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Cheap flights from Bangkok to Ontario from ฿15,083

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 20/3. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — ONT
28 Feb — 7 Mar1
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 29 January 2026.

Mon 20/410:50
BKK
-
ONT
1 stop21h 10m
China Airlines
Fri 1/500:10
ONT
-
BKK
1 stop19h 35m
China Airlines
Deal found 27/1฿24,549
Tue 8/917:30
BKK
-
ONT
1 stop39h 10m
China Airlines
Tue 15/900:10
ONT
-
BKK
1 stop35h 15m
China Airlines
Deal found 28/1฿24,673
Sat 16/513:20
BKK
-
ONT
1 stop18h 40m
China Airlines
Sat 29/800:45
ONT
-
BKK
1 stop25h 35m
China Airlines
Deal found 28/1฿24,735
Wed 8/413:20
BKK
-
ONT
1 stop18h 40m
China Airlines
Fri 1/500:10
ONT
-
BKK
1 stop22h 00m
China Airlines
Deal found 27/1฿24,766
Fri 29/513:20
BKK
-
ONT
1 stop18h 40m
China Airlines
Tue 2/600:10
ONT
-
BKK
1 stop19h 35m
China Airlines
Deal found 27/1฿24,828
Thu 10/913:20
BKK
-
ONT
1 stop19h 20m
China Airlines
Thu 10/900:45
ONT
-
BKK
1 stop19h 00m
China Airlines
Deal found 29/1฿24,859
Mon 9/317:50
BKK
-
ONT
1 stop38h 00m
China Airlines
Tue 17/323:50
ONT
-
BKK
1 stop35h 45m
China Airlines
Deal found 29/1฿24,890
Mon 4/513:20
BKK
-
ONT
1 stop18h 40m
China Airlines
Mon 8/600:10
ONT
-
BKK
1 stop19h 35m
China Airlines
Deal found 28/1฿24,983
Sat 20/610:50
BKK
-
ONT
1 stop21h 10m
Multiple Airlines
Tue 28/707:00
ONT
-
BKK
2 stops24h 45m
Multiple Airlines
Deal found 27/1฿25,263
Thu 12/310:55
BKK
-
ONT
1 stop20h 55m
China Airlines
Sun 4/1000:10
ONT
-
BKK
1 stop19h 35m
China Airlines
Deal found 27/1฿26,659
Fri 26/617:30
BKK
-
ONT
1 stop38h 30m
China Airlines
Wed 1/700:45
ONT
-
BKK
1 stop21h 25m
China Airlines
Deal found 29/1฿26,690
Sun 22/314:05
BKK
-
ONT
1 stop17h 45m
China Airlines
Sat 4/400:10
ONT
-
BKK
1 stop22h 00m
China Airlines
Deal found 27/1฿26,846

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 29 January 2026.

Round-trip from

฿24,549

One-way from

฿15,083

Popular in

July

Cheapest in

March

Average price

฿27,839
China Airlines
  • China Airlines
  • 20/4-1/5
  • 2 total stops
  • 40h 45m total
  • Bangkok to Ontario
Search Deals
China Airlines
  • China Airlines
  • 20/3
  • 1 total stop
  • 17h 45m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (฿81,777 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (฿16,574 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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 29 January 2026.
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

Mon 20/4

10:50-18:00

1 stop21h 10m

Ontario

Fri 1/5

00:10-09:45

1 stop19h 35m

฿24,549

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 16/5

13:20-18:00

1 stop18h 40m

Ontario

Sat 29/8

00:45-16:20

1 stop25h 35m

฿24,735

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 26/4

17:30-18:00

1 stop38h 30m

Ontario

Fri 1/5

00:10-16:20

1 stop26h 10m

฿24,735

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 26/3

14:05-17:50

1 stop17h 45m

Ontario

Sat 4/4

00:10-09:45

1 stop19h 35m

฿24,735

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 13/4

10:50-18:00

1 stop21h 10m

Ontario

Fri 24/4

00:10-12:10

1 stop22h 00m

฿24,766

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 27/5

10:50-18:00

1 stop21h 10m

Ontario

Tue 2/6

00:10-12:10

1 stop22h 00m

฿24,766

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 29/5

13:20-18:00

1 stop18h 40m

Ontario

Tue 2/6

00:10-09:45

1 stop19h 35m

฿24,828

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 26/6

17:30-18:00

1 stop38h 30m

Ontario

Wed 1/7

00:45-12:10

1 stop21h 25m

฿26,690

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 22/3

14:05-17:50

1 stop17h 45m

Ontario

Sat 4/4

00:10-12:10

1 stop22h 00m

฿26,846

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 20/6

17:30-18:00

1 stop38h 30m

Ontario

Tue 28/7

07:00-21:45

2 stops24h 45m

฿27,311

Flights are sorted by cheapest return flights first.

Deals found on 28/1

Showing 1-10 of 39 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 ฿18,249). Flying from Bangkok to Ontario in July is currently the most expensive (average of ฿22,997). 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 29 January 2026.
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
802 reviews
Check prices

Food

7.8

Overall

8.3

Crew

8.5

Boarding

8.3

Comfort

8.0

Entertainment

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
802 reviews
China Airlines
8.3
Very Good
802 reviews
Check prices

Food

7.8

Overall

8.3

Crew

8.5

Boarding

8.3

Comfort

8.0

Entertainment

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?

    China Airlines can get you from Bangkok to Ontario in just under 21h 10m. 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 ฿15,065. You may be able to fly from Bangkok to Ontario for 43% 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 ฿18,249). Flying from Bangkok to Ontario in July is currently the most expensive (average of ฿22,997). 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 29 January 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest฿15,065Average฿25,848FlexibilityNo 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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