HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chiang Mai

$437+ 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CNX
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Chiang Mai with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 3, 2025.

Round-trip from

$825
(Korean Air)

One-way from

$437
(Korean Air)

Popular in

December

Cheapest in

August

Average price

$1,240
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 ($114 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 3, 2025.

This Korean Air deal was found by Cheapflights users on 7/1. 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.
Fri 8/296:00 amONT - CNX
2 stops25h 55mKorean Air
Sun 9/2811:15 pmCNX - ONT
2 stops31h 45mKorean Air
Deal found 7/1$825
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/226:25 amONT - CNX
2 stops25h 30mDelta
Mon 7/2811:15 pmCNX - ONT
2 stops38h 27mDelta
Deal found 6/30$864
This oojo deal was found by Cheapflights users on 7/1. 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 8/3112:45 amONT - CNX
1 stop19h 35mChina Airlines
Sat 9/2011:20 amCNX - ONT
1 stop20h 40mChina Airlines
Deal found 7/1$866
This Korean Air deal was found by Cheapflights users on 7/2. 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.
Sat 8/166:05 pmONT - CNX
2 stops37h 50mMultiple Airlines
Sat 8/2311:15 pmCNX - ONT
2 stops31h 56mMultiple Airlines
Deal found 7/2$943

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 July 3, 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

Fri 8/29

6:00 am-9:55 pm

2 stops25h 55m

Chiang Mai

Sun 9/28

11:15 pm-5:00 pm

2 stops31h 45m

$825

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Tue 7/22

6:25 am-9:55 pm

2 stops25h 30m

Chiang Mai

Mon 7/28

11:15 pm-11:42 pm

2 stops38h 27m

$864

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sun 8/31

12:45 am-10:20 am

1 stop19h 35m

Chiang Mai

Sun 9/28

11:20 am-6:00 pm

1 stop20h 40m

$866

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Sat 8/16

6:05 pm-9:55 pm

2 stops37h 50m

Chiang Mai

Sat 8/23

11:15 pm-5:11 pm

2 stops31h 56m

$943

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 9/18

6:00 am-9:55 pm

2 stops25h 55m

$437

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 9/17

12:10 am-10:20 am

1 stop20h 10m

$490

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 7/16

6:00 am-9:55 pm

2 stops25h 55m

$513

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Thu 9/18

7:40 pm-10:25 am

2 stops24h 45m

$639

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 9/17

12:10 am-2:50 pm

2 stops24h 40m

$661

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Wed 7/16

12:00 pm-9:20 am

3 stops31h 20m

$1,111

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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, April is the cheapest month in which you can book a flight from Ontario to Chiang Mai (average of $1,010). Flying from Ontario to Chiang Mai in December is currently the most expensive (average of $1,639). 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 July 3, 2025.
Get a feel of what it's like to fly with EVA Air, Korean Air, and 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.
EVA Air
8.4
Very good
1,214 reviews

Entertainment

8.0

Overall

8.4

Comfort

8.3

Crew

8.6

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
EVA Air
8.4
Very good
1,214 reviews
EVA Air
8.4
Very good
1,214 reviews

Entertainment

8.0

Overall

8.4

Comfort

8.3

Crew

8.6

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Korean Air
8.4
Very good
1,101 reviews
EVA Air
8.4
Very good
1,214 reviews

Entertainment

8.0

Overall

8.4

Comfort

8.3

Crew

8.6

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
China Airlines
8.3
Very good
747 reviews
EVA Air
8.4
Very good
1,214 reviews

Entertainment

8.0

Overall

8.4

Comfort

8.3

Crew

8.6

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Delta
8.0
Very good
7,970 reviews
EVA Air
8.4
Very good
1,214 reviews

Entertainment

8.0

Overall

8.4

Comfort

8.3

Crew

8.6

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Qatar Airways
7.4
Good
3,588 reviews
EVA Air
8.4
Very good
1,214 reviews

Entertainment

8.0

Overall

8.4

Comfort

8.3

Crew

8.6

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

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.

  • What are the cheapest airlines flying from Ontario to Chiang Mai round-trip?

    Korean Air, at $825, was found to be the cheapest airline from Ontario to Chiang Mai.Alternate airlines to your destination round-trip include Delta and China Airlines.

  • What are the cheapest airlines to fly from Ontario to Chiang Mai one-way?

    To fly one-way, consider booking your trip with Korean Air, which is currently one of the cheapest options available, starting at $437. China Airlines flights start at $490 while deals on Delta start at $513 one-way.

  • 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, April is the cheapest month in which you can book a flight from Ontario to Chiang Mai (average of $1,010). Flying from Ontario to Chiang Mai in December is currently the most expensive (average of $1,639). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Chiang Mai

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Suvarnabhumi flights
San Francisco to Suvarnabhumi flights
Ontario to Suvarnabhumi flights
Los Angeles to Don Mueang Intl flights
Santa Ana to Suvarnabhumi flights
San Jose to Suvarnabhumi flights
Burbank to Suvarnabhumi flights
Oakland to Suvarnabhumi flights
San Francisco to Don Mueang Intl flights
San Diego to Suvarnabhumi flights
Las Vegas to Suvarnabhumi flights
Los Angeles to Phuket City flights
Santa Rosa to Suvarnabhumi flights
San Francisco to Chiang Mai flights
San Francisco to Phuket City flights
Los Angeles to Chiang Mai flights
Ontario to Phuket City flights
Sacramento to Suvarnabhumi flights
Burbank to Phuket City flights
Reno to Suvarnabhumi flights
Medford to Suvarnabhumi flights
Santa Ana to Phuket City flights
San Jose to Phuket City flights
San Diego to Don Mueang Intl flights
Long Beach to Suvarnabhumi flights
San Jose to Chiang Mai flights
Las Vegas to Phuket City flights
Oakland to Phuket City flights
San Francisco to Ko Samui flights
Los Angeles to Ko Samui flights
Fresno to Suvarnabhumi flights
Ontario to Don Mueang Intl flights
Las Vegas to Don Mueang Intl flights
Los Angeles to Krabi flights
Long Beach to Phuket City flights
San Diego to Phuket City flights
Santa Ana to Chiang Mai flights
San Francisco to Krabi flights
Burbank to Chiang Mai flights
Oakland to Chiang Mai flights
Arcata to Suvarnabhumi flights
Palm Springs to Suvarnabhumi flights
Santa Ana to Krabi flights
Las Vegas to Chiang Mai flights
San Francisco to Rayong flights
Sacramento to Phuket City flights

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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$796Average$923FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.