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Thailand (ภาษาไทย)
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฿15,309+ 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 21/12. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
21 Dec — 28 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals to Ontario

Enter your travel dates to find the best prices.

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 21 November 2025.

Mon 15/1202:35BKK - ONT
1 stop29h 15mChina Airlines
Tue 6/122:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 20/11฿25,104
Sun 21/1210:55BKK - ONT
1 stop20h 55mChina Airlines
Tue 6/122:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 21/11฿26,272
Fri 26/1214:05BKK - ONT
1 stop17h 45mChina Airlines
Thu 8/122:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 21/11฿26,564
Fri 21/1110:55BKK - ONT
1 stop20h 55mChina Airlines
Sun 30/1122:50ONT - BKK
1 stop20h 00mChina Airlines
Deal found 20/11฿27,147
Sun 23/1102:35BKK - ONT
1 stop29h 15mChina Airlines
Fri 28/1122:50ONT - BKK
1 stop26h 55mChina Airlines
Deal found 20/11฿27,180
Fri 21/1118:20BKK - ONT
1 stop37h 30mChina Airlines
Mon 24/1122:50ONT - BKK
1 stop23h 15mChina Airlines
Deal found 21/11฿27,537
Mon 24/1113:45BKK - ONT
1 stop17h 05mSTARLUX Airlines
Mon 1/1221:45ONT - BKK
1 stop23h 50mSTARLUX Airlines
Deal found 20/11฿28,023
Fri 19/1202:35BKK - ONT
1 stop29h 15mChina Airlines
Tue 23/1222:50ONT - BKK
1 stop35h 45mChina Airlines
Deal found 21/11฿28,964
Fri 21/1116:55BKK - ONT
2 stops20h 56mUnited Airlines
Mon 24/1106:00ONT - BKK
2 stops32h 10mUnited Airlines
Deal found 21/11฿29,645
Fri 21/1116:55BKK - ONT
2 stops20h 56mUnited Airlines
Sun 30/1106:00ONT - BKK
2 stops27h 20mUnited Airlines
Deal found 20/11฿29,742
Sun 23/1102:35BKK - ONT
1 stop29h 15mChina Airlines
Mon 1/1222:50ONT - BKK
1 stop26h 55mChina Airlines
Deal found 20/11฿29,807

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 21 November 2025.

Return from

฿22,185

One-way from

฿15,309

Popular in

July

Cheapest in

September

Average price

฿25,720
Philippine Airlines
  • Philippine Airlines
  • 4/12-10/12
  • 2 total stops
  • 60h 45m total
  • Bangkok to Los Angeles
Search Deals
China Airlines
  • China Airlines
  • 21/12
  • 1 total stop
  • 29h 15m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (฿1,991 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease (฿253 potential savings vs. average return price).
Search Deals
Average for return flights in November 2025
Search Deals

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 21 November 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 16/12

10:55-16:50

1 stop20h 55m

Ontario

Tue 6/1

22:50-01:35

1 stop35h 45m

฿25,104

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 24/3

14:05-17:50

1 stop17h 45m

Ontario

Thu 30/4

00:10-09:45

1 stop19h 35m

฿25,201

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 14/4

10:50-18:00

1 stop21h 10m

Ontario

Thu 14/5

00:10-12:10

1 stop22h 00m

฿25,201

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 21/3

02:35-17:50

1 stop29h 15m

Ontario

Wed 25/3

23:50-01:35

1 stop35h 45m

฿25,201

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 1/4

17:30-18:00

1 stop38h 30m

Ontario

Thu 30/4

00:10-09:45

1 stop19h 35m

฿25,201

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 2/2

02:35-16:50

1 stop29h 15m

Ontario

Mon 9/3

23:50-16:45

1 stop26h 55m

฿25,201

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 4/4

13:10-17:05

1 stop17h 55m

Ontario

Fri 17/4

23:10-12:00

1 stop22h 50m

฿25,299

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 8/3

02:35-17:50

1 stop29h 15m

Ontario

Thu 2/4

00:10-12:10

1 stop22h 00m

฿26,401

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 11/3

14:05-17:50

1 stop17h 45m

Ontario

Mon 30/3

00:10-16:20

1 stop26h 10m

฿26,401

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 31/1

02:35-16:50

1 stop29h 15m

฿15,374

Flights are sorted by cheapest return flights first.

Deals found on 21/11

Showing 1-10 of 29 results
1
2
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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 21 hours 20 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 ฿27,014

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 21 November 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
782 reviews
Check prices

Boarding

8.3

Food

7.8

Entertainment

8.0

Crew

8.6

Comfort

8.0

Overall

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
782 reviews
China Airlines
8.3
Very Good
782 reviews
Check prices

Boarding

8.3

Food

7.8

Entertainment

8.0

Crew

8.6

Comfort

8.0

Overall

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.

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 5 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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