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Koh Samui

$1,091+ Cheap flights from Illinois to Koh 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — USM
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from Illinois to Koh Samui

Keep the following information in mind while searching for Illinois to Koh Samui flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,276
(oojo)
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 Illinois to Ko Samui
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Find flight deals from Illinois to Koh Samui

Cheapest flights from Illinois to Koh Samui
Explore the most affordable flight options available from Illinois to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This FlightHub deal was found by Cheapflights users on 2/19. 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 9/2012:10 pmORD - USM
2 stops33h 10mJapan Airlines
Mon 9/297:10 pmUSM - ORD
2 stops32h 35mJapan Airlines
Deal found 2/19$1,091
This Justfly.com deal was found by Cheapflights users on 2/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1912:30 amORD - USM
2 stops26h 15mEVA Air
Mon 9/298:45 amUSM - ORD
2 stops24h 00mEVA Air
Deal found 2/19$1,149
This Trip.com deal was found by Cheapflights users on 2/20. 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 4/34:00 pmORD - USM
2 stops30h 10mMultiple Airlines
Thu 4/108:00 amUSM - ORD
2 stops42h 25mMultiple Airlines
Deal found 2/20$1,304
This Kissandfly.com deal was found by Cheapflights users on 2/18. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/510:35 amORD - USM
2 stops46h 35mBangkok Airways
Sat 4/121:30 pmUSM - ORD
2 stops28h 14mBangkok Airways
Deal found 2/18$1,363
This Ovago deal was found by Cheapflights users on 2/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/81:10 pmORD - USM
2 stops32h 25mEtihad Airways
Mon 12/229:25 pmUSM - ORD
2 stops47h 50mEtihad Airways
Deal found 2/20$1,465
This Gotogate deal was found by Cheapflights users on 2/19. 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.
Sat 4/54:00 pmORD - USM
1 stop38h 35mCathay Pacific
Sat 4/1210:55 amUSM - ORD
1 stop39h 30mCathay Pacific
Deal found 2/19$1,528
This Gotogate deal was found by Cheapflights users on 2/20. 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.
Sun 4/67:20 pmORD - USM
2 stops35h 15mQatar Airways
Sun 4/133:25 pmUSM - ORD
2 stops35h 40mQatar Airways
Deal found 2/20$1,666
This Gurufare deal was found by Cheapflights users on 2/19. 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 9/209:50 amORD - USM
3 stops44h 25mSingapore Airlines
Mon 9/294:25 pmUSM - ORD
2 stops37h 25mSingapore Airlines
Deal found 2/19$2,087
This Booking.com deal was found by Cheapflights users on 2/20. 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.
Sun 6/157:50 pmORD - USM
2 stops31h 55mTurkish Airlines
Thu 7/311:30 pmUSM - ORD
2 stops40h 25mTurkish Airlines
Deal found 2/20$2,091
This SWISS deal was found by Cheapflights users on 2/20. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/66:35 pmORD - USM
2 stops38h 35mSWISS
Sun 4/139:15 amUSM - ORD
2 stops39h 30mSWISS
Deal found 2/20$4,200
This Austrian Airlines deal was found by Cheapflights users on 2/20. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/64:20 pmORD - USM
2 stops37h 25mAustrian Airlines
Sun 4/137:15 pmUSM - ORD
2 stops30h 05mAustrian Airlines
Deal found 2/20$4,207

Find flights from Illinois to Koh Samui within your budget

Customize your flight search to find flights from Illinois to Koh 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 February 20, 2025.

Fly from

Illinois

Fly to

Koh Samui

Route

Depart

Return

Price

ChicagoKoh Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 4/24

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Sun 5/4

7:30 pm-9:00 pm

2 stops37h 30m

$1,276

ChicagoKoh Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 4/3

4:00 pm-10:10 am

2 stops30h 10m

Ko Samui

Thu 4/10

8:00 am-2:25 pm

2 stops42h 25m

$1,304

ChicagoKoh Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 4/5

10:35 am-9:10 pm

2 stops46h 35m

Ko Samui

Sat 4/12

1:30 pm-5:44 am

2 stops28h 14m

$1,363

ChicagoKoh Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 4/5

4:00 pm-6:35 pm

1 stop38h 35m

Ko Samui

Sat 4/12

10:55 am-2:25 pm

1 stop39h 30m

$1,528

ChicagoKoh Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 4/6

7:20 pm-6:35 pm

2 stops35h 15m

Ko Samui

Sun 4/13

3:25 pm-3:05 pm

2 stops35h 40m

$1,666

ChicagoKoh Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 4/6

6:35 pm-9:10 pm

2 stops38h 35m

Ko Samui

Sun 4/13

9:15 am-12:45 pm

2 stops39h 30m

$4,200

ChicagoKoh Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 4/6

4:20 pm-5:45 pm

2 stops37h 25m

Ko Samui

Sun 4/13

7:15 pm-1:20 pm

2 stops30h 05m

$4,207

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Best time to book a flight from Illinois to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh 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.

Travel insights for flights from Illinois to Koh Samui

Get recent, data-driven insights about flights from Illinois to Koh Samui including ideal travel times, pricing trends, and more.

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

Find hourly flight availability from Illinois to Koh Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

When flying from Illinois to Koh 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 Koh Samui by month

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

In terms of precipitation, rainfall in Koh 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 Koh Samui when rainfall is around 2.3 in.

Temperature in Koh Samui by month

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

If weather is an important factor for your trip to Koh 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 Koh Samui

Get insights into the airlines that provide service to Koh 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 Koh Samui. Reviews last updated February 20, 2025.
EVA Air
8.4
Very good
1,200 reviews

Food

8.0

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

EVA Air
8.4
Very good
1,200 reviews
EVA Air
8.4
Very good
1,200 reviews

Food

8.0

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Bangkok Airways
8.0
Very good
115 reviews
EVA Air
8.4
Very good
1,200 reviews

Food

8.0

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Cathay Pacific
7.5
Good
820 reviews
EVA Air
8.4
Very good
1,200 reviews

Food

8.0

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

SWISS
7.5
Good
1,568 reviews
EVA Air
8.4
Very good
1,200 reviews

Food

8.0

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Qatar Airways
7.4
Good
3,613 reviews
EVA Air
8.4
Very good
1,200 reviews

Food

8.0

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Koh 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 Koh Samui from Illinois?

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Koh 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 Pha Ngan
Ko Tao

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Alternative routes for Illinois to Koh 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 Koh Samui

Discover the top airline that operate flights from Illinois to Koh 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,147Average$1,275FlexibilityNo cancel feeOn-time74%
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