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Cheap flights from Chicago O'Hare Intl Airport to Ko Samui from $1,063

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Ko Samui departing on 9/18. 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 Chicago O'Hare Intl Airport to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:00 pm - 8:25 am
ORD
-
USM
30h 25m
2 stops
Multiple Airlines Logo
7:00 pm - 3:40 pm
USM
-
ORD
32h 40m
2 stops
$1,063Multiple Airlines
Fri, Sep 18 - Fri, Sep 25
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
$1,120Multiple Airlines
Fri, Sep 4 - Sat, Sep 12
Multiple Airlines Logo
9:10 pm - 9:20 am
ORD
-
USM
48h 10m
2 stops
Multiple Airlines Logo
8:50 pm - 3:40 pm
USM
-
ORD
30h 50m
2 stops
$1,143Multiple Airlines
Fri, Oct 16 - Fri, Oct 23
Multiple Airlines Logo
1:10 pm - 10:40 am
ORD
-
USM
32h 30m
2 stops
Multiple Airlines Logo
7:00 am - 7:55 am
USM
-
ORD
37h 55m
2 stops
$1,216Multiple Airlines
Tue, Nov 24 - Tue, Dec 8
EVA Air Logo
11:30 pm - 5:00 pm
ORD
-
USM
28h 30m
2 stops
EVA Air Logo
7:00 am - 7:35 pm
USM
-
ORD
25h 35m
2 stops
$1,217EVA Air
Tue, Nov 24 - Tue, Dec 8
EVA Air Logo
12:30 am - 5:05 pm
ORD
-
USM
28h 35m
2 stops
EVA Air Logo
9:00 pm - 8:45 pm
USM
-
ORD
35h 45m
2 stops
$1,315EVA Air
Fri, Aug 7 - Sun, Sep 6
EVA Air Logo
11:30 pm - 6:55 pm
ORD
-
USM
30h 25m
2 stops
EVA Air Logo
10:00 am - 7:35 pm
USM
-
ORD
22h 35m
2 stops
$1,320EVA Air
Sun, Nov 8 - Thu, Nov 12
EVA Air Logo
11:30 pm - 3:35 pm
ORD
-
USM
27h 05m
2 stops
EVA Air Logo
7:00 am - 7:35 pm
USM
-
ORD
25h 35m
2 stops
$1,326EVA Air
Sun, Nov 8 - Thu, Nov 12
EVA Air Logo
12:30 am - 5:05 pm
ORD
-
USM
28h 35m
2 stops
EVA Air Logo
9:00 pm - 8:45 pm
USM
-
ORD
35h 45m
2 stops
$1,339EVA Air
Sat, Aug 8 - Sun, Sep 6
EVA Air Logo
12:30 am - 7:00 pm
ORD
-
USM
30h 30m
2 stops
EVA Air Logo
8:45 am - 8:45 pm
USM
-
ORD
24h 00m
2 stops
$1,340EVA Air
Wed, Aug 5 - Wed, Sep 9

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EVA Air flights from Chicago O'Hare Intl Airport to Ko Samui

Our best EVA Air deals on Chicago O'Hare Intl Airport to Ko Samui flight tickets
EVA Air
Nov 24
ORD11:30 pmChicago O'Hare Intl
28h 30m
2 stops
USM5:00 pmKo Samui
Dec 8
USM7:00 amKo Samui
25h 35m
2 stops
ORD7:35 pmChicago O'Hare Intl
$1,217
EVA Air
Aug 7
ORD12:30 amChicago O'Hare Intl
28h 35m
2 stops
USM5:05 pmKo Samui
Sep 6
USM9:00 pmKo Samui
35h 45m
2 stops
ORD8:45 pmChicago O'Hare Intl
$1,315
EVA Air
Nov 8
ORD11:30 pmChicago O'Hare Intl
30h 25m
2 stops
USM6:55 pmKo Samui
Nov 12
USM10:00 amKo Samui
22h 35m
2 stops
ORD7:35 pmChicago O'Hare Intl
$1,320

