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$544+ Cheap flights from Ko Samui (USM) to Chicago (CHI)

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 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
USM — CHI
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap 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 September 15, 2025.

Round-trip from

$1,863
(Qatar Airways)

One-way from

$544
(Expedia)
From Ko Samui to Chicago (CHI)
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One-way flight from Ko Samui to Chicago (CHI)
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Find 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 September 15, 2025.

This Qatar Airways deal was found by Cheapflights users on 9/14. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/101:30 pmUSM - ORD
2 stops37h 20mQatar Airways
Tue 10/147:40 pmORD - USM
2 stops26h 50mQatar Airways
Deal found 9/14$1,863
This EVA Air deal was found by Cheapflights users on 9/14. 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.
Fri 10/108:00 amUSM - ORD
2 stops24h 45mEVA Air
Mon 10/1312:30 amORD - USM
2 stops26h 40mEVA Air
Deal found 9/14$1,964

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 September 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

Fri 10/10

1:30 pm-2:50 pm

2 stops37h 20m

Chicago O'Hare Intl

Tue 10/14

7:40 pm-2:40 pm

2 stops31h 00m

$1,863

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Fri 10/10

8:45 am-8:45 pm

2 stops24h 00m

Chicago O'Hare Intl

Mon 10/13

12:30 am-2:45 pm

2 stops26h 15m

$1,964

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Fri 2/13

7:10 pm-2:41 pm

2 stops32h 31m

$544

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

The best insider tips for Ko Samui to Chicago flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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

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 September 15, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 62% 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 Wednesday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 Qatar Airways and EVA Air fly from Ko Samui to Chicago in about 24h. The time it takes to get you to your destination can typically vary by up to 13h 20m. Ko Samui and Chicago are separated by a distance of 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 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.

  • What is the cheapest month to book a flight from Ko Samui to Chicago?

    Currently, August is the cheapest month in which you can book a flight from Ko Samui to Chicago (average of $245). Flying from Ko Samui to Chicago in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Chicago?

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