$415 Cheap Flights from Ontario to Chiang Mai in 2026/27 | momondo

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Find the cheapest flights from Ontario to Chiang Mai

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:20 am - 10:45 pmONT Ontario-CNX Chiang Mai

26h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 11:00 pmCNX Chiang Mai-ONT Ontario

37h 40m2 stops Incheon Intl Seattle/Tacoma Intl

$827Korean Air

Thu, Oct 29 - Mon, Nov 16

6:20 am - 10:45 pmONT Ontario-CNX Chiang Mai

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 5:16 pmCNX Chiang Mai-ONT Ontario

31h 56m2 stops Incheon Intl Seattle/Tacoma Intl

$827Korean Air

Wed, Nov 4 - Tue, Nov 10

6:20 am - 10:45 pmONT Ontario-CNX Chiang Mai

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 11:00 pmCNX Chiang Mai-ONT Ontario

37h 40m2 stops Incheon Intl Seattle/Tacoma Intl

$827Korean Air

Wed, Nov 4 - Wed, Nov 18

6:20 am - 10:45 pmONT Ontario-CNX Chiang Mai

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 10:43 pmCNX Chiang Mai-ONT Ontario

37h 23m2 stops Incheon Intl Seattle/Tacoma Intl

$827Korean Air

Mon, Nov 2 - Wed, Nov 4

6:20 am - 10:45 pmONT Ontario-CNX Chiang Mai

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 5:16 pmCNX Chiang Mai-ONT Ontario

31h 56m2 stops Incheon Intl Seattle/Tacoma Intl

$827Korean Air

Wed, Nov 4 - Tue, Nov 17

6:20 am - 10:45 pmONT Ontario-CNX Chiang Mai

25h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 5:16 pmCNX Chiang Mai-ONT Ontario

31h 56m2 stops Incheon Intl Seattle/Tacoma Intl

$839Korean Air

Wed, Nov 4 - Thu, Nov 19

6:20 am - 10:45 pmONT Ontario-CNX Chiang Mai

49h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 5:16 pmCNX Chiang Mai-ONT Ontario

31h 56m2 stops Incheon Intl Seattle/Tacoma Intl

$846Korean Air

Thu, Nov 5 - Tue, Nov 17

6:20 am - 10:45 pmONT Ontario-CNX Chiang Mai

49h 25m2 stops Seattle/Tacoma Intl Incheon Intl

12:20 am - 11:00 pmCNX Chiang Mai-ONT Ontario

37h 40m2 stops Incheon Intl Seattle/Tacoma Intl

$846Korean Air

Thu, Nov 5 - Wed, Nov 18

10:50 pm - 10:25 amONT Ontario-CNX Chiang Mai

20h 35m1 stop Taipei City Taiwan Taoyuan Intl

11:25 am - 5:05 pmCNX Chiang Mai-ONT Ontario

20h 40m1 stop Taipei City Taiwan Taoyuan Intl

$907China Airlines

Tue, Feb 23 - Thu, Mar 4

11:50 pm - 10:25 amONT Ontario-CNX Chiang Mai

20h 35m1 stop Taipei City Taiwan Taoyuan Intl

11:20 am - 6:00 pmCNX Chiang Mai-ONT Ontario

20h 40m1 stop Taipei City Taiwan Taoyuan Intl

$921China Airlines

Sat, Mar 20 - Tue, Apr 20

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Korean Air flights from Ontario to Chiang Mai

