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Chiang Mai

$313+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CNX
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap 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 December 12, 2025.

This Priceline deal was found by Cheapflights users on 12/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/156:40 amONT - CNX
2 stops25h 15mMultiple Airlines
Tue 1/274:55 pmCNX - ONT
1 stop37h 55mMultiple Airlines
Deal found 12/11$1,726
This FlightHub deal was found by Cheapflights users on 12/10. 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.
Mon 12/2910:50 pmONT - CNX
2 stops31h 10mMultiple Airlines
Tue 2/1011:25 amCNX - ONT
1 stop20h 25mMultiple Airlines
Deal found 12/10$1,990
This Justfly.com deal was found by Cheapflights users on 12/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:50 pmONT - CNX
1 stop20h 35mChina Airlines
Tue 2/1011:25 amCNX - ONT
1 stop20h 25mChina Airlines
Deal found 12/11$2,025
This Korean Air deal was found by Cheapflights users on 12/10. 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.
Thu 12/186:00 amONT - CNX
2 stops25h 55mKorean Air
Sun 12/2112:15 amCNX - ONT
2 stops31h 53mKorean Air
Deal found 12/10$2,229
This oojo deal was found by Cheapflights users on 12/10. 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.
Fri 12/1910:50 pmONT - CNX
1 stop20h 35mChina Airlines
Wed 12/2411:25 amCNX - ONT
1 stop20h 25mChina Airlines
Deal found 12/10$2,463
This oojo deal was found by Cheapflights users on 12/10. 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.
Thu 12/1810:50 pmONT - CNX
1 stop20h 35mChina Airlines
Mon 12/225:35 pmCNX - ONT
1 stop38h 15mChina Airlines
Deal found 12/10$2,477

Find 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$623
(Korean Air)

One-way from

$313
(Delta)

Popular in

December

Cheapest in

September

Average price

$1,515
Provider with most accurate pricing for Ontario-Chiang Mai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Chiang Mai flights.
Search Deals
From Ontario to Chiang Mai
Search Deals
One-way flight from Ontario to Chiang Mai
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($110 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 12, 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-10:33 pm

2 stops36h 18m

$623

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

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 1/28

10:50 pm-1:45 pm

2 stops23h 55m

Chiang Mai

Wed 2/11

11:25 am-4:50 pm

1 stop20h 25m

$848

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 1/28

3:30 pm-10:55 pm

2 stops40h 25m

Chiang Mai

Tue 2/10

12:15 am-10:44 pm

2 stops37h 29m

$871

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Tue 1/27

3:30 pm-10:55 pm

2 stops40h 25m

Chiang Mai

Tue 2/10

12:15 am-1:56 pm

2 stops28h 41m

$874

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 1/28

10:50 pm-10:25 am

1 stop20h 35m

Chiang Mai

Wed 2/11

11:25 am-4:50 pm

1 stop20h 25m

$937

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 2/9

6:00 am-10:55 pm

2 stops25h 55m

$313

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sat 2/7

10:50 pm-4:35 pm

1 stop26h 45m

$451

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sun 2/15

7:30 am-10:55 pm

2 stops24h 25m

$503

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 1/7

10:50 pm-11:35 pm

2 stops33h 45m

$507

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 16 results
1
2

Compare providers for flights from Ontario to Chiang Mai

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Chiang Mai in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Chiang Mai flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Chiang Mai flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Chiang Mai flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Chiang Mai flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Chiang Mai flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, February is the cheapest month in which you can book a flight from Ontario to Chiang Mai (average of $580). Flying from Ontario to Chiang Mai in July is currently the most expensive (average of $822). 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 December 12, 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
8.2
Very good
788 reviews

Entertainment

8.0

Food

7.8

Boarding

8.3

Comfort

8.0

Crew

8.5

Overall

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.
China Airlines
8.2
Very good
788 reviews
China Airlines
8.2
Very good
788 reviews

Entertainment

8.0

Food

7.8

Boarding

8.3

Comfort

8.0

Crew

8.5

Overall

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.

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?

    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, February is the cheapest month in which you can book a flight from Ontario to Chiang Mai (average of $580). Flying from Ontario to Chiang Mai in July is currently the most expensive (average of $822). 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.

See more FAQs

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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$796Average$923FlexibilityNo cancel feeOn-time70%

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