HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Thailand

$513+ Cheap flights from Ontario (ONT) to Thailand

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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jun 10 — Jun 171
Wed 6/10
Wed 6/17
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Thailand 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 Thailand

Cheapest flights from Ontario to Thailand
Explore the most affordable flight options available from Ontario to Thailand. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 11, 2026.

This eDestinos deal was found by Cheapflights users on 5/7. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:00 am
ONT
-
BKK
2 stops28h 05m
Korean Air
Wed 9/99:40 pm
BKK
-
ONT
2 stops39h 00m
Korean Air
Deal found 5/7$835
This Delta deal was found by Cheapflights users on 5/7. 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.
Thu 10/296:00 am
ONT
-
BKK
2 stops25h 30m
Delta
Tue 11/39:40 am
BKK
-
ONT
2 stops22h 37m
Delta
Deal found 5/7$852
This Delta deal was found by Cheapflights users on 5/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/187:00 am
ONT
-
BKK
2 stops24h 45m
Delta
Sat 10/39:40 pm
BKK
-
ONT
2 stops33h 36m
Delta
Deal found 5/11$853
This Delta deal was found by Cheapflights users on 5/9. 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.
Wed 7/86:01 pm
ONT
-
BKK
2 stops37h 44m
Delta
Tue 9/89:50 am
BKK
-
ONT
2 stops26h 54m
Delta
Deal found 5/9$858
This Delta deal was found by Cheapflights users on 5/9. 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.
Thu 10/85:05 pm
ONT
-
BKK
2 stops40h 30m
Delta
Sat 10/249:50 am
BKK
-
ONT
2 stops26h 53m
Delta
Deal found 5/9$859
This Delta deal was found by Cheapflights users on 5/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/81:00 pm
ONT
-
BKK
2 stops44h 35m
Delta
Sat 10/319:40 am
BKK
-
ONT
2 stops40h 36m
Delta
Deal found 5/10$864
This Delta deal was found by Cheapflights users on 5/7. 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.
Thu 10/296:00 am
ONT
-
BKK
2 stops25h 30m
Delta
Wed 11/119:40 am
BKK
-
ONT
2 stops22h 37m
Delta
Deal found 5/7$877
This Delta deal was found by Cheapflights users on 5/8. 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.
Thu 10/86:00 am
ONT
-
BKK
2 stops29h 05m
Delta
Thu 10/299:40 am
BKK
-
ONT
2 stops21h 37m
Delta
Deal found 5/8$878
This Delta deal was found by Cheapflights users on 5/7. 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.
Fri 10/307:00 am
ONT
-
BKK
2 stops26h 20m
Delta
Tue 11/109:40 am
BKK
-
ONT
2 stops21h 32m
Delta
Deal found 5/7$882
This Delta deal was found by Cheapflights users on 5/8. 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.
Fri 10/27:00 am
ONT
-
BKK
2 stops28h 05m
Delta
Tue 10/279:40 am
BKK
-
ONT
2 stops21h 37m
Delta
Deal found 5/8$883
This Delta deal was found by Cheapflights users on 5/7. 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.
Mon 11/26:00 am
ONT
-
BKK
2 stops24h 30m
Delta
Wed 11/119:40 am
BKK
-
ONT
2 stops22h 37m
Delta
Deal found 5/7$902
This Delta deal was found by Cheapflights users on 5/9. 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.
Mon 10/127:00 am
ONT
-
BKK
2 stops24h 45m
Delta
Sat 10/179:50 am
BKK
-
ONT
2 stops21h 27m
Delta
Deal found 5/9$903

Find flight deals from Ontario to Thailand

Keep the following information in mind while searching for Ontario to Thailand flight deals. Data was last updated May 11, 2026.

