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฿14,133+ 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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
26 Mar — 2 Apr1
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 24 February 2026.

Thu 16/413:20
BKK
-
ONT
1 stop18h 40m
China Airlines
Tue 28/400:10
ONT
-
BKK
1 stop22h 00m
China Airlines
Deal found 21/2฿23,213
Thu 16/410:50
BKK
-
ONT
1 stop21h 10m
Multiple Airlines
Wed 29/407:00
ONT
-
BKK
2 stops24h 45m
Multiple Airlines
Deal found 21/2฿23,368
Wed 29/410:50
BKK
-
ONT
1 stop21h 10m
China Airlines
Tue 12/500:10
ONT
-
BKK
1 stop19h 35m
China Airlines
Deal found 22/2฿23,709
Sat 20/617:30
BKK
-
ONT
1 stop38h 30m
Multiple Airlines
Tue 28/707:00
ONT
-
BKK
2 stops24h 45m
Multiple Airlines
Deal found 23/2฿23,802
Fri 20/310:55
BKK
-
ONT
1 stop20h 55m
China Airlines
Mon 23/323:50
ONT
-
BKK
1 stop23h 15m
China Airlines
Deal found 21/2฿23,926
Thu 12/314:05
BKK
-
ONT
1 stop17h 45m
China Airlines
Sun 15/323:50
ONT
-
BKK
1 stop23h 15m
China Airlines
Deal found 20/2฿24,205
Thu 12/317:50
BKK
-
ONT
1 stop38h 00m
China Airlines
Sun 13/900:45
ONT
-
BKK
1 stop25h 35m
China Airlines
Deal found 23/2฿24,236
Thu 23/410:50
BKK
-
ONT
1 stop21h 10m
China Airlines
Sat 23/500:10
ONT
-
BKK
1 stop35h 15m
China Airlines
Deal found 23/2฿25,042
Thu 16/407:30
DMK
-
ONT
2 stops24h 30m
Multiple Airlines
Tue 28/400:10
ONT
-
DMK
2 stops27h 25m
Multiple Airlines
Deal found 21/2฿29,877
Thu 2/407:30
DMK
-
ONT
2 stops24h 30m
Multiple Airlines
Thu 16/400:10
ONT
-
DMK
2 stops33h 05m
Multiple Airlines
Deal found 24/2฿46,396
Thu 7/502:00
DMK
-
ONT
2 stops29h 05m
Multiple Airlines
Sun 24/500:10
ONT
-
DMK
1 stop31h 10m
Multiple Airlines
Deal found 20/2฿189,427
Tue 7/403:15
DMK
-
ONT
2 stops27h 58m
Multiple Airlines
Sat 25/423:10
ONT
-
DMK
1 stop32h 10m
Multiple Airlines
Deal found 23/2฿193,239

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 24 February 2026.

Return from

฿21,881

One-way from

฿14,133

Popular in

July

Cheapest in

September

Average price

฿22,222
Asiana Airlines
  • Asiana Airlines
  • 23/5-2/6
  • 2 total stops
  • 52h 55m total
  • Bangkok to Los Angeles
Search Deals
China Airlines
  • China Airlines
  • 25/3
  • 1 total stop
  • 17h 45m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (฿2,820 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿326 potential savings vs. average return price).
Search Deals
Average for return flights in February 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 24 February 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

Fri 3/4

15:45-22:45

2 stops45h 00m

Ontario

Sat 18/4

13:27-09:35

2 stops54h 08m

฿29,381

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 20/3

16:55-17:38

2 stops38h 43m

Ontario

Mon 23/3

18:37-11:25

2 stops50h 48m

฿29,381

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 13/4

15:45-18:02

2 stops40h 17m

Ontario

Sat 25/4

18:49-09:35

2 stops24h 46m

฿29,474

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 13/4

15:45-12:20

2 stops34h 35m

Ontario

Fri 24/4

13:27-09:35

2 stops30h 08m

฿29,474

BangkokOntario

DMK - ONT

DMKONT

Bangkok Don Mueang Intl

Thu 16/4

07:30-18:00

2 stops24h 30m

Ontario

Tue 28/4

00:10-17:35

2 stops27h 25m

฿29,877

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 5/4

15:45-09:56

2 stops56h 11m

Ontario

Mon 13/4

18:49-09:35

2 stops48h 46m

฿31,241

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 29/7

10:50-18:40

1 stop21h 50m

Ontario

Sat 8/8

00:45-16:20

1 stop25h 35m

฿31,396

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 13/4

13:20-18:00

1 stop18h 40m

Ontario

Sat 18/4

00:10-09:45

1 stop19h 35m

฿32,604

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 13/4

13:20-18:00

1 stop18h 40m

Ontario

Tue 21/4

00:10-16:20

1 stop26h 10m

฿32,604

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 7/6

09:35-22:37

2 stops51h 02m

Ontario

Wed 10/6

13:50-09:35

2 stops53h 45m

฿33,069

Flights are sorted by cheapest return flights first.

Deals found on 24/2

Showing 1-10 of 39 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 20 hours 22 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 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Business Class
Premium Economy Class
Economy class

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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