Our best Korean Air deals on Ontario to Chiang Mai flight tickets

Korean Air

Nov 4

ONT6:20 amOntario

25h 25m

2 stops

CNX10:45 pmChiang Mai

Nov 18

CNX12:20 amChiang Mai

37h 40m

2 stops

ONT11:00 pmOntario

$827

Korean Air

Nov 4

ONT6:20 amOntario

25h 25m

2 stops

CNX10:45 pmChiang Mai

Nov 19

CNX12:20 amChiang Mai

31h 56m

2 stops

ONT5:16 pmOntario

$839

Korean Air

Nov 5

ONT6:20 amOntario

49h 25m

2 stops

CNX10:45 pmChiang Mai

Nov 17

CNX12:20 amChiang Mai

31h 56m

2 stops

ONT5:16 pmOntario

$846

STARLUX Airlines flights from Ontario to Chiang Mai

Our best STARLUX Airlines deals on Ontario to Chiang Mai flight tickets

STARLUX Airlines

Jan 5

ONT9:45 pmOntario

27h 15m

1 stop

CNX4:00 pmChiang Mai

Feb 4

CNX5:00 pmChiang Mai

37h 55m

1 stop

ONT3:55 pmOntario

$1,006

STARLUX Airlines

Jan 5

ONT9:45 pmOntario

27h 15m

1 stop

CNX4:00 pmChiang Mai

Feb 2

CNX5:00 pmChiang Mai

37h 55m

1 stop

ONT3:55 pmOntario

$1,015

STARLUX Airlines

Jan 8

ONT9:45 pmOntario

27h 15m

1 stop

CNX4:00 pmChiang Mai

Feb 4

CNX5:00 pmChiang Mai

37h 55m

1 stop

ONT3:55 pmOntario

$1,063

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Thu 10/29

6:20 am-10:45 pm

2 stops26h 25m

Chiang Mai

Mon 11/16

12:20 am-11:00 pm

2 stops37h 40m

$827

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Wed 11/4

6:20 am-10:45 pm

2 stops25h 25m

Chiang Mai

Tue 11/10

12:20 am-5:16 pm

2 stops31h 56m

$827

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Wed 11/4

6:20 am-10:45 pm

2 stops25h 25m

Chiang Mai

Wed 11/18

12:20 am-11:00 pm

2 stops37h 40m

$827

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Mon 11/2

6:20 am-10:45 pm

2 stops25h 25m

Chiang Mai

Wed 11/4

12:20 am-10:43 pm

2 stops37h 23m

$827

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Wed 11/4

6:20 am-10:45 pm

2 stops25h 25m

Chiang Mai

Tue 11/17

12:20 am-5:16 pm

2 stops31h 56m

$827

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Wed 11/4

6:20 am-10:45 pm

2 stops25h 25m

Chiang Mai

Thu 11/19

12:20 am-5:16 pm

2 stops31h 56m

$839

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Thu 11/5

6:20 am-10:45 pm

2 stops49h 25m

Chiang Mai

Tue 11/17

12:20 am-5:16 pm

2 stops31h 56m

$846

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Thu 11/5

6:20 am-10:45 pm

2 stops49h 25m

Chiang Mai

Wed 11/18

12:20 am-11:00 pm

2 stops37h 40m

$846

Quickest round-trip

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Tue 2/23

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Thu 3/4

11:25 am-5:05 pm

1 stop20h 40m

$907

OntarioChiang Mai

ONT Ontario - CNX Chiang Mai

ONTCNX

Ontario

Sat 3/20

11:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Tue 4/20

11:20 am-6:00 pm

1 stop20h 40m

$921

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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How to get the cheapest flight ticket from Ontario to Chiang Mai

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Can stopping save me money on Ontario to Chiang Mai flights?

You could potentially save up to 29% on your flight if you consider stops on a Ontario to Chiang Mai flight.

When to book flights from Ontario to Chiang Mai

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Chiang Mai according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Chiang Mai (ONT to CNX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Chiang Mai

Best Price Found	$415
Fastest flight time	20h 35m
Direct flights	None

The best one-way flight to Chiang Mai from Ontario in the past 72 hours is $415. The best round-trip flight deal from Ontario to Chiang Mai found on momondo in the last 72 hours is $827.

The fastest flight from Ontario to Chiang Mai takes 20h 35m

There are no direct flights from Ontario to Chiang Mai. There are no popular flight routes from Ontario to Chiang Mai.

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Frequently asked questions about flying from Ontario to Chiang Mai

How far is Ontario to Chiang Mai by plane?
Ontario and Chiang Mai are 8055.9 mi apart from one another. Flights usually cover this in 20h 35m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Ontario Airport to Chiang Mai Airport?
Prices for flights from Ontario Airport to Chiang Mai Airport were last updated today.
How many operators does momondo search for flights from Ontario Airport to Chiang Mai Airport?
As of September 2026, there is 1 operator available to choose from for flights from Ontario Airport to Chiang Mai Airport.
How old do you have to be to fly from Ontario Airport to Chiang Mai Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Chiang Mai Airport.
What documentation or ID do you need to fly to Chiang Mai Airport?
The travel and health documents required for your trip to Chiang Mai Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Chiang Mai Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Ontario to Chiang Mai?
Based on momondo bookings for flights between Ontario and Chiang Mai, the leading airline is China Airlines, making up 100% of the total bookings.

Best airlines flying from Ontario to Chiang Mai

Compare and see reviews for airlines that fly from Ontario to Chiang Mai with momondo

Airline	Rating	Free Cancellation	Price
China Airlines	PriceFrom $742	Free Cancellation	Rating 8.3 847 reviews		Search China Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Chiang Mai?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Chiang Mai. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Chiang Mai with flexible booking policies on momondo?

Flights from Ontario to Chiang Mai with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Chiang Mai?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Chiang Mai.

I’m not ready to book a flight from Ontario to Chiang Mai right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Chiang Mai from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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