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

According to our data, Southwest have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

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 evening have, in the past, seen delays more frequently in comparison.

How often are flights from Chicago to Ko Samui delayed?

Historically, on average around 15% 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 118 minutes.

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. Sunday has historically seen more delays on average compared to the rest of the week.

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

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Find the cheapest flights from Chicago to Ko Samui

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12:30 am - 3:40 pm

ORD

USM

27h 10m

2 stops

9:00 pm - 9:00 pm

USM

ORD

36h 00m

2 stops

$1,202EVA Air

Mon, Mar 9 - Tue, Apr 7

12:30 am - 4:25 pm

ORD

USM

27h 55m

2 stops

9:00 pm - 9:00 pm

USM

ORD

36h 00m

2 stops

$1,203EVA Air

Mon, Mar 9 - Tue, Apr 7

2:10 pm - 7:45 am

ORD

USM

29h 35m

2 stops

8:50 am - 8:35 am

USM

ORD

59h 45m

2 stops

$1,417Multiple Airlines

Sun, Mar 8 - Wed, Mar 18

8:05 pm - 10:35 am

ORD

USM

26h 30m

2 stops

8:30 pm - 3:45 pm

USM

ORD

31h 15m

2 stops

$1,517Qatar Airways

Sun, Mar 8 - Wed, Mar 18

12:30 am - 2:45 pm

ORD

USM

26h 15m

2 stops

6:00 am - 9:10 pm

USM

ORD

27h 10m

2 stops

$1,543EVA Air

Thu, Jul 2 - Fri, Jul 10

3:35 pm - 7:35 pm

ORD

USM

40h 00m

1 stop

9:00 am - 1:55 pm

USM

ORD

40h 55m

2 stops

$1,546Multiple Airlines

Sun, Mar 8 - Wed, Mar 18

9:20 pm - 6:15 pm

ORD

USM

32h 55m

2 stops

1:25 pm - 11:05 am

USM

ORD

33h 40m

2 stops

$1,564Turkish Airlines

Sun, Mar 8 - Wed, Mar 18

2:00 pm - 8:15 am

ORD

USM

30h 15m

2 stops

5:50 pm - 8:35 am

USM

ORD

26h 45m

2 stops

$1,609Etihad Airways

Wed, Jun 17 - Wed, Jun 24

3:35 pm - 7:35 pm

ORD

USM

40h 00m

1 stop

11:40 am - 1:55 pm

USM

ORD

38h 15m

1 stop

$1,713Cathay Pacific

Sun, Mar 8 - Wed, Mar 18

12:30 am - 2:45 pm

ORD

USM

26h 15m

2 stops

2:00 pm - 5:46 am

USM

ORD

27h 46m

3 stops

$1,830EVA Air

Thu, Jul 2 - Fri, Jul 10

EVA Air flights from Chicago to Ko Samui

Our best EVA Air deals on Chicago to Ko Samui flight tickets

EVA Air

Mar 9

ORD12:30 amChicago O'Hare Intl

27h 10m

2 stops

USM3:40 pmKo Samui

Apr 7

USM9:00 pmKo Samui

36h 00m

2 stops

ORD9:00 pmChicago O'Hare Intl

$1,202

EVA Air

Mar 9

ORD12:30 amChicago O'Hare Intl

27h 55m

2 stops

USM4:25 pmKo Samui

Apr 7

USM9:00 pmKo Samui

36h 00m

2 stops

ORD9:00 pmChicago O'Hare Intl

$1,203

EVA Air

Jul 2

ORD12:30 amChicago O'Hare Intl

26h 15m

2 stops

USM2:45 pmKo Samui

Jul 10

USM6:00 amKo Samui

27h 10m

2 stops

ORD9:10 pmChicago O'Hare Intl

$1,543

Cathay Pacific flights from Chicago to Ko Samui

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

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

$1,713

Cathay Pacific

Jun 17

ORD4:00 pmChicago O'Hare Intl

39h 40m

1 stop

USM7:40 pmKo Samui

Jun 24

USM11:55 amKo Samui

38h 25m

1 stop

ORD2:20 pmChicago O'Hare Intl

$1,945

Cathay Pacific

Jun 17

ORD4:00 pmChicago O'Hare Intl

28h 15m

2 stops

USM8:15 amKo Samui

Jun 24

USM11:55 amKo Samui

38h 25m

1 stop

ORD2:20 pmChicago O'Hare Intl

$1,954

Fly from

Fly to

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/9

12:30 am-3:40 pm

2 stops27h 10m

Ko Samui

Tue 4/7

9:00 pm-9:00 pm

2 stops36h 00m

$1,202

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 3/9

12:30 am-4:25 pm

2 stops27h 55m

Ko Samui

Tue 4/7

9:00 pm-9:00 pm

2 stops36h 00m

$1,203

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

2:10 pm-7:45 am

2 stops29h 35m

Ko Samui

Wed 3/18

8:50 am-8:35 am

2 stops59h 45m

$1,417

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

8:05 pm-10:35 am

2 stops26h 30m

Ko Samui

Wed 3/18

8:30 pm-3:45 pm

2 stops31h 15m

$1,517

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 7/2

12:30 am-2:45 pm

2 stops26h 15m

Ko Samui

Fri 7/10

6:00 am-9:10 pm

2 stops27h 10m

$1,543

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

3:35 pm-7:35 pm

1 stop40h 00m

Ko Samui

Wed 3/18

9:00 am-1:55 pm

2 stops40h 55m

$1,546

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

9:20 pm-6:15 pm

2 stops32h 55m

Ko Samui

Wed 3/18

1:25 pm-11:05 am

2 stops33h 40m

$1,564

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 6/17

2:00 pm-8:15 am

2 stops30h 15m

Ko Samui

Wed 6/24

5:50 pm-8:35 am

2 stops26h 45m

$1,609

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

3:35 pm-7:35 pm

1 stop40h 00m

Ko Samui

Wed 3/18

11:40 am-1:55 pm

1 stop38h 15m

$1,713

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 7/2

12:30 am-2:45 pm

2 stops26h 15m

Ko Samui

Fri 7/10

2:00 pm-5:46 am

3 stops27h 46m

$1,830

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

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 35m
Direct flights	None

The fastest flight from Chicago to Ko Samui takes 29h 35m

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 35m 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 1,353 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.

An easier way to manage your Ko Samui trip

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Cheap flights from Chicago to Ko Samui from $462

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 to Ko Samui departing on 3/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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EVA Air flights from Chicago to Ko Samui

Our best EVA Air deals on Chicago to Ko Samui flight tickets

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

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How to get the cheapest flight ticket from Chicago to Ko Samui

What is the cheapest day to depart on your flight to Ko Samui?

What is the cheapest time of day to depart on your flight to Ko Samui?

How often are flights from Chicago to Ko Samui delayed?

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

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

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

When to book flights from Chicago to Ko Samui

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

Direct flights

Best airlines flying from Chicago to Ko Samui

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

Traveling to a place near Ko Samui?

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Ko Samui?

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

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

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

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Thailand

Airports servicing Thailand

Fly your favorite airline to Ko Samui

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Ko Samui

List of cabin classes available on flights landing in Ko Samui. Availability may vary depending on flight origin and airline.

Popular cities in Thailand

Popular flights according to clicks in the last 7 days on momondo

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