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Look for other cheap flights to Ontario

$701 Cheap flights to Ontario

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Ontario departing on 7/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from Australia to Ontario

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
11:40 - 12:38
BNE
-
ONT
18h 58m
1 stop
United Airlines Logo
13:45 - 07:30
ONT
-
BNE
23h 45m
2 stops
$1,192United Airlines
Fri, 13 Feb - Tue, 24 Feb
United Airlines Logo
11:40 - 17:41
BNE
-
ONT
24h 01m
1 stop
United Airlines Logo
05:00 - 07:30
ONT
-
BNE
32h 30m
2 stops
$1,201United Airlines
Wed, 18 Feb - Sun, 22 Feb
United Airlines Logo
11:40 - 12:48
BNE
-
ONT
19h 08m
1 stop
United Airlines Logo
05:00 - 07:30
ONT
-
BNE
32h 30m
2 stops
$1,208United Airlines
Wed, 18 Feb - Sun, 22 Feb
Hawaiian Airlines Logo
21:40 - 22:28
SYD
-
ONT
19h 48m
1 stop
Hawaiian Airlines Logo
08:13 - 19:45
ONT
-
SYD
40h 32m
1 stop
$1,429Hawaiian Airlines
Thu, 5 Feb - Tue, 10 Feb
United Airlines Logo
14:55 - 20:50
ADL
-
ONT
24h 25m
2 stops
United Airlines Logo
18:37 - 09:30
ONT
-
ADL
20h 23m
1 stop
$1,500United Airlines
Mon, 23 Feb - Mon, 2 Mar
Multiple Airlines Logo
13:05 - 22:28
SYD
-
ONT
28h 23m
2 stops
Multiple Airlines Logo
08:13 - 19:45
ONT
-
SYD
40h 32m
1 stop
$1,520Multiple Airlines
Thu, 5 Feb - Tue, 10 Feb
United Airlines Logo
10:55 - 23:06
MEL
-
ONT
29h 11m
1 stop
United Airlines Logo
05:00 - 08:15
ONT
-
MEL
34h 15m
2 stops
$1,529United Airlines
Mon, 1 Jun - Fri, 10 Jul
Multiple Airlines Logo
21:40 - 22:28
SYD
-
ONT
19h 48m
1 stop
Multiple Airlines Logo
08:13 - 19:45
ONT
-
SYD
40h 32m
1 stop
$1,534Multiple Airlines
Thu, 5 Feb - Wed, 11 Feb
China Airlines Logo
22:50 - 18:00
BNE
-
ONT
36h 10m
1 stop
China Airlines Logo
00:10 - 10:35
ONT
-
BNE
41h 25m
1 stop
$1,697China Airlines
Thu, 7 May - Thu, 21 May
China Airlines Logo
22:50 - 18:00
BNE
-
ONT
36h 10m
1 stop
China Airlines Logo
00:10 - 10:35
ONT
-
BNE
41h 25m
1 stop
$1,820China Airlines
Sat, 25 Apr - Sat, 9 May

momondo Fare Finder

 
Locate flights to Ontario that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 78,305 searches and data was last updated on 26 January 2026.
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Route

