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Suvarnabhumi

$361+ Cheap flights from Ontario (ONT) to Suvarnabhumi (BKK)

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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Bangkok Suvarnabhumi are usually found in August or September, booked 67 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Ontario to Suvarnabhumi

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Suvarnabhumi (BKK). 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 September 17, 2025.

Round-trip from

$701
(SmartFares)

One-way from

$361
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$825
From Ontario to Bangkok Suvarnabhumi
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One-way flight from Ontario to Bangkok Suvarnabhumi
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Highest demand for flights based on searches. 9% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Suvarnabhumi

Cheapest flights from Ontario to Suvarnabhumi
Explore the most affordable flight options available from Ontario to Suvarnabhumi. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This SmartFares deal was found by Cheapflights users on 9/14. 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 12/26:40 amONT - BKK
2 stops25h 40mKorean Air
Mon 1/1912:55 amBKK - ONT
2 stops36h 43mKorean Air
Deal found 9/14$701
This Delta deal was found by Cheapflights users on 9/15. 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 10/196:00 amONT - BKK
2 stops25h 45mDelta
Sat 11/111:15 pmBKK - ONT
2 stops37h 05mDelta
Deal found 9/15$710
This Korean Air deal was found by Cheapflights users on 9/17. 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 10/56:00 amONT - BKK
2 stops29h 05mKorean Air
Sat 11/229:30 pmBKK - ONT
2 stops34h 39mKorean Air
Deal found 9/17$715
This Delta deal was found by Cheapflights users on 9/15. 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.
Sat 10/181:15 pmONT - BKK
2 stops42h 30mDelta
Sun 11/211:15 pmBKK - ONT
2 stops32h 55mDelta
Deal found 9/15$716
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 9/266:36 pmONT - BKK
2 stops43h 59mUnited Airlines
Tue 10/149:35 amBKK - ONT
2 stops46h 05mUnited Airlines
Deal found 9/15$724
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/166:00 amONT - BKK
2 stops32h 35mUnited Airlines
Fri 9/267:00 amBKK - ONT
2 stops29h 52mUnited Airlines
Deal found 9/15$727
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 9/176:00 amONT - BKK
2 stops27h 55mUnited Airlines
Fri 9/267:00 amBKK - ONT
2 stops24h 40mUnited Airlines
Deal found 9/15$730
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 9/156:50 pmONT - BKK
2 stops43h 45mUnited Airlines
Sun 9/217:00 amBKK - ONT
2 stops27h 43mUnited Airlines
Deal found 9/15$733
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/166:00 amONT - BKK
2 stops32h 35mUnited Airlines
Fri 10/314:55 pmBKK - ONT
2 stops19h 56mUnited Airlines
Deal found 9/16$743
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sun 11/166:00 amONT - BKK
2 stops38h 25mUnited Airlines
Sun 2/154:55 pmBKK - ONT
2 stops34h 23mUnited Airlines
Deal found 9/15$750
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sun 11/236:38 pmONT - BKK
2 stops25h 47mUnited Airlines
Sun 12/144:55 pmBKK - ONT
2 stops20h 54mUnited Airlines
Deal found 9/16$751
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/281:40 pmONT - BKK
2 stops55h 45mUnited Airlines
Sat 11/84:55 pmBKK - ONT
2 stops34h 42mUnited Airlines
Deal found 9/16$756

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Suvarnabhumi 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 September 17, 2025.
Use the filters below to find and compare flights from Ontario to Bangkok Suvarnabhumi Airport that are best for you.

