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Look for other cheap flights to Ontario

$624 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 1/3. 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 - 20:58
BNE
-
ONT
27h 18m2 stops
United Airlines Logo
05:05 - 07:30
ONT
-
BNE
32h 25m2 stops
$1,199United Airlines
Thu, 5 Feb - Mon, 9 Feb
United Airlines Logo
11:40 - 12:48
BNE
-
ONT
43h 08m2 stops
United Airlines Logo
05:05 - 07:30
ONT
-
BNE
32h 25m2 stops
$1,201United Airlines
Thu, 5 Feb - Mon, 9 Feb
United Airlines Logo
11:40 - 20:58
BNE
-
ONT
27h 18m2 stops
United Airlines Logo
13:24 - 07:30
ONT
-
BNE
24h 06m2 stops
$1,202United Airlines
Mon, 26 Jan - Mon, 2 Feb
United Airlines Logo
11:40 - 17:51
BNE
-
ONT
24h 11m1 stop
United Airlines Logo
13:53 - 07:30
ONT
-
BNE
23h 37m1 stop
$1,211United Airlines
Sat, 24 Jan - Sat, 31 Jan
United Airlines Logo
11:40 - 11:18
BNE
-
ONT
17h 38m1 stop
United Airlines Logo
13:53 - 07:30
ONT
-
BNE
23h 37m1 stop
$1,213United Airlines
Fri, 23 Jan - Mon, 26 Jan
Multiple Airlines Logo
20:45 - 21:27
SYD
-
ONT
17h 42m1 stop
Multiple Airlines Logo
08:00 - 18:50
ONT
-
SYD
17h 50m1 stop
$1,576Multiple Airlines
Thu, 14 May - Sat, 23 May
Multiple Airlines Logo
20:45 - 21:15
SYD
-
ONT
17h 30m1 stop
Multiple Airlines Logo
08:00 - 18:50
ONT
-
SYD
17h 50m1 stop
$1,587Multiple Airlines
Tue, 28 Apr - Wed, 20 May
China Airlines Logo
21:50 - 18:00
MEL
-
ONT
37h 10m1 stop
China Airlines Logo
00:45 - 10:40
ONT
-
MEL
40h 55m1 stop
$1,795China Airlines
Wed, 10 Jun - Tue, 30 Jun
China Airlines Logo
23:20 - 16:50
MEL
-
ONT
36h 30m1 stop
China Airlines Logo
23:50 - 12:05
ONT
-
MEL
42h 15m1 stop
$1,849China Airlines
Fri, 6 Mar - Tue, 10 Mar
Alaska Airlines Logo
23:55 - 21:55
PER
-
ONT
37h 00m2 stops
Alaska Airlines Logo
09:50 - 19:05
ONT
-
PER
66h 15m2 stops
$2,127Alaska Airlines
Mon, 6 Apr - Tue, 14 Apr

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 13 December 2025.
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

Thu 5/2

11:40-20:58

2 stops27h 18m

Ontario

Mon 9/2

05:05-07:30

2 stops32h 25m

$1,199

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Thu 5/2

11:40-12:48

2 stops43h 08m

Ontario

Mon 9/2

05:05-07:30

2 stops32h 25m

$1,201

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Mon 26/1

11:40-20:58

2 stops27h 18m

Ontario

Mon 2/2

13:24-07:30

2 stops24h 06m

$1,202

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Sat 24/1

11:40-17:51

1 stop24h 11m

Ontario

Sat 31/1

13:53-07:30

1 stop23h 37m

$1,211

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Fri 23/1

11:40-11:18

1 stop17h 38m

Ontario

Mon 26/1

13:53-07:30

1 stop23h 37m

$1,213

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 14/5

20:45-21:27

1 stop17h 42m

Ontario

Sat 23/5

08:00-18:50

1 stop17h 50m

$1,576

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 28/4

20:45-21:15

1 stop17h 30m

Ontario

Wed 20/5

08:00-18:50

1 stop17h 50m

$1,587

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Wed 10/6

21:50-18:00

1 stop37h 10m

Ontario

Tue 30/6

00:45-10:40

1 stop40h 55m

$1,795

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Fri 6/3

23:20-16:50

1 stop36h 30m

Ontario

Tue 10/3

23:50-12:05

1 stop42h 15m

$1,849

PerthOntario

PER - ONT

PERONT

Perth

Mon 6/4

23:55-21:55

2 stops37h 00m

Ontario

Tue 14/4

09:50-19:05

2 stops66h 15m

$2,127

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

What is the cheapest day to depart on your flight to Ontario?

According to our data, Monday is the cheapest day to fly to Ontario from Australia. The lowest ticket price found for a Monday departure recently was $1,385. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Wednesday is the most expensive day to depart from Australia because it is more convenient for both business and leisure travellers. As a result, prices tend to be around $1,820.

What is the cheapest time of day to depart on your flight to Ontario?

Flying to Ontario from Australia in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,621 when looking at flights departing in the evening. Try not to purchase tickets in the morning because they tend to be around $1,648. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheapest flights to Ontario

Find the cheapest flights to Ontario from your nearest city or airport
Find flights from Sydney to Los Angeles
CHEAPEST MONTH TO FLY TO ONTARIO FROM SYDNEYSeptember4% cheaperFlying from Sydney to Ontario costs on average just $1,174 in September
MOST EXPENSIVE MONTH TO FLY TO ONTARIO FROM SYDNEYJune47% more expensiveIt costs about $1,801 for flights to Ontario from Sydney in June
MOST POPULAR MONTH TO FLY TO ONTARIO FROM SYDNEYJune800% more users visitedMore momondo users searched in flights to Ontario from Sydney in June than any other month

Cheap Ontario flight deals and tips

Summary info about Ontario flight prices, duration and airlines

Best One-Way Price

$624

Best Round-Trip Price

$1,199

Fastest flight time

19h 35m
The best one-way flight price to Ontario from Australia in the last 72 hours is $624 (Melbourne to Ontario).
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The best round-trip flight price to Ontario from Australia in the last 72 hours is $1,199 (Brisbane to Ontario).
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The fastest flight to Ontario from Australia takes 19h 35m (Sydney Kingsford Smith to Ontario).
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Frequently asked questions about flying to Ontario

What is the cheapest month to fly to Ontario?

The month of August is another great option to travel to Ontario, with average flight prices from Australia averaging around $1,235.

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?

Ontario Airport has an average price of $146 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 Las Vegas for $88. This is 63% 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 December 2025.

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.

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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
Melbourne to Ontario Flightsfrom $1,028
Brisbane to Ontario Flightsfrom $799
Sydney Kingsford Smith to Ontario Flightsfrom $1,016
Perth to Ontario Flightsfrom $1,225
Adelaide to Ontario Flightsfrom $1,199
Coolangatta Gold Coast to Ontario Flightsfrom $1,936