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Ko Samui

$611+ Cheap flights from Chicago (CHI) to Ko Samui (USM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — USM
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Chicago to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 3, 2025.

Round-trip from

$872
(CheapTickets)

One-way from

$611
(Trip.com)
From Chicago (CHI) to Ko Samui
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One-way flight from Chicago (CHI) to Ko Samui
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Find flight deals from Chicago to Ko Samui

Cheapest flights from Chicago to Ko Samui
Explore the most affordable flight options available from Chicago to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This CheapTickets deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1412:50 pmORD - USM
2 stops36h 20mANA
Thu 8/211:30 pmUSM - ORD
2 stops42h 38mANA
Deal found 7/1$872
This FlightHub deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/207:50 pmORD - USM
2 stops24h 25mTurkish Airlines
Mon 9/297:00 pmUSM - ORD
2 stops26h 40mTurkish Airlines
Deal found 7/2$1,038
This FlightHub deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1912:30 amORD - USM
2 stops26h 40mEVA Air
Mon 9/299:15 amUSM - ORD
2 stops23h 30mEVA Air
Deal found 7/2$1,154
This CheapTickets deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1512:30 pmORD - USM
2 stops30h 45mMultiple Airlines
Fri 8/228:45 amUSM - ORD
2 stops36h 55mMultiple Airlines
Deal found 7/2$1,214
This SmartFares deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/61:55 pmORD - USM
2 stops33h 45mEtihad Airways
Wed 8/135:55 pmUSM - ORD
2 stops50h 50mEtihad Airways
Deal found 7/3$1,436

Cheapflights Fare Finder

Customize your flight search to find flights from Chicago to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
Use the filters below to find and compare flights from Chicago to Ko Samui that are best for you.

Fly from

Chicago

Fly to

Ko Samui

Route

Depart

Return

Price

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Thu 8/14

12:50 pm-1:10 pm

2 stops36h 20m

Ko Samui

Thu 8/21

1:30 pm-8:08 pm

2 stops42h 38m

$872

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Sat 9/20

7:50 pm-8:15 am

2 stops24h 25m

Ko Samui

Mon 9/29

7:00 pm-9:40 am

2 stops26h 40m

$1,038

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 9/19

12:30 am-2:45 pm

2 stops26h 15m

Ko Samui

Mon 9/29

8:45 am-8:45 pm

2 stops24h 00m

$1,154

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 8/15

12:30 pm-7:15 am

2 stops30h 45m

Ko Samui

Fri 8/22

8:45 am-9:40 am

2 stops36h 55m

$1,214

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 8/6

1:55 pm-11:40 am

2 stops33h 45m

Ko Samui

Wed 8/13

5:55 pm-8:45 am

2 stops50h 50m

$1,436

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 8/15

4:00 pm-7:15 am

2 stops27h 15m

$611

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Tue 8/19

12:30 am-5:05 pm

2 stops28h 35m

$659

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Wed 8/20

11:45 pm-6:00 pm

2 stops30h 15m

$664

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 8/15

4:00 pm-6:35 pm

1 stop38h 35m

$1,005

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

Fri 8/15

4:57 pm-9:20 am

3 stops28h 23m

$1,308

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 11 results
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Best time to book a flight from Chicago to Ko Samui

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

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

Find hourly flight availability from Chicago to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

One of the essential ways to save on airfare from Chicago to Ko Samui is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 64% on airfare.

What is the cheapest day to fly from Chicago to Ko Samui?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Ko Samui. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Chicago to Ko Samui flight should consider departing on Thursday evenings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ko Samui

Get insights into the airlines that provide service to Ko Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ko Samui. Reviews last updated July 3, 2025.
Peruse reviews from past customers who have flown with EVA Air, ANA, and Singapore Airlines from Chicago to Ko Samui to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,215 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
ANA
8.4
Very good
893 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Singapore Airlines
8.1
Very good
1,320 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Cathay Pacific
7.6
Good
921 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Qatar Airways
7.4
Good
3,594 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Related info for your journey

Find useful and relevant information for your journey from Chicago to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ko Samui from Chicago?

    Ko Samui (USM), located 2.1 mi from the city center, is the airport you fly into when you book flights from Chicago to Ko Samui. 1 airline have flights to Ko Samui from Chicago on a regular basis. Booking flights from Chicago to Ko Samui should not be difficult; the airport handles an average of 0 inbound flights from Chicago per day.

  • What are the cheapest airlines flying from Chicago to Ko Samui round-trip?

    According to our current data, ANA ($872), Turkish Airlines ($1,038), and EVA Air ($1,154) offers the cheapest pricing from Chicago to Ko Samui.

  • What are the cheapest airlines to fly from Chicago to Ko Samui one-way?

    To fly one-way, consider booking your trip with EVA Air, which is currently one of the cheapest options available, starting at $659. Turkish Airlines flights start at $664 while deals on Cathay Pacific start at $1,005 one-way.

  • Can I find deals for flights from Chicago to Ko Samui that include hotel bookings?

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

  • How can I find direct flights from Chicago to Ko Samui?

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

  • Can I find deals for business class flights from Chicago to Ko Samui?

    Yes. Cheapflights offers flight deals from Chicago 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.

See more FAQs

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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Top airline flying from Chicago to Ko Samui

Discover the top airline that operate flights from Chicago to Ko Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,148Average$1,520FlexibilityNo cancel feeOn-time74%

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