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

EVA Air, Qatar Airways, and Cathay Pacific are the most popular carriers operating from Chicago to Ko Samui

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

Prices for flights from Chicago to Ko Samui Airport were last updated today.

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

As of October 2025, there is 1 operator available to choose from for flights from Chicago to Ko Samui Airport.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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.

$66 Cheap Flights from Chicago to Ko Samui in 2025/26

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Find the cheapest flights from Chicago to Ko Samui

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:30 pm - 2:55 pmORD-USM

26h 25m2 stops

9:10 pm - 8:35 pmUSM-ORD

35h 25m2 stops

$1,038EVA Air

Find Deal

Mon, Mar 2 - Sun, Mar 15

10:20 am - 8:10 amORD-USM

32h 50m2 stops

7:00 pm - 2:41 pmUSM-ORD

32h 41m2 stops

$1,058Multiple Airlines

Find Deal

Mon, Nov 10 - Sun, Nov 23

11:30 pm - 2:55 pmORD-USM

26h 25m2 stops

7:55 am - 7:35 pmUSM-ORD

24h 40m2 stops

$1,076EVA Air

Find Deal

Wed, Nov 12 - Fri, Nov 21

12:30 am - 4:25 pmORD-USM

27h 55m2 stops

8:50 pm - 9:00 pmUSM-ORD

36h 10m2 stops

$1,096EVA Air

Find Deal

Mon, Mar 9 - Tue, Apr 7

9:20 pm - 6:25 pmORD-USM

33h 05m2 stops

1:30 pm - 9:40 amUSM-ORD

32h 10m2 stops

$1,135Multiple Airlines

Find Deal

Tue, Mar 10 - Tue, Apr 7

11:50 am - 6:15 pmORD-USM

41h 25m2 stops

1:25 pm - 10:05 amUSM-ORD

33h 40m2 stops

$1,139Turkish Airlines

Find Deal

Sun, Nov 30 - Sat, Dec 6

9:20 pm - 1:05 pmORD-USM

27h 45m2 stops

1:30 pm - 9:40 amUSM-ORD

32h 10m2 stops

$1,142Turkish Airlines

Find Deal

Tue, Mar 10 - Tue, Apr 7

2:35 pm - 7:35 pmORD-USM

40h 00m1 stop

11:40 am - 12:55 pmUSM-ORD

38h 15m1 stop

$1,330Cathay Pacific

Find Deal

Mon, Nov 10 - Sun, Nov 23

2:35 pm - 7:35 pmORD-USM

40h 00m1 stop

11:40 am - 1:55 pmUSM-ORD

38h 15m1 stop

$1,346Cathay Pacific

Find Deal

Mon, Mar 2 - Sun, Mar 15

6:50 pm - 10:35 amORD-USM

26h 45m2 stops

7:35 pm - 2:30 pmUSM-ORD

31h 55m2 stops

$1,530Qatar Airways

Find Deal

Sat, Feb 14 - Sun, Feb 22

Turkish Airlines flights from Chicago to Ko Samui

Our best Turkish Airlines deals on Chicago to Ko Samui flight tickets

Turkish Airlines

Nov 30

ORD11:50 amChicago O'Hare Intl

41h 25m

2 stops

USM6:15 pmKo Samui

Dec 6

USM1:25 pmKo Samui

33h 40m

2 stops

ORD10:05 amChicago O'Hare Intl

$1,139

Find similar

Turkish Airlines

Mar 10

ORD9:20 pmChicago O'Hare Intl

27h 45m

2 stops

USM1:05 pmKo Samui

Apr 7

USM1:30 pmKo Samui

32h 10m

2 stops

ORD9:40 amChicago O'Hare Intl

$1,142

Find similar

Turkish Airlines

Jan 10

ORD8:20 pmChicago O'Hare Intl

32h 30m

2 stops

USM5:50 pmKo Samui

Jan 18

USM1:25 pmKo Samui

33h 40m

2 stops

ORD10:05 amChicago O'Hare Intl

$1,375

Find similar

EVA Air flights from Chicago to Ko Samui

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

EVA Air

Mar 2

ORD11:30 pmChicago O'Hare Intl

26h 25m

2 stops

USM2:55 pmKo Samui

Mar 15

USM9:10 pmKo Samui

35h 25m

2 stops

ORD8:35 pmChicago O'Hare Intl

$1,038

Find similar

EVA Air

Nov 12

ORD11:30 pmChicago O'Hare Intl

26h 25m

2 stops

USM2:55 pmKo Samui

Nov 21

USM7:55 amKo Samui

24h 40m

2 stops

ORD7:35 pmChicago O'Hare Intl

$1,076

Find similar

EVA Air

Mar 9

ORD12:30 amChicago O'Hare Intl

27h 55m

2 stops

USM4:25 pmKo Samui

Apr 7

USM8:50 pmKo Samui

36h 10m

2 stops

