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$857+ 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
4 Mar — 11 Mar1
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 2 February 2026.

Tue 17/309:40
SYD
-
ONT
2 stops32h 11m
Delta
Tue 24/313:20
ONT
-
SYD
2 stops22h 45m
Delta
Deal found 31/1$1,329
Mon 9/212:10
SYD
-
ONT
1 stop18h 08m
United Airlines
Tue 17/213:50
ONT
-
SYD
1 stop24h 25m
United Airlines
Deal found 1/2$1,404
Mon 2/212:10
SYD
-
ONT
1 stop18h 08m
United Airlines
Sun 15/218:37
ONT
-
SYD
1 stop19h 38m
United Airlines
Deal found 1/2$1,405
Wed 11/212:10
SYD
-
ONT
2 stops27h 48m
United Airlines
Tue 17/213:45
ONT
-
SYD
2 stops46h 15m
United Airlines
Deal found 30/1$1,409
Sat 28/211:50
SYD
-
ONT
1 stop29h 09m
United Airlines
Mon 16/318:37
ONT
-
SYD
1 stop20h 38m
United Airlines
Deal found 1/2$1,454
Fri 10/410:20
SYD
-
ONT
1 stop29h 25m
United Airlines
Sat 18/413:34
ONT
-
SYD
2 stops48h 21m
United Airlines
Deal found 31/1$1,460
Wed 22/710:20
SYD
-
ONT
1 stop19h 00m
United Airlines
Thu 20/818:53
ONT
-
SYD
1 stop19h 02m
United Airlines
Deal found 30/1$1,471
Fri 10/410:20
SYD
-
ONT
2 stops52h 30m
United Airlines
Fri 17/413:43
ONT
-
SYD
2 stops24h 12m
United Airlines
Deal found 31/1$1,504

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 647,157 searches and data was last updated on 2 February 2026.

Return from

$1,013

One-way from

$857

Popular in

December

Cheapest in

August

Average price

$1,102
Fiji Airways
  • Fiji Airways
  • 12/2-19/2
  • 2 total stops
  • 36h 00m total
  • Sydney to Los Angeles
Search Deals
Hawaiian Airlines
  • Hawaiian Airlines
  • 5/3
  • 1 total stop
  • 19h 35m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($102 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($30 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 647,157 searches and data was last updated on 2 February 2026.
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Sydney

Route

Depart

Return

Price

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 17/3

09:40-23:51

2 stops32h 11m

Ontario

Tue 24/3

13:20-06:05

2 stops22h 45m

$1,329

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 18/3

12:10-12:18

1 stop18h 08m

Ontario

Wed 25/3

13:50-06:20

2 stops22h 30m

$1,404

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 29/4

10:20-17:47

1 stop24h 27m

Ontario

Tue 5/5

13:40-06:55

2 stops48h 15m

$1,404

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 9/3

12:10-12:18

1 stop18h 08m

Ontario

Sun 22/3

18:37-09:15

1 stop20h 38m

$1,409

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 2/3

12:10-12:38

1 stop19h 28m

Ontario

Mon 9/3

18:37-09:15

1 stop20h 38m

$1,409

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 28/2

11:50-21:59

1 stop29h 09m

Ontario

Sat 7/3

13:50-06:20

2 stops45h 30m

$1,454

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 27/2

14:00-12:38

1 stop17h 38m

Ontario

Mon 16/3

18:37-09:15

1 stop20h 38m

$1,454

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 28/2

11:50-21:59

1 stop29h 09m

Ontario

Mon 16/3

18:37-09:15

1 stop20h 38m

$1,454

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 10/4

10:20-22:45

1 stop29h 25m

Ontario

Sat 18/4

07:00-06:55

2 stops54h 55m

$1,460

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 22/7

10:20-12:20

1 stop19h 00m

Ontario

Sat 22/8

18:53-06:55

1 stop19h 02m

$1,471

Flights are sorted by cheapest return flights first.

Deals found on 1/2

Showing 1-10 of 21 results
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2
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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

What are the cheapest airlines that fly to Ontario?

The cheapest airline flying from Sydney to Ontario is United Airlines.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 2 February 2026.
Read reviews from past customers who have flown United Airlines to the United States. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,229 reviews
Check prices

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,229 reviews
United Airlines
7.4
Good
9,229 reviews
Check prices

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

FAQs about flying to Ontario

  • What airport do you fly into for flights to Ontario?

    Most people fly into Ontario (ONT) if they book a flight to Ontario. Ontario is conveniently located just 4.9 km from Ontario’s 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.

  • What is the best airline to fly to Ontario?

    Based on reviews from Cheapflights users, United Airlines is rated the highest out of the airlines that fly to Ontario.

  • Where does the fastest flight to Ontario depart from?

    For those looking to save time traveling to Ontario, Brisbane offers the quickest one-way flight (16 hours 11 minutes).

  • Does Ontario have car hire?

    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?

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Can Cheapflights find flights to Ontario with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights to Ontario flexibly with Cheapflights today.

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Yes! Start tracking prices for Ontario flights today and get alerted when prices change. To subscribe and begin receiving alerts, click the bell icon next to the flight deals above and provide your email address.

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