ONT - DUB

$362 Find Cheap Flights from Ontario to Dublin - 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 Dublin 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

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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$823
Air France, KLM
Wed 10/14Wed 10/21
ONT - DUB • 1 stop
Cheapest one-way
$362
Air France
Wed 9/23
ONT - DUB • 1 stop
Top airlines
Cheapest • from $848 (round-trip)
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Dublin. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $908 (round-trip)
Shortest trip • 12h 55m (one-way)
Insights
Insights
Insights
Insights
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We hope you love your trip to Dublin!
Flight Deals
Booking Insights
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

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
Tue, Aug 18 - Tue, Sep 1
United Airlines Logo
7:00 am - 9:45 am
ONT
-
DUB
18h 45m
1 stop
United Airlines Logo
9:50 am - 10:35 pm
DUB
-
ONT
44h 45m
2 stops
$848United Airlines
Tue, Aug 18 - Tue, Sep 1
United Airlines Logo
9:15 am - 11:10 am
ONT
-
DUB
17h 55m
2 stops
United Airlines Logo
9:50 am - 10:35 pm
DUB
-
ONT
44h 45m
2 stops
$852United Airlines
Wed, Sep 2 - Wed, Sep 9
United Airlines Logo
5:00 am - 7:45 am
ONT
-
DUB
18h 45m
2 stops
United Airlines Logo
9:20 am - 9:59 pm
DUB
-
ONT
44h 39m
2 stops
$856United 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
Mon, Nov 16 - Wed, Nov 25
KLM Logo
7:00 am - 7:45 am
ONT
-
DUB
16h 45m
1 stop
KLM Logo
9:45 am - 10:14 pm
DUB
-
ONT
20h 29m
1 stop
$875KLM
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.

Which airlines provide the cheapest flights from Ontario to Dublin?

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 Dublin were found on United Airlines ($848) and Air Canada ($865).

Good to know

Cheapest flight$362
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 5 days, the lowest price for a flight from Ontario to Dublin was $362 for a one-way ticket and $823 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?

    oneworld is the only airline alliance operating flights between Ontario and Dublin.

  • 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 airline flying 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.
7.1
American AirlinesOverall score based on 11660 reviews
7.9Crew
7.5Boarding
7.2Comfort
6.4Food
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 Dublin

Information on your arrival and departure airports