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Ko Samui

$574+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — USM
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,156
(FlightHub)

One-way from

$574
(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 Illinois to Ko Samui
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One-way flight from Illinois to Ko Samui
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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 March 31, 2025.

This FlightHub deal was found by Cheapflights users on 3/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3012:30 amORD - USM
2 stops33h 05mMultiple Airlines
Tue 10/79:15 amUSM - ORD
2 stops23h 30mMultiple Airlines
Deal found 3/30$1,111
This oojo deal was found by Cheapflights users on 3/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1912:30 amORD - USM
2 stops25h 15mEVA Air
Mon 9/298:45 amUSM - ORD
2 stops24h 00mEVA Air
Deal found 3/30$1,147
This Ovago deal was found by Cheapflights users on 3/31. 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.
Sat 9/2012:10 pmORD - USM
2 stops41h 35mJapan Airlines
Mon 9/297:10 pmUSM - ORD
2 stops25h 55mJapan Airlines
Deal found 3/31$1,248
This Ovago deal was found by Cheapflights users on 3/30. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/201:55 pmORD - USM
2 stops32h 50mEtihad Airways
Mon 9/298:50 pmUSM - ORD
2 stops47h 55mEtihad Airways
Deal found 3/30$1,380
This Justfly.com deal was found by Cheapflights users on 3/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:50 pmORD - USM
2 stops24h 25mTurkish Airlines
Tue 10/79:00 pmUSM - ORD
2 stops32h 55mTurkish Airlines
Deal found 3/30$1,445
This lol.travel deal was found by Cheapflights users on 3/30. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/244:00 pmORD - USM
1 stop38h 35mCathay Pacific
Thu 5/810:55 amUSM - ORD
1 stop39h 30mCathay Pacific
Deal found 3/30$1,466
This KAYAK deal was found by Cheapflights users on 3/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/208:42 pmORD - USM
2 stops36h 28mSingapore Airlines
Mon 9/294:25 pmUSM - ORD
3 stops40h 29mSingapore Airlines
Deal found 3/30$1,872

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 March 31, 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

Fri 9/19

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Mon 9/29

8:45 am-8:45 pm

2 stops24h 00m

$1,147

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 5/4

5:45 pm-10:10 am

2 stops28h 25m

Ko Samui

Sun 5/11

8:45 am-8:40 am

2 stops59h 55m

$1,213

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 9/20

12:10 pm-5:45 pm

2 stops41h 35m

Ko Samui

Mon 9/29

7:10 pm-9:05 am

2 stops25h 55m

$1,248

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 9/20

1:55 pm-10:45 am

2 stops32h 50m

Ko Samui

Mon 9/29

8:50 pm-8:45 am

2 stops47h 55m

$1,380

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 4/24

4:00 pm-6:35 pm

1 stop38h 35m

Ko Samui

Thu 5/8

10:55 am-2:25 pm

1 stop39h 30m

$1,466

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 5/10

11:25 am-8:15 am

2 stops32h 50m

Ko Samui

Sat 5/31

5:50 pm-5:55 pm

2 stops36h 05m

$1,499

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 9/20

8:42 pm-9:10 pm

2 stops36h 28m

Ko Samui

Mon 9/29

4:25 pm-8:54 pm

3 stops40h 29m

$1,872

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 5/14

12:00 pm-7:20 am

2 stops31h 20m

$574

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 4/14

12:30 am-7:35 am

2 stops43h 05m

$731

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 5/14

4:00 pm-6:35 pm

1 stop38h 35m

$1,285

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 11 results
1
2

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 March 31, 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 March 31, 2025.
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very good
1,170 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Japan Airlines
8.3
Very good
1,440 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Singapore Airlines
8.1
Very good
1,286 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Emirates
8.0
Very good
3,192 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
KLM
7.8
Good
1,321 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

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 $731 on EVA Air. Other airlines that offer cheap prices include Cathay Pacific from $1,285 and SWISS from $2,789 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,147Average$1,311FlexibilityNo cancel feeOn-time74%
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