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Cheap flights from Illinois to Ko Samui from $1,124

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 8/30. 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
1 adult, Economy, 0 bags

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
4:00 pm - 6:00 pm
ORD
-
USM
38h 00m
2 stops
Multiple Airlines Logo
8:00 am - 2:20 pm
USM
-
ORD
42h 20m
2 stops
$1,124Multiple Airlines
Sun, Aug 30 - Sun, Sep 6
Turkish Airlines Logo
11:25 am - 9:10 pm
ORD
-
USM
45h 45m
2 stops
Turkish Airlines Logo
1:30 pm - 6:15 pm
USM
-
ORD
40h 45m
2 stops
$1,312Turkish Airlines
Wed, Sep 30 - Sun, Oct 4
EVA Air Logo
12:30 am - 3:45 pm
ORD
-
USM
27h 15m
2 stops
EVA Air Logo
6:00 am - 8:45 pm
USM
-
ORD
26h 45m
2 stops
$1,319EVA Air
Tue, Sep 29 - Sun, Oct 4
Multiple Airlines Logo
7:20 pm - 6:00 pm
ORD
-
USM
34h 40m
2 stops
Multiple Airlines Logo
8:00 am - 3:05 pm
USM
-
ORD
43h 05m
3 stops
$1,408Multiple Airlines
Sun, Aug 30 - Sun, Sep 6
Cathay Pacific Logo
4:00 pm - 7:40 pm
ORD
-
USM
39h 40m
1 stop
Cathay Pacific Logo
11:55 am - 2:20 pm
USM
-
ORD
38h 25m
1 stop
$1,469Cathay Pacific
Sun, Aug 30 - Sun, Sep 6
Cathay Pacific Logo
4:00 pm - 7:30 am
ORD
-
USM
27h 30m
2 stops
Cathay Pacific Logo
11:55 am - 2:20 pm
USM
-
ORD
38h 25m
1 stop
$1,525Cathay Pacific
Sun, Aug 30 - Sun, Sep 6
EVA Air Logo
12:30 am - 7:50 am
ORD
-
USM
43h 20m
2 stops
EVA Air Logo
8:20 am - 9:10 pm
USM
-
ORD
24h 50m
2 stops
$1,585EVA Air
Sat, Aug 1 - Sat, Aug 8
Multiple Airlines Logo
2:00 pm - 1:45 pm
ORD
-
USM
35h 45m
2 stops
Multiple Airlines Logo
8:45 am - 8:35 am
USM
-
ORD
35h 50m
2 stops
$1,586Multiple Airlines
Sat, Aug 15 - Fri, Aug 21
Multiple Airlines Logo
2:00 pm - 10:10 am
ORD
-
USM
32h 10m
3 stops
Multiple Airlines Logo
8:45 am - 9:10 pm
USM
-
ORD
24h 25m
2 stops
$1,789Multiple Airlines
Sat, Aug 15 - Fri, Aug 21
Multiple Airlines Logo
12:30 am - 7:30 am
ORD
-
USM
43h 00m
2 stops
Multiple Airlines Logo
9:25 pm - 9:10 pm
USM
-
ORD
35h 45m
2 stops
$1,830Multiple Airlines
Sat, Aug 1 - Sat, Aug 8

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EVA Air flights from Illinois to Ko Samui

Our best EVA Air deals on Illinois to Ko Samui flight tickets
EVA Air
Nov 24
ORD11:30 pmChicago O'Hare Intl
26h 25m
2 stops
USM2:55 pmKo Samui
Dec 8
USM7:00 amKo Samui
25h 35m
2 stops
ORD7:35 pmChicago O'Hare Intl
$1,202
EVA Air
Sep 29
ORD12:30 amChicago O'Hare Intl
27h 15m
2 stops
USM3:45 pmKo Samui
Oct 4
USM6:00 amKo Samui
26h 45m
2 stops
ORD8:45 pmChicago O'Hare Intl
$1,319
EVA Air
Jan 15
ORD11:30 pmChicago O'Hare Intl
27h 10m
2 stops
USM3:40 pmKo Samui
Feb 12
USM7:10 pmKo Samui
37h 25m
2 stops
ORD7:35 pmChicago O'Hare Intl
$1,334

Cathay Pacific flights from Illinois to Ko Samui

Our best Cathay Pacific deals on Illinois to Ko Samui flight tickets
Cathay Pacific
Aug 30
ORD4:00 pmChicago O'Hare Intl
39h 40m
1 stop
USM7:40 pmKo Samui
Sep 6
USM11:55 amKo Samui
38h 25m
1 stop
ORD2:20 pmChicago O'Hare Intl
$1,469
Cathay Pacific
Aug 30
ORD4:00 pmChicago O'Hare Intl
27h 30m
2 stops
USM7:30 amKo Samui
Sep 6
USM11:55 amKo Samui
38h 25m
1 stop
ORD2:20 pmChicago O'Hare Intl
$1,525
Cathay Pacific
Aug 29
ORD4:00 pmChicago O'Hare Intl
39h 40m
1 stop
USM7:40 pmKo Samui
Sep 5
USM11:55 amKo Samui
38h 25m
1 stop
ORD2:20 pmChicago O'Hare Intl
$1,609

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 July 20, 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

Sun 8/30

4:00 pm-6:00 pm

2 stops38h 00m

Ko Samui

Sun 9/6

8:00 am-2:20 pm

2 stops42h 20m

$1,124

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 9/30

11:25 am-9:10 pm

2 stops45h 45m

Ko Samui

Sun 10/4

1:30 pm-6:15 pm

2 stops40h 45m

$1,312
Quickest round-trip

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 9/29

12:30 am-3:45 pm

2 stops27h 15m

Ko Samui

Sun 10/4

6:00 am-8:45 pm

2 stops26h 45m

$1,319

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 8/30

7:20 pm-6:00 pm

2 stops34h 40m

Ko Samui

Sun 9/6

8:00 am-3:05 pm

3 stops43h 05m

$1,408

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 8/30

4:00 pm-7:40 pm

1 stop39h 40m

Ko Samui

Sun 9/6

11:55 am-2:20 pm

1 stop38h 25m

$1,469

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 8/30

4:00 pm-7:30 am

2 stops27h 30m

Ko Samui

Sun 9/6

11:55 am-2:20 pm

1 stop38h 25m

$1,525

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 8/1

12:30 am-7:50 am

2 stops43h 20m

Ko Samui

Sat 8/8

8:20 am-9:10 pm

2 stops24h 50m

$1,585

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 8/15

2:00 pm-1:45 pm

2 stops35h 45m

Ko Samui

Fri 8/21

8:45 am-8:35 am

2 stops35h 50m

$1,586

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 8/15

2:00 pm-10:10 am

3 stops32h 10m

Ko Samui

Fri 8/21

8:45 am-9:10 pm

2 stops24h 25m

$1,789

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 8/1

12:30 am-7:30 am

2 stops43h 00m

Ko Samui

Sat 8/8

9:25 pm-9:10 pm

2 stops35h 45m

$1,830

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

24h 00m

Direct flights

None
The fastest flight from Illinois to Ko Samui takes 24h 00m
There are no direct flights from Illinois to Ko Samui. There are no popular flight routes from Illinois to Ko Samui.
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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 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.

Frequently asked questions about flying from Illinois to Ko Samui

  • How do I get Price Alerts for flights from Illinois to Ko Samui?

    Search flight deals from Illinois to Ko Samui. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from Illinois to Ko Samui with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

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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