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$1,229+ Cheap flights from Ko Samui (USM) to Illinois

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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
USM — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Ko Samui to Illinois

Keep the following information in mind while searching for Ko Samui to Illinois flight deals. Data was last updated October 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$1,229
(FlightHub)
Provider with most accurate pricing for Ko Samui-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Ko Samui-Chicago (CHI) flights.
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From Ko Samui to Illinois
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Find flight deals from Ko Samui to Illinois

Cheapest flights from Ko Samui to Illinois
Explore the most affordable flight options available from Ko Samui to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/139:35 amUSM - ORD
2 stops23h 00mEVA Air
Sat 11/1511:30 pmORD - USM
2 stops26h 25mEVA Air
Deal found 10/28$1,229
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:40 amUSM - ORD
1 stop38h 15mCathay Pacific
Sun 11/162:35 pmORD - USM
1 stop40h 00mCathay Pacific
Deal found 10/28$1,285
This EVA Air deal was found by Cheapflights users on 10/28. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:55 amUSM - ORD
2 stops24h 40mEVA Air
Mon 11/1711:30 pmORD - USM
2 stops27h 55mEVA Air
Deal found 10/28$1,288
This EVA Air deal was found by Cheapflights users on 10/28. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:30 amUSM - ORD
2 stops24h 05mEVA Air
Thu 11/1311:30 pmORD - USM
2 stops43h 40mEVA Air
Deal found 10/28$1,299
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:40 amUSM - ORD
1 stop38h 15mCathay Pacific
Mon 11/172:35 pmORD - USM
1 stop40h 00mCathay Pacific
Deal found 10/28$1,350
This EVA Air deal was found by Cheapflights users on 10/28. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/149:35 amUSM - ORD
2 stops23h 00mEVA Air
Tue 11/1811:30 pmORD - USM
2 stops27h 55mEVA Air
Deal found 10/28$1,376
This EVA Air deal was found by Cheapflights users on 10/28. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:35 amUSM - ORD
2 stops23h 00mEVA Air
Sun 11/1611:30 pmORD - USM
2 stops26h 25mEVA Air
Deal found 10/28$1,411
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:35 pmUSM - ORD
2 stops27h 30mTurkish Airlines
Fri 11/1411:50 amORD - USM
2 stops32h 15mTurkish Airlines
Deal found 10/28$1,439
This Cathay Pacific deal was found by Cheapflights users on 10/28. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:40 amUSM - ORD
1 stop38h 15mCathay Pacific
Fri 11/142:35 pmORD - USM
1 stop40h 00mCathay Pacific
Deal found 10/28$1,665
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/139:35 amUSM - ORD
2 stops23h 00mEVA Air
Fri 11/1411:30 pmORD - USM
2 stops27h 05mEVA Air
Deal found 10/28$1,700
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:40 amUSM - ORD
1 stop38h 15mCathay Pacific
Sat 11/152:35 pmORD - USM
1 stop40h 00mCathay Pacific
Deal found 10/28$1,705

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ko Samui to Illinois 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 October 30, 2025.
Use the filters below to find and compare flights from Ko Samui to Illinois that are best for you.

Fly from

Ko Samui

Fly to

Illinois

Route

Depart

Return

Price

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Thu 11/13

9:35 am-7:35 pm

2 stops23h 00m

Chicago O'Hare Intl

Sun 11/16

11:30 pm-2:55 pm

2 stops26h 25m

$1,229

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Thu 11/13

9:35 am-7:35 pm

2 stops23h 00m

Chicago O'Hare Intl

Sat 11/15

11:30 pm-2:55 pm

2 stops26h 25m

$1,229

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Thu 11/13

11:40 am-12:55 pm

1 stop38h 15m

Chicago O'Hare Intl

Sun 11/16

2:35 pm-7:35 pm

1 stop40h 00m

$1,285

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Sat 11/15

8:20 pm-7:35 pm

2 stops36h 15m

Chicago O'Hare Intl

Sun 11/16

11:30 pm-3:35 pm

2 stops27h 05m

$1,288

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Fri 11/14

8:30 am-7:35 pm

2 stops24h 05m

Chicago O'Hare Intl

Mon 11/17

11:30 pm-5:00 pm

2 stops28h 30m

$1,288

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Sun 11/16

8:20 pm-7:35 pm

2 stops36h 15m

Chicago O'Hare Intl

Mon 11/17

11:30 pm-5:00 pm

2 stops28h 30m

$1,288

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Wed 11/12

8:30 am-7:35 pm

2 stops24h 05m

Chicago O'Hare Intl

Sat 11/15

11:30 pm-6:05 pm

2 stops29h 35m

$1,288

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Sat 11/15

9:10 pm-7:35 pm

2 stops35h 25m

Chicago O'Hare Intl

Mon 11/17

11:30 pm-2:55 pm

2 stops26h 25m

$1,288

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Wed 11/12

8:45 pm-7:35 pm

2 stops35h 50m

Chicago O'Hare Intl

Sun 11/16

11:30 pm-3:35 pm

2 stops27h 05m

$1,288

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Wed 11/12

8:30 am-7:35 pm

2 stops24h 05m

Chicago O'Hare Intl

Thu 11/13

11:30 pm-8:10 am

2 stops43h 40m

$1,299

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 12 results
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Best time to book a flight from Ko Samui to Illinois

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

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

Find hourly flight availability from Ko Samui to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

When flying from Ko Samui to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 38% versus a flight in the afternoon.

What is the cheapest day to fly from Ko Samui to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Ko Samui to Illinois. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Ko Samui to Illinois flight should consider departing on Tuesday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Ko Samui to Illinois. 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 from for flights from Ko Samui to Illinois?

    Located just 2.1 mi from the city center, Ko Samui (USM) is the airport most travelers will use when flying to Illinois from Ko Samui.

  • How long is the flight from Ko Samui to Illinois?

    For as low as $1,229, EVA Air can have you in Illinois from Ko Samui in 23h. The distance from Ko Samui to Illinois is about 8835 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ko Samui to Illinois 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

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