Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Chicago O'Hare Intl Airport to Ko Samui from $547

This is the cheapest one-way 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 1/9. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Chicago O'Hare Intl Airport to Ko Samui (ORD-USM)

Cheap round-trip flights

Logo
1:05 am - 5:45 pmORD-USM
28h 40m2 stops
Logo
7:10 pm - 3:45 pmUSM-ORD
32h 35m2 stops
$947
Find Deal
Tue, Sep 16 - Wed, Sep 24
Logo
5:30 pm - 7:30 amORD-USM
25h 00m2 stops
Logo
5:40 pm - 1:35 pmUSM-ORD
32h 55m2 stops
$951
Find Deal
Sun, Nov 9 - Wed, Nov 19
Turkish Airlines Logo
7:50 pm - 8:15 amORD-USM
24h 25m2 stops
Turkish Airlines Logo
4:25 pm - 9:40 amUSM-ORD
29h 15m2 stops
$1,102Turkish Airlines
Find Deal
Sun, Sep 28 - Thu, Oct 2
EVA Air Logo
12:30 am - 8:30 pmORD-USM
32h 00m2 stops
EVA Air Logo
8:00 am - 8:45 pmUSM-ORD
24h 45m2 stops
$1,108EVA Air
Find Deal
Wed, Sep 3 - Wed, Sep 17
EVA Air Logo
12:30 am - 9:35 pmORD-USM
33h 05m2 stops
EVA Air Logo
8:00 am - 8:45 pmUSM-ORD
24h 45m2 stops
$1,146EVA Air
Find Deal
Thu, Sep 4 - Wed, Sep 17
Turkish Airlines Logo
11:25 am - 8:15 amORD-USM
32h 50m2 stops
Turkish Airlines Logo
4:25 pm - 9:40 amUSM-ORD
29h 15m2 stops
$1,304Turkish Airlines
Find Deal
Sun, Sep 28 - Thu, Oct 2
Qatar Airways Logo
7:20 pm - 10:30 amORD-USM
27h 10m2 stops
Qatar Airways Logo
5:55 pm - 3:05 pmUSM-ORD
33h 10m2 stops
$1,326Qatar Airways
Find Deal
Thu, Sep 4 - Wed, Sep 17
Etihad Airways Logo
1:55 pm - 8:25 pmORD-USM
42h 30m2 stops
Etihad Airways Logo
5:25 pm - 8:45 amUSM-ORD
27h 20m2 stops
$1,347Etihad Airways
Find Deal
Fri, Sep 5 - Wed, Sep 17
Etihad Airways Logo
1:55 pm - 8:15 amORD-USM
30h 20m2 stops
Etihad Airways Logo
7:00 pm - 8:45 amUSM-ORD
49h 45m2 stops
$1,501Etihad Airways
Find Deal
Fri, Aug 29 - Sat, Sep 6
Qatar Airways Logo
7:20 pm - 10:30 amORD-USM
27h 10m2 stops
Qatar Airways Logo
8:50 pm - 2:50 pmUSM-ORD
30h 00m2 stops
$1,724Qatar Airways
Find Deal
Wed, Aug 27 - Tue, Sep 2

Etihad Airways flights from Chicago O'Hare Intl Airport to Ko Samui

Our best Etihad Airways deals on Chicago O'Hare Intl Airport to Ko Samui flight tickets
Etihad Airways
Sep 5
ORD1:55 pmChicago O'Hare Intl
42h 30m
2 stops
USM8:25 pmKo Samui
Sep 17
USM5:25 pmKo Samui
27h 20m
2 stops
ORD8:45 amChicago O'Hare Intl
$1,347
Find similar
Etihad Airways
Aug 29
ORD1:55 pmChicago O'Hare Intl
30h 20m
2 stops
USM8:15 amKo Samui
Sep 6
USM7:00 pmKo Samui
49h 45m
2 stops
ORD8:45 amChicago O'Hare Intl
$1,501
Find similar

