$488 Cheap Flights from Chicago (ORD) to Samui Intl. Airport (USM)

View $488 flight on Tue, Oct 21, 2025Opens in a new window

Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Samui Intl. Airport (USM)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Chicago to Samui Intl. Airport (ORD-USM)

Prices were available within the past 7 days and start at $488 for one-way flights and $853 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Oct 21 - Tue, Nov 11
ORD
Chicago
USM
Koh Samui
$853 Roundtrip, found 1 day ago
$853
Roundtrip
found 1 day ago
Select United flight, departing Tue, Oct 21 from Chicago to Koh Samui, returning Tue, Nov 11, priced at $853 found 1 day ago
United
Mon, Apr 27 - Mon, May 4
ORD
Chicago
USM
Koh Samui
$858 Roundtrip, found 4 days ago
$858
Roundtrip
found 4 days ago
Select United flight, departing Mon, Apr 27 from Chicago to Koh Samui, returning Mon, May 4, priced at $858 found 4 days ago
United
Tue, Oct 21 - Tue, Nov 11
ORD
Chicago
USM
Koh Samui
$872 Roundtrip, found 1 day ago
$872
Roundtrip
found 1 day ago
Select United flight, departing Tue, Oct 21 from Chicago to Koh Samui, returning Tue, Nov 11, priced at $872 found 1 day ago
United
Mon, Apr 27 - Mon, May 4
ORD
Chicago
USM
Koh Samui
$875 Roundtrip, found 4 days ago
$875
Roundtrip
found 4 days ago
Select United flight, departing Mon, Apr 27 from Chicago to Koh Samui, returning Mon, May 4, priced at $875 found 4 days ago
United
Wed, Apr 29 - Thu, May 7
ORD
Chicago
USM
Koh Samui
$887 Roundtrip, found 6 days ago
$887
Roundtrip
found 6 days ago
Select United flight, departing Wed, Apr 29 from Chicago to Koh Samui, returning Thu, May 7, priced at $887 found 6 days ago
United
Sun, Feb 1 - Thu, Feb 5
ORD
Chicago
USM
Koh Samui
$903 Roundtrip, found 1 day ago
$903
Roundtrip
found 1 day ago
Select United flight, departing Sun, Feb 1 from Chicago to Koh Samui, returning Thu, Feb 5, priced at $903 found 1 day ago
Japan Airlines
Sun, Nov 16 - Thu, Nov 20
ORD
Chicago
USM
Koh Samui
$967 Roundtrip, found 1 day ago
$967
Roundtrip
found 1 day ago
Select Japan Airlines flight, departing Sun, Nov 16 from Chicago to Koh Samui, returning Thu, Nov 20, priced at $967 found 1 day ago
Turkish Airlines
Tue, Nov 18 - Wed, Dec 3
ORD
Chicago
USM
Koh Samui
$1,044 Roundtrip, found 10 hours ago
$1,044
Roundtrip
found 10 hours ago
Select Turkish Airlines flight, departing Tue, Nov 18 from Chicago to Koh Samui, returning Wed, Dec 3, priced at $1,044 found 10 hours ago
Etihad Airways
Tue, Nov 11 - Sun, Nov 23
ORD
Chicago
USM
Koh Samui
$1,085 Roundtrip, found 10 hours ago
$1,085
Roundtrip
found 10 hours ago
Select Etihad Airways flight, departing Tue, Nov 11 from Chicago to Koh Samui, returning Sun, Nov 23, priced at $1,085 found 10 hours ago
EVA Airways
Mon, Mar 16 - Wed, Apr 1
ORD
Chicago
USM
Koh Samui
$1,103 Roundtrip, found 10 hours ago
$1,103
Roundtrip
found 10 hours ago
Select EVA Airways flight, departing Mon, Mar 16 from Chicago to Koh Samui, returning Wed, Apr 1, priced at $1,103 found 10 hours ago

Alternative airports near Koh Samui

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Samui Intl. Airport USM. Cheapest and Closest option available. Average driving time to city center is 31 minutes. Flights from $1,259
USM
Samui Intl. Airport
CheapestClosest
Average driving time to city center31 min
Flights from $1,259

Frequently asked questions

How much does a flight from O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM) cost?
Secure a cheap one-way flight from $488 or cheap return flight from $853 from O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM)?
The cheapest month to fly from ORD to USM is October, when demand is low. Off-peak season is typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM)?
To find the cheapest airline that'll fly you from ORD to USM, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM)?
Direct flights from O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ORD to USM?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM)?
To avoid possible delays on the O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM) route, aim to travel before 3 PM. Later flights have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM) last-minute?
Booking your flight from ORD to USM shortly before your getaway is typically more expensive. But if you're flexible with your departure times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book an ORD to USM flight and hotel package?
You'll generally save money by securing an ORD to USM flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. Once you've selected your preferred flights and accommodations, consider adding extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Ko Samui Airport (USM)?
Typically, it's possible to cancel or reschedule your ORD to USM flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

Origin airport
O'Hare Intl.
Destination airport
Samui Intl. Airport
Airlines serving
Air France, Austrian Airlines, British Airways, EVA Airways, Etihad Airways, Japan Airlines, KLM, Lufthansa, Qatar Airways, Swiss International Air Lines, Turkish Airlines
Roundtrip price
$852
Distance
8840 mi

Book with confidence

Book with confidence

Chicago to Samui Intl. Airport Flights

The cheapest times to fly from Chicago to Samui Intl. Airport

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Chicago to Samui Intl. Airport are during the month of October. You can find some of the cheapest flights from Chicago to Samui Intl. Airport with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chicago to Samui Intl. Airport

Sunday is one of the best days to book for cheap flights from Chicago to Samui Intl. Airport: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Chicago to Samui Intl. Airport

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Chicago to Samui Intl. Airport in 2025. You can also book with separate airlines for your outbound and return journeys, from $488 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Chicago to Samui Intl. Airport flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Chicago to Samui Intl. Airport airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Chicago to Samui Intl. Airport Flights
*Available to One Key members.