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Flights to Ontario

€410 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 17/9. 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
1 adult, Economy, 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.
British Airways Logo
08:50 - 22:45DUB  Dublin-ONT Ontario
21h 55m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
14:22 - 19:45ONT  Ontario-DUB Dublin
21h 23m2 stops Dallas/Fort Worth London Heathrow
€614British Airways
Fri, 5 Feb - Mon, 8 Feb
Multiple Airlines Logo
12:40 - 11:47DUB  Dublin-ONT Ontario
31h 07m1 stop Dallas/Fort Worth
Multiple Airlines Logo
23:10 - 09:35ONT  Ontario-DUB Dublin
26h 25m1 stop Charlotte Douglas
€617Multiple Airlines
Mon, 28 Sep - Mon, 5 Oct
Iberia Logo
12:40 - 22:37DUB  Dublin-ONT Ontario
17h 57m1 stop Dallas/Fort Worth
Iberia Logo
14:22 - 09:45ONT  Ontario-DUB Dublin
35h 23m1 stop Dallas/Fort Worth
€623Iberia
Fri, 2 Oct - Fri, 9 Oct
Iberia Logo
12:40 - 20:09DUB  Dublin-ONT Ontario
15h 29m1 stop Dallas/Fort Worth
Iberia Logo
10:25 - 09:45ONT  Ontario-DUB Dublin
15h 20m1 stop Dallas/Fort Worth
€623Iberia
Tue, 29 Sep - Tue, 6 Oct
British Airways Logo
10:50 - 22:45DUB  Dublin-ONT Ontario
19h 55m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
12:43 - 17:05ONT  Ontario-DUB Dublin
20h 22m2 stops Dallas/Fort Worth London Heathrow
€626British Airways
Fri, 5 Feb - Mon, 8 Feb
British Airways Logo
08:50 - 22:45DUB  Dublin-ONT Ontario
21h 55m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
10:31 - 15:25ONT  Ontario-DUB Dublin
20h 54m2 stops Dallas/Fort Worth London Heathrow
€627British Airways
Fri, 5 Feb - Mon, 8 Feb
Iberia Logo
12:40 - 21:09DUB  Dublin-ONT Ontario
16h 29m1 stop Dallas/Fort Worth
Iberia Logo
10:25 - 09:45ONT  Ontario-DUB Dublin
15h 20m1 stop Dallas/Fort Worth
€627Iberia
Thu, 1 Oct - Thu, 15 Oct
Multiple Airlines Logo
12:40 - 18:47DUB  Dublin-ONT Ontario
14h 07m1 stop Dallas/Fort Worth
Multiple Airlines Logo
12:37 - 09:45ONT  Ontario-DUB Dublin
13h 08m1 stop Dallas/Fort Worth
€628Multiple Airlines
Thu, 3 Sep - Wed, 16 Sep
Multiple Airlines Logo
12:40 - 18:53DUB  Dublin-ONT Ontario
14h 13m1 stop Dallas/Fort Worth
Multiple Airlines Logo
16:29 - 19:20ONT  Ontario-DUB Dublin
18h 51m2 stops Phoenix Sky Harbor Intl London Heathrow
€631Multiple Airlines
Thu, 1 Oct - Thu, 15 Oct
American Airlines Logo
12:40 - 09:29DUB  Dublin-ONT Ontario
28h 49m1 stop Dallas/Fort Worth
American Airlines Logo
07:00 - 09:45ONT  Ontario-DUB Dublin
18h 45m1 stop Dallas/Fort Worth
€633American Airlines
Mon, 28 Sep - Mon, 5 Oct

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 18 August 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 Dublin - ONT Ontario

DUBONT

Dublin

Fri 5/2

08:50-22:45

2 stops21h 55m

Ontario

Mon 8/2

14:22-19:45

2 stops21h 23m

€614

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Mon 28/9

12:40-11:47

1 stop31h 07m

Ontario

Mon 5/10

23:10-09:35

1 stop26h 25m

€617

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Fri 2/10

12:40-22:37

1 stop17h 57m

Ontario

Fri 9/10

14:22-09:45

1 stop35h 23m

€623

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Tue 29/9

12:40-20:09

1 stop15h 29m

Ontario

Tue 6/10

10:25-09:45

1 stop15h 20m

€623

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Fri 5/2

10:50-22:45

2 stops19h 55m

Ontario

Mon 8/2

12:43-17:05

2 stops20h 22m

€626

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Fri 5/2

08:50-22:45

2 stops21h 55m

Ontario

Mon 8/2

10:31-15:25

2 stops20h 54m

€627

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Thu 1/10

12:40-21:09

1 stop16h 29m

Ontario

Thu 15/10

10:25-09:45

1 stop15h 20m

€627
Fastest return journey

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Thu 3/9

12:40-18:47

1 stop14h 07m

Ontario

Wed 16/9

12:37-09:45

1 stop13h 08m

€628

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Thu 1/10

12:40-18:53

1 stop14h 13m

Ontario

Thu 15/10

16:29-19:20

2 stops18h 51m

€631

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Mon 28/9

12:40-09:29

1 stop28h 49m

Ontario

Mon 5/10

07:00-09:45

1 stop18h 45m

€633

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 takes 11h on average. On the other hand, flying from Cork to 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

€410

Best Round-Trip Price

€614

Fastest flight time

34h 05m
The best one-way flight price to Ontario from Ireland in the last 5 days is €410 (Dublin to Ontario).
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The best return flight price to Ontario from Ireland in the last 5 days is €614 (Dublin to Ontario).
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The fastest flight to Ontario from Ireland takes 34h 05m (Cork 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?

Burbank Bob Hope Airport has an average price of €329 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.

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 €726
Cork to Ontario Flightsfrom €903