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Flights to Ontario

€440 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 2/6. 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.
Iberia Logo
09:30 - 22:36
DUB
-
ONT
21h 06m
1 stop
Iberia Logo
10:55 - 09:45
ONT
-
DUB
14h 50m
1 stop
€468Iberia
Fri, 10 Apr - Sun, 19 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
€480American Airlines
Mon, 13 Apr - Mon, 27 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
€507American Airlines
Thu, 9 Apr - Wed, 22 Apr
Iberia Logo
09:30 - 22:36
DUB
-
ONT
21h 06m
1 stop
Iberia Logo
10:59 - 09:45
ONT
-
DUB
14h 46m
1 stop
€508Iberia
Fri, 10 Apr - Fri, 24 Apr
JetBlue Logo
11:40 - 22:09
DUB
-
ONT
18h 29m
1 stop
JetBlue Logo
22:00 - 09:00
ONT
-
DUB
27h 00m
1 stop
€565JetBlue
Sat, 16 May - Tue, 26 May
British Airways Logo
06:30 - 16:22
DUB
-
ONT
17h 52m
2 stops
British Airways Logo
14:08 - 16:35
ONT
-
DUB
18h 27m
2 stops
€573British Airways
Thu, 23 Apr - Thu, 30 Apr
Multiple Airlines Logo
12:50 - 23:59
DUB
-
ONT
19h 09m
2 stops
Multiple Airlines Logo
10:59 - 12:00
ONT
-
DUB
17h 01m
2 stops
€605Multiple Airlines
Fri, 3 Apr - Mon, 13 Apr
American Airlines Logo
09:30 - 18:37
DUB
-
ONT
17h 07m
1 stop
American Airlines Logo
07:30 - 08:40
ONT
-
DUB
17h 10m
2 stops
€629American Airlines
Thu, 23 Apr - Thu, 30 Apr
Multiple Airlines Logo
09:30 - 10:04
DUB
-
ONT
32h 34m
1 stop
Multiple Airlines Logo
12:19 - 19:35
ONT
-
DUB
23h 16m
2 stops
€635Multiple Airlines
Fri, 24 Apr - Fri, 1 May
British Airways Logo
12:30 - 23:46
DUB
-
ONT
19h 16m
2 stops
British Airways Logo
06:00 - 09:00
ONT
-
DUB
19h 00m
2 stops
€639British Airways
Thu, 9 Apr - Wed, 22 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 13,528 searches and data was last updated on 11 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

Fri 10/4

09:30-22:36

1 stop21h 06m

Ontario

Sun 19/4

10:55-09:45

1 stop14h 50m

€468
Fastest return journey

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 13/4

09:30-18:37

1 stop17h 07m

Ontario

Mon 27/4

10:59-09:45

1 stop14h 46m

€480

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 9/4

09:30-18:37

1 stop17h 07m

Ontario

Wed 22/4

10:59-09:45

1 stop14h 46m

€507

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 10/4

09:30-22:36

1 stop21h 06m

Ontario

Fri 24/4

10:59-09:45

1 stop14h 46m

€508

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 16/5

11:40-22:09

1 stop18h 29m

Ontario

Tue 26/5

22:00-09:00

1 stop27h 00m

€565

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 23/4

06:30-16:22

2 stops17h 52m

Ontario

Thu 30/4

14:08-16:35

2 stops18h 27m

€573

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 3/4

12:50-23:59

2 stops19h 09m

Ontario

Mon 13/4

10:59-12:00

2 stops17h 01m

€605

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 23/4

09:30-18:37

1 stop17h 07m

Ontario

Thu 30/4

07:30-08:40

2 stops17h 10m

€629

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 24/4

09:30-10:04

1 stop32h 34m

Ontario

Fri 1/5

12:19-19:35

2 stops23h 16m

€635

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 9/4

12:30-23:46

2 stops19h 16m

Ontario

Wed 22/4

06:00-09:00

2 stops19h 00m

€639

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 11h on average. On the other hand, flying from Cork to Los Angeles Los Angeles takes 13h 35m 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

€440

Best Round-Trip Price

€468

Fastest flight time

17h 05m
The best one-way flight price to Ontario from Ireland in the last 72 hours is €440 (Dublin to Ontario).
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The best round-trip flight price to Ontario from Ireland in the last 72 hours is €468 (Dublin to Ontario).
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The fastest flight to Ontario from Ireland takes 17h 05m (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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Fri 10/4
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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 €590
Cork to Ontario Flightsfrom €1,051