Polaris offers lie-flat seats with noise-reducing headphones and large entertainment screens.
United Polaris Lounge access includes showers and napping areas with daybeds and white noise.
$575+ Cheap flights from O'Hare Intl (ORD) 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — USM
Feb 12 — Feb 191
1 adult, Economy
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Find cheap flights from O'Hare Intl 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 O'Hare Intl to Ko Samui
Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) 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 January 13, 2026.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $989 (FlightHub) |
One-way from | $575 (Kiwi.com) |
Find flight deals from O'Hare Intl to Ko Samui
Cheapest flights from O'Hare Intl to Ko SamuiExplore the most affordable flight options available from O'Hare Intl to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 13, 2026.
Explore the most affordable flight options available from O'Hare Intl to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 13, 2026.
This FlightHub deal was found by Cheapflights users on 1/12. 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 11/2411:30 pm
ORD
- USM
2 stops29h 10m
EVA Air
Tue 12/87:00 am
USM
- ORD
2 stops25h 35m
EVA Air
Deal found 1/12![EVA Air logo]()
$985
This FlightHub deal was found by Cheapflights users on 1/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:30 pm
ORD
- USM
2 stops27h 55m
EVA Air
Sun 3/155:40 pm
USM
- ORD
2 stops38h 55m
EVA Air
Deal found 1/10![EVA Air logo]()
$989
This oojo deal was found by Cheapflights users on 1/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/78:20 pm
ORD
- USM
2 stops33h 05m
Multiple Airlines
Mon 3/167:10 pm
USM
- ORD
2 stops27h 55m
Multiple Airlines
Deal found 1/11![Multiple Airlines logo]()
$1,004
This FlightHub deal was found by Cheapflights users on 1/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1412:30 am
ORD
- USM
2 stops27h 05m
EVA Air
Thu 3/268:30 am
USM
- ORD
2 stops24h 05m
EVA Air
Deal found 1/11![EVA Air logo]()
$1,022
This FlightHub deal was found by Cheapflights users on 1/12. 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.
Sun 11/2211:30 pm
ORD
- USM
2 stops42h 40m
EVA Air
Sun 12/67:00 am
USM
- ORD
2 stops49h 35m
EVA Air
Deal found 1/12![EVA Air logo]()
$1,038
This FlightHub deal was found by Cheapflights users on 1/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/1511:30 pm
ORD
- USM
2 stops30h 25m
EVA Air
Sun 1/257:10 pm
USM
- ORD
2 stops37h 25m
EVA Air
Deal found 1/11![EVA Air logo]()
$1,049
This FlightHub deal was found by Cheapflights users on 1/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/912:30 am
ORD
- USM
2 stops27h 55m
EVA Air
Tue 4/78:35 pm
USM
- ORD
2 stops36h 25m
EVA Air
Deal found 1/11![EVA Air logo]()
$1,051
This EVA Air deal was found by Cheapflights users on 1/11. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:30 am
ORD
- USM
2 stops27h 05m
EVA Air
Sun 11/19:10 pm
USM
- ORD
2 stops35h 25m
EVA Air
Deal found 1/11![EVA Air logo]()
$1,054
This oojo deal was found by Cheapflights users on 1/12. 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.
Sat 3/288:10 pm
ORD
- USM
2 stops24h 25m
Multiple Airlines
Sun 4/124:25 pm
USM
- ORD
2 stops29h 15m
Multiple Airlines
Deal found 1/12![Multiple Airlines logo]()
$1,070
This oojo deal was found by Cheapflights users on 1/13. 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.
Sat 3/78:20 pm
ORD
- USM
2 stops33h 05m
Multiple Airlines
Fri 3/139:10 pm
USM
- ORD
2 stops34h 15m
Multiple Airlines
Deal found 1/13![Multiple Airlines logo]()
$1,072
This Trip.com deal was found by Cheapflights users on 1/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/251:10 pm
ORD
- USM
2 stops29h 25m
Multiple Airlines
Wed 3/48:50 am
USM
- ORD
2 stops59h 45m
Multiple Airlines
Deal found 1/11![Multiple Airlines logo]()
$1,080
Cheapflights Fare Finder
Customize your flight search to find flights from O'Hare Intl 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 January 13, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Ko Samui that are best for you.
