HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jul 27 — Aug 31
Mon 7/27
Mon 8/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Suvarnabhumi with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 June 27, 2026.

This lol.travel deal was found by Cheapflights users on 6/24. 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.
Sat 10/317:00 am
ONT
-
BKK
2 stops24h 30m
Korean Air
Tue 11/109:30 pm
BKK
-
ONT
2 stops34h 47m
Korean Air
Deal found 6/24$830
This Delta deal was found by Cheapflights users on 6/26. 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.
Mon 8/106:20 am
ONT
-
BKK
2 stops27h 15m
Delta
Wed 8/2611:30 pm
BKK
-
ONT
2 stops38h 04m
Delta
Deal found 6/26$838
This Delta deal was found by Cheapflights users on 6/23. 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.
Mon 8/246:00 am
ONT
-
BKK
2 stops27h 35m
Delta
Tue 9/159:50 am
BKK
-
ONT
2 stops27h 57m
Delta
Deal found 6/23$839
This Korean Air deal was found by Cheapflights users on 6/24. 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.
Mon 12/77:00 am
ONT
-
BKK
2 stops23h 30m
Korean Air
Wed 12/2311:15 pm
BKK
-
ONT
2 stops32h 41m
Korean Air
Deal found 6/24$844
This Delta deal was found by Cheapflights users on 6/23. 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 8/235:05 pm
ONT
-
BKK
2 stops38h 40m
Delta
Wed 9/1611:30 pm
BKK
-
ONT
2 stops38h 17m
Delta
Deal found 6/23$845
This lol.travel deal was found by Cheapflights users on 6/25. 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 8/36:20 am
ONT
-
BKK
2 stops27h 15m
Korean Air
Sun 8/169:50 am
BKK
-
ONT
2 stops45h 31m
Korean Air
Deal found 6/25$882
This lol.travel deal was found by Cheapflights users on 6/21. 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 7/306:20 am
ONT
-
BKK
2 stops25h 25m
Korean Air
Wed 10/2812:55 am
BKK
-
ONT
2 stops30h 22m
Korean Air
Deal found 6/21$888
This Delta deal was found by Cheapflights users on 6/23. 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 8/186:00 am
ONT
-
BKK
2 stops27h 35m
Delta
Sat 8/292:35 am
BKK
-
ONT
2 stops34h 59m
Delta
Deal found 6/23$889
This Korean Air deal was found by Cheapflights users on 6/26. 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.
Fri 11/67:00 am
ONT
-
BKK
2 stops23h 30m
Korean Air
Wed 11/2512:55 am
BKK
-
ONT
2 stops31h 22m
Korean Air
Deal found 6/26$894
This Korean Air deal was found by Cheapflights users on 6/22. 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.
Fri 9/256:20 am
ONT
-
BKK
2 stops25h 25m
Korean Air
Sun 10/1111:30 pm
BKK
-
ONT
2 stops31h 47m
Korean Air
Deal found 6/22$895
This Delta deal was found by Cheapflights users on 6/25. 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 11/115:50 pm
ONT
-
BKK
2 stops60h 40m
Delta
Sun 11/229:40 am
BKK
-
ONT
2 stops40h 36m
Delta
Deal found 6/25$902
This Delta deal was found by Cheapflights users on 6/24. 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 10/316:00 am
ONT
-
BKK
2 stops25h 30m
Delta
Wed 11/259:40 am
BKK
-
ONT
2 stops21h 32m
Delta
Deal found 6/24$903

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 June 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$827
(lol.travel)

One-way from

$409
(lol.travel)

Popular in

December

Cheapest in

January

Average price

$1,400
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 ($78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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 June 27, 2026.
Use the filters below to find and compare flights from Ontario to Bangkok Suvarnabhumi Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 9/22

