What is the cheapest airline that flies from Illinois to Ko Samui?

EVA Air is the most popular carrier operating from Illinois to Ko Samui

When did momondo last update prices for flights from Illinois to Ko Samui Airport?

Prices for flights from Illinois to Ko Samui Airport refresh daily.

How many operators does momondo search for flights from Illinois to Ko Samui Airport?

There is 1 operator available for flights from Illinois to Ko Samui Airport as of September 2025.

How old do you have to be to fly from Illinois to Ko Samui Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Ko Samui Airport.

What documentation or ID do you need to fly to Ko Samui Airport?

The travel and health documents required for your trip to Ko Samui Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ko Samui Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$909 Cheap Flights from Illinois to Ko Samui in 2025/26

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Find the cheapest flights from Illinois to Ko Samui

Round-trip

One-way

Last minute

Cheap round-trip flights

2:35 pm - 7:10 amORD-USM

27h 35m2 stops

7:00 am - 1:55 pmUSM-ORD

42h 55m2 stops

$909Multiple Airlines

Find Deal

Tue, Mar 3 - Tue, Mar 17

5:35 pm - 8:10 amORD-USM

25h 35m2 stops

7:35 pm - 1:40 pmUSM-ORD

31h 05m2 stops

$955Multiple Airlines

Find Deal

Wed, Nov 5 - Wed, Nov 12

1:05 am - 6:30 pmORD-USM

29h 25m2 stops

7:00 am - 1:40 pmUSM-ORD

43h 40m2 stops

$969Japan Airlines

Find Deal

Mon, Oct 20 - Wed, Nov 5

9:20 pm - 8:25 pmORD-USM

35h 05m2 stops

7:30 pm - 11:05 amUSM-ORD

27h 35m2 stops

$982Turkish Airlines

Find Deal

Fri, Mar 13 - Thu, Mar 19

9:20 pm - 8:25 pmORD-USM

35h 05m2 stops

5:40 pm - 11:05 amUSM-ORD

29h 25m2 stops

$1,010Turkish Airlines

Find Deal

Fri, Mar 13 - Thu, Mar 19

12:30 am - 1:45 pmORD-USM

25h 15m2 stops

10:00 am - 7:35 pmUSM-ORD

22h 35m2 stops

$1,035EVA Air

Find Deal

Mon, Oct 20 - Thu, Nov 6

12:30 am - 8:50 pmORD-USM

32h 20m2 stops

7:00 am - 7:35 pmUSM-ORD

25h 35m2 stops

$1,036Multiple Airlines

Find Deal

Tue, Oct 21 - Wed, Nov 12

1:55 pm - 7:20 amORD-USM

29h 25m2 stops

6:15 pm - 7:35 amUSM-ORD

50h 20m2 stops

$1,050Etihad Airways

Find Deal

Mon, Oct 13 - Mon, Nov 10

12:30 am - 1:45 pmORD-USM

25h 15m2 stops

9:35 am - 7:35 pmUSM-ORD

23h 00m2 stops

$1,073EVA Air

Find Deal

Mon, Oct 20 - Fri, Nov 7

1:55 pm - 7:20 amORD-USM

29h 25m2 stops

9:10 pm - 7:35 amUSM-ORD

47h 25m2 stops

$1,085Etihad Airways

Find Deal

Sat, Oct 18 - Sun, Nov 9

EVA Air flights from Illinois to Ko Samui

Our best EVA Air deals on Illinois to Ko Samui flight tickets

EVA Air

Oct 20

ORD12:30 amChicago O'Hare Intl

25h 15m

2 stops

USM1:45 pmKo Samui

Nov 6

USM10:00 amKo Samui

22h 35m

2 stops

ORD7:35 pmChicago O'Hare Intl

$1,035

Find similar

EVA Air

Oct 20

ORD12:30 amChicago O'Hare Intl

25h 15m

2 stops

USM1:45 pmKo Samui

Nov 7

USM9:35 amKo Samui

23h 00m

2 stops

ORD7:35 pmChicago O'Hare Intl

$1,073

Find similar

EVA Air

Mar 12

ORD12:30 amChicago O'Hare Intl

26h 25m

2 stops

USM2:55 pmKo Samui

Mar 19

USM9:20 amKo Samui

23h 15m

2 stops

ORD8:35 pmChicago O'Hare Intl

$1,074

Find similar

Qatar Airways flights from Illinois to Ko Samui

Our best Qatar Airways deals on Illinois to Ko Samui flight tickets

Qatar Airways

Oct 19

ORD7:40 pmChicago O'Hare Intl

34h 35m

2 stops

USM6:15 pmKo Samui

Nov 8

USM8:15 amKo Samui

43h 15m

2 stops

ORD2:30 pmChicago O'Hare Intl

$1,391

Find similar

Qatar Airways

Oct 24

ORD7:40 pmChicago O'Hare Intl

49h 40m

2 stops

USM9:20 amKo Samui

Nov 6

USM8:15 amKo Samui

43h 15m

2 stops

ORD2:30 pmChicago O'Hare Intl

$1,573

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 3/3

2:35 pm-7:10 am

2 stops27h 35m

Ko Samui

Tue 3/17

7:00 am-1:55 pm

2 stops42h 55m

$909

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 11/5

5:35 pm-8:10 am

