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Cheap flights from Ontario to Ireland from $355

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 9/19. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
12:37 pm - 9:45 am
ONT
-
DUB
13h 08m
1 stop
Iberia Logo
12:40 pm - 9:11 pm
DUB
-
ONT
16h 31m
1 stop
$365Iberia
Wed, Sep 23 - Wed, Oct 7
JetBlue Logo
11:59 pm - 9:00 am
ONT
-
DUB
25h 01m
1 stop
JetBlue Logo
11:30 am - 8:57 pm
DUB
-
ONT
17h 27m
1 stop
$730JetBlue
Mon, Aug 24 - Wed, Sep 9
JetBlue Logo
11:59 pm - 9:00 am
ONT
-
DUB
25h 01m
1 stop
JetBlue Logo
11:30 am - 10:38 pm
DUB
-
ONT
19h 08m
1 stop
$797JetBlue
Thu, Aug 20 - Thu, Aug 27
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
12:30 pm - 12:50 pm
SNN
-
ONT
32h 20m
2 stops
$806United Airlines
Tue, Sep 8 - Tue, Sep 15
JetBlue Logo
11:59 pm - 9:00 am
ONT
-
DUB
25h 01m
1 stop
JetBlue Logo
11:30 am - 10:38 pm
DUB
-
ONT
19h 08m
1 stop
$815JetBlue
Thu, Aug 13 - Thu, Aug 27
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 10:59 pm
SNN
-
ONT
21h 29m
1 stop
$826United Airlines
Fri, Sep 4 - Thu, Sep 17
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
12:30 pm - 9:59 pm
SNN
-
ONT
17h 29m
2 stops
$826United Airlines
Fri, Sep 4 - Thu, Sep 17
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 10:59 pm
SNN
-
ONT
21h 29m
1 stop
$832United Airlines
Fri, Sep 4 - Thu, Sep 17
American Airlines Logo
12:33 pm - 9:45 am
ONT
-
DUB
13h 12m
1 stop
American Airlines Logo
12:40 pm - 6:47 pm
DUB
-
ONT
14h 07m
1 stop
$874American Airlines
Sun, Aug 23 - Tue, Sep 8
American Airlines Logo
12:33 pm - 9:45 am
ONT
-
DUB
13h 12m
1 stop
American Airlines Logo
12:40 pm - 6:47 pm
DUB
-
ONT
14h 07m
1 stop
$875American Airlines
Sun, Aug 23 - Tue, Sep 8

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American Airlines flights from Ontario to Ireland

Our best American Airlines deals on Ontario to Ireland flight tickets
American Airlines
Aug 23
ONT12:33 pmOntario
13h 12m
1 stop
DUB9:45 amDublin
Sep 8
DUB12:40 pmDublin
14h 07m
1 stop
ONT6:47 pmOntario
$874
American Airlines
Aug 23
ONT12:33 pmOntario
13h 12m
1 stop
DUB9:45 amDublin
Sep 8
DUB12:40 pmDublin
14h 07m
1 stop
ONT6:47 pmOntario
$875
American Airlines
Aug 24
ONT12:33 pmOntario
13h 12m
1 stop
DUB9:45 amDublin
Sep 8
DUB12:40 pmDublin
14h 07m
1 stop
ONT6:47 pmOntario
$877

United Airlines flights from Ontario to Ireland

Our best United Airlines deals on Ontario to Ireland flight tickets
United Airlines
Sep 8
ONT7:00 amOntario
16h 30m
1 stop
SNN7:30 amShannon
Sep 15
SNN12:30 pmShannon
32h 20m
2 stops
ONT12:50 pmOntario
$806
United Airlines
Sep 4
ONT7:00 amOntario
16h 30m
1 stop
SNN7:30 amShannon
Sep 17
SNN12:30 pmShannon
17h 29m
2 stops
ONT9:59 pmOntario
$826
United Airlines
Sep 4
ONT7:00 amOntario
16h 30m
1 stop
SNN7:30 amShannon
Sep 17
SNN12:30 pmShannon
18h 21m
2 stops
ONT10:51 pmOntario
$832

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 July 29, 2026.
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

Cheapest round-trip

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 9/23

12:37 pm-9:45 am

1 stop13h 08m

Dublin

Wed 10/7

12:40 pm-9:11 pm

1 stop16h 31m

$365

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 8/24

11:59 pm-9:00 am

1 stop25h 01m

Dublin

Wed 9/9

11:30 am-8:57 pm

1 stop17h 27m

$730

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 8/20

11:59 pm-9:00 am

1 stop25h 01m

Dublin

Thu 8/27

11:30 am-10:38 pm

1 stop19h 08m

$797

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Tue 9/8

7:00 am-7:30 am

1 stop16h 30m

Shannon

Tue 9/15

12:30 pm-12:50 pm

2 stops32h 20m

$806

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 8/13

11:59 pm-9:00 am

1 stop25h 01m

Dublin

Thu 8/27

11:30 am-10:38 pm

1 stop19h 08m

$815

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 9/4

7:00 am-7:30 am

1 stop16h 30m

Shannon

Thu 9/17

9:30 am-10:59 pm

1 stop21h 29m

$826

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 9/4

7:00 am-7:30 am

1 stop16h 30m

Shannon

Thu 9/17

12:30 pm-9:59 pm

2 stops17h 29m

$826

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 9/4

7:00 am-7:30 am

1 stop16h 30m

Shannon

Thu 9/17

9:30 am-10:59 pm

1 stop21h 29m

$832
Quickest round-trip

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 8/23

12:33 pm-9:45 am

1 stop13h 12m

Dublin

Tue 9/8

12:40 pm-6:47 pm

1 stop14h 07m

$874

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 8/23

12:33 pm-9:45 am

1 stop13h 12m

Dublin

Tue 9/8

12:40 pm-6:47 pm

1 stop14h 07m

$875

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

Can stopping save me money on Ontario to Ireland flights?

You could potentially save up to 50% 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

14h 15m

Direct flights

None
The fastest flight from Ontario to Ireland takes 14h 15m
There are no direct flights from Ontario to Ireland. There are no popular flight routes from Ontario to Ireland.
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Frequently asked questions about flying from Ontario to Ireland

  • 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
American AirlinesPriceFrom $728Free CancellationRating
7.1
11,839 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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