How long is the flight from Chicago O'Hare Intl Airport to Ko Samui?

For as low as $1,174, Cathay Pacific can have you in Ko Samui from Chicago O'Hare Intl Airport in 33h 50m. The distance between Chicago O'Hare Intl Airport and Ko Samui is about 8835 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

In terms of precipitation, rainfall in Ko Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Ko Samui when rainfall is around 2.3 in.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

What is the cheapest time of day to fly from ORD to USM?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago O'Hare Intl Airport to Ko Samui as you normally would.

Most accurate provider : When it comes to deals on Chicago O'Hare Intl Airport-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-Ko Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Ko Samui flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Chicago O'Hare Intl Airport-Ko Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly into for flights to Ko Samui from Chicago O'Hare Intl?

Most people fly into Ko Samui (USM) if they book a flight to Ko Samui from Chicago O'Hare Intl. On average, Ko Samui has 0 inbound flights from Chicago O'Hare Intl per day from 0 airlines. Ko Samui is conveniently located just 2.1 mi from Ko Samui’s city center.

Can I find deals for flights from O'Hare Intl to Ko Samui that include hotel bookings?

Yes. In addition to deals on O'Hare Intl to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from O'Hare Intl to Ko Samui?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Ko Samui.

Can I find deals for business class flights from O'Hare Intl to Ko Samui?

Yes. Cheapflights offers flight deals from O'Hare Intl to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$500+ Cheap Flights from Chicago O'Hare Intl Airport to Ko Samui

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Cheap flight deals from O'Hare Intl to Ko Samui

Cheapest

Best

Last-minute

One-way

Cheapest flights from O'Hare Intl to Ko Samui
Explore the most affordable flight options available from O'Hare Intl to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 24, 2026.

Tue 11/242:10 pm -

1 stop40h 25m

Tue 12/811:40 am -

1 stop37h 50m

Deal found 9/22

$862

Mon 11/22:10 pm -

1 stop40h 25m

Mon 11/1611:40 am -

1 stop37h 50m

Deal found 9/21

$864

Mon 11/22:10 pm -

2 stops28h 00m

Mon 11/169:10 pm -

2 stops28h 20m

Deal found 9/21

$873

Wed 11/42:10 pm -

1 stop40h 25m

Wed 11/117:10 pm -

2 stops30h 20m

Deal found 9/20

$875

Tue 11/242:10 pm -

1 stop40h 25m

Tue 12/81:45 pm -

2 stops35h 45m

Deal found 9/21

$893

Best flights from O'Hare Intl to Ko Samui
Discover carefully curated flight deals from O'Hare Intl to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.

Mon 11/22:10 pm -

1 stop40h 25m

Mon 11/1611:40 am -

1 stop37h 50m

Deal found 9/21

$864

Mon 10/198:10 pm -

2 stops33h 50m

Thu 10/223:25 pm -

2 stops30h 15m

Deal found 9/19

$1,174

Wed 11/411:30 pm -

2 stops27h 10m

Wed 11/1112:15 pm -

3 stops30h 25m

Deal found 9/20

$1,486

Sun 11/152:10 pm -

1 stop40h 25m

Sat 11/2811:40 am -

1 stop37h 50m

Deal found 9/22

$1,093

Mon 10/194:15 pm -

1 stop39h 25m

Thu 10/2211:55 am -

1 stop38h 00m

Deal found 9/23

$2,170

Last-minute flights from O'Hare Intl to Ko Samui
Discover last-minute flight deals from O'Hare Intl to Ko Samui. Data last updated September 24, 2026 and is based on user searches.

Thu 9/2412:30 am -

2 stops25h 15m

Mon 10/56:55 pm -

2 stops37h 50m

Deal found 9/21

$1,154

Fri 9/254:15 pm -

2 stops28h 00m

Mon 10/57:45 pm -

3 stops30h 10m

Deal found 9/21

$1,599

Mon 10/198:10 pm -

2 stops33h 50m

Thu 10/223:25 pm -

2 stops30h 15m

Deal found 9/19

$1,174

Mon 10/194:15 pm -

1 stop39h 25m

Thu 10/2211:55 am -

1 stop38h 00m

Deal found 9/23

$2,170

One-way flights from O'Hare Intl to Ko Samui
Search for one-way flight options from O'Hare Intl to Ko Samui. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.

