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Flights to Ontario

€328 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 16/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ireland to Ontario

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
09:30 - 23:46
DUB
-
ONT
22h 16m
1 stop
Multiple Airlines Logo
10:59 - 12:00
ONT
-
DUB
17h 01m
2 stops
€519Multiple Airlines
Thu, 9 Apr - Mon, 13 Apr
Multiple Airlines Logo
13:00 - 21:59
DUB
-
ONT
16h 59m
2 stops
Multiple Airlines Logo
10:59 - 12:00
ONT
-
DUB
17h 01m
2 stops
€520Multiple Airlines
Thu, 9 Apr - Mon, 13 Apr
Iberia Logo
09:30 - 23:46
DUB
-
ONT
22h 16m
1 stop
Iberia Logo
10:59 - 09:45
ONT
-
DUB
14h 46m
1 stop
€532Iberia
Thu, 9 Apr - Sun, 26 Apr
American Airlines Logo
09:30 - 18:37
DUB
-
ONT
17h 07m
1 stop
American Airlines Logo
10:59 - 09:45
ONT
-
DUB
14h 46m
1 stop
€533American Airlines
Mon, 13 Apr - Sun, 26 Apr
American Airlines Logo
09:30 - 18:37
DUB
-
ONT
17h 07m
1 stop
American Airlines Logo
10:59 - 09:45
ONT
-
DUB
14h 46m
1 stop
€534American Airlines
Mon, 13 Apr - Sun, 26 Apr
American Airlines Logo
09:30 - 10:04
DUB
-
ONT
32h 34m
1 stop
American Airlines Logo
06:00 - 06:30
ONT
-
DUB
16h 30m
2 stops
€536American Airlines
Fri, 10 Apr - Tue, 14 Apr
American Airlines Logo
11:45 - 21:07
DUB
-
ONT
17h 22m
1 stop
American Airlines Logo
06:15 - 06:30
ONT
-
DUB
16h 15m
2 stops
€546American Airlines
Fri, 17 Apr - Tue, 21 Apr
Iberia Logo
09:30 - 22:36
DUB
-
ONT
21h 06m
1 stop
Iberia Logo
07:30 - 09:45
ONT
-
DUB
18h 15m
1 stop
€553Iberia
Thu, 16 Apr - Sun, 26 Apr
British Airways Logo
20:30 - 22:36
ORK
-
ONT
34h 06m
2 stops
British Airways Logo
07:30 - 10:45
ONT
-
ORK
19h 15m
2 stops
€808British Airways
Sun, 26 Apr - Mon, 4 May
British Airways Logo
11:25 - 21:59
ORK
-
ONT
18h 34m
2 stops
British Airways Logo
10:59 - 10:45
ONT
-
ORK
15h 46m
2 stops
€1,117British Airways
Sun, 26 Apr - Mon, 4 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 13,528 searches and data was last updated on 31 March 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

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 9/4

09:30-23:46

1 stop22h 16m

Ontario

Mon 13/4

10:59-12:00

2 stops17h 01m

€519

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 9/4

13:00-21:59

2 stops16h 59m

Ontario

Mon 13/4

10:59-12:00

2 stops17h 01m

€520

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 9/4

09:30-23:46

1 stop22h 16m

Ontario

Sun 26/4

10:59-09:45

1 stop14h 46m

€532
Fastest return journey

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 13/4

09:30-18:37

1 stop17h 07m

Ontario

Sun 26/4

10:59-09:45

1 stop14h 46m

€533

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 13/4

09:30-18:37

1 stop17h 07m

Ontario

Sun 26/4

10:59-09:45

1 stop14h 46m

€534

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 10/4

09:30-10:04

1 stop32h 34m

Ontario

Tue 14/4

06:00-06:30

2 stops16h 30m

€536

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 17/4

11:45-21:07

1 stop17h 22m

Ontario

Tue 21/4

06:15-06:30

2 stops16h 15m

€546

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 16/4

09:30-22:36

1 stop21h 06m

Ontario

Sun 26/4

07:30-09:45

1 stop18h 15m

€553

CorkOntario

ORK - ONT

ORKONT

Cork

Sun 26/4

20:30-22:36

2 stops34h 06m

Ontario

Mon 4/5

07:30-10:45

2 stops19h 15m

€808

CorkOntario

ORK - ONT

ORKONT

Cork

Sun 26/4

11:25-21:59

2 stops18h 34m

Ontario

Mon 4/5

10:59-10:45

2 stops15h 46m

€1,117

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 vary depending on what airport in Ireland you fly out of and what airport in Ontario you fly into. For example, flying from Dublin to Los Angeles Los Angeles takes 10h 50m on average. On the other hand, flying from Cork to Los Angeles Los Angeles takes 16h 30m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo to see if there are any available for your route.

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

€328

Best Round-Trip Price

€519

Fastest flight time

18h 25m
The best one-way flight price to Ontario from Ireland in the last 72 hours is €328 (Dublin to Ontario).
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The best round-trip flight price to Ontario from Ireland in the last 72 hours is €519 (Dublin to Ontario).
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The fastest flight to Ontario from Ireland takes 18h 25m (Dublin 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).

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

Prices for flights to Ontario Airport are refreshed on a daily basis.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel to Ontario Airport.

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

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

Finding the right flight to Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights to Ontario?

Once you have performed a search for flights to Ontario, momondo helps you find the right flight by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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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
Dublin to Ontario Flightsfrom €596
Cork to Ontario Flightsfrom €1,021