ONT - DUB

$427 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 7/17. 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
$720
Air Canada
Wed 8/5Wed 8/19
ONT - DUB • 2 stops
Cheapest one-way
$427
Multiple Airlines
Fri 7/17
ONT - DUB • 3 stops
Top airlines
Air Canada
Cheapest • from $720 (round-trip)
American Airlines
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
Atlanta (ATL)
Cheapest • Avg $1,094 (round-trip)
Atlanta (ATL)
Shortest trip • 12h 58m (one-way)
Insights
Insights
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Insights
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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!
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, Aug 5 - Wed, Aug 19
Air Canada Logo
1:50 pm - 7:45 am
ONT
-
DUB
33h 55m
2 stops
Air Canada Logo
9:50 am - 12:12 pm
DUB
-
ONT
34h 22m
2 stops
$720Air Canada
Wed, Aug 12 - Fri, Aug 28
Air Canada Logo
8:00 am - 7:45 am
ONT
-
DUB
39h 45m
2 stops
Air Canada Logo
9:50 am - 12:12 pm
DUB
-
ONT
34h 22m
2 stops
$721Air Canada
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 - 6:19 pm
DUB
-
ONT
40h 29m
2 stops
$724United Airlines
Fri, Aug 14 - Mon, Aug 31
Air Canada Logo
5:00 am - 7:45 am
ONT
-
DUB
18h 45m
2 stops
Air Canada Logo
9:50 am - 8:52 pm
DUB
-
ONT
43h 02m
2 stops
$727Air Canada
Tue, Aug 18 - Tue, Sep 1
United Airlines Logo
5:45 am - 7:30 am
ONT
-
DUB
17h 45m
2 stops
United Airlines Logo
9:50 am - 6:19 pm
DUB
-
ONT
40h 29m
2 stops
$728United Airlines
Sat, Aug 15 - Sun, Aug 30
Air Canada Logo
1:18 pm - 8:15 am
ONT
-
DUB
34h 57m
2 stops
Air Canada Logo
9:50 am - 12:12 pm
DUB
-
ONT
34h 22m
2 stops
$729Air Canada
Sat, Aug 15 - Tue, Sep 1
Air Canada Logo
5:00 am - 8:15 am
ONT
-
DUB
43h 15m
2 stops
Air Canada Logo
9:50 am - 8:52 pm
DUB
-
ONT
43h 02m
2 stops
$732Air Canada
Wed, Aug 5 - Fri, Aug 14
Air Canada Logo
1:50 pm - 7:45 am
ONT
-
DUB
33h 55m
2 stops
Air Canada Logo
9:50 am - 6:11 pm
DUB
-
ONT
40h 21m
2 stops
$737Air Canada
Fri, May 1 - Fri, May 15
Air Canada Logo
6:00 am - 7:45 am
ONT
-
DUB
41h 45m
2 stops
Air Canada Logo
9:50 am - 10:59 pm
DUB
-
ONT
45h 09m
2 stops
$738Air Canada
Tue, Aug 18 - Tue, Sep 1
Multiple Airlines Logo
8:00 am - 8:15 am
ONT
-
DUB
16h 15m
2 stops
Multiple Airlines Logo
9:50 am - 8:52 pm
DUB
-
ONT
43h 02m
3 stops
$740Multiple Airlines
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 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Dublin were found on Air Canada ($720) and United Airlines ($724).

Find deals

Good to know

Cheapest flight$427
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 $427 for a one-way ticket and $720 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 11466 reviews
7.5Boarding
6.9Entertainment
6.4Food
7.2Comfort
7.9Crew
Airline reviews

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

4.0 OkaySean, Mar 2026
PSP - DFW
Read more American Airlines reviews

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

My seat was assigned last row behind restrooms No legroom’s I’m very Pettit Still was not comfortable Food choice was excellent

The worst Airline ever. They centered my second flight and leave me in NY. They don’t have any representatives at the airport and they don’t respond to calls. Basically I got stuck. I will never purchase through there again.

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

Mediocre would be best description. Food bland. Seat biz class uncomfortable to sleep. Crew never dimmed lights completely in an overnight flight to Europe. Would avoid AA if possible.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

Experience was great. The best part is the free Wi-Fi connection which helps me to work on the flight

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

Information on your arrival and departure airports

Ontario (ONT)
Dublin (DUB)