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

Korean Air, China Airlines, and EVA Air 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 46% 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 September 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.

$379 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

6:00 am - 9:55 pmONT-CNX

25h 55m2 stops

11:15 pm - 10:41 pmCNX-ONT

37h 26m2 stops

$710Delta

Find Deal

Sun, Sep 28 - Sun, Oct 5

6:00 am - 9:55 pmONT-CNX

25h 55m2 stops

11:15 pm - 10:41 pmCNX-ONT

37h 26m2 stops

$715Korean Air

Find Deal

Mon, Sep 29 - Mon, Oct 6

6:00 am - 9:55 pmONT-CNX

25h 55m2 stops

11:15 pm - 10:41 pmCNX-ONT

37h 26m2 stops

$765Korean Air

Find Deal

Mon, Sep 29 - Sun, Oct 5

6:00 am - 9:55 pmONT-CNX

25h 55m2 stops

11:15 pm - 11:39 pmCNX-ONT

38h 24m2 stops

$781Delta

Find Deal

Sun, Sep 28 - Tue, Oct 7

6:00 am - 9:55 pmONT-CNX

25h 55m2 stops

11:15 pm - 10:41 pmCNX-ONT

37h 26m2 stops

$786Korean Air

Find Deal

Mon, Sep 29 - Tue, Oct 7

10:50 pm - 10:25 amONT-CNX

20h 35m1 stop

5:35 pm - 4:50 pmCNX-ONT

38h 15m1 stop

$811China Airlines

Find Deal

Wed, Jan 28 - Mon, Feb 9

10:50 pm - 10:25 amONT-CNX

20h 35m1 stop

11:25 am - 4:50 pmCNX-ONT

20h 25m1 stop

$823China Airlines

Find Deal

Wed, Jan 7 - Sun, Jan 18

9:45 pm - 7:00 pmONT-CNX

30h 15m2 stops

10:10 am - 4:30 pmCNX-ONT

21h 20m2 stops

$902Multiple Airlines

Find Deal

Wed, Nov 12 - Wed, Feb 11

11:10 pm - 7:10 pmONT-CNX

30h 00m2 stops

10:10 am - 5:05 pmCNX-ONT

20h 55m2 stops

$939Multiple Airlines

Find Deal

Wed, Oct 1 - Fri, Oct 17

4:11 pm - 10:35 amONT-CNX

28h 24m2 stops

11:50 am - 11:32 pmCNX-ONT

26h 42m2 stops

$1,009EVA Air

Find Deal

Thu, Oct 30 - Thu, Nov 13

Delta flights from Ontario to Chiang Mai

Our best Delta deals on Ontario to Chiang Mai flight tickets

Delta

Sep 28

ONT6:00 amOntario

25h 55m

2 stops

CNX9:55 pmChiang Mai

Oct 5

CNX11:15 pmChiang Mai

37h 26m

2 stops

ONT10:41 pmOntario

$710

Find similar

Delta

Sep 28

ONT6:00 amOntario

25h 55m

2 stops

CNX9:55 pmChiang Mai

Oct 7

CNX11:15 pmChiang Mai

38h 24m

2 stops

ONT11:39 pmOntario

$781

Find similar

Delta

Nov 16

ONT1:20 pmOntario

42h 35m

2 stops

CNX10:55 pmChiang Mai

Nov 26

CNX12:15 amChiang Mai

33h 03m

2 stops

ONT6:18 pmOntario

$859

Find similar

Korean Air flights from Ontario to Chiang Mai

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

Korean Air

Sep 29

ONT6:00 amOntario

25h 55m

2 stops

CNX9:55 pmChiang Mai

Oct 6

CNX11:15 pmChiang Mai

37h 26m

2 stops

ONT10:41 pmOntario

$715

Find similar

Korean Air

Sep 29

ONT6:00 amOntario

25h 55m

2 stops

CNX9:55 pmChiang Mai

Oct 5

CNX11:15 pmChiang Mai

37h 26m

2 stops

ONT10:41 pmOntario

$765

Find similar

Korean Air

Sep 29

ONT6:00 amOntario

25h 55m

2 stops

CNX9:55 pmChiang Mai

Oct 7

CNX11:15 pmChiang Mai

37h 26m

2 stops

ONT10:41 pmOntario

$786

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sun 9/28

6:00 am-9:55 pm

2 stops25h 55m

Chiang Mai

Sun 10/5

11:15 pm-10:41 pm

2 stops37h 26m

$710

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 9/29

6:00 am-9:55 pm

2 stops25h 55m

Chiang Mai

Mon 10/6

11:15 pm-10:41 pm

2 stops37h 26m

$715

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 9/29

6:00 am-9:55 pm

2 stops25h 55m

Chiang Mai

Sun 10/5

11:15 pm-10:41 pm

2 stops37h 26m

$765

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sun 9/28

6:00 am-9:55 pm

2 stops25h 55m

Chiang Mai

Tue 10/7

11:15 pm-11:39 pm

2 stops38h 24m

$781

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 9/29

6:00 am-9:55 pm

2 stops25h 55m

Chiang Mai

Tue 10/7

11:15 pm-10:41 pm

2 stops37h 26m

$786

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 1/28

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Mon 2/9

5:35 pm-4:50 pm

1 stop38h 15m

$811

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 1/7

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Sun 1/18

11:25 am-4:50 pm

1 stop20h 25m

$823

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 11/12

9:45 pm-7:00 pm

2 stops30h 15m

Chiang Mai

Wed 2/11

10:10 am-4:30 pm

2 stops21h 20m

$902

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 10/1

11:10 pm-7:10 pm

2 stops30h 00m

Chiang Mai

Fri 10/17

10:10 am-5:05 pm

2 stops20h 55m

$939

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 10/30

4:11 pm-10:35 am

2 stops28h 24m

Chiang Mai

Thu 11/13

11:50 am-11:32 pm

2 stops26h 42m

$1,009

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 September 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 8.3 767 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.