Round-trip from

$835
(eDestinos)

One-way from

$513
(Delta)

Popular in

December

Cheapest in

March

Average price

$867
From Ontario to Thailand
Search Deals
One-way flight from Ontario to Thailand
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Thailand 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 May 11, 2026.
Use the filters below to find and compare flights from Ontario to Thailand that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 10/27

7:00 am-12:45 am

2 stops27h 45m

Bangkok Suvarnabhumi

Tue 11/3

9:40 am-5:17 pm

2 stops22h 37m

$903

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Mon 10/5

7:00 am-10:10 pm

2 stops25h 10m

Phuket City

Fri 10/23

11:25 pm-11:48 pm

2 stops38h 23m

$953

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Tue 11/3

7:00 am-10:55 pm

2 stops24h 55m

Chiang Mai

Mon 2/15

12:15 am-1:57 pm

2 stops28h 42m

$958

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 7/7

6:00 am-1:05 am

2 stops29h 05m

Bangkok Suvarnabhumi

Thu 9/10

9:50 am-10:40 pm

2 stops26h 50m

$973

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Mon 10/5

7:00 am-10:10 pm

2 stops25h 10m

Phuket City

Sat 10/17

11:25 pm-5:17 pm

2 stops31h 52m

$1,028

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Wed 10/28

7:00 am-10:10 pm

2 stops25h 10m

Phuket City

Sun 11/15

11:40 pm-5:17 pm

2 stops32h 37m

$1,052

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Sun 10/25

7:00 am-10:10 pm

2 stops25h 10m

Phuket City

Thu 11/12

11:40 pm-5:17 pm

2 stops32h 37m

$1,057

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 10/6

7:00 am-1:05 am

2 stops28h 05m

Bangkok Suvarnabhumi

Fri 10/23

9:50 am-5:17 pm

2 stops21h 27m

$1,058

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Tue 10/20

7:00 am-10:10 pm

2 stops25h 10m

Phuket City

Tue 10/27

11:40 pm-5:17 pm

2 stops31h 37m

$1,058

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Tue 10/20

7:00 am-10:10 pm

2 stops25h 10m

Phuket City

Sat 10/24

11:25 pm-5:17 pm

2 stops31h 52m

$1,058

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/10

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Ontario to Thailand

Have a flexible travel schedule? Discover the best time to fly to Thailand 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 Thailand

How far ahead should I book a flight from Ontario to Thailand?

The best time to book flights from Ontario to Thailand is 81 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, July is the cheapest month in which you can book a flight from Ontario to Thailand (average of $457). Flying from Ontario to Thailand in June is currently the most expensive (average of $906). 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 Thailand

Get insights into the airlines that provide service to Thailand. 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 Thailand. Reviews last updated May 11, 2026.
Peruse reviews from past customers who have flown with STARLUX Airlines,Korean Air, andChina Airlines from Ontario to Thailand to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
313 reviews

Crew

9.2

Comfort

8.9

Entertainment

8.8

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
STARLUX Airlines
8.9
Very good
313 reviews
STARLUX Airlines
8.9
Very good
313 reviews

Crew

9.2

Comfort

8.9

Entertainment

8.8

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
Korean Air
8.4
Very good
1,217 reviews
STARLUX Airlines
8.9
Very good
313 reviews

Crew

9.2

Comfort

8.9

Entertainment

8.8

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
China Airlines
8.3
Very good
826 reviews
STARLUX Airlines
8.9
Very good
313 reviews

Crew

9.2

Comfort

8.9

Entertainment

8.8

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
Delta
7.9
Good
8,447 reviews
STARLUX Airlines
8.9
Very good
313 reviews

Crew

9.2

Comfort

8.9

Entertainment

8.8

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again

Related info for your journey

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

  • What airport do you fly from for flights from Ontario to Thailand?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Thailand.

  • How long is the flight from Ontario to Thailand?

    A quick flight from Ontario to Thailand can take about 24h 22m. Delta provides one of the quickest options available for as low as $1,065. The distance between Ontario and Thailand is about 8280 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    One-way options have recently been found by users for as low as $316 on Korean Air. Other airlines that offer cheap prices include China Airlines from $398 and STARLUX Airlines from $445 one-way.

  • What are the most popular routes from Ontario to Thailand?

    Most travelers choose Ontario - Bangkok Suvarnabhumi, Ontario - Phuket City or Ontario - Chiang Mai when deciding on the best route from Ontario to Thailand.

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

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

  • How can I find direct flights from Ontario to Thailand?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Thailand 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 Thailand?

    Currently, July is the cheapest month in which you can book a flight from Ontario to Thailand (average of $457). Flying from Ontario to Thailand in June is currently the most expensive (average of $906). 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.

Top 4 airlines flying from Ontario to Thailand

Discover the top 4 airlines that operate flights from Ontario to Thailand. 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 May 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$457Average$660FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$616Average$788FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$717Average$1,158FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$763Average$824FlexibilityNo cancel feeOn-timeN/A

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.