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Cheap flights from Illinois to Ko Samui from $964

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 6/30. 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
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 - 7:10 am
ORD
-
USM
29h 10m
2 stops
Multiple Airlines Logo
7:00 pm - 3:40 pm
USM
-
ORD
32h 40m
2 stops
$1,067Multiple Airlines
Fri, Sep 18 - Fri, Sep 25
Multiple Airlines Logo
8:20 pm - 10:40 am
ORD
-
USM
25h 20m
2 stops
Multiple Airlines Logo
6:15 pm - 3:00 pm
USM
-
ORD
33h 45m
2 stops
$1,118Multiple Airlines
Mon, Nov 16 - Mon, Nov 23
Multiple Airlines Logo
11:30 pm - 8:25 pm
ORD
-
USM
31h 55m
2 stops
Multiple Airlines Logo
7:00 am - 7:35 pm
USM
-
ORD
25h 35m
2 stops
$1,223Multiple Airlines
Tue, Nov 24 - Tue, Dec 8
EVA Air Logo
12:30 am - 5:05 pm
ORD
-
USM
28h 35m
2 stops
EVA Air Logo
7:50 am - 8:45 pm
USM
-
ORD
24h 55m
2 stops
$1,286EVA Air
Wed, Sep 16 - Mon, Sep 21
Multiple Airlines Logo
12:30 am - 7:30 am
ORD
-
USM
43h 00m
2 stops
Multiple Airlines Logo
8:45 am - 9:10 pm
USM
-
ORD
24h 25m
2 stops
$1,473Multiple Airlines
Wed, Jul 1 - Thu, Jul 9
EVA Air Logo
12:30 am - 3:25 pm
ORD
-
USM
26h 55m
2 stops
EVA Air Logo
8:45 am - 9:10 pm
USM
-
ORD
24h 25m
2 stops
$1,521EVA Air
Wed, Jul 1 - Thu, Jul 9
Etihad Airways Logo
2:00 pm - 7:30 am
ORD
-
USM
29h 30m
2 stops
Etihad Airways Logo
7:45 pm - 3:40 pm
USM
-
ORD
31h 55m
2 stops
$1,584Etihad Airways
Wed, Jul 1 - Mon, Jul 6
Multiple Airlines Logo
12:30 am - 2:45 pm
ORD
-
USM
26h 15m
2 stops
Multiple Airlines Logo
6:15 pm - 7:48 pm
USM
-
ORD
37h 33m
3 stops
$1,617Multiple Airlines
Thu, Sep 17 - Fri, Sep 25
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
$1,632Cathay Pacific
Thu, Sep 17 - Mon, Sep 21
Multiple Airlines Logo
5:35 pm - 8:10 am
ORD
-
USM
25h 35m
2 stops
Multiple Airlines Logo
5:05 pm - 2:41 pm
USM
-
ORD
34h 36m
3 stops
$1,655Multiple Airlines
Mon, Nov 16 - Mon, Nov 23

EVA Air flights from Illinois to Ko Samui

Our best EVA Air deals on Illinois to Ko Samui flight tickets
EVA Air
Sep 16
ORD12:30 amChicago O'Hare Intl
28h 35m
2 stops
USM5:05 pmKo Samui
Sep 21
USM7:50 amKo Samui
24h 55m
2 stops
ORD8:45 pmChicago O'Hare Intl
$1,286
EVA Air
Jul 1
ORD12:30 amChicago O'Hare Intl
26h 55m
2 stops
USM3:25 pmKo Samui
Jul 9
USM8:45 amKo Samui
24h 25m
2 stops
ORD9:10 pmChicago O'Hare Intl
$1,521
EVA Air
Jun 21
ORD12:30 amChicago O'Hare Intl
26h 15m
2 stops
USM2:45 pmKo Samui
Jun 30
USM7:10 pmKo Samui
38h 00m
2 stops
ORD9:10 pmChicago O'Hare Intl
$1,864

Etihad Airways flights from Illinois to Ko Samui

Our best Etihad Airways deals on Illinois to Ko Samui flight tickets
Etihad Airways
Jul 1
ORD2:00 pmChicago O'Hare Intl
29h 30m
2 stops
USM7:30 amKo Samui
Jul 6
USM7:45 pmKo Samui
31h 55m
2 stops
ORD3:40 pmChicago O'Hare Intl
$1,584
Etihad Airways
Jun 24
ORD8:25 pmChicago O'Hare Intl
33h 50m
2 stops
USM6:15 pmKo Samui
Jun 29
USM8:00 amKo Samui
36h 35m
2 stops
ORD8:35 amChicago O'Hare Intl
$1,669
Etihad Airways
Jun 24
ORD8:25 pmChicago O'Hare Intl
33h 50m
2 stops
USM6:15 pmKo Samui
Jun 27
USM3:25 pmKo Samui
36h 15m
2 stops
ORD3:40 pmChicago O'Hare Intl
$1,709

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 June 2, 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 9/18

2:00 pm-7:10 am

2 stops29h 10m

Ko Samui

Fri 9/25

7:00 pm-3:40 pm

2 stops32h 40m

$1,067

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 11/16

8:20 pm-10:40 am

2 stops25h 20m

Ko Samui

Mon 11/23

6:15 pm-3:00 pm

2 stops33h 45m

$1,118

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 11/24

11:30 pm-8:25 pm

2 stops31h 55m

Ko Samui

Tue 12/8

7:00 am-7:35 pm

2 stops25h 35m

$1,223

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 9/16

12:30 am-5:05 pm

2 stops28h 35m

Ko Samui

Mon 9/21

7:50 am-8:45 pm

2 stops24h 55m

$1,286

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 7/1

12:30 am-7:30 am

2 stops43h 00m

Ko Samui

Thu 7/9

8:45 am-9:10 pm

2 stops24h 25m

$1,473
Quickest round-trip

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 7/1

12:30 am-3:25 pm

2 stops26h 55m

Ko Samui

Thu 7/9

8:45 am-9:10 pm

2 stops24h 25m

$1,521

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 7/1

2:00 pm-7:30 am

2 stops29h 30m

Ko Samui

Mon 7/6

7:45 pm-3:40 pm

2 stops31h 55m

$1,584

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 9/17

12:30 am-2:45 pm

2 stops26h 15m

Ko Samui

Fri 9/25

6:15 pm-7:48 pm

3 stops37h 33m

$1,617

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 9/17

4:15 pm-7:40 pm

1 stop39h 25m

Ko Samui

Mon 9/21

11:55 am-1:55 pm

1 stop38h 00m

$1,632

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 11/16

5:35 pm-8:10 am

2 stops25h 35m

Ko Samui

Mon 11/23

5:05 pm-2:41 pm

3 stops34h 36m

$1,655

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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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?

Etihad Airways and Qatar Airways are the most popular carriers 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

26h 25m

Direct flights

None
The fastest flight from Illinois to Ko Samui takes 26h 25m
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.

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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