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฿16,075+ 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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
12 Aug — 19 Aug1
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 13 July 2026.

Wed 2/913:20
BKK
-
ONT
1 stop19h 20m
China Airlines
Tue 15/900:10
ONT
-
BKK
1 stop26h 10m
China Airlines
Deal found 8/7฿27,101
Tue 1/917:30
BKK
-
ONT
1 stop39h 10m
China Airlines
Sat 3/1000:10
ONT
-
BKK
1 stop26h 10m
China Airlines
Deal found 9/7฿27,134
Sat 19/913:20
BKK
-
ONT
1 stop18h 40m
China Airlines
Thu 8/1000:10
ONT
-
BKK
1 stop19h 35m
China Airlines
Deal found 11/7฿27,201
Mon 26/1002:35
BKK
-
ONT
1 stop29h 30m
China Airlines
Sat 31/1023:50
ONT
-
BKK
1 stop23h 15m
China Airlines
Deal found 11/7฿27,300
Mon 5/1013:10
BKK
-
ONT
1 stop17h 55m
STARLUX Airlines
Mon 30/1121:45
ONT
-
BKK
1 stop27h 45m
STARLUX Airlines
Deal found 11/7฿27,765
Wed 7/1017:30
BKK
-
ONT
1 stop38h 30m
China Airlines
Tue 20/1000:10
ONT
-
BKK
1 stop22h 00m
China Airlines
Deal found 10/7฿27,898
Sat 12/1213:45
BKK
-
ONT
1 stop17h 10m
STARLUX Airlines
Sat 2/121:45
ONT
-
BKK
1 stop23h 50m
STARLUX Airlines
Deal found 12/7฿28,297
Wed 4/1113:45
BKK
-
ONT
1 stop17h 10m
STARLUX Airlines
Mon 16/1121:45
ONT
-
BKK
1 stop23h 50m
STARLUX Airlines
Deal found 10/7฿28,330
Thu 27/813:20
BKK
-
ONT
1 stop19h 20m
China Airlines
Tue 8/900:45
ONT
-
BKK
1 stop21h 25m
China Airlines
Deal found 9/7฿30,190
Mon 24/802:40
BKK
-
ONT
1 stop30h 00m
China Airlines
Wed 20/122:50
ONT
-
BKK
1 stop26h 55m
China Airlines
Deal found 11/7฿30,356
Tue 10/1119:25
DMK
-
ONT
2 stops35h 30m
Multiple Airlines
Mon 3/523:10
ONT
-
DMK
1 stop32h 10m
Multiple Airlines
Deal found 8/7฿44,039
Tue 28/706:40
DMK
-
ONT
2 stops26h 00m
Multiple Airlines
Mon 10/800:45
ONT
-
DMK
2 stops23h 25m
Multiple Airlines
Deal found 9/7฿45,467

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 13 July 2026.

Return from

฿26,636

One-way from

฿16,108

Popular in

July

Cheapest in

September

Average price

฿30,356
China Airlines
  • China Airlines
  • 13/10-24/12
  • 2 total stops
  • 37h 25m total
  • Bangkok to Los Angeles
Search Deals
China Airlines
  • China Airlines
  • 2/9
  • 1 total stop
  • 21h 50m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (฿2,994 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿332 potential savings vs. average return price).
Search Deals
Average for return flights in July 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 13 July 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

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 2/9

13:20-18:40

1 stop19h 20m

Ontario

Tue 15/9

00:10-16:20

1 stop26h 10m

฿27,101
Fastest return journey

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sat 19/9

13:20-18:00

1 stop18h 40m

Ontario

Thu 8/10

00:10-09:45

1 stop19h 35m

฿27,201

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 2/9

13:10-17:05

1 stop17h 55m

Ontario

Wed 16/9

12:12-12:00

2 stops33h 48m

฿31,087

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 24/9

17:50-18:00

2 stops38h 10m

Ontario

Sat 26/9

00:10-12:10

1 stop22h 00m

฿32,515

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 24/9

09:35-10:23

2 stops62h 48m

Ontario

Sun 27/9

06:00-09:35

2 stops37h 35m

฿32,548

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 2/9

09:35-20:01

2 stops24h 26m

Ontario

Wed 16/9

13:56-09:35

2 stops29h 39m

฿32,913

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 7/8

10:50-18:40

1 stop21h 50m

Ontario

Thu 27/8

00:45-09:45

1 stop19h 00m

฿32,980

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 6/10

03:00-18:03

2 stops29h 03m

Ontario

Wed 21/10

11:13-07:35

2 stops30h 22m

฿35,869

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 29/7

15:45-22:37

2 stops44h 52m

Ontario

Sat 1/8

13:50-23:55

2 stops44h 05m

฿36,334

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 4/8

13:20-18:40

1 stop19h 20m

Ontario

Fri 14/8

00:45-09:45

1 stop19h 00m

฿37,131

Flights are sorted by cheapest return flights first.

Deals found on 11/7

Showing 1-10 of 31 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 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.

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 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

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 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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