Fly from
O'Hare Intl
Fly to
Ko Samui
Route
Depart
Return
Price
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Wed 3/4
11:30 pm-4:25 pm
2 stops27h 55m
Ko Samui
Sun 3/15
5:40 pm-8:35 pm
2 stops38h 55m
$989
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Sat 3/7
8:20 pm-6:25 pm
2 stops33h 05m
Ko Samui
Fri 3/13
9:10 pm-7:25 pm
2 stops34h 15m
$1,072
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Sun 3/8
12:50 pm-10:40 am
2 stops33h 50m
Ko Samui
Tue 3/17
7:00 pm-11:05 am
2 stops28h 05m
$1,086
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Wed 2/25
11:30 pm-9:20 pm
2 stops32h 50m
Ko Samui
Fri 3/6
9:00 am-7:35 pm
2 stops23h 35m
$1,087
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Thu 2/12
11:30 pm-5:50 pm
2 stops29h 20m
Ko Samui
Thu 2/26
9:00 am-7:35 pm
2 stops23h 35m
$1,098
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Sat 3/7
11:30 pm-3:35 pm
2 stops27h 05m
Ko Samui
Fri 3/13
7:35 pm-8:35 pm
2 stops37h 00m
$1,125
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Thu 1/29
11:30 pm-8:10 am
2 stops43h 40m
Ko Samui
Tue 2/10
7:30 pm-7:35 pm
2 stops37h 05m
$1,151
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Sat 3/14
9:20 pm-10:40 am
2 stops25h 20m
Ko Samui
Thu 3/26
4:25 pm-11:05 am
2 stops30h 40m
$1,193
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Thu 3/26
12:30 am-3:40 pm
2 stops27h 10m
Ko Samui
Mon 4/13
7:10 pm-9:00 pm
2 stops37h 50m
$1,214
ChicagoKo Samui
ORD - USM
ORDUSM
Chicago O'Hare Intl
Tue 3/24
12:30 am-8:25 pm
2 stops31h 55m
Ko Samui
Sun 4/5
11:55 am-9:00 pm
2 stops45h 05m
$1,263
Showing 1-10 of 14 results
Compare providers for flights from O'Hare Intl to Ko Samui
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Ko Samui in January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-Ko Samui flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chicago O'Hare Intl Airport-Ko Samui flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Ko Samui flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Ko Samui flights, Cheapflights users trust eDreams the most. eDreams 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 Chicago O'Hare Intl Airport-Ko Samui 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 O'Hare Intl to Ko Samui
Have a flexible travel schedule? Discover the best time to fly to Ko Samui from O'Hare Intl 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 O'Hare Intl Airport to Ko Samui
Prices
Delays
What is the cheapest time of day to fly from ORD to USM?
Find hourly flight availability from O'Hare Intl 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 January 13, 2026.
It’s typically best to fly out from Chicago O'Hare Intl Airport to Ko Samui at noon. Doing so could potentially save you 42% on the flight price compared to flying in the afternoon, which is usually more expensive.
What is the cheapest day to fly from Chicago O'Hare Intl Airport to Ko Samui?
Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Ko Samui. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Ko Samui flight should consider departing on Friday evenings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from Chicago to Ko Samui delayed?
About 17% of weekly flights between Chicago and Ko Samui have experienced delays in the past year, with the average delay time being 131 minutes.
What is the most punctual flight time for Chicago to Ko Samui flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Chicago to Ko Samui flights?
Over the last year, Spirit Airlines have had the lowest number of delays on this route, with just 12% of flights being delayed.
The best insider tips for Chicago O'Hare Intl Airport to Ko Samui 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 Chicago O'Hare Intl Airport to Ko Samui trip
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 January 13, 2026.
Read reviews from past customers who have flown EVA Air from Chicago O'Hare Intl Airport to Ko Samui. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.4
Comfort
8.3
Crew
8.6
Entertainment
8.0
Boarding
8.4
Food
8.1
Reviews
1 / 20
6.0
GoodHannah,Jan 2026
SFO - TPE
Overall
8.4
Comfort
8.3
Crew
8.6
Entertainment
8.0
Boarding
8.4
Food
8.1
Reviews
1 / 20
6.0
GoodHannah,Jan 2026
SFO - TPE
Related info for your journey
Find useful and relevant information for your journey from O'Hare Intl to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Ko Samui?
Book flights to Ko Samui if you plan to visit one of these locationsKo Tao
Ko Pha Ngan
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Alternative routes for O'Hare Intl to Ko Samui
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from O'Hare Intl to Ko Samui
Discover the top airline that operate flights from O'Hare Intl 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 January 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$1,103 | Average$1,218 | FlexibilityNo cancel fee | On-time74% |