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Cheap flights from Ontario to Ireland from $446

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Ireland departing on 5/1. 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 Ontario to Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:05 am - 8:10 am
ONT
-
DUB
19h 05m2 stops
United Airlines Logo
9:00 am - 9:58 pm
DUB
-
ONT
44h 58m2 stops
$629United Airlines
Wed, Jan 7 - Wed, Jan 14
British Airways Logo
3:09 pm - 3:20 pm
ONT
-
DUB
16h 11m2 stops
British Airways Logo
8:40 pm - 6:45 pm
DUB
-
ONT
30h 05m2 stops
$636British Airways
Mon, Jan 26 - Mon, Feb 9
British Airways Logo
12:55 pm - 2:45 pm
ONT
-
DUB
17h 50m2 stops
British Airways Logo
7:45 pm - 5:46 pm
DUB
-
ONT
30h 01m2 stops
$640British Airways
Tue, Apr 14 - Wed, Apr 22
Multiple Airlines Logo
10:56 am - 9:45 am
ONT
-
DUB
14h 49m1 stop
Multiple Airlines Logo
12:40 pm - 8:18 pm
DUB
-
ONT
15h 38m1 stop
$647Multiple Airlines
Tue, Mar 31 - Tue, Apr 14
Air Canada Logo
5:10 am - 8:15 am
ONT
-
DUB
19h 05m2 stops
Air Canada Logo
9:50 am - 8:46 pm
DUB
-
ONT
18h 56m2 stops
$649Air Canada
Tue, Mar 31 - Tue, Apr 14
Air Canada Logo
5:15 am - 6:10 am
ONT
-
DUB
17h 55m2 stops
Air Canada Logo
8:00 am - 8:50 pm
DUB
-
ONT
19h 50m2 stops
$654Air Canada
Tue, Mar 10 - Wed, Mar 25
Multiple Airlines Logo
12:55 pm - 9:45 am
ONT
-
DUB
12h 50m1 stop
Multiple Airlines Logo
12:40 pm - 8:18 pm
DUB
-
ONT
15h 38m1 stop
$657Multiple Airlines
Mon, Apr 13 - Wed, Apr 29
United Airlines Logo
11:59 pm - 8:10 am
ONT
-
DUB
25h 11m1 stop
United Airlines Logo
10:40 am - 10:25 pm
DUB
-
ONT
18h 45m1 stop
$660United Airlines
Sun, Mar 15 - Tue, Mar 24
British Airways Logo
5:06 pm - 4:45 pm
ONT
-
SNN
15h 39m2 stops
British Airways Logo
7:50 am - 10:49 pm
SNN
-
ONT
22h 59m2 stops
$663British Airways
Thu, Feb 12 - Wed, Feb 18
British Airways Logo
4:45 pm - 7:40 pm
ONT
-
DUB
18h 55m2 stops
British Airways Logo
8:40 pm - 5:22 pm
DUB
-
ONT
28h 42m2 stops
$664British Airways
Sun, Jan 11 - Sat, Jan 17

United Airlines flights from Ontario to Ireland

Our best United Airlines deals on Ontario to Ireland flight tickets
United Airlines
Jan 7
ONT5:05 amOntario
19h 05m
2 stops
DUB8:10 amDublin
Jan 14
DUB9:00 amDublin
44h 58m
2 stops
ONT9:58 pmOntario
$629
Find similar
United Airlines
Mar 15
ONT11:59 pmOntario
25h 11m
1 stop
DUB8:10 amDublin
Mar 24
DUB10:40 amDublin
18h 45m
1 stop
ONT10:25 pmOntario
$660
Find similar
United Airlines
Dec 24
ONT11:59 pmOntario
24h 11m
1 stop
DUB8:10 amDublin
Jan 8
DUB9:30 amDublin
19h 28m
2 stops
ONT8:58 pmOntario
$679
Find similar

