HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chiang Mai

$434+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CNX
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
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 julio 30, 2025.

Round-trip from

$836
(Delta)

One-way from

$434
(Delta)

Popular in

December

Cheapest in

March

Average price

$1,244
From Ontario to Chiang Mai
Search Deals
One-way flight from Ontario to Chiang Mai
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($110 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($51 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 julio 30, 2025.

This Delta deal was found by Cheapflights users on 7/30. 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.
sáb. 9/135:40 pmONT - CNX
2 stops38h 15mDelta
sáb. 9/2011:15 pmCNX - ONT
2 stops37h 25mDelta
Deal found 7/30$836
This FlightHub deal was found by Cheapflights users on 7/29. 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.
dom. 8/1712:45 amONT - CNX
1 stop19h 35mChina Airlines
vie. 9/1211:20 amCNX - ONT
1 stop21h 20mChina Airlines
Deal found 7/29$862
This Korean Air deal was found by Cheapflights users on 7/29. 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.
mié. 11/126:43 amONT - CNX
2 stops25h 22mKorean Air
mar. 2/1012:15 amCNX - ONT
2 stops37h 23mKorean Air
Deal found 7/29$869
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/129:45 pmONT - CNX
2 stops30h 15mMultiple Airlines
mié. 2/1110:10 amCNX - ONT
2 stops20h 40mMultiple Airlines
Deal found 7/30$902
This Qatar Airways deal was found by Cheapflights users on 7/29. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/126:00 amONT - CNX
3 stops46h 00mQatar Airways
mié. 2/117:45 pmCNX - ONT
3 stops41h 52mQatar Airways
Deal found 7/29$1,897

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 julio 30, 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

sáb. 9/13

5:40 pm-9:55 pm

2 stops38h 15m

Chiang Mai

sáb. 9/20

11:15 pm-10:40 pm

2 stops37h 25m

$836

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

dom. 8/17

12:45 am-10:20 am

1 stop19h 35m

Chiang Mai

vie. 9/12

11:20 am-6:40 pm

1 stop21h 20m

$862

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

mié. 11/12

6:43 am-11:05 pm

2 stops25h 22m

Chiang Mai

mar. 2/10

12:15 am-10:38 pm

2 stops37h 23m

$869

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

mié. 11/12

9:45 pm-7:00 pm

2 stops30h 15m

Chiang Mai

mié. 2/11

10:10 am-3:50 pm

2 stops20h 40m

$902

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

mié. 11/12

6:00 am-7:00 pm

3 stops46h 00m

Chiang Mai

mié. 2/11

7:45 pm-10:37 pm

3 stops41h 52m

$1,897

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

dom. 1/25

6:55 pm-10:35 am

2 stops24h 40m

Chiang Mai

sáb. 2/7

11:50 am-10:37 pm

2 stops25h 47m

$5,839

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

mar. 9/2

6:00 am-9:55 pm

2 stops25h 55m

$434

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

mar. 8/12

6:00 am-9:55 pm

2 stops25h 55m

$437

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

vie. 9/26

12:10 am-10:20 am

1 stop20h 10m

$516

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

sáb. 9/27

11:10 pm-7:10 pm

2 stops30h 00m

$530

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 12 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, 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 $1,624). 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 julio 30, 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
1,222 reviews

Boarding

8.4

Crew

8.6

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
EVA Air
8.4
Very good
1,222 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Crew

8.6

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Korean Air
8.4
Very good
1,121 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Crew

8.6

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
China Airlines
8.3
Very good
754 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Crew

8.6

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Delta
8.0
Very good
7,980 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Crew

8.6

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Qatar Airways
7.4
Good
3,607 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Crew

8.6

Comfort

8.3

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

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?

    Delta, at $836, was found to be the cheapest airline from Ontario to Chiang Mai.Alternate airlines to your destination round-trip include China Airlines and Korean Air.

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $434. Korean Air flights start at $437 while deals on China Airlines start at $516 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 $1,624). 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
Santa Ana to Suvarnabhumi flights
Burbank to Suvarnabhumi flights
Los Angeles to Don Mueang Intl flights
Las Vegas to Suvarnabhumi flights
San Diego to Suvarnabhumi flights
San Jose to Suvarnabhumi flights
Oakland to Suvarnabhumi flights
San Francisco to Don Mueang Intl flights
Los Angeles to Phuket City flights
San Francisco to Phuket City flights
Santa Rosa to Suvarnabhumi flights
San Francisco to Chiang Mai flights
Ontario to Phuket City flights
Sacramento to Suvarnabhumi flights
Reno to Suvarnabhumi flights
Los Angeles to Chiang Mai flights
Medford to Suvarnabhumi flights
Burbank to Phuket City flights
Santa Ana to Phuket City flights
Las Vegas to Phuket City flights
Oakland to Phuket City flights
San Jose to Phuket City flights
Long Beach to Suvarnabhumi flights
San Francisco to Ko Samui flights
Las Vegas to Don Mueang Intl flights
Los Angeles to Ko Samui flights
San Diego to Don Mueang Intl flights
San Jose to Chiang Mai flights
Fresno to Suvarnabhumi flights
Palm Springs to Suvarnabhumi flights
Los Angeles to Krabi flights
Oakland to Chiang Mai flights
San Diego to Phuket City flights
San Francisco to Krabi flights
Ontario to Don Mueang Intl flights
Sacramento to Phuket City flights
Burbank to Chiang Mai flights
San Diego to Chiang Mai flights
Arcata to Suvarnabhumi flights
San Francisco to Rayong flights
Santa Ana to Chiang Mai flights
Long Beach to Phuket City flights
Monterey to Suvarnabhumi flights
San Jose to Don Mueang Intl 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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$796Average$886FlexibilityNo 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.