$1,012+ Cheap flights from Illinois to Chiang Rai (CEI)
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 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — CEI
Jan 15 — Jan 221
1 adult, Economy
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1. Tell us where you want to go
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Best flights from Illinois to Chiang RaiDiscover carefully curated flight deals from Illinois to Chiang Rai that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.
Discover carefully curated flight deals from Illinois to Chiang Rai that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.
This Trip.com deal was found by Cheapflights users on 12/16. 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.
Fri 1/3011:30 pmORD - CEI
2 stops27h 25mMultiple Airlines
Fri 2/68:40 amCEI - ORD
2 stops23h 55mMultiple Airlines
Deal found 12/16![Multiple Airlines logo]()
$1,012
Find flight deals from Illinois to Chiang Rai
Keep the following information in mind while searching for Illinois to Chiang Rai flight deals. Data was last updated December 16, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $1,012 (Trip.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Chiang Rai 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 December 16, 2025.
Use the filters below to find and compare flights from Illinois to Chiang Rai that are best for you.
Fly from
Illinois
Fly to
Chiang Rai
Route
Depart
Return
Price
ChicagoChiang Rai
ORD - CEI
ORDCEI
Chicago O'Hare Intl
Fri 1/30
11:30 pm-3:55 pm
2 stops27h 25m
Chiang Rai
Fri 2/6
8:40 am-7:35 pm
2 stops23h 55m
$1,012
Best time to book a flight from Illinois to Chiang Rai
Have a flexible travel schedule? Discover the best time to fly to Chiang Rai from Illinois 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 Illinois to Chiang Rai
What is the cheapest month to book a flight from Illinois to Chiang Rai?
Currently, February is the cheapest month in which you can book a flight from Illinois to Chiang Rai (average of $737). Flying from Illinois to Chiang Rai in June is currently the most expensive (average of $1,585). 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.