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
Sep 3
ORD12:30 amChicago O'Hare Intl
32h 00m
2 stops
USM8:30 pmKo Samui
Sep 17
USM8:00 amKo Samui
24h 45m
2 stops
ORD8:45 pmChicago O'Hare Intl
$1,108
Find similar
EVA Air
Sep 4
ORD12:30 amChicago O'Hare Intl
33h 05m
2 stops
USM9:35 pmKo Samui
Sep 17
USM8:00 amKo Samui
24h 45m
2 stops
ORD8:45 pmChicago O'Hare Intl
$1,146
Find similar
EVA Air
Aug 24
ORD12:30 amChicago O'Hare Intl
28h 05m
2 stops
USM4:35 pmKo Samui
Sep 1
USM8:45 amKo Samui
24h 00m
2 stops
ORD8:45 pmChicago O'Hare Intl
$1,168
Find similar

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 August 4, 2025.
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

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 9/16

1:05 am-5:45 pm

2 stops28h 40m

Ko Samui

Wed 9/24

7:10 pm-3:45 pm

2 stops32h 35m

$947

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 11/9

5:30 pm-7:30 am

2 stops25h 00m

Ko Samui

Wed 11/19

5:40 pm-1:35 pm

2 stops32h 55m

$951

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 9/28

7:50 pm-8:15 am

2 stops24h 25m

Ko Samui

Thu 10/2

4:25 pm-9:40 am

2 stops29h 15m

$1,102

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 9/3

12:30 am-8:30 pm

2 stops32h 00m

Ko Samui

Wed 9/17

8:00 am-8:45 pm

2 stops24h 45m

$1,108

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 9/4

12:30 am-9:35 pm

2 stops33h 05m

Ko Samui

Wed 9/17

8:00 am-8:45 pm

2 stops24h 45m

$1,146

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 9/28

11:25 am-8:15 am

2 stops32h 50m

Ko Samui

Thu 10/2

4:25 pm-9:40 am

2 stops29h 15m

$1,304

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 9/4

7:20 pm-10:30 am

2 stops27h 10m

Ko Samui

Wed 9/17

5:55 pm-3:05 pm

2 stops33h 10m

$1,326

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 9/5

1:55 pm-8:25 pm

2 stops42h 30m

Ko Samui

Wed 9/17

5:25 pm-8:45 am

2 stops27h 20m

$1,347

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 8/29

1:55 pm-8:15 am

2 stops30h 20m

Ko Samui

Sat 9/6

7:00 pm-8:45 am

2 stops49h 45m

$1,501

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 8/27

7:20 pm-10:30 am

2 stops27h 10m

Ko Samui

Tue 9/2

8:50 pm-2:50 pm

2 stops30h 00m

$1,724

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

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 Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport 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.

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

Best Price Found

$547

Fastest flight time

24h 25m

Direct flights

None

Airports in Ko Samui

1 airport
The best one-way flight to Ko Samui from Chicago O'Hare Intl Airport in the past 72 hours is $547. The best round-trip flight deal from Chicago O'Hare Intl Airport to Ko Samui found on momondo in the last 72 hours is $947.
The fastest flight from Chicago O'Hare Intl Airport to Ko Samui takes 24h 25m
There are no direct flights from Chicago O'Hare Intl Airport to Ko Samui. Popular non-direct route for this connection is Chicago O'Hare Intl Airport - Ko Samui Airport.
There is 1 airport near Ko Samui: Ko Samui (USM)
Search flight deals

  • 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 24h 25m 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 many operators does momondo search for flights from Chicago O'Hare Intl Airport to Ko Samui Airport?

  • 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.

  • What is the most popular airline from Chicago O'Hare Intl Airport to Ko Samui?

Best airlines flying from Chicago O'Hare Intl Airport to Ko Samui

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Ko Samui with momondo
Airline
Rating
Free Cancellation
Price
EVA AirPriceFrom $1,117Free CancellationRating
8.4
1,224 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 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.

An easier way to manage your Ko Samui trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 8/9
Sat 8/16
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Thailand