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Cheap flights from Bangkok to Ontario from ฿13,099

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 27/1. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — ONT
13 Jan — 20 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 14 December 2025.

Tue 16/1217:50BKK - ONT
1 stop38h 00mChina Airlines
Thu 22/122:50ONT - BKK
1 stop26h 55mChina Airlines
Deal found 12/12฿24,780
Wed 17/1210:55BKK - ONT
1 stop20h 55mChina Airlines
Wed 24/1222:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 11/12฿24,969
Thu 18/1217:40BKK - ONT
1 stop37h 10mSTARLUX Airlines
Mon 29/1221:45ONT - BKK
1 stop27h 45mSTARLUX Airlines
Deal found 13/12฿25,001
Mon 15/1217:50BKK - ONT
1 stop38h 00mChina Airlines
Sun 11/122:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 14/12฿25,127
Wed 24/1214:05BKK - ONT
1 stop17h 45mChina Airlines
Sat 27/1222:50ONT - BKK
1 stop35h 45mChina Airlines
Deal found 13/12฿28,055
Wed 17/1210:55BKK - ONT
1 stop20h 55mChina Airlines
Tue 30/1222:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 13/12฿28,622
Sat 20/1217:50BKK - ONT
1 stop38h 00mChina Airlines
Sun 28/1222:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 14/12฿28,653
Tue 16/1216:55BKK - ONT
2 stops20h 54mUnited Airlines
Thu 22/106:00ONT - BKK
2 stops32h 10mUnited Airlines
Deal found 12/12฿29,283
Thu 18/1216:55BKK - ONT
2 stops20h 46mUnited Airlines
Tue 30/1218:39ONT - BKK
2 stops49h 46mUnited Airlines
Deal found 13/12฿29,724
Sat 13/1213:45BKK - ONT
1 stop17h 05mSTARLUX Airlines
Sat 13/1221:45ONT - BKK
1 stop27h 45mSTARLUX Airlines
Deal found 12/12฿30,416
Sat 20/1217:50BKK - ONT
1 stop38h 00mChina Airlines
Tue 23/1222:50ONT - BKK
1 stop35h 45mChina Airlines
Deal found 13/12฿31,078
Wed 17/1210:55BKK - ONT
1 stop20h 55mChina Airlines
Sun 28/1222:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 13/12฿31,141

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 14 December 2025.

Round-trip from

฿21,159

One-way from

฿13,099

Popular in

July

Cheapest in

December

Average price

฿23,174
STARLUX Airlines
  • STARLUX Airlines
  • 22/1-4/2
  • 2 total stops
  • 61h 00m total
  • Bangkok to Ontario
Search Deals
STARLUX Airlines
  • STARLUX Airlines
  • 27/1
  • 1 total stop
  • 37h 10m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (฿57,578 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿14,559 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 14 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

Fri 6/3

17:40-15:50

1 stop37h 10m

Ontario

Wed 11/3

22:45-12:35

1 stop23h 50m

฿23,080

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 1/2

17:50-16:50

1 stop38h 00m

Ontario

Sun 1/3

22:50-01:35

1 stop35h 45m

฿24,717

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 6/5

10:50-18:00

1 stop21h 10m

Ontario

Tue 26/5

00:10-16:20

1 stop26h 10m

฿24,780

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 23/1

17:50-16:50

1 stop38h 00m

Ontario

Wed 28/1

22:50-01:35

1 stop35h 45m

฿25,977

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 19/2

02:35-16:50

1 stop29h 15m

Ontario

Wed 25/2

22:50-01:35

1 stop35h 45m

฿25,977

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 15/2

10:55-16:50

1 stop20h 55m

Ontario

Wed 25/2

22:50-01:35

1 stop35h 45m

฿25,977

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 16/2

02:35-16:50

1 stop29h 15m

Ontario

Wed 25/2

22:50-01:35

1 stop35h 45m

฿25,977

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 19/1

17:50-16:50

1 stop38h 00m

Ontario

Wed 28/1

22:50-01:35

1 stop35h 45m

฿26,544

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 19/1

02:35-16:50

1 stop29h 15m

Ontario

Wed 28/1

22:50-01:35

1 stop35h 45m

฿26,544

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 24/1

10:55-16:50

1 stop20h 55m

Ontario

Wed 28/1

22:50-01:35

1 stop35h 45m

฿26,544

Flights are sorted by cheapest return flights first.

Deals found on 13/12

Showing 1-10 of 33 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 ฿18,514). Flying from Bangkok to Ontario in January is currently the most expensive (average of ฿24,119). 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 14 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
791 reviews
Check prices

Overall

8.3

Food

7.8

Crew

8.5

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.
China Airlines
8.3
Very Good
791 reviews
China Airlines
8.3
Very Good
791 reviews
Check prices

Overall

8.3

Food

7.8

Crew

8.5

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.

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?

    STARLUX Airlines and China Airlines can get you from Bangkok to Ontario in just under 37h 10m. Your travel time can differ by up to 50m. There are 13325 km between Bangkok and Ontario. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Bangkok to Ontario return from ฿24,572. You may be able to fly from Bangkok to Ontario for 12% 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 ฿18,514). Flying from Bangkok to Ontario in January is currently the most expensive (average of ฿24,119). 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 14 December 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest฿24,572Average฿28,790FlexibilityNo 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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