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Look for other cheap flights to Ontario

$858 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 7/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
10:55 - 12:12
MEL
-
ONT
18h 17m
1 stop
United Airlines Logo
18:39 - 08:15
ONT
-
MEL
20h 36m
1 stop
$1,430United Airlines
Sat, 30 May - Tue, 16 Jun
United Airlines Logo
10:55 - 17:52
MEL
-
ONT
23h 57m
1 stop
United Airlines Logo
18:39 - 08:15
ONT
-
MEL
20h 36m
1 stop
$1,432United Airlines
Thu, 7 May - Thu, 21 May
United Airlines Logo
10:55 - 12:12
MEL
-
ONT
18h 17m
1 stop
United Airlines Logo
13:00 - 09:00
ONT
-
MEL
26h 00m
2 stops
$1,434United Airlines
Thu, 1 Oct - Tue, 27 Oct
United Airlines Logo
10:55 - 12:12
MEL
-
ONT
18h 17m
1 stop
United Airlines Logo
18:39 - 08:15
ONT
-
MEL
20h 36m
1 stop
$1,443United Airlines
Fri, 5 Jun - Sun, 14 Jun
United Airlines Logo
10:55 - 12:12
MEL
-
ONT
18h 17m
1 stop
United Airlines Logo
18:39 - 08:15
ONT
-
MEL
20h 36m
1 stop
$1,444United Airlines
Fri, 5 Jun - Sun, 14 Jun
United Airlines Logo
10:20 - 12:12
SYD
-
ONT
18h 52m
1 stop
United Airlines Logo
06:00 - 06:55
ONT
-
SYD
31h 55m
1 stop
$1,515United Airlines
Mon, 1 Jun - Mon, 15 Jun
United Airlines Logo
10:20 - 22:35
SYD
-
ONT
53h 15m
2 stops
United Airlines Logo
18:30 - 06:55
ONT
-
SYD
43h 25m
2 stops
$1,517United Airlines
Mon, 4 May - Mon, 25 May
Multiple Airlines Logo
20:45 - 21:28
SYD
-
ONT
18h 43m
1 stop
Multiple Airlines Logo
09:00 - 19:45
ONT
-
SYD
39h 45m
1 stop
$1,583Multiple Airlines
Tue, 13 Oct - Wed, 11 Nov
China Airlines Logo
22:50 - 18:40
BNE
-
ONT
36h 50m
1 stop
China Airlines Logo
00:45 - 10:35
ONT
-
BNE
40h 50m
1 stop
$2,198China Airlines
Fri, 28 Aug - Mon, 7 Sep
China Airlines Logo
14:25 - 18:40
ADL
-
ONT
44h 45m
2 stops
China Airlines Logo
00:10 - 16:25
ONT
-
ADL
47h 45m
2 stops
$2,870China Airlines
Mon, 14 Sep - Mon, 28 Sep

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 24 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
Fastest return journey

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sat 30/5

10:55-12:12

1 stop18h 17m

Ontario

Tue 16/6

18:39-08:15

1 stop20h 36m

$1,430

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Thu 7/5

10:55-17:52

1 stop23h 57m

Ontario

Thu 21/5

18:39-08:15

1 stop20h 36m

$1,432

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Thu 1/10

10:55-12:12

1 stop18h 17m

Ontario

Tue 27/10

13:00-09:00

2 stops26h 00m

$1,434

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Fri 5/6

10:55-12:12

1 stop18h 17m

Ontario

Sun 14/6

18:39-08:15

1 stop20h 36m

$1,443

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Fri 5/6

10:55-12:12

1 stop18h 17m

Ontario

Sun 14/6

18:39-08:15

1 stop20h 36m

$1,444

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 1/6

10:20-12:12

1 stop18h 52m

Ontario

Mon 15/6

06:00-06:55

1 stop31h 55m

$1,515

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 4/5

10:20-22:35

2 stops53h 15m

Ontario

Mon 25/5

18:30-06:55

2 stops43h 25m

$1,517

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 13/10

20:45-21:28

1 stop18h 43m

Ontario

Wed 11/11

09:00-19:45

1 stop39h 45m

$1,583

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Fri 28/8

22:50-18:40

1 stop36h 50m

Ontario

Mon 7/9

00:45-10:35

1 stop40h 50m

$2,198

AdelaideOntario

ADL - ONT

ADLONT

Adelaide

Mon 14/9

14:25-18:40

2 stops44h 45m

Ontario

Mon 28/9

00:10-16:25

2 stops47h 45m

$2,870

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 14h 10m. 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

$858

Best Round-Trip Price

$1,430

Fastest flight time

22h 07m
The best one-way flight price to Ontario from Australia in the last 72 hours is $858 (Melbourne to Ontario).
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The best round-trip flight price to Ontario from Australia in the last 72 hours is $1,430 (Melbourne to Ontario).
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The fastest flight to Ontario from Australia takes 22h 07m (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 $83 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 $136. This is 48% 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 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 $1,083
Melbourne to Ontario Flightsfrom $1,022
Brisbane to Ontario Flightsfrom $1,421
Perth to Ontario Flightsfrom $1,433
Coolangatta Gold Coast to Ontario Flightsfrom $1,458
Adelaide to Ontario Flightsfrom $1,411