How often are flights from Chicago to Ko Samui delayed?

Historically, on average around 20% 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 131 minutes.

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

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

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

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

What is the cheapest airline that flies from Chicago to Ko Samui?

EVA Air is the most popular carrier operating from Chicago to Ko Samui

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 in the early afternoon have, in the past, seen delays more frequently in comparison.

When did momondo last update prices for flights from Chicago to Ko Samui Airport?

Prices for flights from Chicago to Ko Samui Airport were last updated today.

How many operators does momondo search for flights from Chicago to Ko Samui Airport?

As of February 2026, there is 1 operator available to choose from for flights from Chicago to Ko Samui Airport.

How old do you have to be to fly from Chicago to Ko Samui Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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.

$66 Cheap Flights from Chicago to Ko Samui in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

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

Trusted and free

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

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Chicago to Ko Samui

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:30 am - 1:45 pm

ORD

USM

25h 15m

2 stops

9:00 pm - 9:00 pm

USM

ORD

36h 00m

2 stops

$1,042EVA Air

Mon, Apr 13 - Tue, Apr 21

9:20 pm - 6:25 pm

ORD

USM

33h 05m

2 stops

7:00 pm - 11:05 am

USM

ORD

28h 05m

2 stops

$1,077Multiple Airlines

Sun, Mar 8 - Wed, Mar 18

12:30 am - 3:35 pm

ORD

USM

27h 05m

2 stops

8:30 am - 8:35 pm

USM

ORD

24h 05m

2 stops

$1,079EVA Air

Mon, Mar 9 - Mon, Mar 23

12:50 pm - 10:40 am

ORD

USM

33h 50m

2 stops

7:00 pm - 11:05 am

USM

ORD

28h 05m

2 stops

$1,081Multiple Airlines

Sun, Mar 8 - Wed, Mar 18

8:20 pm - 6:15 pm

ORD

USM

32h 55m

2 stops

4:25 pm - 11:05 am

USM

ORD

30h 40m

2 stops

$1,101Multiple Airlines

Mon, Mar 2 - Mon, Mar 9

11:30 pm - 6:55 pm

ORD

USM

30h 25m

2 stops

7:35 pm - 8:35 pm

USM

ORD

37h 00m

2 stops

$1,110EVA Air

Mon, Mar 2 - Mon, Mar 9

12:30 am - 3:35 pm

ORD

USM

27h 05m

2 stops

8:35 pm - 9:00 pm

USM

ORD

36h 25m

2 stops

$1,136EVA Air

Mon, Mar 9 - Tue, Apr 7

12:50 pm - 6:25 pm

ORD

USM

41h 35m

2 stops

9:10 pm - 7:25 pm

USM

ORD

34h 15m

2 stops

$1,140Multiple Airlines

Wed, Mar 18 - Wed, Mar 25

12:30 am - 3:35 pm

ORD

USM

27h 05m

2 stops

9:00 pm - 9:00 pm

USM

ORD

36h 00m

2 stops

$1,193EVA Air

Mon, Mar 9 - Tue, Apr 7

1:10 pm - 7:45 am

ORD

USM

29h 35m

2 stops

5:40 pm - 7:35 am

USM

ORD

26h 55m

2 stops

$1,310Etihad Airways

Wed, Feb 18 - Wed, Feb 25

Qatar Airways flights from Chicago to Ko Samui

Our best Qatar Airways deals on Chicago to Ko Samui flight tickets

Qatar Airways

Mar 13

ORD4:05 pmChicago O'Hare Intl

36h 20m

3 stops

USM4:25 pmKo Samui

Mar 16

USM7:35 pmKo Samui

32h 10m

2 stops

ORD3:45 pmChicago O'Hare Intl

$2,019

Qatar Airways

Feb 21

ORD11:45 amChicago O'Hare Intl

32h 35m

3 stops

USM9:20 amKo Samui

Feb 28

USM7:30 pmKo Samui

32h 00m

2 stops

ORD2:30 pmChicago O'Hare Intl

$2,297

Cathay Pacific flights from Chicago to Ko Samui

Our best Cathay Pacific deals on Chicago to Ko Samui flight tickets

Cathay Pacific

Mar 18

ORD3:35 pmChicago O'Hare Intl

40h 00m

1 stop

USM7:35 pmKo Samui

Mar 25

USM11:40 amKo Samui

38h 15m

1 stop

ORD1:55 pmChicago O'Hare Intl

$1,714

Cathay Pacific

Mar 8

ORD3:35 pmChicago O'Hare Intl

40h 00m

1 stop

USM7:35 pmKo Samui

Mar 18

USM11:40 amKo Samui

38h 15m

1 stop

ORD1:55 pmChicago O'Hare Intl

$1,715

