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$358+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
ene. 3 — ene. 101
sáb. 1/3
sáb. 1/10
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 diciembre 4, 2025.

This Delta deal was found by Cheapflights users on 12/1. 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.
jue. 12/46:40 amONT - BKK
2 stops27h 05mDelta
vie. 1/239:40 amBKK - ONT
2 stops28h 11mDelta
Deal found 12/1$744
This Korean Air deal was found by Cheapflights users on 12/1. 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.
mar. 12/26:40 amONT - BKK
2 stops23h 50mKorean Air
mié. 1/2112:55 amBKK - ONT
2 stops36h 56mKorean Air
Deal found 12/1$749
This Delta deal was found by Cheapflights users on 12/1. 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.
jue. 12/46:40 amONT - BKK
2 stops27h 05mDelta
dom. 1/259:40 amBKK - ONT
2 stops28h 11mDelta
Deal found 12/1$778
This Korean Air deal was found by Cheapflights users on 12/1. 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.
jue. 12/46:40 amONT - BKK
2 stops27h 05mKorean Air
lun. 1/199:40 amBKK - ONT
2 stops43h 16mKorean Air
Deal found 12/1$799
This Delta deal was found by Cheapflights users on 12/3. 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.
mié. 12/316:38 amONT - BKK
2 stops25h 42mDelta
mié. 1/149:40 amBKK - ONT
2 stops52h 11mDelta
Deal found 12/3$867
This Delta deal was found by Cheapflights users on 12/3. 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.
mar. 12/3011:42 amONT - BKK
2 stops44h 38mDelta
mié. 1/149:40 amBKK - ONT
2 stops52h 11mDelta
Deal found 12/3$874
This Delta deal was found by Cheapflights users on 12/4. 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.
jue. 12/46:00 amONT - HKT
2 stops25h 10mDelta
jue. 12/1111:40 pmHKT - ONT
2 stops32h 27mDelta
Deal found 12/4$894
This Delta deal was found by Cheapflights users on 12/3. 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.
mié. 12/316:38 amONT - BKK
2 stops25h 42mDelta
jue. 1/1512:55 amBKK - ONT
2 stops28h 01mDelta
Deal found 12/3$907
This United Airlines deal was found by Cheapflights users on 12/3. 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.
jue. 12/46:00 amONT - BKK
2 stops38h 25mUnited Airlines
jue. 12/114:55 pmBKK - ONT
2 stops20h 54mUnited Airlines
Deal found 12/3$908
This Delta deal was found by Cheapflights users on 12/3. 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.
mar. 12/305:49 pmONT - BKK
2 stops38h 31mDelta
jue. 1/1512:55 amBKK - ONT
2 stops28h 01mDelta
Deal found 12/3$914
This FlightHub deal was found by Cheapflights users on 12/2. 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. 12/310:50 pmONT - BKK
1 stop20h 00mChina Airlines
jue. 12/2510:55 amBKK - ONT
1 stop20h 55mChina Airlines
Deal found 12/2$915
This United Airlines deal was found by Cheapflights users on 12/3. 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.
jue. 12/41:50 pmONT - BKK
2 stops30h 35mUnited Airlines
sáb. 12/204:55 pmBKK - ONT
2 stops44h 46mUnited Airlines
Deal found 12/3$923

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 diciembre 4, 2025.

Round-trip from

$690
(Delta)

One-way from

$358
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$1,124
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 ($159 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 diciembre 4, 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

mar. 1/20

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

sáb. 2/14

12:15 am-9:44 pm

2 stops36h 29m

$690

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

mié. 4/29

6:00 am-11:55 pm

2 stops27h 55m

Bangkok Suvarnabhumi

mar. 5/26

9:35 am-11:06 pm

2 stops51h 31m

$726

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

mar. 3/10

6:00 am-11:25 am

2 stops39h 25m

Bangkok Suvarnabhumi

lun. 6/8

7:00 am-11:06 pm

2 stops30h 06m

$734

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

mié. 1/21

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

jue. 2/12

12:15 am-11:49 pm

2 stops38h 34m

$734

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

jue. 1/22

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

sáb. 2/14

12:15 am-9:44 pm

2 stops36h 29m

$734

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

dom. 1/18

7:30 am-10:55 pm

2 stops24h 25m

Chiang Mai

lun. 2/16

12:15 am-11:49 pm

2 stops38h 34m

$734

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

jue. 1/8

1:53 pm-11:25 am

2 stops54h 32m

Bangkok Suvarnabhumi

mar. 5/26

9:35 am-11:06 pm

2 stops51h 31m

$737

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

sáb. 5/9

7:00 am-11:40 pm

2 stops26h 40m

Bangkok Suvarnabhumi

mié. 5/20

2:35 am-10:40 pm

2 stops34h 05m

$740

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

lun. 3/9

6:00 am-9:30 pm

2 stops25h 30m

Bangkok Suvarnabhumi

jue. 4/9

9:50 am-10:34 pm

2 stops26h 44m

$744

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

sáb. 1/10

6:00 am-11:25 am

2 stops38h 25m

Bangkok Suvarnabhumi

lun. 1/26

4:55 pm-10:53 pm

2 stops20h 58m

$750

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

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 diciembre 4, 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 diciembre 4, 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
241 reviews

Comfort

8.9

Overall

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.9

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
241 reviews
STARLUX Airlines
8.9
Very good
241 reviews

Comfort

8.9

Overall

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.9

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
1,179 reviews
STARLUX Airlines
8.9
Very good
241 reviews

Comfort

8.9

Overall

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
China Airlines
8.3
Very good
787 reviews
STARLUX Airlines
8.9
Very good
241 reviews

Comfort

8.9

Overall

8.9

Boarding

8.9

Crew

9.2

Food

8.7

Entertainment

8.9

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 25m. Delta provides one of the quickest options available for as low as $690. The distance between Ontario and Thailand is about 8060 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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Alternative routes for Ontario to Thailand

See prices for flight routes from nearby airports that may be better suited for you.
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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 diciembre 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$637Average$805FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$736Average$907FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$787Average$832FlexibilityNo cancel feeOn-timeN/A

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