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Mon 10/19

9:50 am-5:17 pm

2 stops21h 27m

$839

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 9/21

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Wed 10/21

9:50 am-5:17 pm

2 stops21h 27m

$839

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Thu 10/1

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Mon 10/19

2:35 am-5:12 pm

2 stops28h 37m

$844

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 8/17

6:20 am-11:35 pm

2 stops27h 15m

Bangkok Suvarnabhumi

Thu 8/20

2:35 am-5:21 pm

2 stops28h 46m

$894

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sun 10/25

7:00 am-9:30 pm

2 stops24h 30m

Bangkok Suvarnabhumi

Wed 10/28

12:55 am-5:17 pm

2 stops30h 22m

$895

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 8/12

9:01 am-11:55 pm

2 stops24h 54m

Bangkok Suvarnabhumi

Tue 9/1

9:35 am-8:01 pm

2 stops24h 26m

$949

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 7/20

6:20 am-9:45 pm

2 stops25h 25m

Bangkok Suvarnabhumi

Mon 7/27

11:30 pm-5:21 pm

2 stops31h 51m

$956

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 11/24

6:00 am-12:20 am

2 stops27h 20m

Bangkok Suvarnabhumi

Wed 12/23

4:55 pm-11:06 pm

2 stops21h 11m

$967

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Sat 7/11

4:20 pm-9:35 am

2 stops27h 15m

Bangkok Suvarnabhumi

Tue 7/14

7:00 am-3:29 pm

2 stops22h 29m

$1,005

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 8/11

12:45 am-12:10 pm

1 stop21h 25m

Bangkok Suvarnabhumi

Tue 9/1

5:30 pm-6:40 pm

1 stop39h 10m

$1,022

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/23

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Bangkok Suvarnabhumi Airport flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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?

Booking 82 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, January is the cheapest month in which you can book a flight from Ontario to Bangkok Suvarnabhumi Airport (average of $764). Flying from Ontario to Bangkok Suvarnabhumi Airport in December is currently the most expensive (average of $1,486). 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.

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 June 27, 2026.
Read reviews from past customers who have flown STARLUX Airlines,Korean Air, andChina 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
347 reviews

Entertainment

8.8

Overall

8.9

Crew

9.2

Boarding

8.9

Comfort

8.9

Food

8.7

Reviews

1 / 14
8.0
Excellent

Andrew,Jun 2026

SEA - TPE

Great value for a coach ticket. Fantastic leg room for a 6’3”” man.
STARLUX Airlines
8.9
Very good
347 reviews
STARLUX Airlines
8.9
Very good
347 reviews

Entertainment

8.8

Overall

8.9

Crew

9.2

Boarding

8.9

Comfort

8.9

Food

8.7

Reviews

1 / 14
8.0
Excellent

Andrew,Jun 2026

SEA - TPE

Great value for a coach ticket. Fantastic leg room for a 6’3”” man.
Korean Air
8.4
Very good
1,218 reviews
STARLUX Airlines
8.9
Very good
347 reviews

Entertainment

8.8

Overall

8.9

Crew

9.2

Boarding

8.9

Comfort

8.9

Food

8.7

Reviews

1 / 14
8.0
Excellent

Andrew,Jun 2026

SEA - TPE

Great value for a coach ticket. Fantastic leg room for a 6’3”” man.
China Airlines
8.3
Very good
829 reviews
STARLUX Airlines
8.9
Very good
347 reviews

Entertainment

8.8

Overall

8.9

Crew

9.2

Boarding

8.9

Comfort

8.9

Food

8.7

Reviews

1 / 14
8.0
Excellent

Andrew,Jun 2026

SEA - TPE

Great value for a coach ticket. Fantastic leg room for a 6’3”” man.
Delta
7.8
Good
8,452 reviews
STARLUX Airlines
8.9
Very good
347 reviews

Entertainment

8.8

Overall

8.9

Crew

9.2

Boarding

8.9

Comfort

8.9

Food

8.7

Reviews

1 / 14
8.0
Excellent

Andrew,Jun 2026

SEA - TPE

Great value for a coach ticket. Fantastic leg room for a 6’3”” man.

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 25m. There are 8280 mi between Ontario and Bangkok Suvarnabhumi Airport.

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

    Delta, at $457, was found to be the cheapest airline from Ontario to Bangkok Suvarnabhumi Airport.Alternate airlines to your destination round-trip include Korean Air and China Airlines. You may be able to fly from Ontario to Bangkok Suvarnabhumi Airport for 52% 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 Delta, which is currently one of the cheapest options available, starting at $313. Korean Air flights start at $316 while deals on China Airlines start at $398 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, January is the cheapest month in which you can book a flight from Ontario to Bangkok Suvarnabhumi Airport (average of $764). Flying from Ontario to Bangkok Suvarnabhumi Airport in December is currently the most expensive (average of $1,486). 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
Ko Samet
Chonburi
Cha-am
Sattahip
Pak Chong

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 June 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$457Average$668FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$616Average$820FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$717Average$835FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$763Average$830FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.