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$439+ Cheap flights from Ontario (ONT) to Bangkok

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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jan 25 — Feb 11
Sat 1/25
Sat 2/1
1 adult, Economy
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The best prices from Ontario to Bangkok are usually found in October or September, booked 63 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Ontario to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Bangkok (TH1). 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 20, 2025.

Round-trip from

$875
(Delta)

One-way from

$439
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$986
From Ontario to Bangkok
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One-way flight from Ontario to Bangkok
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High demand for flights, 23% potential price rise
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Best time to find cheap flights, 5% potential price drop
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Average for round-trip flights in January 2025
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Find flight deals from Ontario to Bangkok

Cheapest flights from Ontario to Bangkok
Explore the most affordable flight options available from Ontario to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 20, 2025.

This Delta deal was found by Cheapflights users on 1/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/115:40 amONT - BKK
2 stops29h 05mDelta
Tue 3/1811:15 pmBKK - ONT
2 stops37h 07mDelta
Deal found 1/20$875
This Gotogate deal was found by Cheapflights users on 1/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2010:45 pmONT - BKK
1 stop27h 00mChina Airlines
Wed 3/52:05 pmBKK - ONT
1 stop17h 45mChina Airlines
Deal found 1/20$877
This United Airlines deal was found by Cheapflights users on 1/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/226:00 amONT - BKK
2 stops27h 55mUnited Airlines
Fri 5/99:35 amBKK - ONT
2 stops24h 59mUnited Airlines
Deal found 1/20$904
This KAYAK deal was found by Cheapflights users on 1/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/176:00 amONT - BKK
2 stops27h 45mKorean Air
Mon 3/179:30 pmBKK - ONT
2 stops33h 12mKorean Air
Deal found 1/19$909
This Korean Air deal was found by Cheapflights users on 1/18. 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.
Sun 2/26:00 amONT - BKK
2 stops27h 45mMultiple Airlines
Sun 2/239:30 pmBKK - ONT
2 stops32h 55mMultiple Airlines
Deal found 1/18$910
This KAYAK deal was found by Cheapflights users on 1/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:00 amONT - BKK
2 stops33h 40mQatar Airways
Mon 11/106:55 pmBKK - ONT
2 stops38h 22mQatar Airways
Deal found 1/19$1,075
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1111:45 pmONT - DMK
1 stop24h 10mMultiple Airlines
Tue 3/257:45 amDMK - ONT
1 stop24h 05mMultiple Airlines
Deal found 1/19$1,282

Find flights from Ontario to Bangkok within your budget

Customize your flight search to find flights from Ontario to Bangkok 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 20, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 3/11

5:40 am-12:45 am

2 stops29h 05m

Bangkok Suvarnabhumi

Tue 3/25

9:30 pm-10:22 pm

2 stops38h 52m

$875

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 2/20

10:45 pm-4:45 pm

1 stop27h 00m

Bangkok Suvarnabhumi

Wed 3/5

2:05 pm-4:50 pm

1 stop17h 45m

$877

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 4/22

6:00 am-11:55 pm

2 stops27h 55m

Bangkok Suvarnabhumi

Fri 5/9

9:35 am-8:34 pm

2 stops24h 59m

$904

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 2/17

6:00 am-12:45 am

2 stops27h 45m

Bangkok Suvarnabhumi

Mon 3/17

9:30 pm-4:42 pm

2 stops33h 12m

$909

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 2/2

6:00 am-12:45 am

2 stops27h 45m

Bangkok Suvarnabhumi

Sun 2/23

9:30 pm-3:25 pm

2 stops32h 55m

$910

OntarioBangkok

ONT - DMK

ONTDMK

Ontario

Tue 3/11

11:45 pm-1:55 pm

1 stop24h 10m

Bangkok Don Mueang Intl

Tue 3/25

7:45 am-5:50 pm

1 stop24h 05m

$1,282

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 4/7

8:26 am-9:10 pm

2 stops46h 44m

$439

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 3/26

6:00 am-5:55 am

2 stops33h 55m

$471

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 2/10

6:00 am-9:30 pm

2 stops24h 30m

$485

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 2/24

10:45 pm-1:05 pm

1 stop23h 20m

$494

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 16 results
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Best time to book a flight from Ontario to Bangkok

Have a flexible travel schedule? Discover the best time to fly to Bangkok 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 Bangkok

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

How far ahead should I book a flight from Ontario to Bangkok?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Bangkok. Price data was last updated on January 17, 2025.

Booking 63 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Bangkok. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Bangkok (average of $996). Flying from Ontario to Bangkok 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 BKK?

Find hourly flight availability from Ontario to Bangkok. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 20, 2025.

It’s typically best to fly out from Ontario to Bangkok in the morning. Doing so could potentially save you 29% on the flight price compared to flying in the afternoon, which is usually more expensive.

Rainfall in Bangkok by month

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

In terms of precipitation, rainfall in Bangkok 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 Bangkok when rainfall is around 0.4 in.

Temperature in Bangkok by month

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

If weather is an important factor for your trip to Bangkok, 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 Bangkok

Get insights into the airlines that provide service to Bangkok. 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 Bangkok. Reviews last updated January 20, 2025.
See what other customers who have flown with China Airlines and United Airlines from Ontario to Bangkok have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Overall

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

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
1,039 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Overall

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

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
737 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Overall

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

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
9,696 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Overall

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

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
8,521 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Overall

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

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.

Qatar Airways
7.5
Good
3,754 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Overall

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

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 Bangkok. 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 Bangkok?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Bangkok from Ontario. Booking flights from Ontario (ONT) to Bangkok should be relatively easy as there are 0 daily outbound flights to Bangkok from 6 different airlines.

  • What are the cheapest airlines flying from Ontario to Bangkok round-trip?

    Our cheapest airline available from Ontario to Bangkok is Delta. Our recent data shows that you can find tickets from as low as $875 on this airline. Additional options worth looking into are China Airlines and United Airlines, starting at $877 and $904 round-trip. Delta is priced at 17% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Ontario to Bangkok one-way?

    The cheapest airline one-way is Qatar Airways, with whom users have recently found tickets for as low as $471. However, be on the lookout for offers from Delta and China Airlines, as they are both options that can get you from Ontario to Bangkok for a low price.

  • Can I find deals for flights from Ontario to Bangkok that include hotel bookings?

    Yes. In addition to deals on Ontario to Bangkok flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Bangkok?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Bangkok.

  • Can I find deals for business class flights from Ontario to Bangkok?

    Yes. Cheapflights offers flight deals from Ontario to Bangkok 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 Bangkok?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Bangkok (average of $996). Flying from Ontario to Bangkok 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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Top 6 airlines flying from Ontario to Bangkok

Discover the top 6 airlines that operate flights from Ontario to Bangkok. 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 20, 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$828Average$944FlexibilityNo cancel feeOn-time70%
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