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Cheap flights from Bangkok to Ontario from ฿11,387

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — ONT
3 Jan — 10 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Bangkok to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Bangkok to Ontario
Explore the most affordable flight options available from Bangkok to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 December 2025.

Sun 21/1217:50BKK - ONT
1 stop38h 00mChina Airlines
Tue 6/122:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 1/12฿24,560
Thu 25/1210:55BKK - ONT
1 stop20h 55mChina Airlines
Thu 8/122:50ONT - BKK
1 stop26h 55mChina Airlines
Deal found 3/12฿26,921
Mon 15/1202:35BKK - ONT
1 stop29h 15mChina Airlines
Sun 4/122:50ONT - BKK
1 stop20h 00mChina Airlines
Deal found 2/12฿27,335
Tue 16/1216:55BKK - ONT
2 stops20h 54mUnited Airlines
Thu 1/118:39ONT - BKK
2 stops25h 46mUnited Airlines
Deal found 3/12฿29,759
Thu 25/1202:35BKK - ONT
1 stop29h 15mChina Airlines
Sun 4/122:50ONT - BKK
1 stop20h 00mChina Airlines
Deal found 2/12฿30,014
Wed 3/1210:55BKK - ONT
1 stop20h 55mChina Airlines
Wed 10/1222:50ONT - BKK
1 stop35h 45mChina Airlines
Deal found 2/12฿32,152
Wed 24/1210:55BKK - ONT
1 stop20h 55mChina Airlines
Tue 6/122:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 2/12฿32,885
Mon 29/1213:45BKK - ONT
1 stop17h 05mSTARLUX Airlines
Fri 16/121:45ONT - BKK
1 stop27h 45mSTARLUX Airlines
Deal found 3/12฿33,236
Mon 15/1202:35BKK - ONT
1 stop29h 15mChina Airlines
Thu 1/122:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 3/12฿33,300
Wed 24/1214:05BKK - ONT
1 stop17h 45mChina Airlines
Mon 5/122:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 2/12฿34,257

Find flight deals from Bangkok to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Bangkok (TH1) to Ontario (ONT). 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 4 December 2025.

Round-trip from

฿21,594

One-way from

฿11,387

Popular in

July

Cheapest in

December

Average price

฿23,476
STARLUX Airlines
  • STARLUX Airlines
  • 1/4-8/4
  • 2 total stops
  • 40h 45m total
  • Bangkok to Ontario
Search Deals
15/12
  • 15/12
  • 3 total stops
  • 59h 07m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (฿43,815 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿13,535 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Bangkok to Ontario 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 17,341 searches. Data last updated 4 December 2025.
Use the filters below to find and compare flights from Bangkok to Ontario that are best for you.

Fly from

Bangkok

Fly to

Ontario

Route

Depart

Return

Price

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 5/5

13:20-18:00

1 stop18h 40m

Ontario

Mon 25/5

00:10-12:10

1 stop22h 00m

฿24,943

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 6/5

10:50-18:00

1 stop21h 10m

Ontario

Mon 25/5

00:10-16:20

1 stop26h 10m

฿24,943

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 30/1

10:55-16:50

1 stop20h 55m

Ontario

Mon 23/3

23:50-01:35

1 stop35h 45m

฿26,187

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 25/12

10:55-16:50

1 stop20h 55m

Ontario

Thu 8/1

22:50-16:45

1 stop26h 55m

฿26,921

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 26/1

02:35-16:50

1 stop29h 15m

Ontario

Sun 8/2

22:50-09:50

1 stop20h 00m

฿27,144

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 15/12

02:35-16:50

1 stop29h 15m

Ontario

Sun 4/1

22:50-09:50

1 stop20h 00m

฿27,335

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 26/1

14:05-16:50

1 stop17h 45m

Ontario

Tue 24/3

23:50-16:45

1 stop26h 55m

฿27,399

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 30/1

02:35-16:50

1 stop29h 15m

Ontario

Tue 24/3

23:50-13:05

1 stop23h 15m

฿27,399

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 28/1

02:35-16:50

1 stop29h 15m

Ontario

Sun 22/3

23:50-09:50

1 stop20h 00m

฿27,399

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 28/1

14:05-16:50

1 stop17h 45m

Ontario

Mon 23/3

23:50-09:50

1 stop20h 00m

฿27,399

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 36 results
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Best time to book a flight from Bangkok to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Bangkok with our price prediction graph.
Estimated return 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 Bangkok to Ontario

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

Currently, September is the cheapest month in which you can book a flight from Bangkok to Ontario (average of ฿18,755). Flying from Bangkok to Ontario in January is currently the most expensive (average of ฿24,433). 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.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 4 December 2025.
Check out reviews from past customers who have flown with China Airlines from Bangkok to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very Good
787 reviews
Check prices

Entertainment

8.0

Comfort

8.0

Food

7.8

Overall

8.3

Crew

8.5

Boarding

8.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
China Airlines
8.3
Very Good
787 reviews
China Airlines
8.3
Very Good
787 reviews
Check prices

Entertainment

8.0

Comfort

8.0

Food

7.8

Overall

8.3

Crew

8.5

Boarding

8.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.

Related info for your journey

Find useful and relevant information for your journey from Bangkok to Ontario. 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 into for flights to Ontario from Bangkok?

    If you book a flight to Ontario from Bangkok, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 4.9 km from the centre of Ontario. There are 0 flights from Bangkok to Ontario per day from 1 airline.

  • How long is the flight from Bangkok to Ontario?

    China Airlines can get you from Bangkok to Ontario in just under 18h 40m. Your travel time can differ by up to . There are 13325 km between Bangkok and Ontario.

  • What is the cheapest airline to fly from Bangkok to Ontario round-trip?

    Cheapflights users have booked flights from Bangkok to Ontario return from ฿24,891. You may be able to fly from Bangkok to Ontario for 14% less than the average price by searching for this airline.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Bangkok to Ontario (average of ฿18,755). Flying from Bangkok to Ontario in January is currently the most expensive (average of ฿24,433). 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

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 airline flying from Bangkok to Ontario

Discover the top airline that operate flights from Bangkok to Ontario. 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 17,341 searches. Data last updated 4 December 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest฿24,891Average฿28,462FlexibilityNo cancel feeOn-time70%
Search China Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Bangkok to Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Bangkok to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Bangkok to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Bangkok to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Bangkok to Ontario with no change fees?

Yes! Cheapflights helps users easily find flights from Bangkok to Ontario with no change fees.

Can Cheapflights notify me if prices for flights from Bangkok to Ontario become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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