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$449+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jan 13 — Jan 201
Mon 1/13
Mon 1/20
1 adult, Economy
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Cheap flight deals from Ontario to Thailand

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Thailand (TH0). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 8, 2025.

Round-trip from

$875
(Delta)

One-way from

$449
(Trip.com)
From Ontario to Thailand
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One-way flight from Ontario to Thailand
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Find 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 January 8, 2025.

This Delta deal was found by Cheapflights users on 1/7. 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.
Tue 3/46:00 amONT - BKK
2 stops26h 20mDelta
Mon 3/101:00 amBKK - ONT
2 stops35h 22mDelta
Deal found 1/7$875
This ScholarTrip deal was found by Cheapflights users on 1/7. 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/306:00 amONT - BKK
2 stops24h 30mKorean Air
Wed 4/309:40 pmBKK - ONT
2 stops33h 34mKorean Air
Deal found 1/7$884
This Gotogate deal was found by Cheapflights users on 1/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1312:10 amONT - BKK
1 stop22h 00mChina Airlines
Sun 11/235:50 pmBKK - ONT
1 stop38h 00mChina Airlines
Deal found 1/6$890
This United Airlines deal was found by Cheapflights users on 1/6. 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.
Sat 2/86:15 amONT - BKK
2 stops26h 50mUnited Airlines
Mon 2/177:10 amBKK - ONT
2 stops22h 19mUnited Airlines
Deal found 1/6$907
This Korean Air deal was found by Cheapflights users on 1/6. 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.
Thu 2/276:00 amONT - BKK
2 stops24h 30mMultiple Airlines
Sun 3/91:00 amBKK - ONT
2 stops29h 42mMultiple Airlines
Deal found 1/6$910
This KAYAK deal was found by Cheapflights users on 1/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/206:00 amONT - CNX
2 stops26h 05mKorean Air
Mon 3/103:20 pmCNX - ONT
2 stops39h 22mKorean Air
Deal found 1/7$917
This ScholarTrip deal was found by Cheapflights users on 1/7. 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/176:00 amONT - HKT
2 stops24h 40mKorean Air
Wed 2/2611:20 pmHKT - ONT
2 stops31h 05mKorean Air
Deal found 1/7$979
This Korean Air deal was found by Cheapflights users on 1/7. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/185:40 amONT - HKT
2 stops26h 00mMultiple Airlines
Tue 4/111:40 pmHKT - ONT
2 stops31h 02mMultiple Airlines
Deal found 1/7$1,017
This Qatar Airways deal was found by Cheapflights users on 1/6. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:00 amONT - BKK
2 stops35h 05mQatar Airways
Sun 9/148:00 pmBKK - ONT
2 stops40h 37mQatar Airways
Deal found 1/6$1,025
This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/266:00 amONT - HKT
2 stops33h 50mQatar Airways
Thu 3/138:20 amHKT - ONT
2 stops53h 04mQatar Airways
Deal found 1/7$1,077
This oojo deal was found by Cheapflights users on 1/6. 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 5/1212:10 amONT - CNX
2 stops23h 35mMultiple Airlines
Sat 5/2411:20 amCNX - ONT
1 stop20h 40mMultiple Airlines
Deal found 1/6$1,136
This Gurufare deal was found by Cheapflights users on 1/7. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/710:45 pmONT - CNX
2 stops24h 00mChina Airlines
Fri 2/1411:25 amCNX - ONT
1 stop20h 25mChina Airlines
Deal found 1/7$1,153

Find flights from Ontario to Thailand within your budget

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 January 8, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 3/4

6:00 am-11:20 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Mon 3/10

1:00 am-10:22 pm

2 stops35h 22m

$875

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 1/30

6:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Wed 4/30

9:40 pm-5:14 pm

2 stops33h 34m

$884

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 3/30

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Mon 5/19

10:50 am-6:00 pm

1 stop21h 10m

$896

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 2/8

6:15 am-12:05 am

2 stops26h 50m

Bangkok Suvarnabhumi

Wed 2/19

7:10 am-8:52 pm

2 stops28h 42m

$907

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 2/27

6:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Mon 3/10

1:00 am-10:22 pm

2 stops35h 22m

$910

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

Mon 1/20

6:00 am-11:05 pm

2 stops26h 05m

Chiang Mai

Mon 3/10

3:20 pm-4:42 pm

2 stops39h 22m

$917

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Mon 2/17

6:00 am-9:40 pm

2 stops24h 40m

Phuket City

Wed 2/26

11:20 pm-3:25 pm

2 stops31h 05m

$979

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Tue 3/18

5:40 am-9:40 pm

2 stops26h 00m

Phuket City

Tue 4/1

11:40 pm-4:42 pm

2 stops31h 02m

$1,017

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 4/29

11:46 am-7:05 am

2 stops29h 19m

Bangkok Suvarnabhumi

Mon 5/26

8:00 pm-10:37 pm

2 stops40h 37m

$1,064

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

Wed 2/26

6:00 am-6:50 am

2 stops33h 50m

Phuket City

Thu 3/13

8:20 am-11:24 pm

2 stops53h 04m

$1,077

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 36 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.

Travel insights for flights from Ontario to Thailand

Get recent, data-driven insights about flights from Ontario to Thailand including ideal travel times, pricing trends, and more.

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Thailand (average of $996). Flying from Ontario to Thailand in June is currently the most expensive (average of $1,585). 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 January 8, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Thailand as you normally would.

Rainfall in Thailand by month

Plan your trip to Thailand by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Thailand ranges from 0.4 - 12.6 inches per month. September is typically the wettest month, when rainfall can reach 12.6 in. January is typically the driest time to visit Thailand when rainfall is around 0.4 in.

Temperature in Thailand by month

Plan your trip to Thailand by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Thailand, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

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 January 8, 2025.
Peruse reviews from past customers who have flown with China Airlines, Qatar Airways and Delta from Ontario to Thailand to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.5
Very good
1,028 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.5

Crew

8.7

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Korean Air
8.5
Very good
1,028 reviews
Korean Air
8.5
Very good
1,028 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.5

Crew

8.7

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Japan Airlines
8.3
Very good
1,441 reviews
Korean Air
8.5
Very good
1,028 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.5

Crew

8.7

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

China Airlines
8.2
Very good
733 reviews
Korean Air
8.5
Very good
1,028 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.5

Crew

8.7

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Alaska Airlines
8.0
Very good
9,619 reviews
Korean Air
8.5
Very good
1,028 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.5

Crew

8.7

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Delta
8.0
Very good
8,503 reviews
Korean Air
8.5
Very good
1,028 reviews

Boarding

8.5

Entertainment

8.2

Food

8.1

Comfort

8.3

Overall

8.5

Crew

8.7

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

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.

  • 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 $485 on Delta. Other airlines that offer cheap prices include China Airlines from $518 and Korean Air from $539 one-way.

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

    Most travelers choose Ontario - Bangkok Suvarnabhumi, Ontario - Phuket City or Ontario - Bangkok Don Mueang Intl 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, October is the cheapest month in which you can book a flight from Ontario to Thailand (average of $996). Flying from Ontario to Thailand in June is currently the most expensive (average of $1,585). 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 6 airlines flying from Ontario to Thailand

Discover the top 6 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 January 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$683Average$684FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$785Average$871FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$795Average$1,035FlexibilityNo cancel feeOn-time69%
Japan AirlinesCheapest$806Average$1,169FlexibilityNo cancel feeOn-time79%
DeltaCheapest$807Average$996FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$825Average$1,028FlexibilityNo cancel feeOn-time70%
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