Mon 2/222:10 pm -

2 stops28h 00m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/21

$500

Tue 11/32:10 pm -

1 stop40h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/19

$506

Mon 2/222:10 pm -

2 stops28h 00m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/20

$527

Tue 11/36:35 pm -

3 stops29h 00m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/19

$802

Find flight deals from O'Hare Intl to Ko Samui

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$862 (oojo)
One-way from	$500 (KAYAK)

Provider with most accurate pricing for Chicago O'Hare Intl-Ko Samui flight deals.

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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Ko Samui flights.

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From Chicago O'Hare Intl to Ko Samui

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One-way flight from Chicago O'Hare Intl to Ko Samui

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Cheapflights 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

Cheapest round-trip

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Tue 11/3

2:10 pm-7:35 pm

1 stop40h 25m

Ko Samui

Wed 12/31

12:00 am-11:00 am

Nonstop0h 00m

$506

Quickest round-trip

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Mon 2/22

2:10 pm-7:10 am

2 stops28h 00m

Ko Samui

Wed 12/31

12:00 am-11:00 am

Nonstop0h 00m

$520

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Mon 2/22

2:10 pm-7:10 am

2 stops28h 00m

Ko Samui

Wed 12/31

12:00 am-11:00 am

Nonstop0h 00m

$527

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Tue 11/3

6:35 pm-12:35 pm

3 stops29h 00m

Ko Samui

Wed 12/31

12:00 am-11:00 am

Nonstop0h 00m

$802

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Mon 11/2

2:10 pm-7:35 pm

1 stop40h 25m

Ko Samui

Mon 11/16

11:40 am-12:30 pm

1 stop37h 50m

$864

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Sun 11/15

2:10 pm-7:35 pm

1 stop40h 25m

Ko Samui

Sat 11/28

11:40 am-12:30 pm

1 stop37h 50m

$1,093

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Mon 10/19

8:10 pm-6:00 pm

2 stops33h 50m

Ko Samui

Thu 10/22

3:25 pm-9:40 am

2 stops30h 15m

$1,174

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Mon 2/22

6:50 pm-4:25 pm

3 stops32h 35m

Ko Samui

Wed 12/31

12:00 am-11:00 am

Nonstop0h 00m

$1,197

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Wed 11/4

11:30 pm-3:40 pm

2 stops27h 10m

Ko Samui

Wed 11/11

12:15 pm-5:40 am

3 stops30h 25m

$1,486

ChicagoKo Samui

ORD Chicago O'Hare Intl - USM Ko Samui

ORDUSM

Chicago O'Hare Intl

Mon 10/19

4:15 pm-7:40 pm

1 stop39h 25m

Ko Samui

Thu 10/22

11:55 am-1:55 pm

1 stop38h 00m

$2,170

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/19

Sorted by cheapest first

Compare providers for flights from O'Hare Intl to Ko Samui

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Ko Samui in September.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-Ko Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Ko Samui flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Ko Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from O'Hare Intl to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from O'Hare Intl with our price prediction graph.

ORD-USM

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to Ko Samui

How often are flights from Chicago to Ko Samui delayed?

About 26% of weekly flights between Chicago and Ko Samui have experienced delays in the past year, with the average delay time being 155 minutes.

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

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

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

Tuesday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

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

Over the last year, Delta have had the lowest number of delays on this route, with just 21% of flights being delayed.

