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฿13,558+ 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 13/3. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
7 Feb — 14 Feb1
1 adult
1 adult, Economy, 0 bags

Flights to Ontario in 2026

Find the latest flights to Ontario in 2026, 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 8 January 2026.

Return from

฿23,372

One-way from

฿13,558

Popular in

July

Cheapest in

September

Average price

฿27,210
Cathay Pacific
  • Cathay Pacific
  • 2/3-7/3
  • 2 total stops
  • 42h 00m total
  • Bangkok to Los Angeles
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STARLUX Airlines
  • STARLUX Airlines
  • 13/3
  • 1 total stop
  • 17h 05m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (฿2,430 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (฿294 potential savings vs. average return price).
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Average for return flights in January 2026
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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 8 January 2026.

Thu 22/117:40BKK - ONT
1 stop37h 10mSTARLUX Airlines
Wed 17/623:10ONT - BKK
1 stop27h 30mSTARLUX Airlines
Deal found 6/1฿23,215
Wed 1/413:10BKK - ONT
1 stop17h 55mSTARLUX Airlines
Sat 11/423:10ONT - BKK
1 stop22h 50mSTARLUX Airlines
Deal found 6/1฿23,530
Wed 11/313:45BKK - ONT
1 stop17h 05mSTARLUX Airlines
Sat 28/323:10ONT - BKK
1 stop22h 50mSTARLUX Airlines
Deal found 5/1฿23,561
Sun 1/217:40BKK - ONT
1 stop37h 10mSTARLUX Airlines
Mon 16/221:45ONT - BKK
1 stop23h 50mSTARLUX Airlines
Deal found 6/1฿23,624
Thu 22/117:40BKK - ONT
1 stop37h 10mSTARLUX Airlines
Wed 4/221:45ONT - BKK
1 stop23h 50mSTARLUX Airlines
Deal found 7/1฿23,656
Fri 23/113:45BKK - ONT
1 stop17h 05mSTARLUX Airlines
Sat 31/121:45ONT - BKK
1 stop23h 50mSTARLUX Airlines
Deal found 8/1฿23,687
Mon 1/613:10BKK - ONT
1 stop17h 55mSTARLUX Airlines
Wed 17/623:10ONT - BKK
1 stop22h 50mSTARLUX Airlines
Deal found 6/1฿23,718
Thu 9/417:50BKK - ONT
1 stop37h 15mSTARLUX Airlines
Wed 22/423:10ONT - BKK
1 stop22h 50mSTARLUX Airlines
Deal found 7/1฿23,781
Wed 27/513:10BKK - ONT
1 stop17h 55mSTARLUX Airlines
Fri 19/623:10ONT - BKK
1 stop22h 50mSTARLUX Airlines
Deal found 7/1฿23,844
Tue 20/117:40BKK - ONT
1 stop37h 10mSTARLUX Airlines
Wed 17/623:10ONT - BKK
1 stop27h 30mSTARLUX Airlines
Deal found 6/1฿24,253
Mon 16/313:45BKK - ONT
1 stop17h 05mSTARLUX Airlines
Wed 18/322:45ONT - BKK
1 stop27h 45mSTARLUX Airlines
Deal found 8/1฿24,285
Tue 24/317:40BKK - ONT
1 stop37h 10mMultiple Airlines
Tue 28/407:30ONT - BKK
2 stops24h 15mMultiple Airlines
Deal found 8/1฿24,819

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 8 January 2026.
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 27/1

17:40-15:50

1 stop37h 10m

Ontario

Mon 15/6

23:10-12:00

1 stop22h 50m

฿24,253

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 24/1

13:45-15:50

1 stop17h 05m

Ontario

Sat 20/6

23:10-12:00

1 stop22h 50m

฿24,253

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 24/1

13:45-15:50

1 stop17h 05m

Ontario

Wed 17/6

23:10-12:00

1 stop22h 50m

฿24,253

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 18/3

10:55-17:50

1 stop20h 55m

Ontario

Mon 6/4

00:10-09:45

1 stop19h 35m

฿25,354

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 24/6

13:10-17:05

1 stop17h 55m

Ontario

Wed 8/7

23:45-12:00

1 stop22h 15m

฿25,386

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 24/6

13:10-17:05

1 stop17h 55m

Ontario

Fri 10/7

23:45-12:00

1 stop22h 15m

฿25,386

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 16/4

13:20-18:00

1 stop18h 40m

Ontario

Fri 24/4

00:10-16:20

1 stop26h 10m

฿26,109

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 23/4

13:20-18:00

1 stop18h 40m

Ontario

Fri 1/5

00:10-12:10

1 stop22h 00m

฿26,235

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 16/4

17:30-18:00

1 stop38h 30m

Ontario

Sun 26/4

00:10-16:20

1 stop26h 10m

฿26,235

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 21/4

10:50-18:00

1 stop21h 10m

Ontario

Fri 1/5

00:10-12:10

1 stop22h 00m

฿26,235

Flights are sorted by cheapest return flights first.

Deals found on 7/1

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 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 ฿24,548

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 8 January 2026.
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
798 reviews
Check prices

Comfort

8.0

Crew

8.5

Overall

8.3

Boarding

8.3

Food

7.8

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
798 reviews
China Airlines
8.3
Very Good
798 reviews
Check prices

Comfort

8.0

Crew

8.5

Overall

8.3

Boarding

8.3

Food

7.8

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.

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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