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Cheap flights from Ontario to Chiang Mai from $366

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Chiang Mai departing on 3/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Chiang Mai

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:30 am - 10:55 pm
ONT
-
CNX
24h 25m
2 stops
Delta Logo
12:15 am - 10:33 pm
CNX
-
ONT
36h 18m
2 stops
$736Delta
Mon, Mar 2 - Tue, Mar 10
Delta Logo
7:30 am - 10:55 pm
ONT
-
CNX
24h 25m
2 stops
Delta Logo
12:15 am - 5:12 pm
CNX
-
ONT
30h 57m
2 stops
$739Delta
Mon, Mar 2 - Thu, Mar 12
Korean Air Logo
7:30 am - 10:55 pm
ONT
-
CNX
24h 25m
2 stops
Korean Air Logo
12:15 am - 10:33 pm
CNX
-
ONT
36h 18m
2 stops
$744Korean Air
Mon, Mar 2 - Mon, Mar 9
Korean Air Logo
7:30 am - 10:55 pm
ONT
-
CNX
24h 25m
2 stops
Korean Air Logo
12:15 am - 1:54 pm
CNX
-
ONT
28h 39m
2 stops
$745Korean Air
Mon, Mar 2 - Thu, Mar 5
Delta Logo
7:30 am - 10:55 pm
ONT
-
CNX
24h 25m
2 stops
Delta Logo
12:15 am - 1:54 pm
CNX
-
ONT
28h 39m
2 stops
$786Delta
Mon, Mar 2 - Wed, Mar 4
Delta Logo
7:30 am - 10:55 pm
ONT
-
CNX
24h 25m
2 stops
Delta Logo
12:15 am - 10:33 pm
CNX
-
ONT
36h 18m
2 stops
$789Delta
Mon, Mar 2 - Wed, Mar 11
Multiple Airlines Logo
11:10 pm - 7:10 pm
ONT
-
CNX
30h 00m
2 stops
Multiple Airlines Logo
10:10 am - 5:05 pm
CNX
-
ONT
20h 55m
2 stops
$793Multiple Airlines
Wed, Apr 8 - Wed, Apr 29
Korean Air Logo
7:30 am - 10:55 pm
ONT
-
CNX
24h 25m
2 stops
Korean Air Logo
12:15 am - 5:12 pm
CNX
-
ONT
30h 57m
2 stops
$794Korean Air
Mon, Mar 2 - Mon, Mar 9
China Airlines Logo
12:10 am - 10:20 am
ONT
-
CNX
20h 10m
1 stop
China Airlines Logo
11:20 am - 6:00 pm
CNX
-
ONT
20h 40m
1 stop
$795China Airlines
Wed, Apr 8 - Sun, May 31
China Airlines Logo
12:10 am - 10:20 am
ONT
-
CNX
20h 10m
1 stop
China Airlines Logo
11:20 am - 6:00 pm
CNX
-
ONT
20h 40m
1 stop
$798China Airlines
Tue, Apr 7 - Wed, Apr 29

Korean Air flights from Ontario to Chiang Mai

Our best Korean Air deals on Ontario to Chiang Mai flight tickets
Korean Air
Mar 2
ONT7:30 amOntario
24h 25m
2 stops
CNX10:55 pmChiang Mai
Mar 9
CNX12:15 amChiang Mai
36h 18m
2 stops
ONT10:33 pmOntario
$744
Korean Air
Mar 2
ONT7:30 amOntario
24h 25m
2 stops
CNX10:55 pmChiang Mai
Mar 5
CNX12:15 amChiang Mai
28h 39m
2 stops
ONT1:54 pmOntario
$745
Korean Air
Mar 2
ONT7:30 amOntario
24h 25m
2 stops
CNX10:55 pmChiang Mai
Mar 9
CNX12:15 amChiang Mai
30h 57m
2 stops
ONT5:12 pmOntario
$794

Delta flights from Ontario to Chiang Mai

Our best Delta deals on Ontario to Chiang Mai flight tickets
Delta
Mar 2
ONT7:30 amOntario
24h 25m
2 stops
CNX10:55 pmChiang Mai
Mar 10
CNX12:15 amChiang Mai
36h 18m
2 stops
ONT10:33 pmOntario
$736
Delta
Mar 2
ONT7:30 amOntario
24h 25m
2 stops
CNX10:55 pmChiang Mai
Mar 12
CNX12:15 amChiang Mai
30h 57m
2 stops
ONT5:12 pmOntario
$739
Delta
Mar 2
ONT7:30 amOntario
24h 25m
2 stops
CNX10:55 pmChiang Mai
Mar 4
CNX12:15 amChiang Mai
28h 39m
2 stops
ONT1:54 pmOntario
$786

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Chiang Mai 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, momondo users made 832,500 searches. Data last updated February 5, 2026.
Use the filters below to find and compare flights from Ontario to Chiang Mai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/2

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

Tue 3/10

12:15 am-10:33 pm

2 stops36h 18m

$736

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/2

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

Thu 3/12

12:15 am-5:12 pm

2 stops30h 57m

$739

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/2

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

Mon 3/9

12:15 am-10:33 pm

2 stops36h 18m

$744

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/2

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

Thu 3/5

12:15 am-1:54 pm

2 stops28h 39m

$745

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/2

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

Wed 3/4

12:15 am-1:54 pm

2 stops28h 39m

$786

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/2

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

Wed 3/11

12:15 am-10:33 pm

2 stops36h 18m

$789

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 4/8

11:10 pm-7:10 pm

2 stops30h 00m

Chiang Mai

Wed 4/29

10:10 am-5:05 pm

2 stops20h 55m

$793

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/2

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

Mon 3/9

12:15 am-5:12 pm

2 stops30h 57m

$794

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 4/8

12:10 am-10:20 am

1 stop20h 10m

Chiang Mai

Sun 5/31

11:20 am-6:00 pm

1 stop20h 40m

$795

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Tue 4/7

12:10 am-10:20 am

1 stop20h 10m

Chiang Mai

Wed 4/29

11:20 am-6:00 pm

1 stop20h 40m

$798

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chiang Mai from

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

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

You could potentially save up to 57% 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

Fastest flight time

20h 35m

Direct flights

None
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.
Search flight deals

  • 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?

  • 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?

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 AirlinesPriceFrom $796Free CancellationRating
8.3
803 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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