$563+ Cheap flights from Illinois 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Illinois to Ko Samui with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to Ko Samui
Keep the following information in mind while searching for Illinois to Ko Samui flight deals. Data was last updated May 1, 2025.
Most accurate provider | AranGrant 3 stars |
|---|---|
Most trusted provider | AranGrant 3 stars |
Round-trip from | $1,619 (Gotogate) |
One-way from | $714 (Kiwi.com) |
Find flight deals from Illinois to Ko Samui
Cheapest flights from Illinois to Ko SamuiExplore the most affordable flight options available from Illinois to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.
Explore the most affordable flight options available from Illinois to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 5/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Gurufare deal was found by Cheapflights users on 5/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Gurufare deal was found by Cheapflights users on 5/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This StudentUniverse 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Emirates deal was found by Cheapflights users on 5/1. 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 Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois 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 May 1, 2025.
Use the filters below to find and compare flights from Illinois to Ko Samui that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Fri 9/19
12:30 am-1:45 pm
2 stops25h 15m
Ko Samui
Mon 9/29
8:45 am-8:45 pm
2 stops24h 00m
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Sat 9/20
7:50 pm-11:40 am
2 stops27h 50m
Ko Samui
Mon 9/29
2:00 pm-9:40 am
2 stops31h 40m
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Sat 9/20
4:00 pm-6:35 pm
1 stop38h 35m
Ko Samui
Mon 9/29
10:55 am-2:25 pm
1 stop39h 30m
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Tue 6/10
1:30 am-5:45 pm
2 stops28h 15m
Ko Samui
Wed 6/25
7:00 am-4:00 pm
2 stops45h 00m
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Sat 9/20
1:35 pm-9:10 pm
3 stops43h 35m
Ko Samui
Mon 9/29
1:30 pm-7:48 pm
2 stops42h 18m
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Wed 6/25
6:15 am-7:20 am
3 stops37h 05m
Ko Samui
Mon 6/30
5:25 pm-3:05 pm
2 stops33h 40m
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Sun 6/15
8:35 pm-9:20 am
2 stops48h 45m
Ko Samui
Sun 6/22
5:50 pm-3:45 pm
2 stops33h 55m
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Fri 6/13
1:30 am-6:30 pm
2 stops29h 00m
Ko Samui
Sat 6/21
7:10 pm-4:00 pm
3 stops32h 50m
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Thu 6/12
8:15 pm-12:45 pm
3 stops28h 30m
Ko Samui
Thu 6/19
4:25 pm-12:10 pm
2 stops31h 45m
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Sun 9/7
5:45 pm-9:20 am
2 stops27h 35m
Best time to book a flight from Illinois to Ko Samui
Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Illinois with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Illinois to Ko Samui
What is the cheapest time of day to fly from IL to USM?
Find hourly flight availability from Illinois 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 May 1, 2025.
When flying from Illinois to Ko Samui, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Rainfall in Ko Samui by month
Plan your trip to Ko Samui by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Ko Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Ko Samui when rainfall is around 2.3 in.
Temperature in Ko Samui by month
Plan your trip to Ko Samui by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).
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 May 1, 2025.
Overall
Boarding
Comfort
Food
Entertainment
Crew
Reviews
Dale,Apr 2025
SFO - TPE
Overall
Boarding
Comfort
Food
Entertainment
Crew
Reviews
Dale,Apr 2025
SFO - TPE
Overall
Boarding
Comfort
Food
Entertainment
Crew
Reviews
Dale,Apr 2025
SFO - TPE
Overall
Boarding
Comfort
Food
Entertainment
Crew
Reviews
Dale,Apr 2025
SFO - TPE
Overall
Boarding
Comfort
Food
Entertainment
Crew
Reviews
Dale,Apr 2025
SFO - TPE
Overall
Boarding
Comfort
Food
Entertainment
Crew
Reviews
Dale,Apr 2025
SFO - TPE
Related info for your journey
Find useful and relevant information for your journey from Illinois to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Illinois to Ko Samui
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Illinois to Ko Samui
Discover the top airline that operate flights from Illinois 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 May 1, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$1,147 | Average$1,520 | FlexibilityNo cancel fee | On-time74% |