ONT - DUB

$361 Find Cheap Flights from Ontario to Dublin

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 Dublin departing on 3/1. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Dublin

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Dublin, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Dublin, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Ontario to Dublin (ONT-DUB)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Dublin 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 Dublin

Mon, Oct 20 - Wed, Nov 5
Delta Logo
11:36 am - 8:45 amONT-DUB
13h 09m1 stop
Delta Logo
9:45 am - 7:19 pmDUB-ONT
17h 34m1 stop
$475Delta
Find Deal
Tue, Nov 25 - Fri, Dec 5
Air Canada Logo
5:05 am - 7:10 amONT-DUB
18h 05m2 stops
Air Canada Logo
9:00 am - 8:42 pmDUB-ONT
19h 42m2 stops
$476Air Canada
Find Deal
Mon, Nov 10 - Fri, Nov 21
United Airlines Logo
7:00 am - 8:10 amONT-DUB
17h 10m1 stop
United Airlines Logo
9:00 am - 10:31 pmDUB-ONT
21h 31m2 stops
$478United Airlines
Find Deal
Sun, Nov 9 - Wed, Nov 19
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
$483United Airlines
Find Deal
Mon, Oct 27 - Mon, Nov 3
American Airlines Logo
12:48 pm - 12:35 pmONT-DUB
16h 47m2 stops
American Airlines Logo
12:55 pm - 11:36 amDUB-ONT
30h 41m1 stop
$524American Airlines
Find Deal
Tue, Nov 11 - Mon, Nov 17
Multiple Airlines Logo
7:00 am - 7:10 amONT-DUB
16h 10m2 stops
Multiple Airlines Logo
9:00 am - 6:36 pmDUB-ONT
17h 36m2 stops
$535Multiple Airlines
Find Deal
Thu, Dec 4 - Thu, Dec 11
Multiple Airlines Logo
6:35 am - 7:10 amONT-DUB
16h 35m1 stop
Multiple Airlines Logo
1:10 pm - 11:55 pmDUB-ONT
18h 45m2 stops
$550Multiple Airlines
Find Deal
Sat, Nov 22 - Mon, Dec 8
Iberia Logo
12:49 pm - 7:10 amONT-DUB
34h 21m1 stop
Iberia Logo
12:55 pm - 10:28 pmDUB-ONT
17h 33m1 stop
$557Iberia
Find Deal
Mon, Oct 27 - Mon, Nov 3
American Airlines Logo
12:48 pm - 12:35 pmONT-DUB
16h 47m2 stops
American Airlines Logo
10:45 am - 9:59 pmDUB-ONT
19h 14m2 stops
$579American Airlines
Find Deal
Mon, Oct 20 - Sun, Nov 2
Iberia Logo
12:48 pm - 9:45 amONT-DUB
12h 57m1 stop
Iberia Logo
12:55 pm - 11:57 pmDUB-ONT
19h 02m1 stop
$613Iberia
Find Deal

Everything you should know

Top airlines
Delta
Cheapest • from $475 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
December
Cheapest • 29% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$475
Typical prices: $623-870
Delta
Mon 10/20Wed 11/5
ONT - DUB • 1 stop
Cheapest one-way
$361
Multiple Airlines
Sun 3/1
ONT - DUB • 3 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Dublin!
Booking Insights

KAYAK's insights & trends for Ontario to Dublin flights

Get data-powered insights and trends into flights from Ontario to Dublin 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 Dublin?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Dublin, 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 Dublin is December, where tickets cost $573 (return) on average. On the other hand, the most expensive months are April and September, where the average cost of round-trip tickets is $986 and $976 respectively.

Good to know

Low seasonDecember
Cheapest flight$361
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from Ontario to Dublin

When to book flights from Ontario to Dublin

Are your dates flexible? Find out the best times to travel from Ontario to Dublin based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Dublin

  • What is the cheapest flight from Ontario to Dublin?

    In the last 3 days, the lowest price for a flight from Ontario to Dublin was $361 for a one-way ticket and $475 for a round-trip.

  • Do I need a passport to fly between Ontario and Dublin?

    Yes

  • Which aircraft models fly most regularly from Ontario to Dublin?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Dublin?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Ontario and Dublin, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Dublin, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Dublin are Delta and American Airlines. With an average price for the route of $846 and an overall rating of 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $975 and an overall rating of 7.2.

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

    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 Dublin.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Dublin from Ontario 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 Dublin?

    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 to Dublin with an airline and back to Ontario with another airline. Booking your flights between Ontario and DUB can sometimes prove cheaper using this method.

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

    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 to Dublin from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Ontario to Dublin

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Dublin. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Dublin? 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 7957 reviews
7.9Comfort
7.9Entertainment
7.3Food
8.2Boarding
8.5Crew
Airline reviews

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.

2.0 MediocreAnonymous, Sep 2025SNA - SEA
Read more Delta reviews

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.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

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.

Was not able to watch most shows on the entertainment site. They would not load

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Delayed flight, so I switched fights to SFO to Phoenix , Phoenix to DSM. Excellent service through American Airlines

AA re-routed flight from HNL to LAX due to delay. My group of 3 with reserved seats in row 9 was broken up, with one assigned to a middle seat, another in the last row of the plane. Not happy. No explanation to the delay. No apologies. No compensation. Would have been nice to be offered an Admiral Club admission or a voucher for the extra 3 hours of layover in LAX. Could not hear the boarding gate announcements in LAX. Adjacent gate was boarding at the same time. Loud speakers were competing against each other. Barely made my boarding group.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

Bad food, small seats that didn’t recline. I thought I was buying a quantas ticket so I feel like I got scammed

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

Iberia lost my bag, said they found it in another country, said they sent it to me, but never did. Went my whole trip without my stuff, but expecting it to show up because that’s what they said would happen. Their communication sucks, their website sucks, and to top it all off, their seats are small and uncomfortable. They’re bad at their jobs and they should feel bad about themselves. Do not even get me started on the flight home. AVOID!

I described my experience in the previous window. I didn't realize that there would be another opportunity for this flight. Please look at my response in the previous window.

Boarding was 2 1/2 late no explanation Captain said he did not know why, but he rested at home for an extra couple of hours. Food was edible, Nothing more.

I liked the comfort of the plane. It was unexpected from past experiences.

BEWARE!!! Iberia changes your seats at random. I paid for a window seat and they changed it to one in the middle aisle resting against the bathroom- can’t lean back + hear every flush. This on a 11 hour flight.. There were families that were broken up with separate seats all over the plane. Lots of upset passengers showing their seat confirmation to the besieged and helpless airline steward. Also, the gluten free meal was tasteless.

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

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