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Chiang Mai

$371+ Cheap flights from Ontario (ONT) to Chiang Mai (CNX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CNX
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Ontario to Chiang Mai

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Chiang Mai (CNX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$710
(Delta)

One-way from

$371
(Delta)

Popular in

December

Cheapest in

September

Average price

$842
From Ontario to Chiang Mai
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One-way flight from Ontario to Chiang Mai
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Highest demand for flights based on searches. 8% potential increase in price ($91 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Chiang Mai

Cheapest flights from Ontario to Chiang Mai
Explore the most affordable flight options available from Ontario to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Korean Air deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:00 amONT - CNX
2 stops25h 55mMultiple Airlines
Wed 9/2411:15 pmCNX - ONT
2 stops31h 45mMultiple Airlines
Deal found 9/10$764
This oojo deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/812:10 amONT - CNX
1 stop20h 10mChina Airlines
Fri 10/1711:20 amCNX - ONT
1 stop20h 40mChina Airlines
Deal found 9/10$846
This oojo deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1210:50 pmONT - CNX
1 stop20h 35mChina Airlines
Wed 2/1111:25 amCNX - ONT
1 stop20h 25mChina Airlines
Deal found 9/11$866
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/129:45 pmONT - CNX
2 stops30h 15mMultiple Airlines
Wed 2/1110:10 amCNX - ONT
2 stops21h 20mMultiple Airlines
Deal found 9/10$902
This FlightHub deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/111:10 pmONT - CNX
2 stops30h 00mMultiple Airlines
Wed 10/1510:10 amCNX - ONT
2 stops20h 55mMultiple Airlines
Deal found 9/11$926
This oojo deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/710:50 pmONT - CNX
1 stop20h 35mChina Airlines
Fri 12/1211:25 amCNX - ONT
1 stop20h 25mChina Airlines
Deal found 9/10$1,011

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Ontario to Chiang Mai that are best for you.

Fly from

Ontario

Fly to

Chiang Mai

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

$710

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 3/5

6:45 am-10:55 pm

2 stops25h 10m

Chiang Mai

Tue 3/10

12:15 am-10:38 pm

2 stops36h 23m

$715

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 1/28

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Thu 2/5

11:25 am-4:50 pm

1 stop20h 25m

$811

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 3/5

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Wed 3/11

11:25 am-5:50 pm

1 stop20h 25m

$813

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

$845

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 10/8

12:10 am-10:20 am

1 stop20h 10m

Chiang Mai

Fri 10/17

11:20 am-6:00 pm

1 stop20h 40m

$846

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Tue 1/27

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Fri 2/6

11:25 am-4:50 pm

1 stop20h 25m

$874

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

Sat 10/25

7:35 am-10:55 pm

2 stops25h 20m

$371

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sun 10/26

7:35 am-10:55 pm

2 stops25h 20m

$371

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 17 results
1
2

Best time to book a flight from Ontario to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Chiang Mai

What is the cheapest month to book a flight from Ontario to Chiang Mai?

Currently, September is the cheapest month in which you can book a flight from Ontario to Chiang Mai (average of $977). Flying from Ontario to Chiang Mai in June is currently the most expensive (average of $1,562). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Chiang Mai

Get insights into the airlines that provide service to Chiang Mai. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chiang Mai. Reviews last updated September 11, 2025.
Get a feel of what it's like to fly with China Airlines from Ontario to Chiang Mai by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
767 reviews

Entertainment

8.0

Crew

8.5

Boarding

8.3

Comfort

8.0

Overall

8.3

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
China Airlines
8.3
Very good
767 reviews
China Airlines
8.3
Very good
767 reviews

Entertainment

8.0

Crew

8.5

Boarding

8.3

Comfort

8.0

Overall

8.3

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Chiang Mai. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Chiang Mai?

    Delta, Korean Air, and China Airlines can get you from Ontario to Chiang Mai in just under 20h 35m. Your travel time can differ by up to 6h 20m. Ontario and Chiang Mai are separated by a distance of 8060 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Ontario to Chiang Mai round-trip?

    China Airlines, at $796, was found to be the cheapest airline from Ontario to Chiang Mai..

  • Can I find deals for flights from Ontario to Chiang Mai that include hotel bookings?

    Yes. In addition to deals on Ontario to Chiang Mai flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Chiang Mai?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Chiang Mai.

  • Can I find deals for business class flights from Ontario to Chiang Mai?

    Yes. Cheapflights offers flight deals from Ontario to Chiang Mai by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Chiang Mai?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Chiang Mai (average of $977). Flying from Ontario to Chiang Mai in June is currently the most expensive (average of $1,562). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top airline flying from Ontario to Chiang Mai

Discover the top airline that operate flights from Ontario to Chiang Mai. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$796Average$886FlexibilityNo cancel feeOn-time70%

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