What is the cheapest airline that flies from Ontario to Chiang Mai?

Korean Air, Delta, and China Airlines are the most popular carriers operating from Ontario to Chiang Mai

What airlines fly to Chiang Mai?

Asiana Airlines, EVA Air and China Airlines are the top three most popular airlines that fly to Chiang Mai from Ontario according to our data. Asiana Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Chiang Mai. Keep in mind that there are 7 different airlines that fly to Chiang Mai on a routine basis, so you have a few additional options to choose from.

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 November 2025, 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.

$374 Cheap Flights from Ontario to Chiang Mai in 2025/26

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Find the cheapest flights from Ontario to Chiang Mai

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 10:55 pmONT-CNX

26h 55m2 stops

12:15 am - 10:38 pmCNX-ONT

36h 23m2 stops

$709Delta

Find Deal

Mon, Mar 9 - Wed, Mar 11

12:10 am - 10:20 amONT-CNX

20h 10m1 stop

11:20 am - 6:00 pmCNX-ONT

20h 40m1 stop

$747China Airlines

Find Deal

Wed, Apr 8 - Tue, Jun 9

10:50 pm - 10:25 amONT-CNX

20h 35m1 stop

11:25 am - 4:50 pmCNX-ONT

20h 25m1 stop

$779China Airlines

Find Deal

Tue, Jan 13 - Thu, Jan 22

6:38 am - 10:55 pmONT-CNX

25h 17m2 stops

12:15 am - 10:29 pmCNX-ONT

37h 14m2 stops

$788Korean Air

Find Deal

Wed, Dec 31 - Tue, Jan 27

12:10 am - 10:20 amONT-CNX

20h 10m1 stop

11:20 am - 6:00 pmCNX-ONT

20h 40m1 stop

$795China Airlines

Find Deal

Thu, Apr 9 - Tue, Jun 9

10:50 pm - 10:25 amONT-CNX

20h 35m1 stop

11:25 am - 4:50 pmCNX-ONT

20h 25m1 stop

$810China Airlines

Find Deal

Mon, Feb 16 - Thu, Feb 26

6:38 am - 10:55 pmONT-CNX

25h 17m2 stops

12:15 am - 10:29 pmCNX-ONT

37h 14m2 stops

$828Korean Air

Find Deal

Wed, Dec 31 - Fri, Jan 23

9:45 pm - 9:00 pmONT-CNX

32h 15m2 stops

10:10 am - 3:50 pmCNX-ONT

20h 40m2 stops

$858Multiple Airlines

Find Deal

Sat, Jan 17 - Wed, Feb 4

10:50 pm - 1:20 pmONT-CNX

23h 30m2 stops

11:25 am - 4:50 pmCNX-ONT

20h 25m1 stop

$863Multiple Airlines

Find Deal

Sat, Jan 17 - Wed, Feb 4

6:55 pm - 10:25 amONT-CNX

25h 30m2 stops

11:35 am - 11:09 amCNX-ONT

37h 34m2 stops

$1,155EVA Air

Find Deal

Thu, Apr 9 - Tue, Jun 9

China Airlines flights from Ontario to Chiang Mai

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

China Airlines

Apr 8

ONT12:10 amOntario

20h 10m

1 stop

CNX10:20 amChiang Mai

Jun 9

CNX11:20 amChiang Mai

20h 40m

1 stop

ONT6:00 pmOntario

$747

Find similar

China Airlines

Jan 13

ONT10:50 pmOntario

20h 35m

1 stop

CNX10:25 amChiang Mai

Jan 22

CNX11:25 amChiang Mai

20h 25m

1 stop

ONT4:50 pmOntario

$779

Find similar

China Airlines

Apr 9

ONT12:10 amOntario

20h 10m

1 stop

CNX10:20 amChiang Mai

Jun 9

CNX11:20 amChiang Mai

20h 40m

1 stop

ONT6:00 pmOntario

$795

Find similar

Delta flights from Ontario to Chiang Mai

Our best Delta deals on Ontario to Chiang Mai flight tickets

Delta

Mar 9

ONT6:00 amOntario

26h 55m

2 stops

CNX10:55 pmChiang Mai

Mar 11

CNX12:15 amChiang Mai

36h 23m

2 stops

ONT10:38 pmOntario

$709

Find similar

Delta

Jan 17

ONT3:30 pmOntario

40h 25m

2 stops

CNX10:55 pmChiang Mai

Feb 3

CNX12:15 amChiang Mai

37h 14m

2 stops

ONT10:29 pmOntario

$852

Find similar

Delta

Nov 12

ONT11:48 amOntario

44h 07m

2 stops

CNX10:55 pmChiang Mai

Feb 10

CNX12:15 amChiang Mai

37h 14m

2 stops

ONT10:29 pmOntario

$881

Find similar

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-10:38 pm

2 stops36h 23m

$709

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 4/8

12:10 am-10:20 am

1 stop20h 10m

Chiang Mai

Tue 6/9

11:20 am-6:00 pm

1 stop20h 40m

$747

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Tue 1/13

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Thu 1/22

11:25 am-4:50 pm

1 stop20h 25m

$779

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 12/31

6:38 am-10:55 pm

2 stops25h 17m

Chiang Mai

Tue 1/27

12:15 am-10:29 pm

2 stops37h 14m

$788

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 4/9

12:10 am-10:20 am

1 stop20h 10m

Chiang Mai

Tue 6/9

11:20 am-6:00 pm

1 stop20h 40m

$795

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 2/16

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Thu 2/26

11:25 am-4:50 pm

1 stop20h 25m

$810

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 12/31

6:38 am-10:55 pm

2 stops25h 17m

Chiang Mai

Fri 1/23

12:15 am-10:29 pm

2 stops37h 14m

$828

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sat 1/17

9:45 pm-9:00 pm

2 stops32h 15m

Chiang Mai

Wed 2/4

10:10 am-3:50 pm

2 stops20h 40m

$858

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sat 1/17

10:50 pm-1:20 pm

2 stops23h 30m

Chiang Mai

Wed 2/4

11:25 am-4:50 pm

1 stop20h 25m

$863

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 4/9

6:55 pm-10:25 am

2 stops25h 30m

Chiang Mai

Tue 6/9

11:35 am-11:09 am

2 stops37h 34m

$1,155

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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.

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

Direct flights	None

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?
As of November 2025, 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 $796	Free Cancellation	Rating 8.3 777 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.