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฿16,988+ 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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
8 May — 15 May1
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 8 April 2026.

Sat 12/913:10
BKK
-
ONT
1 stop17h 55m
STARLUX Airlines
Mon 21/923:10
ONT
-
BKK
1 stop27h 30m
STARLUX Airlines
Deal found 6/4฿29,257
Wed 14/1013:10
BKK
-
ONT
1 stop17h 55m
STARLUX Airlines
Wed 28/1022:45
ONT
-
BKK
1 stop23h 50m
STARLUX Airlines
Deal found 7/4฿29,322
Wed 9/909:35
BKK
-
ONT
2 stops40h 37m
United Airlines
Sun 13/913:44
ONT
-
BKK
2 stops48h 51m
United Airlines
Deal found 6/4฿29,550
Mon 27/407:00
BKK
-
ONT
2 stops24h 47m
United Airlines
Tue 28/413:27
ONT
-
BKK
2 stops30h 08m
United Airlines
Deal found 5/4฿29,615
Sun 30/809:35
BKK
-
ONT
2 stops51h 23m
United Airlines
Tue 15/908:00
ONT
-
BKK
2 stops25h 55m
United Airlines
Deal found 4/4฿29,778
Wed 14/1009:35
BKK
-
ONT
2 stops27h 31m
United Airlines
Thu 29/1018:53
ONT
-
BKK
2 stops26h 32m
United Airlines
Deal found 7/4฿29,811
Sun 4/1009:35
BKK
-
ONT
2 stops51h 31m
United Airlines
Sat 24/1013:33
ONT
-
BKK
2 stops31h 52m
United Airlines
Deal found 4/4฿29,876
Thu 7/515:45
BKK
-
ONT
2 stops34h 37m
United Airlines
Wed 21/1006:00
ONT
-
BKK
2 stops32h 35m
United Airlines
Deal found 6/4฿29,908
Sat 12/907:00
BKK
-
ONT
2 stops25h 11m
United Airlines
Mon 21/919:13
ONT
-
BKK
2 stops24h 22m
United Airlines
Deal found 6/4฿30,006
Sun 4/1010:50
BKK
-
ONT
1 stop21h 10m
China Airlines
Fri 23/1000:10
ONT
-
BKK
1 stop22h 55m
China Airlines
Deal found 4/4฿30,104
Fri 10/407:30
DMK
-
ONT
2 stops24h 30m
Multiple Airlines
Sun 12/400:10
ONT
-
DMK
2 stops32h 55m
Multiple Airlines
Deal found 3/4฿38,240
Sun 3/508:35
DMK
-
ONT
2 stops23h 25m
Multiple Airlines
Sat 9/500:10
ONT
-
DMK
2 stops28h 00m
Multiple Airlines
Deal found 3/4฿47,547

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 8 April 2026.

Return from

฿22,683

One-way from

฿16,988

Popular in

July

Cheapest in

September

Average price

฿26,263
United Airlines
  • United Airlines
  • 21/6-27/7
  • 3 total stops
  • 63h 24m total
  • Bangkok to Los Angeles
Search Deals
STARLUX Airlines
  • STARLUX Airlines
  • 6/5
  • 1 total stop
  • 17h 55m total
  • Bangkok to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (฿2,614 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿328 potential savings vs. average return price).
Search Deals
Average for return flights in April 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 8 April 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 9/9

09:35-18:11

2 stops46h 36m

Ontario

Sun 13/9

13:44-04:35

2 stops48h 51m

฿29,550

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Mon 28/9

09:35-17:47

2 stops46h 12m

Ontario

Tue 1/12

18:53-00:20

2 stops38h 27m

฿29,648

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 18/8

07:00-18:11

2 stops25h 11m

Ontario

Tue 25/8

05:00-23:55

2 stops28h 55m

฿34,041

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 16/9

10:50-18:00

1 stop21h 10m

Ontario

Tue 6/10

00:10-13:20

2 stops23h 10m

฿35,246

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 9/9

17:50-18:40

2 stops38h 50m

Ontario

Sat 12/9

00:45-12:10

1 stop21h 25m

฿37,198
Fastest return journey

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Thu 23/4

13:20-18:00

1 stop18h 40m

Ontario

Sun 26/4

00:10-09:45

1 stop19h 35m

฿37,947

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Tue 26/5

19:00-18:47

2 stops37h 47m

Ontario

Wed 3/6

12:06-06:50

2 stops28h 44m

฿38,012

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Sun 30/8

10:50-18:40

1 stop21h 50m

Ontario

Mon 14/9

00:45-13:20

2 stops22h 35m

฿39,053

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Fri 17/4

02:30-23:59

2 stops35h 29m

Ontario

Mon 11/5

10:39-06:50

2 stops30h 11m

฿40,030

BangkokOntario

BKK - ONT

BKKONT

Bangkok Suvarnabhumi

Wed 6/5

13:20-18:00

1 stop18h 40m

Ontario

Mon 29/6

00:10-09:45

1 stop19h 35m

฿41,331

Flights are sorted by cheapest return flights first.

Deals found on 7/4

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
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 47 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 55 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
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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