$425 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 6/11. 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$898
Shannon
Shannon1 stop$841
Dublin
Dublin1 stop$898
Shannon
Shannon1 stop$841

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, Aug 17 - Wed, Sep 2
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 6:19 pm
SNN
-
ONT
16h 49m
1 stop
$841United Airlines
Sun, May 31 - Tue, Jun 16
United Airlines Logo
6:30 am - 7:30 am
ONT
-
SNN
17h 00m
1 stop
United Airlines Logo
12:30 pm - 10:37 pm
SNN
-
ONT
18h 07m
2 stops
$890United Airlines
Sun, Aug 16 - Sat, Aug 29
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 6:19 pm
SNN
-
ONT
16h 49m
1 stop
$891United Airlines
Sat, Aug 8 - Sat, Aug 22
JetBlue Logo
11:24 pm - 9:00 am
ONT
-
DUB
25h 36m
1 stop
JetBlue Logo
11:30 am - 10:05 pm
DUB
-
ONT
18h 35m
1 stop
$898JetBlue
Mon, Aug 17 - Sat, Aug 22
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 6:19 pm
SNN
-
ONT
16h 49m
1 stop
$900United Airlines
Fri, Oct 23 - Fri, Nov 6
Multiple Airlines Logo
12:00 pm - 8:45 am
ONT
-
DUB
12h 45m
1 stop
Multiple Airlines Logo
9:45 am - 6:18 pm
DUB
-
ONT
16h 33m
1 stop
$908Multiple Airlines
Tue, Aug 18 - Tue, Sep 1
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
$913JetBlue
Sun, Aug 16 - Wed, Aug 26
Air Canada Logo
1:44 pm - 7:45 am
ONT
-
DUB
58h 01m
2 stops
Air Canada Logo
9:50 am - 6:11 pm
DUB
-
ONT
40h 21m
2 stops
$931Air Canada
Fri, Aug 21 - Tue, Sep 8
Air Canada Logo
1:18 pm - 8:15 am
ONT
-
DUB
58h 57m
2 stops
Air Canada Logo
9:20 am - 12:38 pm
DUB
-
ONT
35h 18m
2 stops
$943Air Canada
Tue, Sep 8 - Tue, Sep 22
Delta Logo
6:00 am - 2:40 pm
ONT
-
ORK
24h 40m
2 stops
Delta Logo
6:15 am - 11:44 pm
ORK
-
ONT
25h 29m
2 stops
$993Delta
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 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Ireland were found on United Airlines ($891) and JetBlue ($898).

Find deals

Good to know

Cheapest flight$425
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 11678 reviews
7.9Crew
6.4Food
7.5Boarding
7.2Comfort
6.9Entertainment
Airline reviews

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

10.0 ExcellentStan, Apr 2026
LAX - PHL
Read more American Airlines reviews

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

Boarding gate at LAX was too crowded—two gates next to one another

On time departure and early arrival. Flight attendant very nice.

The business class layout of chairs was weired. You are sitting directly across stranger.,

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

Friendly crew is the only nice thing. Seats uncomfortable. Food and snacks horrible. Movies were the same as the first 10 hour flight two weeks before

Was not able to do a online check-in because the American Airlines system doesn't store our visa or other passport information, allowing us to have a trouble-free check-in. We were forced to have to check-in at the counter which Changes are upgrade status given that we were not able to check in much earlier.

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

We left at 1030 am pacific from LA and supposed to land at 7 pm Eastern in NY. They made a detour, stopped in Philadelphia and didn’t land till 1130 PM Eastern!!! Worst flight experience with no pilot communication with no explanation as to what was going on. Everyone was very frustrated to say the least.

I cancelled my ticket less than 24 hours deadline but I didn’t get refunded.

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

Information on your arrival and departure airports

Ontario (ONT)