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$2,106+ Cheap flights from Ko Samui (USM) to Chicago (CHI)

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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
USM — CHI
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Ko Samui to Chicago

Cheapest flights from Ko Samui to Chicago
Explore the most affordable flight options available from Ko Samui to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This oojo deal was found by Cheapflights users on 12/15. 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.
Tue 12/233:50 pmUSM - ORD
2 stops35h 40mMultiple Airlines
Sun 12/286:50 pmORD - USM
2 stops48h 00mMultiple Airlines
Deal found 12/15$2,106
This FlightHub deal was found by Cheapflights users on 12/15. 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.
Tue 12/235:25 pmUSM - ORD
2 stops32h 30mCathay Pacific
Sun 12/282:35 pmORD - USM
1 stop40h 00mCathay Pacific
Deal found 12/15$2,761

Find flight deals from Ko Samui to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Ko Samui (USM) to Chicago (CHI). 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 December 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$2,106
(oojo)
Provider with most accurate pricing for Ko Samui-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ko Samui-Chicago (CHI) flights.
Search Deals
From Ko Samui to Chicago (CHI)
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Ko Samui to Chicago 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 December 15, 2025.
Use the filters below to find and compare flights from Ko Samui to Chicago that are best for you.

Fly from

Ko Samui

Fly to

Chicago

Route

Depart

Return

Price

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Tue 12/23

3:50 pm-2:30 pm

2 stops35h 40m

Chicago O'Hare Intl

Sun 12/28

6:50 pm-7:50 am

2 stops48h 00m

$2,106

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Tue 12/23

5:25 pm-12:55 pm

2 stops32h 30m

Chicago O'Hare Intl

Sun 12/28

2:35 pm-7:35 pm

1 stop40h 00m

$2,761

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

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

Have a flexible travel schedule? Discover the best time to fly to Chicago from Ko Samui 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 Ko Samui to Chicago

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

Find hourly flight availability from Ko Samui to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 38% on flights from Ko Samui to Chicago by exploring options for tickets in the evening.

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

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

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

The best insider tips for Ko Samui to Chicago 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 Ko Samui to Chicago trip
Airlines
Frontier

Frontier's UpFront Plus seats include a guaranteed empty middle seat and 32” separation.


Frontier's Premium Bundle offers a carry-on, seat selection, and Board First boarding.

Read more about FrontierBy Marisa Garcia
United Airlines

United's Polaris Business Class offers lie-flat seats, noise-reducing headphones, and upscale amenity kits.


United's Premium Plus includes extra legroom, upgraded meals, and two checked bags on international flights.

Read more about United AirlinesBy Harriet Baskas
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

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.

Read more

Related info for your journey

Find useful and relevant information for your journey from Ko Samui to Chicago. 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 from for flights from Ko Samui to Chicago?

    Ko Samui (USM) is the airport you will fly out of if you book a flight from Ko Samui to Chicago. You should not have trouble finding flights to Chicago from Ko Samui; the airport handles an average of 0 outbound flights to Chicago per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Ko Samui airport to Chicago. It is only a 2.1 mi journey to Ko Samui (USM) from Ko Samui’s city center.

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

    Airlines like Cathay Pacific fly from Ko Samui to Chicago in about 32h 30m. The time it takes to get you to your destination can typically vary by up to . Ko Samui and Chicago are separated by a distance of 8835 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ko Samui to Chicago 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?

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Hammond
Porter
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