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Flights to Ontario

€333 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 2/9. 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.
Iberia Logo
09:50 - 22:59DUB  Dublin-ONT Ontario
21h 09m2 stops Madrid Barajas Dallas/Fort Worth
Iberia Logo
12:37 - 09:45ONT  Ontario-DUB Dublin
13h 08m1 stop Dallas/Fort Worth
€611Iberia
Tue, 8 Sep - Thu, 24 Sep
Iberia Logo
12:40 - 22:59DUB  Dublin-ONT Ontario
18h 19m1 stop Dallas/Fort Worth
Iberia Logo
12:37 - 09:45ONT  Ontario-DUB Dublin
13h 08m1 stop Dallas/Fort Worth
€614Iberia
Tue, 8 Sep - Thu, 24 Sep
British Airways Logo
10:20 - 22:49DUB  Dublin-ONT Ontario
20h 29m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
15:09 - 19:40ONT  Ontario-DUB Dublin
20h 31m2 stops Dallas/Fort Worth London Heathrow
€616British Airways
Wed, 20 Jan - Sun, 24 Jan
British Airways Logo
08:50 - 22:49DUB  Dublin-ONT Ontario
21h 59m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
15:09 - 15:05ONT  Ontario-DUB Dublin
15h 56m2 stops Dallas/Fort Worth London Heathrow
€616British Airways
Wed, 20 Jan - Sun, 24 Jan
British Airways Logo
10:20 - 22:49DUB  Dublin-ONT Ontario
20h 29m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
15:09 - 19:40ONT  Ontario-DUB Dublin
20h 31m2 stops Dallas/Fort Worth London Heathrow
€617British Airways
Wed, 20 Jan - Sun, 24 Jan
Multiple Airlines Logo
12:40 - 18:47DUB  Dublin-ONT Ontario
14h 07m1 stop Dallas/Fort Worth
Multiple Airlines Logo
10:25 - 09:45ONT  Ontario-DUB Dublin
15h 20m1 stop Dallas/Fort Worth
€618Multiple Airlines
Fri, 28 Aug - Thu, 10 Sep
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
€618Multiple Airlines
Fri, 28 Aug - Sat, 12 Sep
JetBlue Logo
11:30 - 22:38DUB  Dublin-ONT Ontario
19h 08m1 stop New York John F Kennedy Intl
JetBlue Logo
23:59 - 09:00ONT  Ontario-DUB Dublin
25h 01m1 stop New York John F Kennedy Intl
€622JetBlue
Thu, 27 Aug - Mon, 31 Aug
American Airlines Logo
12:55 - 21:11DUB  Dublin-ONT Ontario
15h 16m1 stop Dallas/Fort Worth
American Airlines Logo
10:30 - 07:15ONT  Ontario-DUB Dublin
12h 45m1 stop Dallas/Fort Worth
€625American Airlines
Wed, 28 Oct - Wed, 4 Nov
Iberia Logo
09:50 - 22:59DUB  Dublin-ONT Ontario
21h 09m2 stops Madrid Barajas Dallas/Fort Worth
Iberia Logo
08:25 - 09:45ONT  Ontario-DUB Dublin
17h 20m1 stop Dallas/Fort Worth
€625Iberia
Fri, 28 Aug - Fri, 11 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 13,528 searches and data was last updated on 7 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

Tue 8/9

09:50-22:59

2 stops21h 09m

Ontario

Thu 24/9

12:37-09:45

1 stop13h 08m

€611

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Tue 8/9

12:40-22:59

1 stop18h 19m

Ontario

Thu 24/9

12:37-09:45

1 stop13h 08m

€614

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Wed 20/1

10:20-22:49

2 stops20h 29m

Ontario

Sun 24/1

15:09-19:40

2 stops20h 31m

€616

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Wed 20/1

08:50-22:49

2 stops21h 59m

Ontario

Sun 24/1

15:09-15:05

2 stops15h 56m

€616

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Wed 20/1

10:20-22:49

2 stops20h 29m

Ontario

Sun 24/1

15:09-19:40

2 stops20h 31m

€617

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Fri 28/8

12:40-18:47

1 stop14h 07m

Ontario

Thu 10/9

10:25-09:45

1 stop15h 20m

€618
Fastest return journey

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Fri 28/8

12:40-18:47

1 stop14h 07m

Ontario

Sat 12/9

12:37-09:45

1 stop13h 08m

€618

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Thu 27/8

11:30-22:38

1 stop19h 08m

Ontario

Mon 31/8

23:59-09:00

1 stop25h 01m

€622

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Wed 28/10

12:55-21:11

1 stop15h 16m

Ontario

Wed 4/11

10:30-07:15

1 stop12h 45m

€625

DublinOntario

DUB Dublin - ONT Ontario

DUBONT

Dublin

Fri 28/8

09:50-22:59

2 stops21h 09m

Ontario

Fri 11/9

08:25-09:45

1 stop17h 20m

€625

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

€392

Best Round-Trip Price

€611

Fastest flight time

19h 08m
The best one-way flight price to Ontario from Ireland in the last 5 days is €392 (Dublin to Ontario).
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The best return flight price to Ontario from Ireland in the last 5 days is €611 (Dublin to Ontario).
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The fastest flight to Ontario from Ireland takes 19h 08m (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).

Is there a cheaper alternative to flying into Ontario?

Burbank Bob Hope Airport has an average price of €331 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

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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 €712
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