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

EVA Air, Turkish Airlines, and Cathay Pacific are the most popular carriers 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 August 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.

$565 Cheap Flights from Illinois to Ko Samui in 2025

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Illinois to Ko Samui

Round-trip

One-way

Cheap round-trip flights

8:20 pm - 11:50 amORD-USM

26h 30m2 stops

7:00 am - 10:05 amUSM-ORD

40h 05m2 stops

$926Turkish Airlines

Find Deal

dom., nov. 9 - mié., nov. 19

1:05 am - 5:45 pmORD-USM

28h 40m2 stops

7:10 pm - 3:45 pmUSM-ORD

32h 35m2 stops

$944

Find Deal

sáb., sep. 13 - dom., sep. 21

12:30 am - 8:50 pmORD-USM

32h 20m2 stops

7:00 am - 8:45 pmUSM-ORD

25h 45m2 stops

$1,146EVA Air

Find Deal

jue., sep. 4 - mié., sep. 17

12:30 am - 3:45 pmORD-USM

27h 15m2 stops

9:15 am - 8:45 pmUSM-ORD

23h 30m2 stops

$1,284EVA Air

Find Deal

sáb., sep. 27 - jue., oct. 2

7:20 pm - 10:30 amORD-USM

27h 10m2 stops

2:30 pm - 3:05 pmUSM-ORD

36h 35m2 stops

$1,330Qatar Airways

Find Deal

vie., sep. 5 - mié., sep. 17

4:00 pm - 6:35 pmORD-USM

38h 35m1 stop

10:55 am - 2:25 pmUSM-ORD

39h 30m1 stop

$1,531Cathay Pacific

Find Deal

vie., sep. 5 - mié., sep. 17

4:00 pm - 6:35 pmORD-USM

38h 35m1 stop

8:00 am - 2:25 pmUSM-ORD

42h 25m2 stops

$1,550Cathay Pacific

Find Deal

vie., sep. 5 - mié., sep. 17

6:45 am - 6:15 pmORD-USM

46h 30m3 stops

4:25 pm - 4:57 pmUSM-ORD

37h 32m2 stops

$1,836Singapore Airlines

Find Deal

dom., nov. 9 - mié., nov. 19

6:45 am - 6:15 pmORD-USM

46h 30m3 stops

4:25 pm - 4:57 pmUSM-ORD

37h 32m2 stops

$1,838Singapore Airlines

Find Deal

dom., nov. 9 - mié., nov. 19

12:00 pm - 2:55 pmORD-USM

37h 55m3 stops

7:00 pm - 2:30 pmUSM-ORD

32h 30m2 stops

$2,223Qatar Airways

Find Deal

sáb., nov. 8 - sáb., nov. 15

Turkish Airlines flights from Illinois to Ko Samui

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

Turkish Airlines

Nov 9

ORD8:20 pmChicago O'Hare Intl

26h 30m

2 stops

USM11:50 amKo Samui

Nov 19

USM7:00 amKo Samui

40h 05m

2 stops

ORD10:05 amChicago O'Hare Intl

$926

Find similar

Turkish Airlines

Sep 20

ORD11:45 pmChicago O'Hare Intl

30h 45m

2 stops

USM6:30 pmKo Samui

Sep 29

USM4:25 pmKo Samui

29h 15m

2 stops

ORD9:40 amChicago O'Hare Intl

$978

Find similar

Turkish Airlines

Nov 9

ORD11:50 amChicago O'Hare Intl

35h 00m

2 stops

USM11:50 amKo Samui

Nov 19

USM7:00 amKo Samui

40h 05m

2 stops

ORD10:05 amChicago O'Hare Intl

$1,044

Find similar

Cathay Pacific flights from Illinois to Ko Samui

Our best Cathay Pacific deals on Illinois to Ko Samui flight tickets

Cathay Pacific

Sep 5

ORD4:00 pmChicago O'Hare Intl

38h 35m

1 stop

USM6:35 pmKo Samui

Sep 17

USM10:55 amKo Samui

39h 30m

1 stop

ORD2:25 pmChicago O'Hare Intl

$1,531

Find similar

Cathay Pacific

Sep 5

ORD4:00 pmChicago O'Hare Intl

38h 35m

1 stop

USM6:35 pmKo Samui

Sep 17

USM8:00 amKo Samui

42h 25m

2 stops

ORD2:25 pmChicago O'Hare Intl

$1,550

Find similar

Cathay Pacific

Aug 11

ORD4:00 pmChicago O'Hare Intl

38h 35m

1 stop

USM6:35 pmKo Samui

Aug 27

USM10:55 amKo Samui

39h 30m

1 stop

ORD2:25 pmChicago O'Hare Intl

$8,201

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

dom. 11/9

8:20 pm-11:50 am

2 stops26h 30m

Ko Samui

mié. 11/19

7:00 am-10:05 am

2 stops40h 05m

$926

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

sáb. 9/13

1:05 am-5:45 pm

2 stops28h 40m

Ko Samui

dom. 9/21

7:10 pm-3:45 pm

2 stops32h 35m

$944

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

jue. 9/4

12:30 am-8:50 pm

2 stops32h 20m

Ko Samui

mié. 9/17

7:00 am-8:45 pm

2 stops25h 45m

$1,146

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

sáb. 9/27

12:30 am-3:45 pm

2 stops27h 15m

Ko Samui

jue. 10/2

9:15 am-8:45 pm

2 stops23h 30m

$1,284

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

vie. 9/5

7:20 pm-10:30 am

2 stops27h 10m

Ko Samui

mié. 9/17

2:30 pm-3:05 pm

2 stops36h 35m

$1,330

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

vie. 9/5

4:00 pm-6:35 pm

1 stop38h 35m

Ko Samui

mié. 9/17

10:55 am-2:25 pm

1 stop39h 30m

$1,531

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

vie. 9/5

4:00 pm-6:35 pm

1 stop38h 35m

Ko Samui

mié. 9/17

8:00 am-2:25 pm

2 stops42h 25m

$1,550

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

dom. 11/9

6:45 am-6:15 pm

3 stops46h 30m

Ko Samui

mié. 11/19

4:25 pm-4:57 pm

2 stops37h 32m

$1,836

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

dom. 11/9

6:45 am-6:15 pm

3 stops46h 30m

Ko Samui

mié. 11/19

4:25 pm-4:57 pm

2 stops37h 32m

$1,838

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

sáb. 11/8

12:00 pm-2:55 pm

3 stops37h 55m

Ko Samui

sáb. 11/15

7:00 pm-2:30 pm

2 stops32h 30m

$2,223

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

Best Price Found	$565
Fastest flight time	24h 25m
Direct flights	None
Airports in Ko Samui	1 airport

The best one-way flight to Ko Samui from Illinois in the past 72 hours is $565. The best round-trip flight deal from Illinois to Ko Samui found on momondo in the last 72 hours is $926.

The fastest flight from Illinois to Ko Samui takes 24h 25m

There are no direct flights from Illinois to Ko Samui. Popular non-direct route for this connection is Chicago O'Hare Intl Airport - Ko Samui Airport.

There is 1 airport near Ko Samui: Ko Samui (USM)

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 August 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 $1,117	Free Cancellation	Rating 8.4 1,220 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.