Cathay Pacific

Mar 8

ORD3:35 pmChicago O'Hare Intl

40h 00m

1 stop

USM7:35 pmKo Samui

Mar 18

USM11:40 amKo Samui

38h 15m

1 stop

ORD1:55 pmChicago O'Hare Intl

$1,764

Fly from

Fly to

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 4/13

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Tue 4/21

9:00 pm-9:00 pm

2 stops36h 00m

$1,042

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

9:20 pm-6:25 pm

2 stops33h 05m

Ko Samui

Wed 3/18

7:00 pm-11:05 am

2 stops28h 05m

$1,077

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/9

12:30 am-3:35 pm

2 stops27h 05m

Ko Samui

Mon 3/23

8:30 am-8:35 pm

2 stops24h 05m

$1,079

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

12:50 pm-10:40 am

2 stops33h 50m

Ko Samui

Wed 3/18

7:00 pm-11:05 am

2 stops28h 05m

$1,081

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/2

8:20 pm-6:15 pm

2 stops32h 55m

Ko Samui

Mon 3/9

4:25 pm-11:05 am

2 stops30h 40m

$1,101

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/2

11:30 pm-6:55 pm

2 stops30h 25m

Ko Samui

Mon 3/9

7:35 pm-8:35 pm

2 stops37h 00m

$1,110

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/9

12:30 am-3:35 pm

2 stops27h 05m

Ko Samui

Tue 4/7

8:35 pm-9:00 pm

2 stops36h 25m

$1,136

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 3/18

12:50 pm-6:25 pm

2 stops41h 35m

Ko Samui

Wed 3/25

9:10 pm-7:25 pm

2 stops34h 15m

$1,140

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/9

12:30 am-3:35 pm

2 stops27h 05m

Ko Samui

Tue 4/7

9:00 pm-9:00 pm

2 stops36h 00m

$1,193

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 2/18

1:10 pm-7:45 am

2 stops29h 35m

Ko Samui

Wed 2/25

5:40 pm-7:35 am

2 stops26h 55m

$1,310

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Chicago 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

Prices

Airlines

Delays

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 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 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 to Ko Samui

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Ko Samui according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Chicago to Ko Samui (CHI to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Ko Samui

Fastest flight time	29h 00m
Direct flights	None

The fastest flight from Chicago to Ko Samui takes 29h 00m

There are no direct flights from Chicago to Ko Samui. There are no popular flight routes from Chicago to Ko Samui.

Search flight deals

How far is Chicago to Ko Samui by plane?
There are 8846.2 mi between Chicago and Ko Samui. 29h 00m is a normal flight duration for this route.
When did momondo last update prices for flights from Chicago to Ko Samui Airport?
Prices for flights from Chicago to Ko Samui Airport were last updated today.
How many operators does momondo search for flights from Chicago to Ko Samui Airport?
As of February 2026, there is 1 operator available to choose from for flights from Chicago to Ko Samui Airport.
How old do you have to be to fly from Chicago to Ko Samui Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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 to Ko Samui?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Chicago to Ko Samui is EVA Air (100% of total bookings).

Best airlines flying from Chicago to Ko Samui

Compare and see reviews for airlines that fly from Chicago to Ko Samui with momondo

Airline	Rating	Free Cancellation	Price
EVA Air	PriceFrom $1,098	Free Cancellation	Rating 8.4 1,340 reviews		Search EVA Air flights

Ko Tao

Ko Pha Ngan

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. momondo enables you to select and highlight flights to Ko Samui from Chicago with this policy.

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?

Yes momondo offers price alerts on flights to Ko Samui from Chicago. 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.