops32h 05mJapan Airlines
Mon 9/297:10 pmUSM - ORD
2 stops25h 55mJapan Airlines
Deal found 4/29$992
This FlightHub deal was found by Cheapflights users on 4/29. 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 11/1311:30 pmORD - USM
2 stops27h 05mEVA Air
Thu 11/277:55 amUSM - ORD
2 stops24h 40mEVA Air
Deal found 4/29$1,112
This Gurufare deal was found by Cheapflights users on 4/29. 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 4/29$1,520
This Gotogate deal was found by Cheapflights users on 4/30. 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.
Fri 6/137:50 pmORD - USM
2 stops25h 10mTurkish Airlines
Fri 6/2012:10 pmUSM - ORD
2 stops33h 30mTurkish Airlines
Deal found 4/30$1,619
This Gotogate deal was found by Cheapflights users on 4/30. 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.
Tue 6/101:30 amORD - USM
2 stops28h 15mMultiple Airlines
Wed 6/257:00 amUSM - ORD
2 stops45h 00mMultiple Airlines
Deal found 4/30$1,716
This Gurufare deal was found by Cheapflights users on 4/29. 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 9/201:35 pmORD - USM
3 stops40h 40mSingapore Airlines
Mon 9/294:25 pmUSM - ORD
2 stops39h 23mSingapore Airlines
Deal found 4/29$1,839
This Emirates deal was found by Cheapflights users on 4/28. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/118:35 pmORD - USM
2 stops48h 45mEmirates
Wed 6/184:25 pmUSM - ORD
2 stops35h 20mEmirates
Deal found 4/28$2,471
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/135:10 pmORD - USM
3 stops31h 35mKLM
Fri 6/201:30 pmUSM - ORD
2 stops36h 40mKLM
Deal found 4/29$2,629

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 May 1, 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

Fri 6/13

7:50 pm-9:00 am

2 stops25h 10m

Ko Samui

Fri 6/20

12:10 pm-9:40 am

2 stops33h 30m

$1,619

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 6/10

1:30 am-5:45 pm

2 stops28h 15m

Ko Samui

Wed 6/25

7:00 am-4:00 pm

2 stops45h 00m

$1,716

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 6/12

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Fri 6/20

8:00 am-9:00 pm

2 stops25h 00m

$1,999

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 6/10

4:00 pm-7:20 am

2 stops27h 20m

Ko Samui

Tue 6/17

10:55 am-2:25 pm

1 stop39h 30m

$2,008

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 6/11

8:35 pm-9:20 am

2 stops48h 45m

Ko Samui

Wed 6/18

4:25 pm-3:45 pm

2 stops35h 20m

$2,471

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 6/13

5:10 pm-12:45 pm

3 stops31h 35m

Ko Samui

Fri 6/20

1:30 pm-2:10 pm

2 stops36h 40m

$2,629

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 6/13

1:30 am-6:30 pm

2 stops29h 00m

Ko Samui

Sat 6/21

7:10 pm-4:00 pm

3 stops32h 50m

$3,460

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 6/12

8:15 pm-12:45 pm

3 stops28h 30m

Ko Samui

Thu 6/19

4:25 pm-12:10 pm

2 stops31h 45m

$3,879

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 6/14

10:58 am-6:15 pm

3 stops43h 17m

Ko Samui

Sat 6/21

4:25 pm-11:25 pm

3 stops43h 00m

$4,364

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 7/14

1:30 am-6:30 pm

2 stops29h 00m

$648

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 15 results
1
2

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Chicago-Ko Samui flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 May 1, 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 May 1, 2025.
EVA Air
8.4
Very good
1,186 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
EVA Air
8.4
Very good
1,186 reviews
EVA Air
8.4
Very good
1,186 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Japan Airlines
8.3
Very good
1,464 reviews
EVA Air
8.4
Very good
1,186 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Singapore Airlines
8.1
Very good
1,292 reviews
EVA Air
8.4
Very good
1,186 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Emirates
8.0
Very good
3,216 reviews
EVA Air
8.4
Very good
1,186 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Cathay Pacific
7.5
Good
855 reviews
EVA Air
8.4
Very good
1,186 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

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, EVA Air ($1,150), Turkish Airlines ($1,160), and Cathay Pacific ($1,512) 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 Etihad Airways, which is currently one of the cheapest options available, starting at $1,055. Cathay Pacific flights start at $1,242 while deals on Japan Airlines start at $1,278 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,147Average$1,520FlexibilityNo cancel feeOn-time74%

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