Thailand

$340+ 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 7/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Apr 22 — Apr 291
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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 March 23, 2026.

This lol.travel deal was found by Cheapflights users on 3/21. 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.
Mon 4/277:00 am
ONT
-
BKK
2 stops24h 45m
Korean Air
Tue 5/129:40 pm
BKK
-
ONT
2 stops33h 30m
Korean Air
Deal found 3/21$687
This lol.travel deal was found by Cheapflights users on 3/22. 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.
Mon 4/277:00 am
ONT
-
BKK
2 stops24h 45m
Korean Air
Wed 5/1311:30 pm
BKK
-
ONT
2 stops31h 40m
Korean Air
Deal found 3/22$692
This Delta deal was found by Cheapflights users on 3/22. 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.
Sun 4/267:00 am
ONT
-
BKK
2 stops24h 45m
Delta
Tue 5/199:50 am
BKK
-
ONT
2 stops21h 20m
Delta
Deal found 3/22$710
This Korean Air deal was found by Cheapflights users on 3/22. 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 4/217:00 am
ONT
-
BKK
2 stops24h 45m
Korean Air
Tue 5/1211:30 pm
BKK
-
ONT
2 stops31h 40m
Korean Air
Deal found 3/22$715
This Delta deal was found by Cheapflights users on 3/22. 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 9/97:00 am
ONT
-
BKK
2 stops28h 05m
Delta
Sat 9/1911:30 pm
BKK
-
ONT
2 stops38h 14m
Delta
Deal found 3/22$722
This Korean Air deal was found by Cheapflights users on 3/22. 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.
Wed 9/97:00 am
ONT
-
BKK
2 stops26h 35m
Korean Air
Sat 9/1911:30 pm
BKK
-
ONT
2 stops31h 46m
Korean Air
Deal found 3/22$727
This Trip.com deal was found by Cheapflights users on 3/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/267:00 am
ONT
-
BKK
2 stops24h 45m
Korean Air
Tue 5/129:50 am
BKK
-
ONT
2 stops21h 20m
Korean Air
Deal found 3/21$728
This SmartFares deal was found by Cheapflights users on 3/20. 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.
Tue 10/2012:10 am
ONT
-
BKK
1 stop22h 00m
China Airlines
Wed 11/42:05 pm
BKK
-
ONT
1 stop17h 45m
China Airlines
Deal found 3/20$749
This SmartFares deal was found by Cheapflights users on 3/20. 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.
Tue 9/812:45 am
ONT
-
BKK
1 stop21h 25m
China Airlines
Tue 9/221:20 pm
BKK
-
ONT
1 stop18h 40m
China Airlines
Deal found 3/20$750
This SmartFares deal was found by Cheapflights users on 3/22. 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.
Wed 9/1612:10 am
ONT
-
BKK
1 stop26h 10m
China Airlines
Sun 9/2710:50 am
BKK
-
ONT
1 stop21h 10m
China Airlines
Deal found 3/22$752
This Rumbo deal was found by Cheapflights users on 3/20. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:10 am
ONT
-
BKK
1 stop19h 35m
China Airlines
Wed 10/211:20 pm
BKK
-
ONT
1 stop18h 40m
China Airlines
Deal found 3/20$758
This oojo deal was found by Cheapflights users on 3/19. 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.
Mon 11/210:50 pm
ONT
-
CNX
1 stop20h 35m
China Airlines
Thu 11/1211:25 am
CNX
-
ONT
1 stop20h 25m
China Airlines
Deal found 3/19$804

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 March 23, 2026.

Round-trip from

$687
(lol.travel)

One-way from

$340
(iWofly)

Popular in

June

Cheapest in

September

Average price

$706
From Ontario to Thailand
One-way flight from Ontario to Thailand
Highest demand for flights based on searches. 14% potential increase in price ($130 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
Average for round-trip flights in March 2026

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 March 23, 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

Mon 4/27

6:00 am-11:35 pm

2 stops27h 35m

Bangkok Suvarnabhumi

Fri 5/8

9:50 am-5:10 pm

2 stops21h 20m

$819

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 5/1

12:10 am-9:45 am

1 stop19h 35m

Bangkok Suvarnabhumi

Wed 5/6

2:40 am-6:00 pm

1 stop29h 20m

$842

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Fri 9/18

12:10 am-10:20 am

1 stop20h 10m

Chiang Mai

Wed 9/23

11:20 am-6:00 pm

1 stop20h 40m

$846

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 7/7

7:00 am-1:05 am

2 stops28h 05m

Bangkok Suvarnabhumi

Mon 7/20

2:35 am-10:40 pm

2 stops34h 05m

$861
Quickest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 4/11

12:10 am-9:45 am

1 stop19h 35m

Bangkok Suvarnabhumi

Mon 5/11

10:50 am-6:00 pm

1 stop21h 10m

$911

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Fri 5/1

2:20 pm-10:10 pm

2 stops41h 50m

Phuket City

Thu 5/21

11:25 pm-11:34 pm

2 stops38h 09m

$915

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Thu 4/30

7:00 am-10:10 pm

2 stops25h 10m

Phuket City

Thu 5/7

11:25 pm-5:10 pm

2 stops31h 45m

$924

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Fri 5/1

2:20 pm-10:10 pm

2 stops41h 50m

Phuket City

Fri 5/22

11:25 pm-10:34 pm

2 stops37h 09m

$924

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 5/9

12:10 am-1:20 pm

2 stops23h 10m

Bangkok Suvarnabhumi

Sun 5/31

5:30 pm-6:00 pm

1 stop38h 30m

$962

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 5/3

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Mon 6/15

5:50 pm-6:00 pm

2 stops38h 10m

$967

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/22

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Thailand (average of $503). 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.

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 March 23, 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.

Boarding

9.0

Overall

9.0

Comfort

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Boarding

9.0

Overall

9.0

Comfort

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Boarding

9.0

Overall

9.0

Comfort

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Boarding

9.0

Overall

9.0

Comfort

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

Boarding

9.0

Overall

9.0

Comfort

8.9

Crew

9.2

Food

8.7

Entertainment

8.8

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

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 19h 35m. Delta provides one of the quickest options available for as low as $842. 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?

  • 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, January is the cheapest month in which you can book a flight from Ontario to Thailand (average of $503). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$457Average$660FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$616Average$783FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$718Average$880FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$763Average$815FlexibilityNo cancel feeOn-timeN/A

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