Which airlines fly to Ontario?

Aer Lingus is the airline most momondo users in Ireland opt for when booking flights to Ontario. British Airways, United Airlines and American Airlines are also popular choices when flying to Ontario from Ireland. Most major airlines flying from Ireland to Ontario will offer flights on a regular basis, though your options may vary depending on what airport you fly from.

€435 Cheap Flights to Ontario in 2026

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Find the cheapest flights from Ireland to Ontario

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

11:30 - 23:59

DUB

ONT

20h 29m

2 stops

23:58 - 08:40

ONT

DUB

24h 42m

2 stops

€435American Airlines

Fri, 27 Feb - Mon, 2 Mar

11:30 - 23:59

DUB

ONT

20h 29m

2 stops

23:58 - 08:40

ONT

DUB

24h 42m

2 stops

€436American Airlines

Fri, 27 Feb - Mon, 2 Mar

11:30 - 10:06

DUB

ONT

30h 36m

2 stops

14:39 - 16:50

ONT

DUB

18h 11m

2 stops

€446American Airlines

Wed, 18 Feb - Sun, 22 Feb

05:55 - 21:05

DUB

ONT

23h 10m

2 stops

22:20 - 07:45

ONT

DUB

25h 25m

1 stop

€591KLM

Wed, 18 Feb - Sun, 22 Feb

11:40 - 22:09

DUB

ONT

18h 29m

1 stop

23:25 - 09:00

ONT

DUB

25h 35m

1 stop

€678JetBlue

Mon, 18 May - Sat, 30 May

09:50 - 22:28

DUB

ONT

20h 38m

2 stops

07:00 - 08:15

ONT

DUB

17h 15m

2 stops

€753United Airlines

Tue, 30 Jun - Sun, 12 Jul

09:50 - 20:17

DUB

ONT

18h 27m

3 stops

07:00 - 08:15

ONT

DUB

17h 15m

2 stops

€760Multiple Airlines

Tue, 30 Jun - Sun, 12 Jul

11:00 - 18:36

DUB

ONT

15h 36m

1 stop

07:00 - 08:45

ONT

DUB

17h 45m

1 stop

€765KLM

Thu, 7 May - Thu, 14 May

09:50 - 22:28

DUB

ONT

20h 38m

2 stops

06:00 - 08:15

ONT

DUB

18h 15m

2 stops

€824Multiple Airlines

Thu, 25 Jun - Wed, 8 Jul

11:00 - 18:15

DUB

ONT

15h 15m

1 stop

12:00 - 08:45

ONT

DUB

12h 45m

1 stop

€856Multiple Airlines

Mon, 6 Jul - Mon, 20 Jul

Fly from

Route

Depart

Return

Price

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 27/2

11:30-23:59

2 stops20h 29m

Ontario

Mon 2/3

23:58-08:40

2 stops24h 42m

€435

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 27/2

11:30-23:59

2 stops20h 29m

Ontario

Mon 2/3

23:58-08:40

2 stops24h 42m

€436

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 18/2

11:30-10:06

2 stops30h 36m

Ontario

Sun 22/2

14:39-16:50

2 stops18h 11m

€446

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 18/2

05:55-21:05

2 stops23h 10m

Ontario

Sun 22/2

22:20-07:45

1 stop25h 25m

€591

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 18/5

11:40-22:09

1 stop18h 29m

Ontario

Sat 30/5

23:25-09:00

1 stop25h 35m

€678

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 30/6

09:50-22:28

2 stops20h 38m

Ontario

Sun 12/7

07:00-08:15

2 stops17h 15m

€753

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 30/6

09:50-20:17

3 stops18h 27m

Ontario

Sun 12/7

07:00-08:15

2 stops17h 15m

€760

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 7/5

11:00-18:36

1 stop15h 36m

Ontario

Thu 14/5

07:00-08:45

1 stop17h 45m

€765

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 25/6

09:50-22:28

2 stops20h 38m

Ontario

Wed 8/7

06:00-08:15

2 stops18h 15m

€824

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 6/7

11:00-18:15

1 stop15h 15m

Ontario

Mon 20/7

12:00-08:45

1 stop12h 45m

€856

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 45m 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

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Cheap Ontario flight deals and tips

Summary info about Ontario flight prices, duration and airlines

Best One-Way Price	€561
Best Round-Trip Price	€435
Fastest flight time	18h 24m

The best one-way flight price to Ontario from Ireland in the last 72 hours is €561 (Dublin to Ontario).

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The best round-trip flight price to Ontario from Ireland in the last 72 hours is €435 (Dublin to Ontario).

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The fastest flight to Ontario from Ireland takes 18h 24m (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).

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.