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$313+ 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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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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 December 12, 2025.

This oojo deal was found by Cheapflights users on 12/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:50 pmONT - BKK
1 stop23h 15mChina Airlines
Sat 2/75:50 pmBKK - ONT
1 stop38h 00mChina Airlines
Deal found 12/9$990
This flugladen.de 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:50 pmONT - BKK
1 stop20h 00mMultiple Airlines
Wed 1/141:45 pmBKK - ONT
1 stop17h 05mMultiple Airlines
Deal found 12/11$998
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:50 pmONT - BKK
1 stop20h 00mChina Airlines
Wed 3/1110:55 amBKK - ONT
1 stop20h 55mChina Airlines
Deal found 12/11$1,075
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:12 pmONT - BKK
3 stops42h 38mMultiple Airlines
Sat 2/71:45 pmBKK - ONT
1 stop17h 05mMultiple Airlines
Deal found 12/9$1,160
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:50 pmONT - BKK
1 stop20h 00mChina Airlines
Fri 1/162:35 amBKK - ONT
1 stop29h 15mChina Airlines
Deal found 12/11$1,194
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:50 pmONT - BKK
1 stop20h 00mChina Airlines
Sat 1/1710:55 amBKK - ONT
1 stop20h 55mChina Airlines
Deal found 12/11$1,200
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:00 amONT - BKK
2 stops32h 10mUnited Airlines
Thu 1/224:55 pmBKK - ONT
2 stops39h 48mUnited Airlines
Deal found 12/11$1,209
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:42 amONT - BKK
2 stops57h 43mUnited Airlines
Wed 3/114:55 pmBKK - ONT
2 stops20h 02mUnited Airlines
Deal found 12/11$1,264
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:50 pmONT - BKK
1 stop35h 45mChina Airlines
Sun 2/15:50 pmBKK - ONT
1 stop38h 00mChina Airlines
Deal found 12/11$1,312
This Korean Air 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:38 amONT - HKT
2 stops24h 32mKorean Air
Sat 1/1011:30 pmHKT - ONT
2 stops29h 26mKorean Air
Deal found 12/11$1,568
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:38 amONT - HKT
2 stops24h 32mDelta
Thu 1/811:40 pmHKT - ONT
2 stops29h 16mDelta
Deal found 12/11$1,653
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:38 amONT - HKT
2 stops24h 32mDelta
Sat 1/1011:40 pmHKT - ONT
2 stops29h 16mDelta
Deal found 12/11$1,713

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 December 12, 2025.

Round-trip from

$623
(Korean Air)

One-way from

$313
(Delta)

Popular in

June

Cheapest in

October

Average price

$1,102
From Ontario to Thailand
Search Deals
One-way flight from Ontario to Thailand
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($160 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 12, 2025.
Use the filters below to find and compare flights from Ontario to Thailand that are best for you.

Fly from

Ontario

Fly to

Thailand

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

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Thu 4/16

7:00 am-10:10 pm

2 stops25h 10m

Phuket City

Thu 4/30

11:25 pm-5:16 pm

2 stops31h 51m

$719

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 5/4

6:00 am-11:55 pm

2 stops27h 55m

Bangkok Suvarnabhumi

Wed 5/13

9:35 am-10:52 pm

2 stops27h 17m

$726

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 3/5

6:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Mon 3/16

9:40 am-10:34 pm

2 stops26h 54m

$731

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 3/5

6:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Wed 3/18

9:40 am-10:34 pm

2 stops26h 54m

$731

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 5/1

6:00 am-9:45 am

2 stops37h 45m

Bangkok Suvarnabhumi

Wed 5/13

9:35 am-10:52 pm

2 stops27h 17m

$731

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 3/2

6:00 am-12:45 am

2 stops27h 45m

Bangkok Suvarnabhumi

Mon 3/30

9:40 pm-11:54 pm

2 stops40h 14m

$731

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 4/15

6:00 am-9:45 am

2 stops37h 45m

Bangkok Suvarnabhumi

Fri 4/24

7:00 am-11:06 pm

2 stops30h 06m

$734

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 3/4

6:09 am-12:20 am

2 stops27h 11m

Bangkok Suvarnabhumi

Tue 3/17

4:55 pm-10:57 pm

2 stops20h 02m

$746

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 3/3

6:10 am-12:20 am

2 stops27h 10m

Bangkok Suvarnabhumi

Thu 3/19

4:55 pm-10:57 pm

2 stops20h 02m

$746

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 60 results
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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

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

Currently, April is the cheapest month in which you can book a flight from Ontario to Thailand (average of $486). Flying from Ontario to Thailand in June is currently the most expensive (average of $748). 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.

What is the cheapest time of day to fly from ONT to TH?

Find hourly flight availability from Ontario to Thailand. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

When flying from Ontario to Thailand, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 38% versus a flight in the afternoon.

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 December 12, 2025.
Peruse reviews from past customers who have flown with STARLUX Airlines, Korean Air, and China 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
243 reviews

Entertainment

8.9

Overall

8.9

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
STARLUX Airlines
8.9
Very good
243 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Entertainment

8.9

Overall

8.9

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
Korean Air
8.4
Very good
1,184 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Entertainment

8.9

Overall

8.9

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
China Airlines
8.2
Very good
788 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Entertainment

8.9

Overall

8.9

Comfort

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

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 30m. Korean Air provides one of the quickest options available for as low as $731. 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 $378 on Korean Air. Other airlines that offer cheap prices include China Airlines from $406 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, April is the cheapest month in which you can book a flight from Ontario to Thailand (average of $486). Flying from Ontario to Thailand in June is currently the most expensive (average of $748). 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 3 airlines flying from Ontario to Thailand

Discover the top 3 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$637Average$805FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$727Average$907FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$781Average$832FlexibilityNo cancel feeOn-timeN/A

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