$362 Find Cheap Flights from Ontario to Ireland - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Ireland departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Ontario to Ireland

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Dublin
Dublin1 stop$823
Shannon
Shannon1 stop$777
Dublin
Dublin1 stop$823
Shannon
Shannon1 stop$777

Book Cheap Ontario to Ireland Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Ireland that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Ireland

Mon, Aug 3 - Wed, Aug 19
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
Fri, Sep 11 - Tue, Sep 15
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
Sun, Aug 9 - Tue, Aug 25
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
$785United Airlines
Sun, Aug 9 - Tue, Aug 25
United Airlines Logo
5:45 am - 7:30 am
ONT
-
SNN
17h 45m
2 stops
United Airlines Logo
9:30 am - 8:01 pm
SNN
-
ONT
18h 31m
2 stops
$790United Airlines
Wed, Oct 14 - Wed, Oct 21
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, Aug 5 - Sun, Aug 30
Multiple Airlines Logo
8:58 am - 11:45 am
ONT
-
DUB
18h 47m
1 stop
Multiple Airlines Logo
10:40 am - 7:48 pm
DUB
-
ONT
41h 08m
2 stops
$838Multiple Airlines
Mon, Aug 3 - Wed, Aug 19
Air Canada Logo
5:00 am - 7:45 am
ONT
-
DUB
18h 45m
2 stops
Air Canada Logo
9:50 am - 8:53 pm
DUB
-
ONT
19h 03m
2 stops
$865Air Canada
Sun, Aug 23 - Tue, Sep 8
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
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
$871American Airlines
Mon, Aug 3 - Wed, Aug 19
American Airlines Logo
2:15 pm - 9:45 am
ONT
-
DUB
35h 30m
1 stop
American Airlines Logo
12:40 pm - 10:59 pm
DUB
-
ONT
18h 19m
1 stop
$873American Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Ireland flights

Get data-powered insights and trends into flights from Ontario to Ireland to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Ontario to Ireland?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Ontario to Ireland were found on United Airlines ($777) and Air Canada ($865).

Good to know

Cheapest flight$362
Flight from Ontario to Dublin

FAQs - booking Ireland flights

  • How does KAYAK find such low prices on flights from Ontario to Ireland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Ireland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Ireland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Ireland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Ireland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to Ireland with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Ireland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario to Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Ireland

 
Need help choosing which airline to fly with from Ontario to Ireland? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11660 reviews
7.2Comfort
7.9Crew
6.4Food
7.5Boarding
6.8Entertainment
Airline reviews

Agency very bad had to cancelled my booking too many changes in the flight changed my flight to 1 week

2.0 MediocreUzair, Jun 2026
SFO - JFK
Read more American Airlines reviews

Agency very bad had to cancelled my booking too many changes in the flight changed my flight to 1 week

Luggage did not make it onto my plane. Business seats were economy with empty row seat. Just horrible experience. Why would the company allow for transfers that don’t give employees enough time to transfer luggages??

The gate experience at LAX was abysmal (same for the arrival experience two days prior). Despite the LAX -> SAT schedule of two flights daily, our departure gate was at a smaller hub that we had to be bussed to from Terminal 4. Fortunately, I arrived at LAX extra early and had time to spare, but if I had not known, I might have missed my flight. I looked at the LAX airport map in the AA app and there was no indication of the additional boarding process. Lastly the gate area we were bussed to was crowded with limited food and beverage options. On flight, the fight attendant was hospitable and attentive, the flight was smooth, and AA's free (and working) wifi for AA members were all on the positive side.

Our flight from JFK to Madrid was delayed. We had to go from one side of the Madrid airport (Terminal 4s to the far end of terminal 4 - Gate K98) to our gate in less than 30 minutes. Put passport control and security/baggage check and that’s very hard unless you’re Usain Bolt. I called Iberia Airlines and the telephone customer service told me that I was going to have to pay to re-book. Luckily the help desk in the airport (who was dealing with dozens of people from the same JFK-Madrid flight) did not charge us extra to reschedule to a flight 8 hours later. They also gave us a voucher for breakfast and lunch. Glad the actual person at the airport had some actual sense.

For an long range economy flight I feel more space and more meal options need to be offered for flights over 5 hours

Take-off delayed an hour because of a missing flight officer, so,arrived in Charlotte lates causing many passengers to miss connections. Otherwise a very good flight, safe and comfortable, with an excellent professional crew.

The flight from LA to Chicago was smooth and service was very good overall.

B-class on an old plane with antiquated amenities and poor service. Landed in Rome w/o bag that didn’t make the connection (plenty of time in London). Bag will come to hotel NOT the day it lands but the following night!! Still waiting for bag…BA had nothing to offer in support and couldn’t even tell me their comp, told to submit receipts and then I’ll learn what is or isn’t covered.

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

It's a long flight and that is always difficult. I was comfortable and well. The movies available were great and the crew was good.

Everything you need to know for your flight from Ontario to Ireland

Information on your arrival and departure airports