$353 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 9/25. 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$365
Shannon
Shannon1 stop$826
Dublin
Dublin1 stop$365
Shannon
Shannon1 stop$826

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

Wed, Sep 23 - Wed, Oct 7
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
Tue, Sep 1 - Fri, Sep 4
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
$718JetBlue
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 - 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 - 8:57 pm
DUB
-
ONT
17h 27m
1 stop
$733JetBlue
Mon, Aug 17 - Wed, Sep 2
JetBlue Logo
11:59 pm - 9:00 am
ONT
-
DUB
25h 01m
1 stop
JetBlue Logo
11:30 am - 10:37 pm
DUB
-
ONT
19h 07m
1 stop
$733JetBlue
Tue, Sep 1 - Fri, Sep 4
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
$738JetBlue
Sun, Sep 13 - Sat, Sep 19
JetBlue Logo
10:39 pm - 9:00 am
ONT
-
DUB
26h 21m
1 stop
JetBlue Logo
11:30 am - 8:57 pm
DUB
-
ONT
17h 27m
1 stop
$745JetBlue
Sat, Sep 5 - Sat, Sep 12
JetBlue Logo
11:13 pm - 9:00 am
ONT
-
DUB
25h 47m
1 stop
JetBlue Logo
11:30 am - 8:57 pm
DUB
-
ONT
17h 27m
1 stop
$745JetBlue
Mon, Aug 17 - Wed, Sep 2
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
$953American 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
$956American 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 Iberia ($365) and JetBlue ($718).

Good to know

Cheapest flight

$353
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 11845 reviews
7.9Crew
6.8Entertainment
6.4Food
7.2Comfort
7.5Boarding
Airline reviews

Flight attendant made the flight very enjoyable. He was courteous and gave great care to the passengers

10.0 ExcellentOmolayo, Aug 2026
SFO - DFW
Read more American Airlines reviews

Flight attendant made the flight very enjoyable. He was courteous and gave great care to the passengers

My seat had a worn out cushion, which made it a bit uncomfortable. Other than that, the flight was excellent.

American was the airline that Starlux contracted for this trip. I arrived in time to make the connecting flight on American, and then the baggage-handler debacle happened. For some reason, the first class and premium economy passengers' luggage was unloaded first. Never seen this happen before. They had handlers removing the bags from the carousel for those passengers. Meanwhile, all of the economy passengers were waiting for their bags, including me. And there were a lot of bags because it was an international flight packed full. While waiting for 45 minutes, my bag didn't show. Meanwhile, an American representative showed up asking if anyone has a connecting flight to Phoenix. Of course I spoke up, and they proceeded to try to find my bag because I had to take a bus to the actual terminal to catch my flight. Which I was not informed of before I arrived. After another 15 minutes of searching, my bag was finally found with the first-class passengers' bags because they had pulled it by mistake. So I rushed to the terminal with the American representative to catch my flight, and they informed me that I missed it and could not get another flight until the next day. Of course, after being on an international flight for 18 hours, I was in no mood to hear this. Now, to be fair, there were a few American employees who tried to help me. After hearing about the missed flight, they got a supervisor to talk to. I expressed my situation to the supervisor, and she was not helpful until I asked for compensation. She agreed to get me a hotel room for the night. So I agreed, and she disappeared into her office, and I waited. And waited. And waited. And waited. While waiting, I was asked by three different employees who knew of my situation if I had been helped. I told them I was waiting for the supervisor to get the hotel room, and they said they would check. Finally, after waiting for 75 minutes, one of the employees who had asked me if I had been helped arrived with my hotel room and arranged a ride to the hotel for me. Never saw the supervisor again. It was now 8 o'clock; I arrived at 5:45! My rebooked fight was scheduled for 6:11 this morning and I have now been informed it has been delayed until 10:00. So am I happy with American? NO I'M NOT!! ;

Not good. Flight crew, was not friendly and just shoved stuff at us. Not the way I like to travel.

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.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

The flight was on time and arrived early. The crew were friendly and helpful.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

VERY disappointed at the agent checking in my luggage. I know that the weight limit is 23 kg, a little over 50 pounds (50.71 pounds). Yet the agent kept repeating "50 pounds". So I said, the limit is 23 kg, and she had the audacity to say 'no, it is 22 kg!" Imagine my surprise. Was she ignorant or was she poorly trained? Not sure. The boarding process was pretty good. The speakers were loud enough so I still could hear them despite inconsiderate passengers continuing to speak while the announcements were going on. During the flight, the teenage girl sitting behind me kept pressing her feet to the back of my chair. I turned around several times, yet she did not get the hint. I did not make a fuss since I sense I had a bad streak that night with AA, so I just did the best I can to lean forward and not let that bother me.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

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

Information on your arrival and departure airports