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Ko Samui

$476+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — USM
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$980
(FlightHub)

One-way from

$476
(Booking.com)
From Illinois to Ko Samui
Search Deals
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 September 11, 2025.

This SmartFares deal was found by Cheapflights users on 9/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3012:30 amORD - USM
2 stops25h 15mEVA Air
Wed 10/158:00 amUSM - ORD
2 stops24h 45mEVA Air
Deal found 9/11$1,050
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/3011:50 amORD - USM
2 stops30h 20mMultiple Airlines
Sat 12/68:30 pmUSM - ORD
2 stops34h 55mMultiple Airlines
Deal found 9/10$1,057
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/711:50 amORD - USM
2 stops30h 55mMultiple Airlines
Fri 12/268:40 pmUSM - ORD
2 stops34h 45mMultiple Airlines
Deal found 9/10$1,186
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.
Wed 10/112:30 amORD - USM
2 stops26h 40mEVA Air
Mon 10/68:00 amUSM - ORD
2 stops24h 45mEVA Air
Deal found 9/10$1,238
This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/301:05 amORD - USM
2 stops46h 35mMultiple Airlines
Wed 10/158:45 amUSM - ORD
3 stops38h 48mMultiple Airlines
Deal found 9/11$1,247
This Emirates 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:35 pmORD - USM
2 stops36h 35mEmirates
Mon 10/64:25 pmUSM - ORD
2 stops35h 20mEmirates
Deal found 9/9$1,834

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 September 11, 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

Tue 9/30

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Wed 10/15

8:00 am-8:45 pm

2 stops24h 45m

$1,050

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 11/30

11:50 am-7:10 am

2 stops30h 20m

Ko Samui

Sat 12/6

8:30 pm-6:25 pm

2 stops34h 55m

$1,057

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 12/7

11:50 am-7:45 am

2 stops30h 55m

Ko Samui

Fri 12/26

8:40 pm-6:25 pm

2 stops34h 45m

$1,186

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 10/1

12:30 am-3:10 pm

2 stops26h 40m

Ko Samui

Mon 10/6

8:00 am-8:45 pm

2 stops24h 45m

$1,238

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 10/1

12:10 pm-10:10 am

2 stops34h 00m

Ko Samui

Wed 10/15

7:10 pm-3:45 pm

2 stops32h 35m

$1,358

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 10/6

1:05 am-10:10 am

2 stops45h 05m

$476

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 10/11

7:40 pm-9:10 pm

2 stops37h 30m

$548

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 10/7

4:00 pm-6:35 pm

1 stop38h 35m

$861

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 10/11

4:00 pm-6:35 pm

1 stop38h 35m

$981

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 10/10

12:30 am-8:30 pm

2 stops32h 00m

$1,010

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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 September 11, 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.

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.

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

    For as low as $1,050, EVA Air can have you in Ko Samui from Illinois in 25h 15m. The distance between Illinois and Ko Samui is about 8835 mi.

  • 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 Ko Samui?

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

Browse thousands of different options on Cheapflights for your next trip

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,112Average$1,311FlexibilityNo cancel feeOn-time74%

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