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Cheap flights from Ontario to Chiang Mai from $413

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 2/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Korean Air Logo
6:00 am - 10:55 pm
ONT
-
CNX
26h 55m2 stops
Korean Air Logo
12:15 am - 5:12 pm
CNX
-
ONT
30h 57m2 stops
$623Korean Air
Mon, Mar 9 - Wed, Mar 11
Korean Air Logo
6:00 am - 10:55 pm
ONT
-
CNX
26h 55m2 stops
Korean Air Logo
12:15 am - 5:12 pm
CNX
-
ONT
30h 57m2 stops
$715Korean Air
Mon, Mar 9 - Wed, Mar 11
China Airlines Logo
10:50 pm - 4:35 pm
ONT
-
CNX
26h 45m1 stop
China Airlines Logo
11:25 am - 4:50 pm
CNX
-
ONT
20h 25m1 stop
$732China Airlines
Sat, Feb 28 - Thu, Mar 5
China Airlines Logo
10:50 pm - 4:35 pm
ONT
-
CNX
26h 45m1 stop
China Airlines Logo
11:25 am - 4:50 pm
CNX
-
ONT
20h 25m1 stop
$742China Airlines
Sat, Feb 28 - Fri, Mar 6
China Airlines Logo
10:50 pm - 10:25 am
ONT
-
CNX
20h 35m1 stop
China Airlines Logo
11:25 am - 5:50 pm
CNX
-
ONT
20h 25m1 stop
$762China Airlines
Thu, Mar 5 - Sun, Mar 15
Multiple Airlines Logo
7:30 am - 10:55 pm
ONT
-
CNX
24h 25m2 stops
Multiple Airlines Logo
12:15 am - 1:54 pm
CNX
-
ONT
28h 39m2 stops
$764Multiple Airlines
Sat, Feb 28 - Wed, Mar 4
China Airlines Logo
10:50 pm - 10:25 am
ONT
-
CNX
20h 35m1 stop
China Airlines Logo
5:35 pm - 5:50 pm
CNX
-
ONT
38h 15m1 stop
$776China Airlines
Mon, Feb 16 - Mon, Mar 16
Delta Logo
6:00 am - 10:55 pm
ONT
-
CNX
25h 55m2 stops
Delta Logo
12:15 am - 11:54 pm
CNX
-
ONT
37h 39m2 stops
$778Delta
Thu, Mar 5 - Sat, Mar 14
China Airlines Logo
11:50 pm - 10:25 am
ONT
-
CNX
20h 35m1 stop
China Airlines Logo
11:25 am - 5:50 pm
CNX
-
ONT
20h 25m1 stop
$806China Airlines
Mon, Mar 9 - Thu, Mar 12
China Airlines Logo
11:50 pm - 10:25 am
ONT
-
CNX
20h 35m1 stop
China Airlines Logo
11:25 am - 5:50 pm
CNX
-
ONT
20h 25m1 stop
$807China Airlines
Mon, Mar 9 - Thu, Mar 12

Korean Air flights from Ontario to Chiang Mai

Our best Korean Air deals on Ontario to Chiang Mai flight tickets
Korean Air
Mar 9
ONT6:00 amOntario
26h 55m
2 stops
CNX10:55 pmChiang Mai
Mar 11
CNX12:15 amChiang Mai
30h 57m
2 stops
ONT5:12 pmOntario
$623
Find similar
Korean Air
Mar 9
ONT6:00 amOntario
26h 55m
2 stops
CNX10:55 pmChiang Mai
Mar 11
CNX12:15 amChiang Mai
30h 57m
2 stops
ONT5:12 pmOntario
$715
Find similar

China Airlines flights from Ontario to Chiang Mai

Our best China Airlines deals on Ontario to Chiang Mai flight tickets
China Airlines
Feb 28
ONT10:50 pmOntario
26h 45m
1 stop
CNX4:35 pmChiang Mai
Mar 5
CNX11:25 amChiang Mai
20h 25m
1 stop
ONT4:50 pmOntario
$732
Find similar
China Airlines
Feb 28
ONT10:50 pmOntario
26h 45m
1 stop
CNX4:35 pmChiang Mai
Mar 6
CNX11:25 amChiang Mai
20h 25m
1 stop
ONT4:50 pmOntario
$742
Find similar
China Airlines
Mar 5
ONT10:50 pmOntario
20h 35m
1 stop
CNX10:25 amChiang Mai
Mar 15
CNX11:25 amChiang Mai
20h 25m
1 stop
ONT5:50 pmOntario
$762
Find similar

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 December 7, 2025.
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 3/9

6:00 am-10:55 pm

2 stops26h 55m

Chiang Mai

Wed 3/11

12:15 am-5:12 pm

2 stops30h 57m

$623

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/9

6:00 am-10:55 pm

2 stops26h 55m

Chiang Mai

Wed 3/11

12:15 am-5:12 pm

2 stops30h 57m

$715

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sat 2/28

10:50 pm-4:35 pm

1 stop26h 45m

Chiang Mai

Thu 3/5

11:25 am-4:50 pm

1 stop20h 25m

$732

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sat 2/28

10:50 pm-4:35 pm

1 stop26h 45m

Chiang Mai

Fri 3/6

11:25 am-4:50 pm

1 stop20h 25m

$742

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 3/5

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Sun 3/15

11:25 am-5:50 pm

1 stop20h 25m

$762

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sat 2/28

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

Wed 3/4

12:15 am-1:54 pm

2 stops28h 39m

$764

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 2/16

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Mon 3/16

5:35 pm-5:50 pm

1 stop38h 15m

$776

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 3/5

6:00 am-10:55 pm

2 stops25h 55m

Chiang Mai

Sat 3/14

12:15 am-11:54 pm

2 stops37h 39m

$778

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/9

11:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Thu 3/12

11:25 am-5:50 pm

1 stop20h 25m

$806

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 3/9

11:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Thu 3/12

11:25 am-5:50 pm

1 stop20h 25m

$807

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

What is the cheapest day to depart on your flight to Chiang Mai?

The cheapest day to depart from Ontario to Chiang Mai is on a Monday. Travelers who choose to depart for Chiang Mai on a Monday will often find tickets for as low as $909. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Chiang Mai for around $1,346.

What is the cheapest time of day to depart on your flight to Chiang Mai?

Flying to Chiang Mai from Ontario in the morning is the least expensive time of day to depart. momondo users have found prices as low as $887 when looking at flights departing in the morning. Flights to Chiang Mai are more costly in the evening, with an average ticket price of $1,104. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You could potentially save up to 40% 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 10m, 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
8.2
788 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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