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Cheap flights from Ontario to Ireland from $354

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 9/13. 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.
Delta Logo
7:05 am - 11:10 am
ONT
-
SNN
20h 05m
2 stops
Delta Logo
1:05 pm - 11:14 am
SNN
-
ONT
30h 09m
2 stops
$764Delta
Sun, Sep 6 - Wed, Sep 9
United Airlines Logo
6:10 am - 7:30 am
ONT
-
SNN
17h 20m
1 stop
United Airlines Logo
9:30 am - 10:35 pm
SNN
-
ONT
21h 05m
1 stop
$777United Airlines
Mon, Aug 3 - Wed, Aug 19
United Airlines Logo
7:13 pm - 10:15 am
ONT
-
SNN
55h 02m
3 stops
United Airlines Logo
9:30 am - 7:57 pm
SNN
-
ONT
18h 27m
1 stop
$780United Airlines
Fri, Sep 11 - Tue, Sep 15
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 7:57 pm
SNN
-
ONT
18h 27m
1 stop
$801United Airlines
Wed, Sep 2 - Wed, Sep 9
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 8:01 pm
SNN
-
ONT
18h 31m
2 stops
$805United Airlines
Wed, Sep 2 - Wed, Sep 9
Multiple Airlines Logo
12:00 pm - 8:45 am
ONT
-
DUB
12h 45m
1 stop
Multiple Airlines Logo
11:00 am - 6:18 pm
DUB
-
ONT
15h 18m
1 stop
$823Multiple Airlines
Wed, Oct 14 - Wed, Oct 21
KLM Logo
7:00 am - 11:10 am
ONT
-
SNN
20h 10m
2 stops
KLM Logo
1:05 pm - 11:37 pm
SNN
-
ONT
18h 32m
2 stops
$859KLM
Tue, Sep 8 - Wed, Sep 16
JetBlue Logo
11:50 pm - 9:00 am
ONT
-
DUB
25h 10m
1 stop
JetBlue Logo
11:30 am - 10:35 pm
DUB
-
ONT
19h 05m
1 stop
$866JetBlue
Sun, Aug 23 - Tue, Sep 8
American Airlines Logo
12:35 pm - 9:45 am
ONT
-
DUB
13h 10m
1 stop
American Airlines Logo
12:40 pm - 6:47 pm
DUB
-
ONT
14h 07m
1 stop
$871American Airlines
Mon, Aug 3 - Wed, Aug 19
American Airlines Logo
12:35 pm - 9:45 am
ONT
-
DUB
13h 10m
1 stop
American Airlines Logo
12:40 pm - 6:47 pm
DUB
-
ONT
14h 07m
1 stop
$872American Airlines
Mon, Aug 3 - Wed, Aug 19

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JetBlue flights from Ontario to Ireland

Our best JetBlue deals on Ontario to Ireland flight tickets
JetBlue
Aug 23
ONT11:50 pmOntario
25h 10m
1 stop
DUB9:00 amDublin
Sep 8
DUB11:30 amDublin
19h 05m
1 stop
ONT10:35 pmOntario
$866
JetBlue
Sep 4
ONT11:50 pmOntario
25h 10m
1 stop
DUB9:00 amDublin
Sep 8
DUB11:30 amDublin
19h 05m
1 stop
ONT10:35 pmOntario
$877
JetBlue
Aug 23
ONT11:50 pmOntario
25h 10m
1 stop
DUB9:00 amDublin
Sep 1
DUB11:30 amDublin
19h 05m
1 stop
ONT10:35 pmOntario
$896

American Airlines flights from Ontario to Ireland

Our best American Airlines deals on Ontario to Ireland flight tickets
American Airlines
Aug 3
ONT12:35 pmOntario
13h 10m
1 stop
DUB9:45 amDublin
Aug 19
DUB12:40 pmDublin
14h 07m
1 stop
ONT6:47 pmOntario
$871
American Airlines
Aug 3
ONT12:35 pmOntario
13h 10m
1 stop
DUB9:45 amDublin
Aug 19
DUB12:40 pmDublin
14h 07m
1 stop
ONT6:47 pmOntario
$872
American Airlines
Aug 3
ONT12:35 pmOntario
13h 10m
1 stop
DUB9:45 amDublin
Aug 19
DUB12:40 pmDublin
14h 07m
1 stop
ONT6:47 pmOntario
$873

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 June 14, 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

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sun 9/6

7:05 am-11:10 am

2 stops20h 05m

Shannon

Wed 9/9

1:05 pm-11:14 am

2 stops30h 09m

$764

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 8/3

6:10 am-7:30 am

1 stop17h 20m

Shannon

Wed 8/19

9:30 am-10:35 pm

1 stop21h 05m

$777

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 9/11

7:13 pm-10:15 am

3 stops55h 02m

Shannon

Tue 9/15

9:30 am-7:57 pm

1 stop18h 27m

$780

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 9/2

7:00 am-7:30 am

1 stop16h 30m

Shannon

Wed 9/9

9:30 am-7:57 pm

1 stop18h 27m

$801

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 9/2

7:00 am-7:30 am

1 stop16h 30m

Shannon

Wed 9/9

9:30 am-8:01 pm

2 stops18h 31m

$805

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/14

12:00 pm-8:45 am

1 stop12h 45m

Dublin

Wed 10/21

11:00 am-6:18 pm

1 stop15h 18m

$823

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Tue 9/8

7:00 am-11:10 am

2 stops20h 10m

Shannon

Wed 9/16

1:05 pm-11:37 pm

2 stops18h 32m

$859

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 8/23

11:50 pm-9:00 am

1 stop25h 10m

Dublin

Tue 9/8

11:30 am-10:35 pm

1 stop19h 05m

$866
Quickest round-trip

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 8/3

12:35 pm-9:45 am

1 stop13h 10m

Dublin

Wed 8/19

12:40 pm-6:47 pm

1 stop14h 07m

$871

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 8/3

12:35 pm-9:45 am

1 stop13h 10m

Dublin

Wed 8/19

12:40 pm-6:47 pm

1 stop14h 07m

$872

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 8% 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 57m

Direct flights

None
The fastest flight from Ontario to Ireland takes 12h 57m
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
11,654 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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