Depart

Return

Price

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Fri 13/2

11:40-12:38

1 stop18h 58m

Ontario

Tue 24/2

13:45-07:30

2 stops23h 45m

$1,192

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Wed 18/2

11:40-17:41

1 stop24h 01m

Ontario

Sun 22/2

05:00-07:30

2 stops32h 30m

$1,201

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Wed 18/2

11:40-12:48

1 stop19h 08m

Ontario

Sun 22/2

05:00-07:30

2 stops32h 30m

$1,208

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 5/2

21:40-22:28

1 stop19h 48m

Ontario

Tue 10/2

08:13-19:45

1 stop40h 32m

$1,429

AdelaideOntario

ADL - ONT

ADLONT

Adelaide

Mon 23/2

14:55-20:50

2 stops24h 25m

Ontario

Mon 2/3

18:37-09:30

1 stop20h 23m

$1,500

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 5/2

13:05-22:28

2 stops28h 23m

Ontario

Tue 10/2

08:13-19:45

1 stop40h 32m

$1,520

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Mon 1/6

10:55-23:06

1 stop29h 11m

Ontario

Fri 10/7

05:00-08:15

2 stops34h 15m

$1,529

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 5/2

21:40-22:28

1 stop19h 48m

Ontario

Wed 11/2

08:13-19:45

1 stop40h 32m

$1,534

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Thu 7/5

22:50-18:00

1 stop36h 10m

Ontario

Thu 21/5

00:10-10:35

1 stop41h 25m

$1,697

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Sat 25/4

22:50-18:00

1 stop36h 10m

Ontario

Sat 9/5

00:10-10:35

1 stop41h 25m

$1,820

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Ontario from

Ontario flights insights and trends

Explore insights for your Ontario flight to craft the best travel plan

How long does it take to fly to Ontario?

Flight times from Australia to Ontario vary, but if you’re flying out of Sydney Kingsford Smith and flying into Los Angeles (one of the most popular routes), then the duration is 13h 40m on average. Another popular route from Australia to Ontario is flying from Melbourne to Los Angeles, which will take roughly 12h 20m. Keep in mind that layovers or delays could extend your travel time.

Cheapest flights to Ontario

Find the cheapest flights to Ontario from your nearest city or airport

Cheap Ontario flight deals and tips

Summary info about Ontario flight prices, duration and airlines

Best One-Way Price

$701

Best Round-Trip Price

$1,192

Fastest flight time

23h 30m
The best one-way flight price to Ontario from Australia in the last 72 hours is $701 (Brisbane to Ontario).
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The best round-trip flight price to Ontario from Australia in the last 72 hours is $1,192 (Brisbane to Ontario).
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The fastest flight to Ontario from Australia takes 23h 30m (Coolangatta Gold Coast to Ontario).
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Frequently asked questions about flying to Ontario

Is there an alternative airport near Ontario?

Finding an alternative and possibly cheaper destination airport near Ontario is possible. If you are planning a flight to Ontario, consider booking flights to Ontario Airport (5 km from Ontario city centre), San Bernardino Int Airport (38 km from Ontario city centre), Santa Ana J. Wayne/Orange Cnty Airport (47 km from Ontario city centre), Long Beach Municipal Airport (54 km from Ontario city centre) or Burbank Bob Hope Airport (67 km from Ontario city centre).

Is there a cheaper alternative to flying into Ontario?

Santa Ana J. Wayne/Orange Cnty Airport has an average price of $65 per person and is typically the cheapest airport to fly into when visiting Ontario. This average price does vary based on departure city. Try momondo’s Airport-to-Airport Pricing Tool to find the cheapest flight.

What is the absolute cheapest flight to Ontario?

The best deal found on momondo in the last two weeks was a flight to Ontario from Phoenix for $43. This is 81% cheaper than most flight deals to Ontario. To find the cheapest price to Ontario from your area, use momondo’s Airport-to-Airport Pricing Tool.

When did momondo last update prices for flights to Ontario Airport?

Prices for flights to Ontario Airport are updated daily.

How many operators does momondo search for flights to Ontario Airport?

The number of operators available for flights to Ontario Airport is 1 as of January 2026.

How old do you have to be to fly to Ontario Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal to Ontario?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight to Ontario. momondo saves you time and could save you money on your trip.

Can I find flights to Ontario with flexible booking policies on momondo?

All flight searches to Ontario on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights to Ontario?

Once all potential Ontario flight options are in front of you momondo lets you sort and filter flights based on preferences such as airline, price and flight times, amongst many other options.

I’m not ready to book a flight to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Ontario trip

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Find better results for your trip to Ontario

Popular Flights to Ontario

Popular routes according to searches in the past day on momondo
Sydney Kingsford Smith to Ontario Flightsfrom $986
Melbourne to Ontario Flightsfrom $1,055
Brisbane to Ontario Flightsfrom $829
Perth to Ontario Flightsfrom $1,242
Adelaide to Ontario Flightsfrom $1,273
Coolangatta Gold Coast to Ontario Flightsfrom $1,956