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฿16,919+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
24 Jun — 1 Jul1
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
Explore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on 25 May 2026.

Thu 18/617:50
BKK
-
ONT
1 stop37h 15m
STARLUX Airlines
Sat 4/723:55
ONT
-
BKK
1 stop22h 05m
STARLUX Airlines
Deal found 22/5฿28,623
Wed 17/613:10
BKK
-
ONT
1 stop17h 55m
STARLUX Airlines
Wed 22/723:55
ONT
-
BKK
1 stop22h 05m
STARLUX Airlines
Deal found 22/5฿28,949
Fri 5/617:50
BKK
-
ONT
1 stop37h 15m
STARLUX Airlines
Wed 17/623:10
ONT
-
BKK
1 stop22h 50m
STARLUX Airlines
Deal found 20/5฿28,981
Thu 4/617:50
BKK
-
ONT
1 stop37h 15m
STARLUX Airlines
Wed 17/623:10
ONT
-
BKK
1 stop27h 30m
STARLUX Airlines
Deal found 22/5฿29,046
Mon 22/613:10
BKK
-
ONT
1 stop17h 55m
STARLUX Airlines
Fri 3/723:55
ONT
-
BKK
1 stop26h 45m
STARLUX Airlines
Deal found 20/5฿29,079
Thu 18/617:50
BKK
-
ONT
1 stop37h 15m
STARLUX Airlines
Fri 3/723:55
ONT
-
BKK
1 stop26h 45m
STARLUX Airlines
Deal found 22/5฿29,112
Fri 19/613:20
BKK
-
ONT
1 stop18h 40m
China Airlines
Wed 24/600:10
ONT
-
BKK
1 stop19h 35m
China Airlines
Deal found 21/5฿29,209
Tue 2/613:20
BKK
-
ONT
1 stop18h 40m
China Airlines
Tue 16/600:10
ONT
-
BKK
1 stop19h 35m
China Airlines
Deal found 22/5฿29,242
Sat 20/613:10
BKK
-
ONT
1 stop17h 55m
STARLUX Airlines
Sat 27/623:10
ONT
-
BKK
1 stop22h 50m
STARLUX Airlines
Deal found 20/5฿29,340
Wed 24/613:10
BKK
-
ONT
1 stop17h 55m
STARLUX Airlines
Mon 24/823:55
ONT
-
BKK
1 stop22h 05m
STARLUX Airlines
Deal found 20/5฿29,372
Thu 1/1017:50
BKK
-
ONT
1 stop37h 15m
STARLUX Airlines
Fri 13/1121:45
ONT
-
BKK
1 stop23h 50m
STARLUX Airlines
Deal found 22/5฿29,438
Fri 12/606:15
DMK
-
ONT
1 stop25h 45m
Multiple Airlines
Wed 17/600:10
ONT
-
DMK
1 stop29h 20m
Multiple Airlines
Deal found 22/5฿43,749

Find flight deals to Ontario

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 25 May 2026.

Return from

฿18,386

One-way from

฿16,919

Popular in

July

Cheapest in

September

Average price

฿28,786
25/8-31/8
  • 25/8-31/8
  • 2 total stops
  • 53h 40m total
  • Bangkok to Los Angeles
Search Deals
STARLUX Airlines
  • STARLUX Airlines
  • 10/6
  • 1 total stop
  • 17h 55m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (฿2,718 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿311 potential savings vs. average return price).
Search Deals
Average for return flights in May 2026
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 25 May 2026.
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 - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 20/6

13:20-18:00

1 stop18h 40m

Ontario

Mon 27/7

00:45-09:45

1 stop19h 00m

฿29,633

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 21/6

10:50-18:00

1 stop21h 10m

Ontario

Thu 23/7

00:45-12:10

1 stop21h 25m

฿29,666

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 21/10

09:35-22:59

2 stops51h 24m

Ontario

Sun 25/10

06:00-05:10

2 stops57h 10m

฿31,263

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 29/8

07:00-18:16

2 stops25h 16m

Ontario

Tue 22/9

13:56-09:35

2 stops29h 39m

฿31,654

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 21/6

15:45-22:37

2 stops44h 52m

Ontario

Fri 24/7

13:50-09:35

2 stops29h 45m

฿32,209

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 16/8

10:50-18:40

1 stop21h 50m

Ontario

Sat 29/8

00:45-01:25

1 stop34h 40m

฿33,839

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 4/11

10:55-16:50

1 stop20h 55m

Ontario

Sun 14/3

23:50-16:45

1 stop26h 55m

฿34,491

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 21/10

17:50-18:00

2 stops38h 10m

Ontario

Sun 25/10

23:50-13:05

1 stop23h 15m

฿35,012

BangkokOntario

DMK - ONT

DMKONT

Bangkok Don Mueang Intl

Mon 20/7

07:55-18:40

2 stops24h 45m

Ontario

Fri 24/7

00:45-21:40

3 stops30h 55m

฿45,314

BangkokOntario

DMK - ONT

DMKONT

Bangkok Don Mueang Intl

Fri 5/6

07:55-18:00

2 stops24h 05m

Ontario

Tue 16/6

00:10-16:15

2 stops26h 05m

฿46,194

Flights are sorted by cheapest return flights first.

Deals found on 21/5

Showing 1-10 of 41 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
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 26 hours 42 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

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).

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 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

Browse thousands of different options on Cheapflights for your next trip

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Search flights to Ontario by cabin class

Find flights to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class flights to Ontario
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Economy Class flights to Ontario

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 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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