ORD9:00 pmChicago O'Hare Intl

$1,096

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/2

11:30 pm-2:55 pm

2 stops26h 25m

Ko Samui

Sun 3/15

9:10 pm-8:35 pm

2 stops35h 25m

$1,038

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 11/10

10:20 am-8:10 am

2 stops32h 50m

Ko Samui

Sun 11/23

7:00 pm-2:41 pm

2 stops32h 41m

$1,058

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 11/12

11:30 pm-2:55 pm

2 stops26h 25m

Ko Samui

Fri 11/21

7:55 am-7:35 pm

2 stops24h 40m

$1,076

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/9

12:30 am-4:25 pm

2 stops27h 55m

Ko Samui

Tue 4/7

8:50 pm-9:00 pm

2 stops36h 10m

$1,096

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 3/10

9:20 pm-6:25 pm

2 stops33h 05m

Ko Samui

Tue 4/7

1:30 pm-9:40 am

2 stops32h 10m

$1,135

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 11/30

11:50 am-6:15 pm

2 stops41h 25m

Ko Samui

Sat 12/6

1:25 pm-10:05 am

2 stops33h 40m

$1,139

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 3/10

9:20 pm-1:05 pm

2 stops27h 45m

Ko Samui

Tue 4/7

1:30 pm-9:40 am

2 stops32h 10m

$1,142

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 11/10

2:35 pm-7:35 pm

1 stop40h 00m

Ko Samui

Sun 11/23

11:40 am-12:55 pm

1 stop38h 15m

$1,330

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/2

2:35 pm-7:35 pm

1 stop40h 00m

Ko Samui

Sun 3/15

11:40 am-1:55 pm

1 stop38h 15m

$1,346

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 2/14

6:50 pm-10:35 am

2 stops26h 45m

Ko Samui

Sun 2/22

7:35 pm-2:30 pm

2 stops31h 55m

$1,530

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 Chicago 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 Chicago 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 Chicago 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.

When to book flights from Chicago to Ko Samui

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Ko Samui according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Chicago to Ko Samui (CHI to USM) flight deals and tips

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

Direct flights	None

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

Search flight deals

How far is Chicago to Ko Samui by plane?
There are 8846.2 mi between Chicago and Ko Samui. 26h 25m is a normal flight duration for this route.
When did momondo last update prices for flights from Chicago to Ko Samui Airport?
Prices for flights from Chicago to Ko Samui Airport were last updated today.
How many operators does momondo search for flights from Chicago to Ko Samui Airport?
As of October 2025, there is 1 operator available to choose from for flights from Chicago to Ko Samui Airport.
How old do you have to be to fly from Chicago to Ko Samui Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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 Chicago to Ko Samui

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

Airline	Rating	Free Cancellation	Price
EVA Air	PriceFrom $1,112	Free Cancellation	Rating 8.4 1,268 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 Chicago to Ko Samui?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Ko Samui. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Ko Samui from Chicago with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ko Samui from Chicago.

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

Yes momondo offers price alerts on flights to Ko Samui from Chicago. 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.