Cathay Pacific flights from Chicago O'Hare Intl Airport to Ko Samui

Our best Cathay Pacific deals on Chicago O'Hare Intl Airport to Ko Samui flight tickets
Cathay Pacific
Sep 4
ORD4:00 pmChicago O'Hare Intl
39h 40m
1 stop
USM7:40 pmKo Samui
Sep 12
USM11:55 amKo Samui
38h 25m
1 stop
ORD2:20 pmChicago O'Hare Intl
$1,631
Cathay Pacific
Sep 4
ORD4:00 pmChicago O'Hare Intl
39h 40m
1 stop
USM7:40 pmKo Samui
Sep 12
USM11:55 amKo Samui
38h 25m
1 stop
ORD2:20 pmChicago O'Hare Intl
$1,636
Cathay Pacific
Sep 18
ORD4:15 pmChicago O'Hare Intl
39h 25m
1 stop
USM7:40 pmKo Samui
Sep 25
USM11:55 amKo Samui
38h 00m
1 stop
ORD1:55 pmChicago O'Hare Intl
$1,691

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport 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 14, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport 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-8:25 am

2 stops30h 25m

Ko Samui

Fri 9/25

7:00 pm-3:40 pm

2 stops32h 40m

$1,063

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 9/4

2:00 pm-7:10 am

2 stops29h 10m

Ko Samui

Sat 9/12

7:00 pm-3:40 pm

2 stops32h 40m

$1,120

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 10/16

9:10 pm-9:20 am

2 stops48h 10m

Ko Samui

Fri 10/23

8:50 pm-3:40 pm

2 stops30h 50m

$1,143

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 11/24

1:10 pm-10:40 am

2 stops32h 30m

Ko Samui

Tue 12/8

7:00 am-7:55 am

2 stops37h 55m

$1,216

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 11/24

11:30 pm-5:00 pm

2 stops28h 30m

Ko Samui

Tue 12/8

7:00 am-7:35 pm

2 stops25h 35m

$1,217

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 8/7

12:30 am-5:05 pm

2 stops28h 35m

Ko Samui

Sun 9/6

9:00 pm-8:45 pm

2 stops35h 45m

$1,315

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 11/8

11:30 pm-6:55 pm

2 stops30h 25m

Ko Samui

Thu 11/12

10:00 am-7:35 pm

2 stops22h 35m

$1,320
Quickest round-trip

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 11/8

11:30 pm-3:35 pm

2 stops27h 05m

Ko Samui

Thu 11/12

7:00 am-7:35 pm

2 stops25h 35m

$1,326

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 8/8

12:30 am-5:05 pm

2 stops28h 35m

Ko Samui

Sun 9/6

9:00 pm-8:45 pm

2 stops35h 45m

$1,339

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 8/5

12:30 am-7:00 pm

2 stops30h 30m

Ko Samui

Wed 9/9

8:45 am-8:45 pm

2 stops24h 00m

$1,340

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 Chicago O'Hare Intl Airport 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

How often are flights from Chicago to Ko Samui delayed?

Historically, on average around 22% of flights between Chicago and Ko Samui have experienced a delay on any given week. The average delay length over the past 12 months has been 134 minutes.

What is the most punctual flight time for Chicago to Ko Samui flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Chicago to Ko Samui flights?

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 17% of their flights experiencing any sort of delay.

When to book flights from Chicago O'Hare Intl Airport to Ko Samui

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to Ko Samui according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to Ko Samui (ORD to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Ko Samui

Fastest flight time

28h 30m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Ko Samui takes 28h 30m
There are no direct flights from Chicago O'Hare Intl Airport to Ko Samui. There are no popular flight routes from Chicago O'Hare Intl Airport to Ko Samui.
Search flight deals

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Ko Samui

  • How far is Chicago O'Hare Intl to Ko Samui by plane?

    There are 8836.7 mi between Chicago O'Hare Intl and Ko Samui. Typically, this will take 28h 30m by plane in normal conditions.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Ko Samui Airport?

    Prices for flights from Chicago O'Hare Intl Airport to Ko Samui Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport 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 Chicago to Ko Samui?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Ko Samui. momondo saves you time and could save you money on your trip.

Can I find flights from Chicago to Ko Samui with flexible booking policies on momondo?

Yes. All flights to Ko Samui from Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Chicago to Ko Samui?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ko Samui from Chicago.

I’m not ready to book a flight from Chicago to Ko Samui right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Chicago to Ko Samui now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ko Samui and let you know when they change.

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