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Cheap flights from Ontario to Ireland from $368

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 10/20. 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

American Airlines Logo
10:38 am - 4:45 pmONT-SNN
22h 07m2 stops
American Airlines Logo
7:50 am - 9:40 pmSNN-ONT
21h 50m2 stops
$576American Airlines
Find Deal
Mon, Feb 16 - Tue, Feb 24
KLM Logo
11:36 am - 8:45 amONT-DUB
13h 09m1 stop
KLM Logo
9:45 am - 7:19 pmDUB-ONT
17h 34m1 stop
$641KLM
Find Deal
Mon, Oct 20 - Wed, Nov 5
Air France Logo
11:36 am - 8:45 amONT-DUB
13h 09m1 stop
Air France Logo
9:45 am - 7:19 pmDUB-ONT
17h 34m1 stop
$642Air France
Find Deal
Mon, Oct 20 - Wed, Nov 5
British Airways Logo
2:51 pm - 5:00 pmONT-DUB
19h 09m2 stops
British Airways Logo
10:30 am - 9:59 pmDUB-ONT
19h 29m2 stops
$648British Airways
Find Deal
Wed, Oct 29 - Thu, Nov 6
KLM Logo
11:36 am - 8:45 amONT-DUB
13h 09m1 stop
KLM Logo
9:45 am - 7:19 pmDUB-ONT
17h 34m1 stop
$649KLM
Find Deal
Mon, Oct 20 - Wed, Nov 5
British Airways Logo
2:51 pm - 5:00 pmONT-DUB
19h 09m2 stops
British Airways Logo
10:30 am - 9:59 pmDUB-ONT
19h 29m2 stops
$650British Airways
Find Deal
Wed, Oct 29 - Thu, Nov 6
United Airlines Logo
7:00 am - 8:10 amONT-DUB
18h 10m1 stop
United Airlines Logo
12:05 pm - 10:51 pmDUB-ONT
18h 46m2 stops
$652United Airlines
Find Deal
Wed, Oct 29 - Thu, Nov 6
Iberia Logo
10:57 am - 9:45 amONT-DUB
14h 48m1 stop
Iberia Logo
12:55 pm - 11:57 pmDUB-ONT
19h 02m1 stop
$675Iberia
Find Deal
Mon, Oct 20 - Sun, Nov 2
Iberia Logo
10:57 am - 9:45 amONT-DUB
14h 48m1 stop
Iberia Logo
12:55 pm - 10:42 pmDUB-ONT
16h 47m1 stop
$681Iberia
Find Deal
Sun, Oct 19 - Sat, Nov 1
American Airlines Logo
11:55 pm - 6:20 amONT-SNN
22h 25m2 stops
American Airlines Logo
7:50 am - 9:40 pmSNN-ONT
21h 50m3 stops
$2,032American Airlines
Find Deal
Mon, Feb 16 - Tue, Feb 24

KLM flights from Ontario to Ireland

Our best KLM deals on Ontario to Ireland flight tickets
KLM
Oct 20
ONT11:36 amOntario
13h 09m
1 stop
DUB8:45 amDublin
Nov 5
DUB9:45 amDublin
17h 34m
1 stop
ONT7:19 pmOntario
$641
Find similar
KLM
Oct 20
ONT11:36 amOntario
13h 09m
1 stop
DUB8:45 amDublin
Nov 5
DUB9:45 amDublin
17h 34m
1 stop
ONT7:19 pmOntario
$649
Find similar
KLM
Oct 27
ONT11:36 amOntario
13h 09m
1 stop
DUB7:45 amDublin
Nov 9
DUB9:45 amDublin
17h 52m
1 stop
ONT7:37 pmOntario
$718
Find similar

Air France flights from Ontario to Ireland

Our best Air France deals on Ontario to Ireland flight tickets
Air France
Oct 20
ONT11:36 amOntario
13h 09m
1 stop
DUB8:45 amDublin
Nov 5
DUB9:45 amDublin
17h 34m
1 stop
ONT7:19 pmOntario
$642
Find similar
Air France
Aug 29
ONT9:50 amOntario
17h 20m
2 stops
SNN11:10 amShannon
Aug 31
SNN1:05 pmShannon
35h 03m
2 stops
ONT4:08 pmOntario
$1,634
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 August 27, 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

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 2/16

10:38 am-4:45 pm

2 stops22h 07m

Shannon

Tue 2/24

7:50 am-9:40 pm

2 stops21h 50m

$576

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 10/20

11:36 am-8:45 am

1 stop13h 09m

Dublin

Wed 11/5

9:45 am-7:19 pm

1 stop17h 34m

$641

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 10/20

11:36 am-8:45 am

1 stop13h 09m

Dublin

Wed 11/5

9:45 am-7:19 pm

1 stop17h 34m

$642

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

2:51 pm-5:00 pm

2 stops19h 09m

Dublin

Thu 11/6

10:30 am-9:59 pm

2 stops19h 29m

$648

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 10/20

11:36 am-8:45 am

1 stop13h 09m

Dublin

Wed 11/5

9:45 am-7:19 pm

1 stop17h 34m

$649

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

2:51 pm-5:00 pm

2 stops19h 09m

Dublin

Thu 11/6

10:30 am-9:59 pm

2 stops19h 29m

$650

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

7:00 am-8:10 am

1 stop18h 10m

Dublin

Thu 11/6

12:05 pm-10:51 pm

2 stops18h 46m

$652

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 10/20

10:57 am-9:45 am

1 stop14h 48m

Dublin

Sun 11/2

12:55 pm-11:57 pm

1 stop19h 02m

$675

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 10/19

10:57 am-9:45 am

1 stop14h 48m

Dublin

Sat 11/1

12:55 pm-10:42 pm

1 stop16h 47m

$681

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 2/16

11:55 pm-6:20 am

2 stops22h 25m

Shannon

Tue 2/24

7:50 am-9:40 pm

3 stops21h 50m

$2,032

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 month to fly to Ireland?

In general, December is the cheapest month to fly from Ontario to Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $573. If you aren’t able to travel to Ireland during the month of December, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $607.

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 19% 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

Direct flights

None
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
IberiaPriceFrom $547Free CancellationRating
7.0
2,892 reviews
Search Iberia flights
American AirlinesPriceFrom $623Free CancellationRating
7.2
10,000 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.

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Find better results for your trip to Ireland

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