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$1,155+ Cheap flights from Ko Samui (USM) to Illinois

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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
USM — ORD
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Ko Samui to Illinois

Keep the following information in mind while searching for Ko Samui to Illinois flight deals. Data was last updated May 1, 2025.

Round-trip from

$1,422
(EVA Air)
From Ko Samui to Illinois
Search Deals

Find flight deals from Ko Samui to Illinois

Cheapest flights from Ko Samui to Illinois
Explore the most affordable flight options available from Ko Samui to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This Travelocity deal was found by Cheapflights users on 4/29. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/294:25 pmUSM - ORD
2 stops31h 45mMultiple Airlines
Thu 6/57:05 pmORD - USM
2 stops31h 40mMultiple Airlines
Deal found 4/29$1,155
This EVA Air deal was found by Cheapflights users on 4/30. 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 9/127:00 amUSM - ORD
2 stops25h 45mEVA Air
Tue 10/1412:30 amORD - USM
2 stops26h 15mEVA Air
Deal found 4/30$1,422
This Turkish Airlines deal was found by Cheapflights users on 4/30. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/127:30 pmUSM - ORD
2 stops26h 10mTurkish Airlines
Wed 10/157:50 pmORD - USM
2 stops24h 25mTurkish Airlines
Deal found 4/30$1,471
This Gurufare deal was found by Cheapflights users on 4/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2910:55 amUSM - ORD
1 stop39h 30mCathay Pacific
Thu 6/54:00 pmORD - USM
1 stop38h 35mCathay Pacific
Deal found 4/29$1,484
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/294:25 pmUSM - ORD
2 stops35h 30mSWISS
Thu 6/58:15 pmORD - USM
3 stops28h 30mSWISS
Deal found 4/29$1,573

Cheapflights Fare Finder

Customize your flight search to find flights from Ko Samui to Illinois 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 May 1, 2025.
Use the filters below to find and compare flights from Ko Samui to Illinois that are best for you.

Fly from

Ko Samui

Fly to

Illinois

Route

Depart

Return

Price

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Fri 9/12

7:00 am-8:45 pm

2 stops25h 45m

Chicago O'Hare Intl

Tue 10/14

12:30 am-2:45 pm

2 stops26h 15m

$1,422

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Fri 9/12

7:30 pm-9:40 am

2 stops26h 10m

Chicago O'Hare Intl

Wed 10/15

7:50 pm-8:15 am

2 stops24h 25m

$1,471

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Fri 9/12

10:55 am-2:25 pm

1 stop39h 30m

Chicago O'Hare Intl

Wed 10/15

4:00 pm-6:35 pm

1 stop38h 35m

$1,487

Ko SamuiChicago

USM - ORD

USMORD

Ko Samui

Fri 9/12

5:55 pm-3:05 pm

2 stops33h 10m

Chicago O'Hare Intl

Wed 10/15

6:00 am-8:15 am

3 stops38h 15m

$1,863

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Best time to book a flight from Ko Samui to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois 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 Illinois

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

Find hourly flight availability from Ko Samui to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ko Samui to Illinois as you normally would.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated May 1, 2025.
EVA Air
8.4
Very good
1,186 reviews

Food

8.1

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
EVA Air
8.4
Very good
1,186 reviews
EVA Air
8.4
Very good
1,186 reviews

Food

8.1

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Cathay Pacific
7.5
Good
855 reviews
EVA Air
8.4
Very good
1,186 reviews

Food

8.1

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Turkish Airlines
7.3
Good
3,790 reviews
EVA Air
8.4
Very good
1,186 reviews

Food

8.1

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

Related info for your journey

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

    Located just 2.1 mi from the city center, Ko Samui (USM) is the airport most travelers will use when flying to Illinois from Ko Samui.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Ko Samui to Illinois (average of $245). Flying from Ko Samui to Illinois 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.

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