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Ko Samui

$476+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — USM
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
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 septiembre 11, 2025.

Round-trip from

$980
(FlightHub)

One-way from

$476
(Booking.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 septiembre 11, 2025.

This SmartFares deal was found by Cheapflights users on 9/11. 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.
mar. 9/3012:30 amORD - USM
2 stops25h 15mEVA Air
mié. 10/158:00 amUSM - ORD
2 stops24h 45mEVA Air
Deal found 9/11$1,050
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/3011:50 amORD - USM
2 stops30h 20mMultiple Airlines
sáb. 12/68:30 pmUSM - ORD
2 stops34h 55mMultiple Airlines
Deal found 9/10$1,057
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/711:50 amORD - USM
2 stops30h 55mMultiple Airlines
vie. 12/268:40 pmUSM - ORD
2 stops34h 45mMultiple Airlines
Deal found 9/10$1,186
This EVA Air deal was found by Cheapflights users on 9/10. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/112:30 amORD - USM
2 stops26h 40mEVA Air
lun. 10/68:00 amUSM - ORD
2 stops24h 45mEVA Air
Deal found 9/10$1,238
This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/301:05 amORD - USM
2 stops46h 35mMultiple Airlines
mié. 10/158:45 amUSM - ORD
3 stops38h 48mMultiple Airlines
Deal found 9/11$1,247
This Emirates deal was found by Cheapflights users on 9/9. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/28:35 pmORD - USM
2 stops36h 35mEmirates
lun. 10/64:25 pmUSM - ORD
2 stops35h 20mEmirates
Deal found 9/9$1,834

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 septiembre 11, 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

mar. 9/30

12:30 am-1:45 pm

2 stops25h 15m

Ko Samui

mié. 10/15

8:00 am-8:45 pm

2 stops24h 45m

$1,050

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

dom. 11/30

11:50 am-7:10 am

2 stops30h 20m

Ko Samui

sáb. 12/6

8:30 pm-6:25 pm

2 stops34h 55m

$1,057

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

dom. 12/7

11:50 am-7:45 am

2 stops30h 55m

Ko Samui

vie. 12/26

8:40 pm-6:25 pm

2 stops34h 45m

$1,186

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

mié. 10/1

12:30 am-3:10 pm

2 stops26h 40m

Ko Samui

lun. 10/6

8:00 am-8:45 pm

2 stops24h 45m

$1,238

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

mié. 10/1

12:10 pm-10:10 am

2 stops34h 00m

Ko Samui

mié. 10/15

7:10 pm-3:45 pm

2 stops32h 35m

$1,358

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

lun. 10/6

1:05 am-10:10 am

2 stops45h 05m

$476

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

dom. 9/21

1:05 am-8:15 am

2 stops43h 10m

$491

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

sáb. 10/11

7:40 pm-9:10 pm

2 stops37h 30m

$548

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

mar. 10/7

4:00 pm-6:35 pm

1 stop38h 35m

$861

ChicagoKo Samui

ORD - USM

ORDUSM

Chicago O'Hare Intl

sáb. 10/11

4:00 pm-6:35 pm

1 stop38h 35m

$981

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 12 results
1
2

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 septiembre 11, 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 septiembre 11, 2025.
Peruse reviews from past customers who have flown with EVA Air 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
1,236 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
EVA Air
8.4
Very good
1,236 reviews
EVA Air
8.4
Very good
1,236 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

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.

  • How long is the flight from Chicago to Ko Samui?

    EVA Air can get you from Chicago to Ko Samui in just under 25h 15m. Your travel time can differ by up to . Chicago and Ko Samui are separated by a distance of 8835 mi.

  • What is the cheapest airline to fly from Chicago to Ko Samui round-trip?

    According to our current data, EVA Air ($1,112), offers the cheapest pricing from Chicago to Ko Samui.

  • 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 Ko Samui?

Book flights to Ko Samui 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,112Average$1,311FlexibilityNo cancel feeOn-time74%

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