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Suvarnabhumi

$409+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Bangkok Suvarnabhumi are usually found in September or August, booked 42 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 August 18, 2025.

Round-trip from

$725
(lol.travel)

One-way from

$409
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$865
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. 17% potential increase in price ($208 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 18, 2025.

This lol.travel deal was found by Cheapflights users on 8/16. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:00 amONT - BKK
2 stops27h 25mKorean Air
Sat 9/132:35 amBKK - ONT
2 stops28h 25mKorean Air
Deal found 8/16$725
This lol.travel deal was found by Cheapflights users on 8/16. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:00 amONT - BKK
2 stops25h 45mKorean Air
Thu 9/42:35 amBKK - ONT
2 stops28h 36mKorean Air
Deal found 8/16$728
This lol.travel deal was found by Cheapflights users on 8/17. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:43 amONT - BKK
2 stops23h 47mKorean Air
Fri 12/59:30 pmBKK - ONT
2 stops34h 47mKorean Air
Deal found 8/17$730
This Tripair deal was found by Cheapflights users on 8/16. 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 Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:00 amONT - BKK
2 stops27h 25mKorean Air
Mon 9/292:35 amBKK - ONT
2 stops28h 25mKorean Air
Deal found 8/16$765
This oojo deal was found by Cheapflights users on 8/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/310:50 pmONT - BKK
1 stop26h 55mChina Airlines
Sun 11/162:35 amBKK - ONT
1 stop29h 15mChina Airlines
Deal found 8/16$766
This oojo deal was found by Cheapflights users on 8/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2412:10 amONT - BKK
1 stop26h 35mChina Airlines
Sat 11/82:05 pmBKK - ONT
1 stop17h 45mChina Airlines
Deal found 8/17$767
This oojo deal was found by Cheapflights users on 8/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1912:10 amONT - BKK
1 stop22h 00mChina Airlines
Sun 12/282:35 amBKK - ONT
1 stop29h 15mChina Airlines
Deal found 8/17$769
This Trip.com deal was found by Cheapflights users on 8/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/26:00 amONT - BKK
2 stops27h 25mKorean Air
Sat 9/611:30 pmBKK - ONT
2 stops31h 41mKorean Air
Deal found 8/17$771
This oojo deal was found by Cheapflights users on 8/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2412:45 amONT - BKK
1 stop19h 00mChina Airlines
Mon 9/12:40 amBKK - ONT
1 stop30h 00mChina Airlines
Deal found 8/17$775
This Gotogate deal was found by Cheapflights users on 8/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:50 pmONT - BKK
1 stop26h 55mChina Airlines
Sun 11/2310:55 amBKK - ONT
1 stop20h 55mChina Airlines
Deal found 8/16$776
This oojo deal was found by Cheapflights users on 8/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2012:45 amONT - BKK
1 stop34h 40mChina Airlines
Sat 8/302:40 amBKK - ONT
1 stop30h 00mChina Airlines
Deal found 8/17$777
This Delta deal was found by Cheapflights users on 8/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/316:05 amONT - BKK
2 stops25h 40mDelta
Mon 10/139:50 amBKK - ONT
2 stops26h 51mDelta
Deal found 8/16$778

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 August 18, 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

Mon 11/3

10:50 pm-1:35 am

1 stop35h 45m

Bangkok Suvarnabhumi

Sun 11/16

2:35 am-4:50 pm

1 stop29h 15m

$766

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 11/27

10:50 pm-1:05 pm

1 stop23h 15m

Bangkok Suvarnabhumi

Thu 12/4

5:50 pm-4:50 pm

1 stop38h 00m

$767

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 10/1

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Wed 10/8

2:40 am-6:00 pm

1 stop29h 20m

$767

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 10/24

12:10 am-9:50 am

1 stop19h 40m

Bangkok Suvarnabhumi

Fri 11/7

2:35 am-4:50 pm

1 stop29h 15m

$767

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 11/11

10:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Thu 11/20

2:05 pm-4:50 pm

1 stop17h 45m

$767

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 9/1

12:45 am-4:20 pm

1 stop25h 35m

Bangkok Suvarnabhumi

Sat 9/27

1:20 pm-6:00 pm

1 stop18h 40m

$767

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 10/27

11:50 pm-9:50 am

1 stop20h 00m

Bangkok Suvarnabhumi

Sat 11/8

2:35 am-4:50 pm

1 stop29h 15m

$769

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 8/31

12:45 am-1:25 am

1 stop34h 40m

Bangkok Suvarnabhumi

Sat 9/6

2:40 am-6:40 pm

1 stop30h 00m

$769

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 10/23

12:10 am-9:45 am

1 stop19h 35m

Bangkok Suvarnabhumi

Thu 10/30

2:35 am-5:50 pm

1 stop29h 15m

$769

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 10/11

12:10 am-12:10 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Thu 10/23

5:30 pm-6:00 pm

1 stop38h 30m

$769

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 20 results
1
2

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 August 8, 2025.

Booking 42 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 $938). Flying from Ontario to Bangkok Suvarnabhumi Airport in December is currently the most expensive (average of $1,552). 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 August 18, 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.

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 August 18, 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
9.0
Wonderful
206 reviews

Comfort

9.0

Boarding

9.0

Entertainment

8.9

Crew

9.3

Overall

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.0
Wonderful
206 reviews
STARLUX Airlines
9.0
Wonderful
206 reviews

Comfort

9.0

Boarding

9.0

Entertainment

8.9

Crew

9.3

Overall

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,131 reviews
STARLUX Airlines
9.0
Wonderful
206 reviews

Comfort

9.0

Boarding

9.0

Entertainment

8.9

Crew

9.3

Overall

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
764 reviews
STARLUX Airlines
9.0
Wonderful
206 reviews

Comfort

9.0

Boarding

9.0

Entertainment

8.9

Crew

9.3

Overall

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
United Airlines
7.4
Good
8,925 reviews
STARLUX Airlines
9.0
Wonderful
206 reviews

Comfort

9.0

Boarding

9.0

Entertainment

8.9

Crew

9.3

Overall

9.0

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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 35h 45m. There are 8280 mi between Ontario and Bangkok Suvarnabhumi Airport.

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

    Korean Air, at $781, was found to be the cheapest airline from Ontario to Bangkok Suvarnabhumi Airport.Alternate airlines to your destination round-trip include STARLUX Airlines and United Airlines. You may be able to fly from Ontario to Bangkok Suvarnabhumi Airport for 23% 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 $938). Flying from Ontario to Bangkok Suvarnabhumi Airport in December is currently the most expensive (average of $1,552). 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
Chonburi
Kanchanaburi
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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$781Average$843FlexibilityNo cancel feeOn-time81%
STARLUX AirlinesCheapest$789Average$838FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$795Average$908FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$815Average$929FlexibilityNo cancel feeOn-time70%

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