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Suvarnabhumi

$358+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ontario to Bangkok Suvarnabhumi are usually found in October or September, booked 17 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap 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 December 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.
Thu 12/46:40 amONT - BKK
2 stops27h 05mDelta
Fri 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.
Tue 12/26:40 amONT - BKK
2 stops23h 50mKorean Air
Wed 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.
Thu 12/46:40 amONT - BKK
2 stops27h 05mDelta
Sun 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.
Thu 12/46:40 amONT - BKK
2 stops27h 05mKorean Air
Mon 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.
Wed 12/316:38 amONT - BKK
2 stops25h 42mDelta
Wed 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.
Tue 12/3011:42 amONT - BKK
2 stops44h 38mDelta
Wed 1/149:40 amBKK - ONT
2 stops52h 11mDelta
Deal found 12/3$874
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.
Wed 12/316:38 amONT - BKK
2 stops25h 42mDelta
Thu 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.
Thu 12/46:00 amONT - BKK
2 stops38h 25mUnited Airlines
Thu 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.
Tue 12/305:49 pmONT - BKK
2 stops38h 31mDelta
Thu 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.
Wed 12/310:50 pmONT - BKK
1 stop20h 00mChina Airlines
Thu 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.
Thu 12/41:50 pmONT - BKK
2 stops30h 35mUnited Airlines
Sat 12/204:55 pmBKK - ONT
2 stops44h 46mUnited Airlines
Deal found 12/3$923
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/310:50 pmONT - BKK
1 stop23h 15mChina Airlines
Tue 12/910:55 amBKK - ONT
1 stop20h 55mChina Airlines
Deal found 12/2$929

Find 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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$724
(FlightHub)

One-way from

$358
(Trip.com)

Popular in

December

Cheapest in

October

Average price

$1,456
Provider with most accurate pricing for Ontario-Bangkok Suvarnabhumi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Bangkok Suvarnabhumi flights.
Search Deals
From Ontario to Bangkok Suvarnabhumi
Search Deals
One-way flight from Ontario to Bangkok Suvarnabhumi
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 4, 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 4/29

6:00 am-11:55 pm

2 stops27h 55m

Bangkok Suvarnabhumi

Tue 5/26

9:35 am-11:06 pm

2 stops51h 31m

$726

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 3/10

6:00 am-11:25 am

2 stops39h 25m

Bangkok Suvarnabhumi

Mon 6/8

7:00 am-11:06 pm

2 stops30h 06m

$734

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 1/8

1:53 pm-11:25 am

2 stops54h 32m

Bangkok Suvarnabhumi

Tue 5/26

9:35 am-11:06 pm

2 stops51h 31m

$737

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 5/9

7:00 am-11:40 pm

2 stops26h 40m

Bangkok Suvarnabhumi

Wed 5/20

2:35 am-10:40 pm

2 stops34h 05m

$740

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 3/9

6:00 am-9:30 pm

2 stops25h 30m

Bangkok Suvarnabhumi

Thu 4/9

9:50 am-10:34 pm

2 stops26h 44m

$744

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 1/10

6:00 am-11:25 am

2 stops38h 25m

Bangkok Suvarnabhumi

Mon 1/26

4:55 pm-10:53 pm

2 stops20h 58m

$750

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 4/5

6:00 am-9:45 am

2 stops37h 45m

Bangkok Suvarnabhumi

Mon 4/13

3:40 pm-5:47 pm

2 stops40h 07m

$750

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 1/26

1:53 pm-11:25 am

2 stops30h 32m

Bangkok Suvarnabhumi

Thu 1/29

4:55 pm-10:53 pm

2 stops20h 58m

$751

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Fri 1/30

6:00 am-11:25 am

2 stops38h 25m

Bangkok Suvarnabhumi

Tue 2/10

4:55 pm-10:53 pm

2 stops20h 58m

$751

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 3/4

6:00 am-11:25 am

2 stops38h 25m

Bangkok Suvarnabhumi

Wed 3/18

4:55 pm-10:57 pm

2 stops20h 02m

$751

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 24 results
1
2
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Compare providers for flights from Ontario to Suvarnabhumi

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Suvarnabhumi in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Bangkok Suvarnabhumi Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Bangkok Suvarnabhumi Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Bangkok Suvarnabhumi Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Bangkok Suvarnabhumi Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Bangkok Suvarnabhumi Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 November 28, 2025.

Booking 17 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, November is the cheapest month in which you can book a flight from Ontario to Bangkok Suvarnabhumi Airport (average of $590). Flying from Ontario to Bangkok Suvarnabhumi Airport in June is currently the most expensive (average of $786). 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 December 4, 2025.

It’s typically best to fly out from Ontario to Bangkok Suvarnabhumi Airport in the morning. Doing so could potentially save you 28% 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 December 4, 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
241 reviews

Overall

8.9

Food

8.7

Boarding

8.9

Crew

9.2

Comfort

8.9

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

Overall

8.9

Food

8.7

Boarding

8.9

Crew

9.2

Comfort

8.9

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

Overall

8.9

Food

8.7

Boarding

8.9

Crew

9.2

Comfort

8.9

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

Overall

8.9

Food

8.7

Boarding

8.9

Crew

9.2

Comfort

8.9

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 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 3 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 30m. 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?

    Korean Air, at $637, was found to be the cheapest airline from Ontario to Bangkok Suvarnabhumi Airport.Alternate airlines to your destination round-trip include China Airlines and STARLUX Airlines. You may be able to fly from Ontario to Bangkok Suvarnabhumi Airport for 36% less than the average price by searching for these airlines.

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

    To fly one-way, consider booking your trip with Korean Air, which is currently one of the cheapest options available, starting at $378. China Airlines flights start at $406 while deals on STARLUX Airlines start at $445 one-way.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Bangkok Suvarnabhumi Airport (average of $590). Flying from Ontario to Bangkok Suvarnabhumi Airport in June is currently the most expensive (average of $786). 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
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 3 airlines flying from Ontario to Suvarnabhumi

Discover the top 3 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$637Average$805FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$736Average$892FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$787Average$832FlexibilityNo cancel feeOn-timeN/A

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