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฿15,558+ Cheap flights to Ontario

— ONT
21 Sep — 28 Sep1
1 adult
1 adult, Economy, 0 bags

Flights to Ontario in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Ontario

Wed 16/910:50 -
1 stop21h 10m
Tue 22/900:10 -
1 stop22h 00m
Deal found 18/8฿25,820
Thu 17/917:30 -
1 stop38h 30m
Wed 23/900:10 -
1 stop35h 15m
Deal found 17/8฿26,147
Thu 10/913:20 -
1 stop19h 20m
Mon 21/900:10 -
1 stop19h 35m
Deal found 18/8฿26,213
Wed 2/910:50 -
1 stop21h 50m
Tue 15/900:10 -
1 stop19h 35m
Deal found 19/8฿26,245
Wed 16/902:40 -
1 stop29h 20m
Mon 21/900:10 -
1 stop19h 35m
Deal found 19/8฿26,474
Mon 12/1013:20 -
1 stop18h 40m
Fri 16/1000:10 -
1 stop26h 10m
Deal found 18/8฿26,507
Fri 4/910:50 -
1 stop21h 50m
Thu 24/900:10 -
1 stop26h 10m
Deal found 19/8฿26,539
Thu 3/913:20 -
1 stop19h 20m
Tue 15/900:10 -
1 stop26h 10m
Deal found 19/8฿26,605
Wed 16/913:10 -
1 stop17h 55m
Wed 23/923:30 -
1 stop27h 10m
Deal found 21/8฿27,291
Sun 6/917:30 -
1 stop39h 10m
Mon 14/900:45 -
1 stop19h 00m
Deal found 17/8฿27,651
Fri 4/1213:45 -
1 stop17h 10m
Sat 12/1221:45 -
1 stop27h 45m
Deal found 19/8฿27,683
Thu 17/906:45 -
2 stops25h 15m
Sat 19/900:10 -
2 stops22h 55m
Deal found 17/8฿32,096

Find flight deals to Ontario

Return from

฿26,474

One-way from

฿15,558

Popular in

July

Cheapest in

October

Average price

฿29,710
Asiana Airlines
  • Asiana Airlines
  • 13/9-30/11
  • 2 total stops
  • 65h 35m total
  • Bangkok to Los Angeles
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China Airlines
  • China Airlines
  • 2/9
  • 1 total stop
  • 21h 50m total
  • Bangkok to Ontario
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Highest demand for flights based on searches. 10% potential increase in price (฿2,989 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (฿334 potential savings vs. average return price).
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Average for return flights in August 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

BangkokOntario

BKK Bangkok Suvarnabhumi - ONT Ontario

BKKONT

Bangkok Suvarnabhumi

Mon 7/9

02:40-18:40

1 stop30h 00m

Ontario

Fri 11/9

00:45-09:45

1 stop19h 00m

฿27,651

BangkokOntario

BKK Bangkok Suvarnabhumi - ONT Ontario

BKKONT

Bangkok Suvarnabhumi

Fri 20/11

14:05-17:05

1 stop18h 00m

Ontario

Tue 1/12

22:50-01:35

1 stop35h 45m

฿30,331

BangkokOntario

BKK Bangkok Suvarnabhumi - ONT Ontario

BKKONT

Bangkok Suvarnabhumi

Thu 1/10

09:35-10:23

2 stops38h 48m

Ontario

Sun 4/10

11:10-22:15

2 stops45h 05m

฿30,690

BangkokOntario

BKK Bangkok Suvarnabhumi - ONT Ontario

BKKONT

Bangkok Suvarnabhumi

Wed 14/10

07:00-15:22

2 stops22h 22m

Ontario

Wed 3/3

05:00-22:50

2 stops26h 50m

฿30,886

BangkokOntario

BKK Bangkok Suvarnabhumi - ONT Ontario

BKKONT

Bangkok Suvarnabhumi

Thu 17/9

09:35-22:51

2 stops27h 16m

Ontario

Mon 21/9

06:08-04:35

2 stops32h 27m

฿30,886

BangkokOntario

BKK Bangkok Suvarnabhumi - ONT Ontario

BKKONT

Bangkok Suvarnabhumi

Wed 2/9

09:35-20:01

2 stops24h 26m

Ontario

Wed 16/9

13:56-09:35

2 stops29h 39m

฿30,919

BangkokOntario

BKK Bangkok Suvarnabhumi - ONT Ontario

BKKONT

Bangkok Suvarnabhumi

Fri 18/9

07:00-18:11

2 stops25h 11m

Ontario

Fri 13/11

06:00-22:50

2 stops25h 50m

฿31,050

BangkokOntario

BKK Bangkok Suvarnabhumi - ONT Ontario

BKKONT

Bangkok Suvarnabhumi

Thu 17/9

17:50-17:05

1 stop37h 15m

Ontario

Mon 21/9

23:30-16:40

1 stop27h 10m

฿31,507

BangkokOntario

DMK Bangkok Don Mueang Intl - ONT Ontario

DMKONT

Bangkok Don Mueang Intl

Tue 8/9

06:00-18:40

2 stops26h 40m

Ontario

Sat 12/9

00:45-13:05

2 stops22h 20m

฿32,325

BangkokOntario

DMK Bangkok Don Mueang Intl - ONT Ontario

DMKONT

Bangkok Don Mueang Intl

Thu 17/9

07:30-18:00

2 stops24h 30m

Ontario

Wed 23/9

00:10-23:05

2 stops32h 55m

฿32,880

Flights are sorted by cheapest return flights first.

Deals found on 18/8

Showing 1-10 of 40 resultsSorted by cheapest first
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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

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 0 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.

Rainfall in Ontario 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

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).

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.

  • 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 10 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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