Fly from

Ontario

Fly to

Suvarnabhumi

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 12/3

6:40 am-11:20 pm

2 stops25h 40m

Bangkok Suvarnabhumi

Sun 12/14

11:15 pm-10:47 pm

2 stops38h 32m

$710

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 1/4

6:45 am-11:20 pm

2 stops25h 35m

Bangkok Suvarnabhumi

Tue 1/20

9:40 am-10:38 pm

2 stops27h 58m

$710

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 10/5

6:00 am-1:05 am

2 stops29h 05m

Bangkok Suvarnabhumi

Sat 11/22

11:15 pm-5:09 pm

2 stops32h 54m

$715

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 9/29

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

Tue 10/14

2:35 am-5:10 pm

2 stops28h 35m

$715

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 1/16

6:45 am-11:20 pm

2 stops25h 35m

Bangkok Suvarnabhumi

Fri 2/20

12:55 am-3:20 pm

2 stops29h 25m

$715

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 10/21

7:35 am-1:15 pm

2 stops39h 40m

Bangkok Suvarnabhumi

Mon 10/27

11:15 pm-5:10 pm

2 stops31h 55m

$715

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 1/4

6:45 am-11:20 pm

2 stops25h 35m

Bangkok Suvarnabhumi

Mon 1/19

12:55 am-3:20 pm

2 stops29h 25m

$715

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 3/7

6:45 am-11:20 pm

2 stops25h 35m

Bangkok Suvarnabhumi

Sat 3/14

12:55 am-10:48 am

2 stops47h 53m

$716

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 10/18

9:50 am-11:25 pm

2 stops47h 35m

Bangkok Suvarnabhumi

Mon 10/27

11:15 pm-10:41 pm

2 stops37h 26m

$716

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 1/6

6:00 am-11:25 am

2 stops38h 25m

Bangkok Suvarnabhumi

Tue 1/20

9:10 am-5:43 pm

2 stops47h 33m

$732

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 23 results
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2
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Best time to book a flight from Ontario to Suvarnabhumi

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

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Suvarnabhumi. Price data was last updated on September 12, 2025.

Booking 67 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Bangkok Suvarnabhumi Airport. 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 Suvarnabhumi Airport?

Currently, September is the cheapest month in which you can book a flight from Ontario to Bangkok Suvarnabhumi Airport (average of $900). Flying from Ontario to Bangkok Suvarnabhumi Airport in December is currently the most expensive (average of $1,507). 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 Suvarnabhumi. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

It’s typically best to fly out from Ontario to Bangkok Suvarnabhumi Airport 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.

How much does it cost to fly round-trip from Ontario to Bangkok Suvarnabhumi Airport?

Reviews of airlines servicing Suvarnabhumi

Get insights into the airlines that provide service to Suvarnabhumi. 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 Suvarnabhumi. Reviews last updated September 17, 2025.
Read reviews from past customers who have flown STARLUX Airlines, Korean Air, and China Airlines from Ontario to Bangkok Suvarnabhumi Airport. 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.
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Crew

9.2

Food

8.8

Overall

8.9

Entertainment

8.9

Boarding

9.0

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
STARLUX Airlines
8.9
Very good
215 reviews
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Crew

9.2

Food

8.8

Overall

8.9

Entertainment

8.9

Boarding

9.0

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
Korean Air
8.4
Very good
1,140 reviews
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Crew

9.2

Food

8.8

Overall

8.9

Entertainment

8.9

Boarding

9.0

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
China Airlines
8.3
Very good
768 reviews
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Crew

9.2

Food

8.8

Overall

8.9

Entertainment

8.9

Boarding

9.0

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
United Airlines
7.4
Good
8,926 reviews
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Crew

9.2

Food

8.8

Overall

8.9

Entertainment

8.9

Boarding

9.0

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

Related info for your journey

Find useful and relevant information for your journey from Ontario to Suvarnabhumi. 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 Suvarnabhumi?

    Most people fly from Ontario (ONT) if they book a flight from Ontario to Bangkok Suvarnabhumi. On average, Ontario has 0 outbound flights to Bangkok Suvarnabhumi per day from 4 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • How long is the flight from Ontario to Bangkok Suvarnabhumi Airport?

    Departing from Ontario to Bangkok Suvarnabhumi Airport will take you 25h 40m. There are 8280 mi between Ontario and Bangkok Suvarnabhumi Airport. Both multi-stop and nonstop flights can be found to your destination and back.

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

    China Airlines, at $773, was found to be the cheapest airline from Ontario to Bangkok Suvarnabhumi Airport.Alternate airlines to your destination round-trip include Korean Air and STARLUX Airlines. You may be able to fly from Ontario to Bangkok Suvarnabhumi Airport for 24% less than the average price by searching for these airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Suvarnabhumi 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 Suvarnabhumi Airport?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Bangkok Suvarnabhumi Airport (average of $900). Flying from Ontario to Bangkok Suvarnabhumi Airport in December is currently the most expensive (average of $1,507). 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

Traveling to a place near Bangkok Suvarnabhumi Airport?

Book flights to Bangkok Suvarnabhumi Airport if you plan to visit one of these locations
Sattahip
Kanchanaburi
Chonburi
Cha-am
Ko Samet
Pak Chong
Phetchaburi
Ko Lan

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Alternative routes for Ontario to Suvarnabhumi

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Ontario to Suvarnabhumi

Discover the top 4 airlines that operate flights from Ontario to Suvarnabhumi. 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$773Average$922FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$781Average$843FlexibilityNo cancel feeOn-time81%
STARLUX AirlinesCheapest$789Average$841FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$795Average$908FlexibilityNo cancel feeOn-time69%

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