$376 Cheap Flights from Ontario (ONT) to Chiang Mai (CNX)

View $376 flight on Tue, Mar 10, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX)

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Cheap Flights from Ontario to Chiang Mai (ONT-CNX)

Prices were available within the past 7 days and start at $376 for one-way flights and $709 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Mar 16 - Wed, Mar 25
ONT
Ontario
CNX
Chiang Mai
$709 Roundtrip, found 2 days ago
$709
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Mar 16 from Ontario to Chiang Mai, returning Wed, Mar 25, priced at $709 found 2 days ago
Delta
Sat, Mar 21 - Wed, Mar 25
ONT
Ontario
CNX
Chiang Mai
$715 Roundtrip, found 2 days ago
$715
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Mar 21 from Ontario to Chiang Mai, returning Wed, Mar 25, priced at $715 found 2 days ago
Delta
Sun, Feb 22 - Thu, Feb 26
ONT
Ontario
CNX
Chiang Mai
$768 Roundtrip, found 5 days ago
$768
Roundtrip
found 5 days ago
Select Delta flight, departing Sun, Feb 22 from Ontario to Chiang Mai, returning Thu, Feb 26, priced at $768 found 5 days ago
Delta
Sat, Feb 14 - Wed, Mar 18
ONT
Ontario
CNX
Chiang Mai
$768 Roundtrip, found 3 days ago
$768
Roundtrip
found 3 days ago
Select Delta flight, departing Sat, Feb 14 from Ontario to Chiang Mai, returning Wed, Mar 18, priced at $768 found 3 days ago
STARLUX Airlines
Mon, Mar 16 - Sat, Mar 21
ONT
Ontario
CNX
Chiang Mai
$788 Roundtrip, found 2 days ago
$788
Roundtrip
found 2 days ago
Select STARLUX Airlines flight, departing Mon, Mar 16 from Ontario to Chiang Mai, returning Sat, Mar 21, priced at $788 found 2 days ago
Delta
Tue, Feb 17 - Mon, Mar 2
ONT
Ontario
CNX
Chiang Mai
$792 Roundtrip, found 5 days ago
$792
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Feb 17 from Ontario to Chiang Mai, returning Mon, Mar 2, priced at $792 found 5 days ago
Korean Air
Wed, Dec 31 - Tue, Jan 20
ONT
Ontario
CNX
Chiang Mai
$798 Roundtrip, found 1 day ago
$798
Roundtrip
found 1 day ago
Select Korean Air flight, departing Wed, Dec 31 from Ontario to Chiang Mai, returning Tue, Jan 20, priced at $798 found 1 day ago
China Airlines
Mon, May 11 - Sat, May 23
ONT
Ontario
CNX
Chiang Mai
$806 Roundtrip, found 22 hours ago
$806
Roundtrip
found 22 hours ago
Select China Airlines flight, departing Mon, May 11 from Ontario to Chiang Mai, returning Sat, May 23, priced at $806 found 22 hours ago
Korean Air
Thu, Mar 19 - Tue, Mar 24
ONT
Ontario
CNX
Chiang Mai
$809 Roundtrip, found 1 day ago
$809
Roundtrip
found 1 day ago
Select Korean Air flight, departing Thu, Mar 19 from Ontario to Chiang Mai, returning Tue, Mar 24, priced at $809 found 1 day ago
Delta
Thu, Mar 19 - Tue, Mar 24
ONT
Ontario
CNX
Chiang Mai
$811 Roundtrip, found 1 day ago
$811
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Mar 19 from Ontario to Chiang Mai, returning Tue, Mar 24, priced at $811 found 1 day ago

Alternative airports near Chiang Mai

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

Select flight to Chiang Mai Intl. CNX. Cheapest and Closest option available. Average driving time to city center is 10 minutes. Flights from $1,468
CNX
Chiang Mai Intl.
CheapestClosest
Average driving time to city center10 min
Flights from $1,468
Flights from Ontario (ONT) to Chiang Mai (CNX)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Chiang Mai Intl.
Airlines serving
China Airlines, Delta, Korean Air
Roundtrip price
$709
Distance
8065 mi

Ontario to Chiang Mai Flights

The cheapest times to fly from Ontario to Chiang Mai

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 Ontario to Chiang Mai are during the month of March. You can find some of the cheapest flights from Ontario to Chiang Mai with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Chiang Mai

Sunday is one of the best days to book for cheap flights from Ontario to Chiang Mai: 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 Ontario to Chiang Mai

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 Ontario to Chiang Mai in 2025. You can also book with separate airlines for your outbound and return journeys, from $376 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 Ontario to Chiang Mai 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 Ontario to Chiang Mai 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.

 

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX) cost?
Snag a cheap one-way flight from $376 or cheap return flight from $709 from Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX)?
Traveling in March is a good way to save, as it's the cheapest month for flights between ONT and CNX. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest ONT to CNX flight.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX)?
You'll need to catch a flight with a layover if you're traveling from Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from ONT to CNX?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary 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 Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX)?
To land at Chiang Mai Intl. Airport (CNX) without delays, select a flight that takes off from Los Angeles - Ontario Intl. Airport (ONT) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX) last-minute?
Booking your plane ticket from ONT to CNX shortly before your trip is usually more expensive. But if there's some wiggle room with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book an ONT to CNX flight and hotel package?
Compared with arranging flights and hotels separately, booking an ONT to CNX flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one place will take the stress out of travel planning. Just pick your flights and select from our wide range of stays, then personalize your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Chiang Mai Intl. Airport (CNX)?
If you booked your ONT to CNX flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

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*Available to One Key members.