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$458+ 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 7/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
cze 27 — lip 41
sob. 6/27
sob. 7/4
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 Maj 28, 2026.

This lol.travel deal was found by Cheapflights users on 5/27. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
pon. 7/136:20 am
ONT
-
BKK
2 stops25h 25m
Korean Air
pon. 7/279:50 am
BKK
-
ONT
2 stops45h 31m
Korean Air
Deal found 5/27$831
This Delta deal was found by Cheapflights users on 5/26. 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.
pon. 8/316:20 am
ONT
-
BKK
2 stops28h 45m
Delta
wt. 9/89:50 am
BKK
-
ONT
2 stops26h 54m
Delta
Deal found 5/26$890
This Kissandfly.com deal was found by Cheapflights users on 5/23. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
śr. 7/156:20 am
ONT
-
BKK
2 stops27h 15m
Korean Air
śr. 10/2812:55 am
BKK
-
ONT
2 stops30h 22m
Korean Air
Deal found 5/23$894
This Korean Air deal was found by Cheapflights users on 5/27. 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.
wt. 7/146:20 am
ONT
-
BKK
2 stops41h 15m
Korean Air
pon. 7/209:40 pm
BKK
-
ONT
2 stops39h 12m
Korean Air
Deal found 5/27$895
This SmartFares deal was found by Cheapflights users on 5/23. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
wt. 10/207:00 am
ONT
-
BKK
2 stops24h 45m
Korean Air
śr. 11/1111:15 pm
BKK
-
ONT
2 stops33h 02m
Korean Air
Deal found 5/23$906
This Delta deal was found by Cheapflights users on 5/26. 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.
czw. 8/206:20 am
ONT
-
BKK
2 stops25h 25m
Delta
pt. 8/289:50 am
BKK
-
ONT
2 stops27h 44m
Delta
Deal found 5/26$921
This Korean Air deal was found by Cheapflights users on 5/27. 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.
pt. 7/106:20 am
ONT
-
BKK
2 stops25h 25m
Korean Air
pon. 7/272:35 am
BKK
-
ONT
2 stops28h 46m
Korean Air
Deal found 5/27$926
This SmartFares deal was found by Cheapflights users on 5/24. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ndz. 11/17:00 am
ONT
-
BKK
2 stops23h 30m
Korean Air
pon. 11/1611:15 pm
BKK
-
ONT
2 stops33h 02m
Korean Air
Deal found 5/24$942
This Korean Air deal was found by Cheapflights users on 5/23. 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.
pon. 8/106:00 am
ONT
-
BKK
2 stops25h 45m
Korean Air
pon. 8/172:35 am
BKK
-
ONT
2 stops28h 46m
Korean Air
Deal found 5/23$945
This Delta deal was found by Cheapflights users on 5/27. 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.
czw. 10/157:00 am
ONT
-
BKK
2 stops26h 35m
Delta
sob. 10/319:40 am
BKK
-
ONT
2 stops21h 37m
Delta
Deal found 5/27$952
This Delta deal was found by Cheapflights users on 5/26. 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.
czw. 11/56:00 am
ONT
-
CNX
2 stops25h 55m
Delta
śr. 11/1812:15 am
CNX
-
ONT
2 stops30h 57m
Delta
Deal found 5/26$952
This Korean Air deal was found by Cheapflights users on 5/27. 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.
pon. 11/307:00 am
ONT
-
BKK
2 stops26h 45m
Korean Air
śr. 12/912:55 am
BKK
-
ONT
2 stops31h 22m
Korean Air
Deal found 5/27$957

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 Maj 28, 2026.

Round-trip from

$831
(lol.travel)

One-way from

$458
(Delta)

Popular in

December

Cheapest in

March

Average price

$879
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 ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 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 Maj 28, 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

pon. 8/3

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

pon. 8/24

11:30 pm-5:21 pm

2 stops31h 51m

$984

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

śr. 7/15

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

śr. 7/29

2:35 am-5:21 pm

2 stops28h 46m

$984

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

wt. 8/11

6:20 am-10:10 pm

2 stops25h 50m

Phuket City

śr. 8/26

11:25 pm-11:34 pm

2 stops38h 09m

$990

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

śr. 8/19

6:20 am-10:10 pm

2 stops25h 50m

Phuket City

śr. 8/26

11:25 pm-11:34 pm

2 stops38h 09m

$990

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

sob. 8/15

6:20 am-10:10 pm

2 stops25h 50m

Phuket City

śr. 8/26

11:25 pm-5:21 pm

2 stops31h 56m

$1,045

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

śr. 8/19

6:20 am-10:10 pm

2 stops25h 50m

Phuket City

wt. 8/25

11:25 pm-10:45 pm

2 stops37h 20m

$1,076

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

wt. 8/18

6:20 am-10:10 pm

2 stops25h 50m

Phuket City

wt. 8/25

11:25 pm-10:45 pm

2 stops37h 20m

$1,076

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

czw. 8/13

6:20 am-10:10 pm

2 stops25h 50m

Phuket City

wt. 8/25

11:25 pm-5:21 pm

2 stops31h 56m

$1,076

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

czw. 8/13

6:20 am-10:10 pm

2 stops25h 50m

Phuket City

czw. 8/27

11:25 pm-11:34 pm

2 stops38h 09m

$1,076

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

śr. 7/29

6:20 am-10:10 pm

2 stops25h 50m

Phuket City

śr. 8/12

11:25 pm-10:45 pm

2 stops37h 20m

$1,076

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/27

Showing 1-10 of 60 resultsSorted by cheapest first
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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, 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 December is currently the most expensive (average of $732). 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.

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.

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 Maj 28, 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
327 reviews

Comfort

8.9

Crew

9.1

Entertainment

8.8

Overall

8.9

Boarding

8.9

Food

8.6

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
327 reviews
STARLUX Airlines
8.9
Very good
327 reviews

Comfort

8.9

Crew

9.1

Entertainment

8.8

Overall

8.9

Boarding

8.9

Food

8.6

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
327 reviews

Comfort

8.9

Crew

9.1

Entertainment

8.8

Overall

8.9

Boarding

8.9

Food

8.6

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
327 reviews

Comfort

8.9

Crew

9.1

Entertainment

8.8

Overall

8.9

Boarding

8.9

Food

8.6

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
8,423 reviews
STARLUX Airlines
8.9
Very good
327 reviews

Comfort

8.9

Crew

9.1

Entertainment

8.8

Overall

8.9

Boarding

8.9

Food

8.6

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 25h 25m. Korean Air provides one of the quickest options available for as low as $984. 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 $313 on Delta. Other airlines that offer cheap prices include Korean Air from $316 and China Airlines from $398 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 December is currently the most expensive (average of $732). 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 Maj 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$457Average$666FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$616Average$788FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$717Average$1,158FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$763Average$822FlexibilityNo cancel feeOn-timeN/A

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