Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to Ireland from $326

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 1/9. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 - 10:20 amONT-DUB
21h 15m2 stops
United Airlines Logo
9:00 am - 10:31 pmDUB-ONT
45h 31m2 stops
$529United Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12
United Airlines Logo
7:00 am - 8:10 amONT-DUB
17h 10m1 stop
United Airlines Logo
9:00 am - 10:31 pmDUB-ONT
45h 31m2 stops
$549United Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12
KLM Logo
7:05 am - 7:45 amONT-DUB
16h 40m1 stop
KLM Logo
9:45 am - 7:42 pmDUB-ONT
17h 57m1 stop
$553KLM
Find Deal
Wed, Nov 12 - Wed, Nov 19
Delta Logo
11:10 am - 7:45 amONT-DUB
12h 35m1 stop
Delta Logo
10:45 am - 9:14 pmDUB-ONT
18h 29m2 stops
$557Delta
Find Deal
Sun, Dec 28 - Tue, Jan 13
United Airlines Logo
11:59 pm - 8:10 amONT-DUB
24h 11m1 stop
United Airlines Logo
10:40 am - 8:58 pmDUB-ONT
18h 18m2 stops
$563United Airlines
Find Deal
Sat, Dec 27 - Tue, Jan 13
United Airlines Logo
7:00 am - 8:10 amONT-DUB
17h 10m1 stop
United Airlines Logo
12:05 pm - 10:51 pmDUB-ONT
18h 46m2 stops
$577United Airlines
Find Deal
Wed, Nov 5 - Tue, Nov 11
Iberia Logo
10:47 am - 7:10 amONT-DUB
12h 23m1 stop
Iberia Logo
12:55 pm - 10:28 pmDUB-ONT
17h 33m1 stop
$678Iberia
Find Deal
Sat, Dec 6 - Sat, Dec 13
Iberia Logo
12:55 pm - 9:45 amONT-DUB
12h 50m1 stop
Iberia Logo
1:45 pm - 9:56 pmDUB-ONT
16h 11m1 stop
$690Iberia
Find Deal
Wed, Apr 8 - Sun, Apr 19
Delta Logo
1:00 pm - 10:35 pmONT-ORK
25h 35m2 stops
Delta Logo
6:00 am - 5:15 pmORK-ONT
19h 15m2 stops
$697Delta
Find Deal
Wed, Apr 1 - Sun, Apr 5
American Airlines Logo
3:09 pm - 3:45 pmONT-SNN
17h 36m2 stops
American Airlines Logo
7:40 am - 11:43 pmSNN-ONT
24h 03m2 stops
$773American Airlines
Find Deal
Fri, Mar 27 - Tue, Mar 31

United Airlines flights from Ontario to Ireland

Our best United Airlines deals on Ontario to Ireland flight tickets
United Airlines
Nov 5
ONT5:05 amOntario
21h 15m
2 stops
DUB10:20 amDublin
Nov 12
DUB9:00 amDublin
45h 31m
2 stops
ONT10:31 pmOntario
$529
Find similar
United Airlines
Nov 5
ONT7:00 amOntario
17h 10m
1 stop
DUB8:10 amDublin
Nov 12
DUB9:00 amDublin
45h 31m
2 stops
ONT10:31 pmOntario
$549
Find similar
United Airlines
Oct 29
ONT7:00 amOntario
18h 10m
1 stop
DUB8:10 amDublin
Nov 6
DUB12:05 pmDublin
18h 46m
2 stops
ONT10:51 pmOntario
$552
Find similar

British Airways flights from Ontario to Ireland

Our best British Airways deals on Ontario to Ireland flight tickets
British Airways
Nov 12
ONT4:47 pmOntario
15h 48m
2 stops
DUB4:35 pmDublin
Nov 19
DUB12:05 pmDublin
18h 24m
2 stops
ONT10:29 pmOntario
$766
Find similar
British Airways
Oct 30
ONT10:57 amOntario
16h 18m
2 stops
DUB10:15 amDublin
Nov 10
DUB12:05 pmDublin
18h 24m
2 stops
ONT10:29 pmOntario
$861
Find similar
British Airways
Nov 7
ONT4:47 pmOntario
18h 38m
2 stops
ORK7:25 pmCork
Nov 11
ORK5:35 pmCork
32h 46m
2 stops
ONT6:21 pmOntario
$892
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 October 23, 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 11/5

5:05 am-10:20 am

2 stops21h 15m

Dublin

Wed 11/12

9:00 am-10:31 pm

2 stops45h 31m

$529

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 11/5

7:00 am-8:10 am

1 stop17h 10m

Dublin

Wed 11/12

9:00 am-10:31 pm

2 stops45h 31m

$549

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 11/12

7:05 am-7:45 am

1 stop16h 40m

Dublin

Wed 11/19

9:45 am-7:42 pm

1 stop17h 57m

$553

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 12/28

11:10 am-7:45 am

1 stop12h 35m

Dublin

Tue 1/13

10:45 am-9:14 pm

2 stops18h 29m

$557

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 12/27

11:59 pm-8:10 am

1 stop24h 11m

Dublin

Tue 1/13

10:40 am-8:58 pm

2 stops18h 18m

$563

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 11/5

7:00 am-8:10 am

1 stop17h 10m

Dublin

Tue 11/11

12:05 pm-10:51 pm

2 stops18h 46m

$577

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 12/6

10:47 am-7:10 am

1 stop12h 23m

Dublin

Sat 12/13

12:55 pm-10:28 pm

1 stop17h 33m

$678

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 4/8

12:55 pm-9:45 am

1 stop12h 50m

Dublin

Sun 4/19

1:45 pm-9:56 pm

1 stop16h 11m

$690

OntarioCork

ONT - ORK

ONTORK

Ontario

Wed 4/1

1:00 pm-10:35 pm

2 stops25h 35m

Cork

Sun 4/5

6:00 am-5:15 pm

2 stops19h 15m

$697

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 3/27

3:09 pm-3:45 pm

2 stops17h 36m

Shannon

Tue 3/31

7:40 am-11:43 pm

2 stops24h 03m

$773

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 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

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
DeltaPriceFrom $527Free CancellationRating
7.9
7,982 reviews
Search Delta flights
IberiaPriceFrom $547Free CancellationRating
7.0
2,997 reviews
Search Iberia flights
American AirlinesPriceFrom $677Free CancellationRating
7.2
11,033 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 11/22
Sat 11/29
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Ireland

Popular cities in Ireland

Popular flights according to clicks in the last 7 days on momondo
Flights to Dublinfrom $278
Flights to Shannon, Clarefrom $349
Flights to Corkfrom $377
Flights to Knockfrom $583
Flights to Milltown (Kerry)from $415
Flights to Donegalfrom $436