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Thailand (ภาษาไทย)
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฿15,419+ Cheap flights to Ontario

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
25 Aug — 1 Sep1
1 adult

Flights to Ontario in 2025

Find the latest flights to Ontario in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 17,341 searches and data was last updated on 20 August 2025.

Return from

฿21,274

One-way from

฿15,419

Popular in

August

Cheapest in

October

Average price

฿32,496
Philippine Airlines
  • Philippine Airlines
  • 7/10-31/10
  • 2 total stops
  • 62h 55m total
  • Bangkok to Los Angeles
Search Deals
STARLUX Airlines
  • STARLUX Airlines
  • 4/9
  • 1 total stop
  • 37h 15m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (฿57,810 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿14,404 potential savings vs. average return price).
Search Deals
Average for return flights in August 2025
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Find flight deals to Ontario

Cheapest flights to Ontario
Explore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on 20 August 2025.

Mon 1/913:10BKK - ONT
1 stop17h 55mSTARLUX Airlines
Mon 8/923:10ONT - BKK
1 stop27h 30mSTARLUX Airlines
Deal found 17/8฿25,177
Mon 15/1213:45BKK - ONT
1 stop17h 45mSTARLUX Airlines
Sat 27/1221:45ONT - BKK
1 stop23h 50mSTARLUX Airlines
Deal found 18/8฿25,210
Thu 18/917:50BKK - ONT
1 stop37h 15mSTARLUX Airlines
Sat 20/923:10ONT - BKK
1 stop27h 30mSTARLUX Airlines
Deal found 18/8฿25,242
Tue 28/1017:40BKK - ONT
1 stop37h 10mSTARLUX Airlines
Fri 9/121:45ONT - BKK
1 stop27h 45mSTARLUX Airlines
Deal found 18/8฿26,446
Mon 8/913:10BKK - ONT
1 stop17h 55mSTARLUX Airlines
Fri 3/1023:10ONT - BKK
1 stop22h 50mSTARLUX Airlines
Deal found 17/8฿27,129
Wed 3/1213:45BKK - ONT
1 stop17h 45mSTARLUX Airlines
Mon 15/1221:45ONT - BKK
1 stop23h 50mSTARLUX Airlines
Deal found 18/8฿27,162
Fri 19/1213:45BKK - ONT
1 stop17h 45mSTARLUX Airlines
Sat 3/121:45ONT - BKK
1 stop27h 45mSTARLUX Airlines
Deal found 18/8฿27,292
Fri 12/1217:40BKK - ONT
1 stop37h 50mSTARLUX Airlines
Fri 9/121:45ONT - BKK
1 stop27h 45mSTARLUX Airlines
Deal found 18/8฿27,389
Wed 17/1213:45BKK - ONT
1 stop17h 45mSTARLUX Airlines
Sat 10/121:45ONT - BKK
1 stop27h 45mSTARLUX Airlines
Deal found 17/8฿27,519
Sun 7/913:20BKK - ONT
1 stop19h 20mChina Airlines
Sat 20/900:10ONT - BKK
1 stop26h 10mChina Airlines
Deal found 19/8฿27,715
Sun 7/910:50BKK - ONT
1 stop21h 50mChina Airlines
Sun 14/900:45ONT - BKK
1 stop19h 00mChina Airlines
Deal found 18/8฿28,040
Wed 17/902:40DMK - ONT
2 stops34h 58mMultiple Airlines
Fri 26/923:10ONT - DMK
1 stop22h 35mMultiple Airlines
Deal found 20/8฿36,302

Cheapflights Fare Finder

 
Locate flights to Ontario that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 17,341 searches and data was last updated on 20 August 2025.
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Bangkok

Route

Depart

Return

Price

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 23/12

17:40-16:30

1 stop37h 50m

Ontario

Mon 5/1

21:45-16:30

1 stop27h 45m

฿25,210

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 26/12

13:45-16:30

1 stop17h 45m

Ontario

Wed 7/1

21:45-12:35

1 stop23h 50m

฿25,210

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 26/12

17:40-16:30

1 stop37h 50m

Ontario

Sat 10/1

21:45-16:30

1 stop27h 45m

฿25,210

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 13/12

13:45-16:30

1 stop17h 45m

Ontario

Mon 29/12

21:45-16:30

1 stop27h 45m

฿25,210

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 12/12

13:45-16:30

1 stop17h 45m

Ontario

Fri 9/1

21:45-16:30

1 stop27h 45m

฿26,446

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 28/10

17:40-16:50

1 stop37h 10m

Ontario

Fri 9/1

21:45-16:30

1 stop27h 45m

฿26,446

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 22/12

13:45-16:30

1 stop17h 45m

Ontario

Fri 9/1

21:45-16:30

1 stop27h 45m

฿26,446

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 8/9

13:10-17:05

1 stop17h 55m

Ontario

Fri 3/10

23:10-12:00

1 stop22h 50m

฿27,129

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 18/12

17:40-16:30

1 stop37h 50m

Ontario

Fri 2/1

21:45-12:35

1 stop23h 50m

฿27,162

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 3/12

13:45-16:30

1 stop17h 45m

Ontario

Mon 15/12

21:45-12:35

1 stop23h 50m

฿27,162

Flights are sorted by cheapest return flights first.

Deals found on 18/8

Showing 1-10 of 35 results
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Best time to book a flight to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario 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 to Ontario

How long is the flight to Ontario?

On average, a flight from Bangkok to Ontario takes 28 hours 17 minutes. Flights to Ontario from other popular cities in Thailand will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Ontario?

The most popular airline flying from Bangkok to Ontario is China Airlines.

China Airlines
China Airlines
From ฿833

What are the cheapest airlines that fly to Ontario?

The cheapest airline flying from Bangkok to Ontario is China Airlines.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 3.0 - 86.0 mm per month. February is typically the wettest month, when rainfall can reach 86.0 mm. June is typically the driest time to visit Ontario when rainfall is around 3.0 mm.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 12.0 C).

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 20 August 2025.
See what other customers who have flown with China Airlines to the United States have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very Good
764 reviews
Check prices

Crew

8.5

Boarding

8.3

Entertainment

8.0

Overall

8.3

Comfort

8.0

Food

7.8

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
764 reviews
China Airlines
8.3
Very Good
764 reviews
Check prices

Crew

8.5

Boarding

8.3

Entertainment

8.0

Overall

8.3

Comfort

8.0

Food

7.8

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.

FAQs about flying to Ontario

  • What airport do you fly into for flights to Ontario?

    Travellers will need to book flights to Ontario (ONT) if they wish to fly to Ontario. The Ontario airport is 4.9 km from the city centre.

  • Can I find cheaper flights to Ontario if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Ontario on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Ontario?

    Based on reviews from Cheapflights users, China Airlines is rated the highest out of the airlines that fly to Ontario.

  • Where does the fastest flight to Ontario depart from?

    For those looking to save time traveling to Ontario, Bangkok offers the quickest one-way flight (17 hours 45 minutes).

  • Does Ontario have rental cars?

    Yes. Those touching down at Ontario can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Ontario?

    Yes. Ontario has hotels nearby for those requiring accommodations. Delta Hotels by Marriott Ontario Airport is the closest property to Ontario (0.0 km away from Ontario).

See more FAQs

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How does Cheapflights help users find flights to Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights 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 to Ontario?

Millions of users choose and trust Cheapflights to book the best flight deals to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights to Ontario with no change fees?

Yes, we can. To see specific flights to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can track prices for flights to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals to set up your price alerts.

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