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.

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

Singapore Airlines is the most popular carrier operating from Chicago to Ko Samui

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

According to our data, Atlas Air have had the least number of delays on this route over the last 12 months; with no flights being classified as delayed.

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

Tuesday 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.

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 120 minutes.

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 November 2025, 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 2025/26

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12:50 pm - 8:25 pmORD-USM

43h 35m2 stops

7:00 am - 7:25 pmUSM-ORD

48h 25m2 stops

$943Multiple Airlines

Find Deal

Sun, Mar 8 - Wed, Mar 18

12:50 pm - 8:05 amORD-USM

31h 15m2 stops

7:00 am - 11:05 amUSM-ORD

40h 05m2 stops

$1,001Turkish Airlines

Find Deal

Sun, Mar 8 - Wed, Mar 18

12:30 am - 3:40 pmORD-USM

27h 10m2 stops

7:15 pm - 9:00 pmUSM-ORD

37h 45m2 stops

$1,095EVA Air

Find Deal

Mon, Mar 9 - Tue, Apr 7

7:50 pm - 9:10 pmORD-USM

37h 20m2 stops

1:30 pm - 6:15 pmUSM-ORD

40h 45m2 stops

$1,115Turkish Airlines

Find Deal

Tue, Apr 14 - Wed, Apr 22

12:50 pm - 7:45 amORD-USM

30h 55m2 stops

8:20 am - 9:40 amUSM-ORD

37h 20m2 stops

$1,136Multiple Airlines

Find Deal

Tue, Mar 10 - Tue, Apr 7

12:30 am - 1:45 pmORD-USM

25h 15m2 stops

7:15 pm - 9:00 pmUSM-ORD

37h 45m2 stops

$1,142EVA Air

Find Deal

Mon, Apr 13 - Wed, Apr 22

12:30 am - 2:55 pmORD-USM

26h 25m2 stops

7:00 am - 8:35 pmUSM-ORD

25h 35m2 stops

$1,143EVA Air

Find Deal

Sat, Mar 14 - Thu, Mar 19

4:25 pm - 8:25 pmORD-USM

39h 00m2 stops

7:15 am - 7:20 amUSM-ORD

37h 05m2 stops

$1,153Multiple Airlines

Find Deal

Mon, Dec 1 - Tue, Dec 9

10:20 am - 11:00 amORD-USM

35h 40m3 stops

8:30 am - 6:05 amUSM-ORD

34h 35m3 stops

$1,183Multiple Airlines

Find Deal

Mon, Dec 1 - Tue, Dec 9

9:20 pm - 6:15 pmORD-USM

56h 55m2 stops

8:20 am - 9:40 amUSM-ORD

37h 20m2 stops

$1,188Turkish Airlines

Find Deal

Tue, Mar 10 - Tue, Apr 7

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

USM7:15 pmKo Samui

37h 45m

2 stops

ORD9:00 pmChicago O'Hare Intl

$1,095

Find similar

EVA Air

Apr 13

ORD12:30 amChicago O'Hare Intl

25h 15m

2 stops

USM1:45 pmKo Samui

Apr 22

USM7:15 pmKo Samui

37h 45m

2 stops

ORD9:00 pmChicago O'Hare Intl

$1,142

Find similar

EVA Air

Mar 14

ORD12:30 amChicago O'Hare Intl

26h 25m

2 stops

USM2:55 pmKo Samui

Mar 19

USM7:00 amKo Samui

25h 35m

2 stops

ORD8:35 pmChicago O'Hare Intl

$1,143

Find similar

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

$1,396

Find similar

Cathay Pacific

Dec 1

ORD2:35 pmChicago O'Hare Intl

40h 00m

1 stop

USM7:35 pmKo Samui

Dec 9

USM11:40 amKo Samui

38h 15m

1 stop

ORD12:55 pmChicago O'Hare Intl

$1,707

Find similar

Cathay Pacific

Dec 7

ORD2:35 pmChicago O'Hare Intl

40h 00m

1 stop

USM7:35 pmKo Samui

Dec 26

USM8:30 amKo Samui

41h 25m

2 stops

ORD12:55 pmChicago O'Hare Intl

$2,200

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

12:50 pm-8:25 pm

2 stops43h 35m

Ko Samui

Wed 3/18

7:00 am-7:25 pm

2 stops48h 25m

$943

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

12:50 pm-8:05 am

2 stops31h 15m

Ko Samui

Wed 3/18

7:00 am-11:05 am

2 stops40h 05m

$1,001

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

7:15 pm-9:00 pm

2 stops37h 45m

$1,095

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 4/14

7:50 pm-9:10 pm

2 stops37h 20m

Ko Samui

Wed 4/22

1:30 pm-6:15 pm

2 stops40h 45m

$1,115

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 3/10

12:50 pm-7:45 am

2 stops30h 55m

Ko Samui

Tue 4/7

8:20 am-9:40 am

2 stops37h 20m

$1,136

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 4/13

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

Wed 4/22

7:15 pm-9:00 pm

2 stops37h 45m

$1,142

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 3/14

12:30 am-2:55 pm

2 stops26h 25m

Ko Samui

Thu 3/19

7:00 am-8:35 pm

2 stops25h 35m

$1,143

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 12/1

4:25 pm-8:25 pm

2 stops39h 00m

Ko Samui

Tue 12/9

7:15 am-7:20 am

2 stops37h 05m

$1,153

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Mon 12/1

10:20 am-11:00 am

3 stops35h 40m

Ko Samui

Tue 12/9

8:30 am-6:05 am

3 stops34h 35m

$1,183

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 3/10

9:20 pm-6:15 pm

2 stops56h 55m

Ko Samui

Tue 4/7

8:20 am-9:40 am

2 stops37h 20m

$1,188

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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

Direct flights	None

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. 25h 15m 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 November 2025, 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.

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 $1,112	Free Cancellation	Rating 8.4 1,277 reviews		Search EVA Air flights

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. 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 $806

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 12/31. 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

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?

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

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

Singapore Airlines is the most popular carrier operating from Chicago to Ko Samui

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

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

Tuesday 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.

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

According to our data, Atlas Air have had the least number of delays on this route over the last 12 months; with no flights being classified as delayed.

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

Direct flights

How far is Chicago to Ko Samui by plane?

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

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

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

What documentation or ID do you need to fly to Ko Samui Airport?

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