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$678+ Cheap flights to Ontario

— ONT
4 Dec — 11 Dec1
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

Mon 9/1111:50 -
1 stop19h 39m
Sun 22/1113:35 -
1 stop24h 45m
Deal found 2/11$1,173
Mon 9/1111:50 -
1 stop19h 39m
Mon 23/1116:17 -
1 stop22h 03m
Deal found 1/11$1,175
Mon 2/1111:50 -
1 stop19h 39m
Mon 9/1116:17 -
1 stop22h 03m
Deal found 1/11$1,176
Mon 2/1111:50 -
1 stop19h 39m
Sun 15/1118:37 -
1 stop19h 43m
Deal found 30/10$1,178
Tue 24/1111:50 -
1 stop22h 43m
Tue 29/1218:27 -
1 stop40h 53m
Deal found 3/11$1,186
Mon 2/1111:50 -
1 stop19h 39m
Sun 15/1116:17 -
1 stop22h 03m
Deal found 29/10$1,188
Mon 9/1111:50 -
1 stop19h 39m
Sun 22/1116:17 -
1 stop22h 03m
Deal found 3/11$1,189

Find flight deals to Ontario

Return from

$987

One-way from

$678

Popular in

December

Cheapest in

August

Average price

$1,128
Alaska Airlines
  • Alaska Airlines
  • 12/11-15/11
  • 3 total stops
  • 58h 03m total
  • Sydney to Los Angeles
Search Deals
Lufthansa
  • Lufthansa
  • 7/12-31/12
  • 1 total stop
  • 16h 48m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($109 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average return price).
Search Deals
Average for return flights in November 2026
Search Deals

Cheapflights Fare Finder

 
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

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Thu 21/1

11:50-21:00

2 stops28h 10m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$683

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 16/3

11:50-17:41

1 stop23h 51m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$683

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 19/1

13:20-20:01

1 stop25h 41m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$683

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Mon 8/2

11:50-17:35

1 stop24h 45m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$758

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Sat 23/1

11:50-21:00

2 stops28h 10m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$765

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Sat 14/11

11:50-12:29

1 stop19h 39m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$768

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Sun 15/11

09:15-20:51

2 stops30h 36m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$768

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Fri 25/12

11:50-21:00

2 stops28h 10m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$845
Fastest return journey

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Sun 21/3

21:40-21:28

1 stop17h 48m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$1,096

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 2/3

21:40-11:09

2 stops32h 29m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$1,254

Flights are sorted by cheapest return flights first.

Deals found on 31/10

Showing 1-10 of 21 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

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

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
7.3
Good
10,460 reviews
Check prices

Food

6.7

Entertainment

7.1

Overall

7.3

Crew

8.1

Boarding

7.7

Comfort

7.3

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
7.3
Good
10,460 reviews
United Airlines
7.3
Good
10,460 reviews
Check prices

Food

6.7

Entertainment

7.1

Overall

7.3

Crew

8.1

Boarding

7.7

Comfort

7.3

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 27 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

Browse thousands of different options on Cheapflights for your next trip

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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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