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Ko Samui

$683+ Cheap flights from Illinois 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.
ORD — USM
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap flight deals from Illinois to Ko Samui

Keep the following information in mind while searching for Illinois to Ko Samui flight deals. Data was last updated junio 12, 2025.

Round-trip from

$1,349
(Trip.com)

One-way from

$683
(Kiwi.com)
From Illinois to Ko Samui
Search Deals
One-way flight from Illinois to Ko Samui
Search Deals

Find flight deals from Illinois to Ko Samui

Cheapest flights from Illinois to Ko Samui
Explore the most affordable flight options available from Illinois to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 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.
dom. 11/3011:55 amORD - USM
2 stops31h 45mTurkish Airlines
sáb. 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.
jue. 11/62:40 pmORD - USM
2 stops40h 10mMultiple Airlines
sáb. 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.
vie. 9/1912:30 amORD - USM
2 stops26h 40mEVA Air
lun. 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.
vie. 7/251:55 pmORD - USM
2 stops33h 45mEtihad Airways
vie. 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.
sáb. 9/204:00 pmORD - USM
1 stop38h 35mCathay Pacific
lun. 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.
sáb. 9/208:34 amORD - USM
3 stops45h 41mSingapore Airlines
lun. 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 Illinois 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 junio 12, 2025.
Use the filters below to find and compare flights from Illinois to Ko Samui that are best for you.

Fly from

Illinois

Fly to

Ko Samui

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

sáb. 7/26

5:45 pm-8:15 am

2 stops26h 30m

Ko Samui

sáb. 8/2

5:50 pm-8:40 am

2 stops50h 50m

$1,349

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

vie. 7/25

1:55 pm-11:40 am

2 stops33h 45m

Ko Samui

vie. 8/1

5:55 pm-8:45 am

2 stops50h 50m

$1,434

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

sáb. 7/5

7:50 pm-8:15 am

2 stops24h 25m

Ko Samui

sáb. 7/12

8:00 am-10:00 pm

2 stops26h 00m

$1,510

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

mié. 7/2

12:30 am-8:30 pm

2 stops32h 00m

Ko Samui

jue. 7/10

8:00 am-9:10 pm

2 stops49h 10m

$1,534

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

mié. 6/25

7:49 pm-7:20 am

3 stops47h 31m

$683

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

jue. 8/14

11:25 am-1:10 pm

2 stops37h 45m

$790

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

mié. 7/23

12:30 am-8:50 pm

2 stops32h 20m

$881

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

jue. 8/14

7:20 pm-11:55 am

2 stops28h 35m

$1,032

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

mar. 6/24

4:00 pm-6:35 pm

1 stop38h 35m

$1,367

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

jue. 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 Illinois to Ko Samui

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

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

Find hourly flight availability from Illinois 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 junio 12, 2025.

When flying from Illinois to Ko Samui, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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 Illinois 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 Illinois?

    Most people fly into Ko Samui (USM) if they book a flight to Ko Samui from Illinois. Ko Samui is conveniently located just 2.1 mi from Ko Samui’s city center.

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

    One-way options have recently been found by users for as low as $775 on EVA Air. Other airlines that offer cheap prices include Turkish Airlines from $852 and Qatar Airways from $1,032 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois 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 Illinois?

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

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Alternative routes for Illinois to Ko Samui

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Illinois to Ko Samui

Discover the top airline that operate flights from Illinois 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,148Average$1,311FlexibilityNo cancel feeOn-time74%

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