British Airways flights from Ontario to Ireland

Our best British Airways deals on Ontario to Ireland flight tickets
British Airways
Jan 26
ONT3:09 pmOntario
16h 11m
2 stops
DUB3:20 pmDublin
Feb 9
DUB8:40 pmDublin
30h 05m
2 stops
ONT6:45 pmOntario
$636
Find similar
British Airways
Apr 14
ONT12:55 pmOntario
17h 50m
2 stops
DUB2:45 pmDublin
Apr 22
DUB7:45 pmDublin
30h 01m
2 stops
ONT5:46 pmOntario
$640
Find similar
British Airways
Feb 12
ONT5:06 pmOntario
15h 39m
2 stops
SNN4:45 pmShannon
Feb 18
SNN7:50 amShannon
22h 59m
2 stops
ONT10:49 pmOntario
$663
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 11, 2025.
Use the filters below to find and compare flights from Ontario to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 1/7

5:05 am-8:10 am

2 stops19h 05m

Dublin

Wed 1/14

9:00 am-9:58 pm

2 stops44h 58m

$629

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 1/26

3:09 pm-3:20 pm

2 stops16h 11m

Dublin

Mon 2/9

8:40 pm-6:45 pm

2 stops30h 05m

$636

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 4/14

12:55 pm-2:45 pm

2 stops17h 50m

Dublin

Wed 4/22

7:45 pm-5:46 pm

2 stops30h 01m

$640

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 3/31

10:56 am-9:45 am

1 stop14h 49m

Dublin

Tue 4/14

12:40 pm-8:18 pm

1 stop15h 38m

$647

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 3/31

5:10 am-8:15 am

2 stops19h 05m

Dublin

Tue 4/14

9:50 am-8:46 pm

2 stops18h 56m

$649

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 3/10

5:15 am-6:10 am

2 stops17h 55m

Dublin

Wed 3/25

8:00 am-8:50 pm

2 stops19h 50m

$654

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 4/13

12:55 pm-9:45 am

1 stop12h 50m

Dublin

Wed 4/29

12:40 pm-8:18 pm

1 stop15h 38m

$657

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 3/15

11:59 pm-8:10 am

1 stop25h 11m

Dublin

Tue 3/24

10:40 am-10:25 pm

1 stop18h 45m

$660

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 2/12

5:06 pm-4:45 pm

2 stops15h 39m

Shannon

Wed 2/18

7:50 am-10:49 pm

2 stops22h 59m

$663

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 1/11

4:45 pm-7:40 pm

2 stops18h 55m

Dublin

Sat 1/17

8:40 pm-5:22 pm

2 stops28h 42m

$664

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ireland from

How to get the cheapest flight ticket from Ontario to Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Ireland?

The cheapest day to depart on your flight to Ireland is on a Wednesday when prices can be found for as low as $726. This is often the case because there is less demand to fly during this day of the week. Flights from Ontario to Ireland on a Friday will generally be more expensive and average around $927. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ireland?

According to our data, the cheapest time of day to fly to Ireland is at noon. momondo users have found flights departing from Ontario to Ireland at noon for as low as $818. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Ireland is in the morning when prices are around $871.

Can stopping save me money on Ontario to Ireland flights?

You could potentially save up to 22% on your flight if you consider stops on a Ontario to Ireland flight.

Cheap Ontario to Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Ireland

Fastest flight time

12h 23m

Direct flights

None
The fastest flight from Ontario to Ireland takes 12h 23m
There are no direct flights from Ontario to Ireland. There are no popular flight routes from Ontario to Ireland.
Search flight deals

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

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

  • How many operators does momondo search for flights from Ontario Airport to Ireland?

  • How old do you have to be to fly from Ontario Airport to Ireland?

    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 layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Ireland.

  • What documentation or ID do you need to fly to Ireland?

    The necessary travel and health documents for your Ireland trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Ireland

Compare and see reviews for airlines that fly from Ontario to Ireland with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $527Free CancellationRating
7.9
8,005 reviews
Search Delta flights
IberiaPriceFrom $547Free CancellationRating
7.0
3,045 reviews
Search Iberia flights
American AirlinesPriceFrom $677Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ireland from Ontario.

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

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

How can momondo help me find flights from Ontario to Ireland?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Ireland.

I’m not ready to book a flight from Ontario to Ireland right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Ireland flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Ireland trip

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Find better results for your trip to Ireland

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