How often are flights from Chicago to Ko Samui delayed?

Historically, on average around 17% 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 135 minutes.

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

What is the cheapest airline that flies from Chicago O'Hare Intl to Ko Samui?

EVA Air is the most popular carrier operating from Chicago O'Hare Intl to Ko Samui

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

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

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.

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?

As of December 2025, there is 1 operator available to choose from 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.

$82 Cheap Flights from Chicago O'Hare Intl Airport to Ko Samui in 2025/26

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Find the cheapest flights from Chicago O'Hare Intl Airport to Ko Samui

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

12:30 am - 3:35 pm

ORD

USM

27h 05m2 stops

8:35 pm - 9:00 pm

USM

ORD

36h 25m2 stops

$1,050EVA Air

Mon, Mar 9 - Tue, Apr 7

11:30 pm - 7:45 am

ORD

USM

43h 15m2 stops

7:35 pm - 7:35 pm

USM

ORD

37h 00m2 stops

$1,053EVA Air

Tue, Jan 13 - Wed, Jan 21

11:30 pm - 8:40 am

ORD

USM

44h 10m2 stops

7:55 am - 7:35 pm

USM

ORD

24h 40m2 stops

$1,098EVA Air

Thu, Feb 5 - Thu, Feb 12

12:50 pm - 7:45 am

ORD

USM

30h 55m2 stops

6:40 pm - 11:05 am

USM

ORD

28h 25m2 stops

$1,104Multiple Airlines

Sun, Mar 8 - Wed, Mar 18

11:30 pm - 9:20 pm

ORD

USM

32h 50m2 stops

9:10 pm - 7:35 pm

USM

ORD

35h 25m2 stops

$1,153EVA Air

Thu, Jan 15 - Wed, Jan 21

11:30 pm - 5:50 pm

ORD

USM

29h 20m2 stops

9:10 pm - 7:35 pm

USM

ORD

35h 25m2 stops

$1,173EVA Air

Tue, Jan 13 - Tue, Jan 20

11:30 pm - 5:50 pm

ORD

USM

29h 20m2 stops

9:10 pm - 7:35 pm

USM

ORD

35h 25m2 stops

$1,178EVA Air

Tue, Jan 13 - Mon, Jan 19

11:30 pm - 7:50 pm

ORD

USM

31h 20m2 stops

9:10 pm - 7:35 pm

USM

ORD

35h 25m2 stops

$1,213EVA Air

Wed, Jan 14 - Wed, Jan 21

11:30 pm - 7:50 pm

ORD

USM

31h 20m2 stops

7:10 pm - 7:35 pm

USM

ORD

37h 25m2 stops

$1,230EVA Air

Wed, Jan 14 - Tue, Jan 20

11:30 pm - 7:50 pm

ORD

USM

31h 20m2 stops

7:55 am - 7:35 pm

USM

ORD

24h 40m2 stops

$1,292EVA Air

Wed, Jan 14 - Mon, Jan 19

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

Feb 3

ORD11:30 pmChicago O'Hare Intl

28h 10m

2 stops

USM4:40 pmKo Samui

Feb 10

USM7:55 amKo Samui

48h 40m

2 stops

ORD7:35 pmChicago O'Hare Intl

$1,047

Find similar

EVA Air

Mar 9

ORD12:30 amChicago O'Hare Intl

27h 05m

2 stops

USM3:35 pmKo Samui

Apr 7

USM8:35 pmKo Samui

36h 25m

2 stops

ORD9:00 pmChicago O'Hare Intl

$1,050

Find similar

EVA Air

Jan 13

ORD11:30 pmChicago O'Hare Intl

43h 15m

2 stops

USM7:45 amKo Samui

Jan 21

USM7:35 pmKo Samui

37h 00m

2 stops

ORD7:35 pmChicago O'Hare Intl

$1,053

Find similar

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

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

$1,397

Find similar

Cathay Pacific

Feb 3

ORD2:35 pmChicago O'Hare Intl

40h 00m

1 stop

USM7:35 pmKo Samui

Feb 10

USM11:40 amKo Samui

38h 15m

1 stop

ORD12:55 pmChicago O'Hare Intl

$1,508

Find similar

Cathay Pacific

Feb 5

ORD2:35 pmChicago O'Hare Intl

40h 00m

1 stop

USM7:35 pmKo Samui

Feb 12

USM11:40 amKo Samui

38h 15m

1 stop

ORD12:55 pmChicago O'Hare Intl

$1,558

Find similar

momondo Fare Finder

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

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

$1,050

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 1/13

11:30 pm-7:45 am

2 stops43h 15m

Ko Samui

Wed 1/21

7:35 pm-7:35 pm

2 stops37h 00m

$1,053

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 2/5

11:30 pm-8:40 am

2 stops44h 10m

Ko Samui

Thu 2/12

7:55 am-7:35 pm

2 stops24h 40m

$1,098

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sun 3/8

12:50 pm-7:45 am

2 stops30h 55m

Ko Samui

Wed 3/18

6:40 pm-11:05 am

2 stops28h 25m

$1,104

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 1/15

11:30 pm-9:20 pm

2 stops32h 50m

Ko Samui

Wed 1/21

9:10 pm-7:35 pm

2 stops35h 25m

$1,153

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 1/13

11:30 pm-5:50 pm

2 stops29h 20m

Ko Samui

Tue 1/20

9:10 pm-7:35 pm

2 stops35h 25m

$1,173

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 1/13

11:30 pm-5:50 pm

2 stops29h 20m

Ko Samui

Mon 1/19

9:10 pm-7:35 pm

2 stops35h 25m

$1,178

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 1/14

11:30 pm-7:50 pm

2 stops31h 20m

Ko Samui

Wed 1/21

9:10 pm-7:35 pm

2 stops35h 25m

$1,213

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 1/14

11:30 pm-7:50 pm

2 stops31h 20m

Ko Samui

Tue 1/20

7:10 pm-7:35 pm

2 stops37h 25m

$1,230

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 1/14

11:30 pm-7:50 pm

2 stops31h 20m

Ko Samui

Mon 1/19

7:55 am-7:35 pm

2 stops24h 40m

$1,292

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first

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

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 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

Fastest flight time	26h 35m
Direct flights	None

The fastest flight from Chicago O'Hare Intl Airport to Ko Samui takes 26h 35m

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

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 26h 35m 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?
As of December 2025, there is 1 operator available to choose from 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?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and Ko Samui, the leading airline is EVA Air, making up 100% of the total bookings.

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 Air	PriceFrom $1,103	Free Cancellation	Rating 8.4 1,298 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. 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

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Cheap flights from Chicago O'Hare Intl Airport to Ko Samui from $739

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Find the cheapest flights from Chicago O'Hare Intl Airport to Ko Samui

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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

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

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Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Ko Samui that are best for you.

See travel insights to Ko Samui from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport 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?

What is the cheapest airline that flies from Chicago O'Hare Intl to Ko Samui?

EVA Air is the most popular carrier operating from Chicago O'Hare Intl to Ko Samui

How often are flights from Chicago to Ko Samui delayed?

Historically, on average around 17% 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 135 minutes.

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

Generally, flights departing at night 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. 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, 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.

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

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

Direct flights

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

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

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?

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

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

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