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Cheap flights from Illinois to Ko Samui from $1,050

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Ko Samui departing on 4/14. 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.
EVA Air Logo
12:30 am - 2:45 pm
ORD
-
USM
26h 15m
2 stops
EVA Air Logo
8:10 am - 9:00 pm
USM
-
ORD
24h 50m
2 stops
$1,050EVA Air
Tue, Apr 14 - Wed, Apr 22
EVA Air Logo
12:30 am - 2:45 pm
ORD
-
USM
26h 15m
2 stops
EVA Air Logo
8:45 am - 9:00 pm
USM
-
ORD
24h 15m
2 stops
$1,110EVA Air
Wed, Apr 15 - Thu, Apr 23
EVA Air Logo
12:30 am - 3:10 pm
ORD
-
USM
26h 40m
2 stops
EVA Air Logo
8:10 am - 9:00 pm
USM
-
ORD
24h 50m
2 stops
$1,170EVA Air
Tue, Apr 14 - Wed, Apr 22
Etihad Airways Logo
2:00 pm - 10:30 am
ORD
-
USM
32h 30m
2 stops
Etihad Airways Logo
3:20 pm - 8:35 am
USM
-
ORD
29h 15m
2 stops
$1,201Etihad Airways
Thu, May 7 - Fri, May 15
EVA Air Logo
12:30 am - 8:15 am
ORD
-
USM
43h 45m
2 stops
EVA Air Logo
8:35 pm - 9:00 pm
USM
-
ORD
36h 25m
2 stops
$1,236EVA Air
Sat, Apr 11 - Sun, Apr 19
Turkish Airlines Logo
8:10 pm - 1:10 pm
ORD
-
USM
29h 00m
2 stops
Turkish Airlines Logo
1:30 pm - 9:40 am
USM
-
ORD
32h 10m
2 stops
$1,262Turkish Airlines
Tue, May 12 - Tue, May 19
Multiple Airlines Logo
4:15 pm - 8:50 pm
ORD
-
USM
40h 35m
2 stops
Multiple Airlines Logo
3:20 pm - 1:55 pm
USM
-
ORD
34h 35m
2 stops
$1,266Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
EVA Air Logo
12:30 am - 1:45 pm
ORD
-
USM
25h 15m
2 stops
EVA Air Logo
11:45 am - 6:05 am
USM
-
ORD
30h 20m
3 stops
$1,269EVA Air
Wed, Apr 15 - Thu, Apr 23
EVA Air Logo
12:30 am - 2:45 pm
ORD
-
USM
26h 15m
2 stops
EVA Air Logo
11:45 am - 5:15 am
USM
-
ORD
29h 30m
3 stops
$1,329EVA Air
Tue, Apr 14 - Wed, Apr 22
Cathay Pacific Logo
4:15 pm - 7:40 pm
ORD
-
USM
39h 25m
1 stop
Cathay Pacific Logo
11:55 am - 1:55 pm
USM
-
ORD
38h 00m
1 stop
$1,346Cathay Pacific
Wed, Apr 15 - Wed, Apr 22

Cathay Pacific flights from Illinois to Ko Samui

Our best Cathay Pacific deals on Illinois to Ko Samui flight tickets
Cathay Pacific
Apr 15
ORD4:15 pmChicago O'Hare Intl
39h 25m
1 stop
USM7:40 pmKo Samui
Apr 22
USM11:55 amKo Samui
38h 00m
1 stop
ORD1:55 pmChicago O'Hare Intl
$1,346
Cathay Pacific
Apr 15
ORD4:15 pmChicago O'Hare Intl
27h 15m
2 stops
USM7:30 amKo Samui
Apr 22
USM11:55 amKo Samui
38h 00m
1 stop
ORD1:55 pmChicago O'Hare Intl
$1,366
Cathay Pacific
Apr 15
ORD4:15 pmChicago O'Hare Intl
28h 00m
2 stops
USM8:15 amKo Samui
Apr 22
USM11:55 amKo Samui
38h 00m
1 stop
ORD1:55 pmChicago O'Hare Intl
$1,368

Malaysia Airlines flights from Illinois to Ko Samui

Our best Malaysia Airlines deals on Illinois to Ko Samui flight tickets
Malaysia Airlines
Apr 16
ORD7:20 pmChicago O'Hare Intl
33h 45m
3 stops
USM5:05 pmKo Samui
Apr 23
USM3:25 pmKo Samui
27h 55m
3 stops
ORD7:20 amChicago O'Hare Intl
$2,696
Malaysia Airlines
Apr 15
ORD7:20 pmChicago O'Hare Intl
33h 45m
3 stops
USM5:05 pmKo Samui
Apr 22
USM3:50 pmKo Samui
27h 30m
3 stops
ORD7:20 amChicago O'Hare Intl
$2,869
Malaysia Airlines
Apr 15
ORD7:20 pmChicago O'Hare Intl
33h 45m
3 stops
USM5:05 pmKo Samui
Apr 22
USM3:25 pmKo Samui
27h 55m
3 stops
ORD7:20 amChicago O'Hare Intl
$2,870

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 March 3, 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

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 4/14

12:30 am-2:45 pm

2 stops26h 15m

Ko Samui

Wed 4/22

8:10 am-9:00 pm

2 stops24h 50m

$1,050

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 4/15

12:30 am-2:45 pm

2 stops26h 15m

Ko Samui

Thu 4/23

8:45 am-9:00 pm

2 stops24h 15m

$1,110

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 4/14

12:30 am-3:10 pm

2 stops26h 40m

Ko Samui

Wed 4/22

8:10 am-9:00 pm

2 stops24h 50m

$1,170

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 5/7

2:00 pm-10:30 am

2 stops32h 30m

Ko Samui

Fri 5/15

3:20 pm-8:35 am

2 stops29h 15m

$1,201

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 4/11

12:30 am-8:15 am

2 stops43h 45m

Ko Samui

Sun 4/19

8:35 pm-9:00 pm

2 stops36h 25m

$1,236

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 5/12

8:10 pm-1:10 pm

2 stops29h 00m

Ko Samui

Tue 5/19

1:30 pm-9:40 am

2 stops32h 10m

$1,262

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 4/8

4:15 pm-8:50 pm

2 stops40h 35m

Ko Samui

Wed 4/15

3:20 pm-1:55 pm

2 stops34h 35m

$1,266

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 4/15

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Thu 4/23

11:45 am-6:05 am

3 stops30h 20m

$1,269

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 4/14

12:30 am-2:45 pm

2 stops26h 15m

Ko Samui

Wed 4/22

11:45 am-5:15 am

3 stops29h 30m

$1,329

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 4/15

4:15 pm-7:40 pm

1 stop39h 25m

Ko Samui

Wed 4/22

11:55 am-1:55 pm

1 stop38h 00m

$1,346

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 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

Fastest flight time

29h 00m

Direct flights

None
The fastest flight from Illinois to Ko Samui takes 29h 00m
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?

  • 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 $1,098Free CancellationRating
8.4
1,362 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 Tao
Ko Pha Ngan
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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