2 stops25h 35m

Ko Samui

Wed 11/12

7:35 pm-1:40 pm

2 stops31h 05m

$955

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 10/20

1:05 am-6:30 pm

2 stops29h 25m

Ko Samui

Wed 11/5

7:00 am-1:40 pm

2 stops43h 40m

$969

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 3/13

9:20 pm-8:25 pm

2 stops35h 05m

Ko Samui

Thu 3/19

7:30 pm-11:05 am

2 stops27h 35m

$982

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 3/13

9:20 pm-8:25 pm

2 stops35h 05m

Ko Samui

Thu 3/19

5:40 pm-11:05 am

2 stops29h 25m

$1,010

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 10/20

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Thu 11/6

10:00 am-7:35 pm

2 stops22h 35m

$1,035

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 10/21

12:30 am-8:50 pm

2 stops32h 20m

Ko Samui

Wed 11/12

7:00 am-7:35 pm

2 stops25h 35m

$1,036

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 10/13

1:55 pm-7:20 am

2 stops29h 25m

Ko Samui

Mon 11/10

6:15 pm-7:35 am

2 stops50h 20m

$1,050

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 10/20

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Fri 11/7

9:35 am-7:35 pm

2 stops23h 00m

$1,073

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 10/18

1:55 pm-7:20 am

2 stops29h 25m

Ko Samui

Sun 11/9

9:10 pm-7:35 am

2 stops47h 25m

$1,085

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Illinois to Ko Samui

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Ko Samui?

Our data shows that Friday is the least expensive day to fly to Ko Samui. Tickets to fly out on this day can be as low as $254. Flights from Illinois to Ko Samui on a Sunday will generally be more expensive and average around $484. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ko Samui?

Our data shows that the cheapest Illinois to Ko Samui flights are usually those with departure times in the evening. Our users have found flights to Ko Samui in the evening for as low as $199. In the afternoon is when there is more demand to fly to Ko Samui, so prices are often more expensive at around $545 per ticket.

Cheap Illinois to Ko Samui flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Ko Samui

Direct flights	None

There are no direct flights from Illinois to Ko Samui. There are no popular flight routes from Illinois to Ko Samui.

Search flight deals

When did momondo last update prices for flights from Illinois to Ko Samui Airport?
Prices for flights from Illinois to Ko Samui Airport refresh daily.
How many operators does momondo search for flights from Illinois to Ko Samui Airport?
There is 1 operator available for flights from Illinois to Ko Samui Airport as of September 2025.
How old do you have to be to fly from Illinois to Ko Samui Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Ko Samui Airport.
What documentation or ID do you need to fly to Ko Samui Airport?
The travel and health documents required for your trip to Ko Samui Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ko Samui Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Illinois to Ko Samui

Compare and see reviews for airlines that fly from Illinois to Ko Samui with momondo

Airline	Rating	Free Cancellation	Price
EVA Air	PriceFrom $1,112	Free Cancellation	Rating 8.4 1,238 reviews		Search EVA Air flights

Ko Pha Ngan

Ko Tao

Khanom

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Ko Samui?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Ko Samui for you.

Can I find flights from Illinois to Ko Samui with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Ko Samui flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Ko Samui?

Once you have performed a search for Illinois to Ko Samui flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Illinois to Ko Samui right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ko Samui from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.