The best insider tips for Chicago O'Hare Intl Airport to Ko Samui flights

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to Ko Samui trip

Our travel experts

Harriet Baskas

Expert on United Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

What airport do you fly into for flights to Ko Samui from Chicago O'Hare Intl?
Most people fly into Ko Samui (USM) if they book a flight to Ko Samui from Chicago O'Hare Intl. On average, Ko Samui has 0 inbound flights from Chicago O'Hare Intl per day from 0 airlines. Ko Samui is conveniently located just 2.1 mi from Ko Samui’s city center.
How long is the flight from Chicago O'Hare Intl Airport to Ko Samui?
For as low as $1,174, Cathay Pacific can have you in Ko Samui from Chicago O'Hare Intl Airport in 33h 50m. The distance between Chicago O'Hare Intl Airport and Ko Samui is about 8835 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
Can I find deals for flights from O'Hare Intl to Ko Samui that include hotel bookings?
Yes. In addition to deals on O'Hare Intl to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from O'Hare Intl to Ko Samui?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Ko Samui.
Can I find deals for business class flights from O'Hare Intl to Ko Samui?
Yes. Cheapflights offers flight deals from O'Hare Intl to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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$500+ Cheap flights from O'Hare Intl (ORD) to Ko Samui (USM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/22. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from O'Hare Intl to Ko Samui with Cheapflights

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Cheap flight deals from O'Hare Intl to Ko Samui

Cheapest flights from O'Hare Intl to Ko SamuiExplore the most affordable flight options available from O'Hare Intl to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 24, 2026.

Explore the most affordable flight options available from O'Hare Intl to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 24, 2026.

Best flights from O'Hare Intl to Ko SamuiDiscover carefully curated flight deals from O'Hare Intl to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.

Discover carefully curated flight deals from O'Hare Intl to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.

Last-minute flights from O'Hare Intl to Ko SamuiDiscover last-minute flight deals from O'Hare Intl to Ko Samui. Data last updated September 24, 2026 and is based on user searches.

Discover last-minute flight deals from O'Hare Intl to Ko Samui. Data last updated September 24, 2026 and is based on user searches.

One-way flights from O'Hare Intl to Ko SamuiSearch for one-way flight options from O'Hare Intl to Ko Samui. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.

Search for one-way flight options from O'Hare Intl to Ko Samui. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.

Find flight deals from O'Hare Intl to Ko Samui

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Round-trip from

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Cheapflights 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.

Compare providers for flights from O'Hare Intl to Ko Samui

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Ko Samui in September.

Best time to book a flight from O'Hare Intl to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from O'Hare Intl with our price prediction graph.

Cheapflights Insights

How often are flights from Chicago to Ko Samui delayed?

About 26% of weekly flights between Chicago and Ko Samui have experienced delays in the past year, with the average delay time being 155 minutes.

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

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

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

Tuesday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

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

Over the last year, Delta have had the lowest number of delays on this route, with just 21% of flights being delayed.

The best insider tips for Chicago O'Hare Intl Airport to Ko Samui flights

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to Ko Samui trip

Our travel experts

Related info for your journey

What airport do you fly into for flights to Ko Samui from Chicago O'Hare Intl?

How long is the flight from Chicago O'Hare Intl Airport to Ko Samui?

Can I find deals for flights from O'Hare Intl to Ko Samui that include hotel bookings?

How can I find direct flights from O'Hare Intl to Ko Samui?

Can I find deals for business class flights from O'Hare Intl to Ko Samui?

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Alternative routes for O'Hare Intl to Ko Samui

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Complete your trip

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Search flights from O'Hare Intl to Ko Samui by cabin class

Find flights from O'Hare Intl to Ko Samui, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Ko Samui

Explore flights to Ko Samui departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 24, 2026.

O'Hare Intl and Ko Samui flights

Browse other O'Hare Intl and Ko Samui flight options. Last updated on September 24, 2026.

Other flights from O'Hare Intl

Browse through other flights departing from O'Hare Intl. Flights are based on user searches made on Cheapflights and were last updated on September 24, 2026.

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Cheapest flights from O'Hare Intl to Ko Samui
Explore the most affordable flight options available from O'Hare Intl to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 24, 2026.

Best flights from O'Hare Intl to Ko Samui
Discover carefully curated flight deals from O'Hare Intl to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 24, 2026.

Last-minute flights from O'Hare Intl to Ko Samui
Discover last-minute flight deals from O'Hare Intl to Ko Samui. Data last updated September 24, 2026 and is based on user searches.

One-way flights from O'Hare Intl to Ko Samui
Search for one-way flight options from O'Hare Intl to Ko Samui. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.