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$1,534+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
USM — ORD
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
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 septiembre 11, 2025.

Round-trip from

$1,591
(EVA Air)
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 septiembre 11, 2025.

This EaseMyTrip deal was found by Cheapflights users on 9/10. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1210:55 amUSM - ORD
2 stops21h 50mMultiple Airlines
mar. 10/1412:30 amORD - USM
2 stops25h 15mMultiple Airlines
Deal found 9/10$1,534
This EVA Air deal was found by Cheapflights users on 9/10. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/109:15 amUSM - ORD
2 stops23h 30mEVA Air
lun. 10/1312:30 amORD - USM
2 stops27h 15mEVA Air
Deal found 9/10$1,591
This EaseMyTrip deal was found by Cheapflights users on 9/10. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1210:55 amUSM - ORD
1 stop39h 30mCathay Pacific
mié. 10/154:00 pmORD - USM
1 stop38h 35mCathay Pacific
Deal found 9/10$1,678
This SWISS deal was found by Cheapflights users on 9/9. 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.
vie. 10/109:15 amUSM - ORD
2 stops42h 40mSWISS
mar. 10/147:05 pmORD - USM
2 stops29h 40mSWISS
Deal found 9/9$1,876
This EaseMyTrip deal was found by Cheapflights users on 9/10. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/125:55 pmUSM - ORD
2 stops32h 55mQatar Airways
mié. 10/151:35 pmORD - USM
3 stops39h 30mQatar Airways
Deal found 9/10$1,912
This Qatar Airways deal was found by Cheapflights users on 9/10. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/101:30 pmUSM - ORD
2 stops37h 20mQatar Airways
mar. 10/147:40 pmORD - USM
2 stops26h 50mQatar Airways
Deal found 9/10$1,950

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 septiembre 11, 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

vie. 10/10

9:15 am-8:45 pm

2 stops23h 30m

Chicago O'Hare Intl

lun. 10/13

12:30 am-3:45 pm

2 stops27h 15m

$1,591

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

vie. 10/10

9:15 am-3:55 pm

2 stops42h 40m

Chicago O'Hare Intl

mar. 10/14

7:05 pm-12:45 pm

2 stops29h 40m

$1,876

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

vie. 10/10

1:30 pm-2:50 pm

2 stops37h 20m

Chicago O'Hare Intl

mar. 10/14

7:40 pm-10:30 am

2 stops26h 50m

$1,950

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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 septiembre 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ko Samui to Illinois as you normally would.

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 $1,591, EVA Air can have you in Illinois from Ko Samui in 23h 30m. 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.

  • What is the cheapest month to book a flight from Ko Samui to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Ko Samui to Illinois (average of $245). Flying from Ko Samui to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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