$465 Find Cheap Flights from Ontario to Ireland

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 1/25. 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
Dublin2 stops$557
Shannon
Shannon2 stops$773
Dublin
Dublin2 stops$557
Shannon
Shannon2 stops$773

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, Dec 29 - Fri, Jan 9
United Airlines Logo
6:39 pm - 8:10 amONT-DUB
29h 31m2 stops
United Airlines Logo
10:40 am - 9:58 pmDUB-ONT
19h 18m2 stops
$557United Airlines
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Mon, Jan 12 - Mon, Jan 19
Multiple Airlines Logo
10:58 am - 3:20 pmONT-DUB
20h 22m2 stops
Multiple Airlines Logo
9:40 am - 10:08 amDUB-ONT
32h 28m2 stops
$575Multiple Airlines
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Fri, Nov 28 - Fri, Dec 5
Iberia Logo
7:00 am - 7:10 amONT-DUB
16h 10m1 stop
Iberia Logo
12:55 pm - 10:28 pmDUB-ONT
17h 33m1 stop
$602Iberia
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Fri, Nov 28 - Fri, Dec 5
Iberia Logo
7:00 am - 7:10 amONT-DUB
16h 10m1 stop
Iberia Logo
12:55 pm - 10:28 pmDUB-ONT
17h 33m1 stop
$603Iberia
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Fri, Nov 14 - Sat, Nov 22
Air Canada Logo
6:38 pm - 7:10 amONT-DUB
28h 32m2 stops
Air Canada Logo
9:00 am - 5:34 pmDUB-ONT
40h 34m2 stops
$621Air Canada
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Fri, Jan 2 - Sat, Jan 10
Delta Logo
10:29 pm - 7:45 amONT-DUB
25h 16m2 stops
Delta Logo
10:45 am - 11:54 amDUB-ONT
33h 09m2 stops
$723Delta
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Sun, Dec 14 - Fri, Jan 9
Delta Logo
7:05 am - 7:45 amONT-DUB
16h 40m1 stop
Delta Logo
10:45 am - 9:07 pmDUB-ONT
18h 22m2 stops
$737Delta
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Fri, Mar 27 - Tue, Mar 31
American Airlines Logo
10:57 am - 3:45 pmONT-SNN
21h 48m2 stops
American Airlines Logo
7:40 am - 10:02 pmSNN-ONT
22h 22m2 stops
$773American Airlines
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Thu, Dec 25 - Wed, Jan 7
Air Canada Logo
5:05 am - 7:10 amONT-DUB
18h 05m2 stops
Air Canada Logo
9:00 am - 10:53 pmDUB-ONT
21h 53m2 stops
$784Air Canada
Find Deal
Fri, Mar 27 - Tue, Mar 31
American Airlines Logo
3:09 pm - 3:25 pmONT-ORK
17h 16m2 stops
American Airlines Logo
7:20 am - 11:43 pmORK-ONT
24h 23m2 stops
$888American Airlines
Find Deal
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.

What is the cheapest month to fly from Ontario to Ireland?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Ireland, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Ireland is December, when tickets cost $573 (return) on average. On the other hand, the most expensive months are April and September, when the average cost of round-trip tickets is $986 and $976 respectively.

Good to know

Low seasonDecember
Cheapest flight$468
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 10% increase in price.
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.

  • What is the cheapest time of day to fly to Ireland?

    The cheapest time of day to fly to Ireland is generally in the afternoon, when round-trip flights cost $818 on average. The most expensive time of day to fly to Ireland is generally in the morning, which is peak travel time and where the average cost of a ticket is $871.

Reviews of the top 3 airlines serving 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.
7.9
DeltaOverall score based on 7993 reviews
7.9Comfort
7.9Entertainment
7.3Food
8.2Boarding
8.5Crew
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

The flight was flawless and we even arrived between 20 and 25 minutes early!

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

The entertainment package was vast and the selections were very current. Keep updating it was great.

The seat was so hard my tailbone was aching The crew was kind of a b**** because I made a joke that I didn't care if they close the door I total c*** when she was trying to f****** act like she was mad at me because I said that The flight was bumpy. Sure you didnt have control over that.

4 hours late, including over +1 hour waiting in plane to take off. Baggage left behind too.

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

The seats are so small that you can barely move at all. Don't try to eat with utensils in your seat either - you will elbow your neighbor in the face. Miserably small and I swear they are shrinking every time I fly. Food was meh (per usual), but at least there is free alcohol on an overseas flight. Doesn't make up for sitting in a torture chamber while hurtling through the air with hundreds of fussy people, but it's something. Entertainment options (movies, shows) are okay, nothing special, but at least there are screens, because most of the seats in these large planes do not have adjustable lighting - or air control - that you can get to, it's too high to reach - which makes reading impossible. Zero stars, AA.

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

We departed late but made up most of the time in flight. Our ticket was pure economy, so it wasn’t anything fancy; however, I heard that we arrived in Madrid at the exact same time that First Class passengers arrived! Overall, our experience was similar to what we had on other American Airlines transatlantic flights - good value at a reasonable price. We were even able to get our carry-on baggage onto the plane without needing to gate check it.

The crew were friendly and helpful. Iberia lost our luggage on arrival, Friday and we didn't get it until Sunday at 10:00 p.m. local Malaga time. I also paid $382.80 for seat assignments but two out out of the four were not together. Iberia mentioned that it was because the plane was delayed in Madrid before our flight began in LAX. They should compensate us half of my payment.

It was fortunate that the flight arrived in London in accordance with schedule, and the luggage was promptly transferred to the luggage carousel. However, I find it concerning that even minor issues in economy cabins are prevalent within the industry. American Airlines, in particular, appears to have the least legroom and feels more crowded due to the proximity of neighboring passengers. Additionally, the crew’s adherence to protocol is inconsistent. While they may enforce certain rules set by the FAA on a select few individuals, they often overlook numerous violations, such as failing to reset seat recline during landing.

We liked the flight but while we purchased an aisle seat, our seats had a different configuration on this flight. A fellow passenger suggested that the airplane had been changed. Too bad we were not informed and had no chance to modify our seat preferences. We were stuck in the window and middle seats with no chance to walk around and go to the bathroom without disturbing our sleeping fellow passenger.

The crew were not very personable. The crew did not serve tea or coffee. The bathroom was not kept clean. Two out of the 5 toilets in the cabin weren't working.

It was extremely cold in the back of the plane. The seats are uncomfortable and space very small. Crew was excellent as usual.

Check in needed to be in person, not nice. Also I won’t do connections in Charlotte again because you need to go through security again and short connections become a problem

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