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Cheap flights from Illinois to Ko Samui from $745

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Ko Samui departing on 7/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Illinois to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:00 pm - 8:25 pm
ORD
-
USM
42h 25m
2 stops
Multiple Airlines Logo
8:00 am - 8:35 am
USM
-
ORD
36h 35m
2 stops
$1,170Multiple Airlines
Fri, May 1 - Tue, May 5
Etihad Airways Logo
2:00 pm - 3:10 pm
ORD
-
USM
37h 10m
2 stops
Etihad Airways Logo
2:30 pm - 8:35 am
USM
-
ORD
30h 05m
2 stops
$1,336Etihad Airways
Sun, May 3 - Thu, May 7
Etihad Airways Logo
2:00 pm - 8:25 pm
ORD
-
USM
42h 25m
2 stops
Etihad Airways Logo
3:25 pm - 8:35 am
USM
-
ORD
29h 10m
2 stops
$1,376Etihad Airways
Sun, May 3 - Thu, May 7
Etihad Airways Logo
2:00 pm - 7:30 am
ORD
-
USM
29h 30m
2 stops
Etihad Airways Logo
6:55 pm - 3:40 pm
USM
-
ORD
32h 45m
2 stops
$1,506Etihad Airways
Mon, Jul 6 - Mon, Jul 13
Multiple Airlines Logo
2:00 pm - 8:25 pm
ORD
-
USM
42h 25m
2 stops
Multiple Airlines Logo
9:00 pm - 5:59 am
USM
-
ORD
44h 59m
3 stops
$1,672Multiple Airlines
Fri, May 1 - Tue, May 5
Multiple Airlines Logo
2:00 pm - 8:25 pm
ORD
-
USM
42h 25m
2 stops
Multiple Airlines Logo
8:00 am - 8:35 am
USM
-
ORD
36h 35m
2 stops
$1,721Multiple Airlines
Fri, May 29 - Fri, Jun 5
Multiple Airlines Logo
2:00 pm - 7:30 am
ORD
-
USM
29h 30m
2 stops
Multiple Airlines Logo
8:00 am - 7:45 am
USM
-
ORD
35h 45m
3 stops
$1,758Multiple Airlines
Mon, Jul 6 - Mon, Jul 13
Multiple Airlines Logo
8:10 pm - 8:15 am
ORD
-
USM
24h 05m
2 stops
Multiple Airlines Logo
7:15 pm - 5:59 am
USM
-
ORD
46h 44m
3 stops
$1,999Multiple Airlines
Fri, May 29 - Fri, Jun 5
Multiple Airlines Logo
4:15 pm - 7:40 pm
ORD
-
USM
39h 25m
1 stop
Multiple Airlines Logo
9:00 pm - 1:55 pm
USM
-
ORD
52h 55m
2 stops
$2,079Multiple Airlines
Fri, May 1 - Tue, May 5
Multiple Airlines Logo
10:40 am - 7:45 am
ORD
-
USM
33h 05m
3 stops
Multiple Airlines Logo
12:10 pm - 7:45 am
USM
-
ORD
31h 35m
3 stops
$2,201Multiple Airlines
Mon, Jul 6 - Mon, Jul 13

Cathay Pacific flights from Illinois to Ko Samui

Our best Cathay Pacific deals on Illinois to Ko Samui flight tickets
Cathay Pacific
Jul 6
ORD4:00 pmChicago O'Hare Intl
39h 40m
1 stop
USM7:40 pmKo Samui
Jul 13
USM11:55 amKo Samui
38h 25m
1 stop
ORD2:20 pmChicago O'Hare Intl
$2,374
Cathay Pacific
Jul 6
ORD4:00 pmChicago O'Hare Intl
27h 30m
2 stops
USM7:30 amKo Samui
Jul 13
USM11:55 amKo Samui
38h 25m
1 stop
ORD2:20 pmChicago O'Hare Intl
$2,425
Cathay Pacific
May 29
ORD4:15 pmChicago O'Hare Intl
39h 25m
1 stop
USM7:40 pmKo Samui
Jun 5
USM11:55 amKo Samui
38h 00m
1 stop
ORD1:55 pmChicago O'Hare Intl
$3,078

Etihad Airways flights from Illinois to Ko Samui

Our best Etihad Airways deals on Illinois to Ko Samui flight tickets
Etihad Airways
May 3
ORD2:00 pmChicago O'Hare Intl
37h 10m
2 stops
USM3:10 pmKo Samui
May 7
USM2:30 pmKo Samui
30h 05m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,336
Etihad Airways
May 3
ORD2:00 pmChicago O'Hare Intl
42h 25m
2 stops
USM8:25 pmKo Samui
May 7
USM3:25 pmKo Samui
29h 10m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,376
Etihad Airways
Jul 6
ORD2:00 pmChicago O'Hare Intl
29h 30m
2 stops
USM7:30 amKo Samui
Jul 13
USM6:55 pmKo Samui
32h 45m
2 stops
ORD3:40 pmChicago O'Hare Intl
$1,506

momondo 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, momondo users made 832,500 searches. Data last updated April 18, 2026.
Use the filters below to find and compare flights from Illinois to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 5/1

2:00 pm-8:25 pm

2 stops42h 25m

Ko Samui

Tue 5/5

8:00 am-8:35 am

2 stops36h 35m

$1,170

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 5/3

2:00 pm-3:10 pm

2 stops37h 10m

Ko Samui

Thu 5/7

2:30 pm-8:35 am

2 stops30h 05m

$1,336

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 5/3

2:00 pm-8:25 pm

2 stops42h 25m

Ko Samui

Thu 5/7

3:25 pm-8:35 am

2 stops29h 10m

$1,376
Quickest round-trip

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 7/6

2:00 pm-7:30 am

2 stops29h 30m

Ko Samui

Mon 7/13

6:55 pm-3:40 pm

2 stops32h 45m

$1,506

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 5/1

2:00 pm-8:25 pm

2 stops42h 25m

Ko Samui

Tue 5/5

9:00 pm-5:59 am

3 stops44h 59m

$1,672

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 5/29

2:00 pm-8:25 pm

2 stops42h 25m

Ko Samui

Fri 6/5

8:00 am-8:35 am

2 stops36h 35m

$1,721

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 7/6

2:00 pm-7:30 am

2 stops29h 30m

Ko Samui

Mon 7/13

8:00 am-7:45 am

3 stops35h 45m

$1,758

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 5/29

8:10 pm-8:15 am

2 stops24h 05m

Ko Samui

Fri 6/5

7:15 pm-5:59 am

3 stops46h 44m

$1,999

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 5/1

4:15 pm-7:40 pm

1 stop39h 25m

Ko Samui

Tue 5/5

9:00 pm-1:55 pm

2 stops52h 55m

$2,079

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 7/6

10:40 am-7:45 am

3 stops33h 05m

Ko Samui

Mon 7/13

12:10 pm-7:45 am

3 stops31h 35m

$2,201

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Ko Samui from

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

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

Cathay Pacific is the most popular carrier operating from Illinois to Ko Samui

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

Fastest flight time

33h 45m

Direct flights

None
The fastest flight from Illinois to Ko Samui takes 33h 45m
There are no direct flights from Illinois to Ko Samui. There are no popular flight routes from Illinois to Ko Samui.
Search flight deals

Frequently asked questions about flying 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?

  • 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 AirPriceFrom $1,031Free CancellationRating
8.5
1,418 reviews
Search EVA Air flights

Traveling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
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.

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