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Ontario

$442+ Cheap flights from Ireland to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Aug 22 — Aug 291
Fri 8/22
Fri 8/29
1 adult, Economy
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Cheap flight deals from Ireland to Ontario

Keep the following information in mind while searching for Ireland to Ontario flight deals. Data was last updated August 17, 2025.

Round-trip from

$584
(TravelUp)

One-way from

$442
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$829
From Ireland to Ontario
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One-way flight from Ireland to Ontario
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Highest demand for flights based on searches. 16% potential increase in price ($133 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Ireland to Ontario

Cheapest flights from Ireland to Ontario
Explore the most affordable flight options available from Ireland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2025.

This TravelUp deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/312:40 pmDUB - ONT
1 stop14h 14mMultiple Airlines
Sun 9/1412:45 pmONT - DUB
1 stop13h 00mMultiple Airlines
Deal found 8/16$584
This Iberia deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/412:40 pmDUB - ONT
1 stop14h 14mIberia
Wed 9/1710:54 amONT - DUB
1 stop14h 51mIberia
Deal found 8/15$595
This American Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/412:40 pmDUB - ONT
1 stop14h 14mAmerican Airlines
Wed 9/1712:47 pmONT - DUB
1 stop12h 58mAmerican Airlines
Deal found 8/16$596
This Iberia deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/412:40 pmDUB - ONT
1 stop14h 14mIberia
Fri 9/1912:45 pmONT - DUB
1 stop13h 00mIberia
Deal found 8/17$597
This lastminute.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/312:40 pmDUB - ONT
1 stop14h 14mIberia
Tue 10/1412:47 pmONT - DUB
1 stop12h 58mIberia
Deal found 8/16$619
This Iberia deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/312:40 pmDUB - ONT
1 stop14h 14mIberia
Thu 9/1110:55 amONT - DUB
1 stop14h 50mIberia
Deal found 8/16$631
This American Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3112:40 pmDUB - ONT
1 stop13h 45mAmerican Airlines
Sun 9/1412:45 pmONT - DUB
1 stop13h 00mAmerican Airlines
Deal found 8/16$685
This KLM deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2911:00 amDUB - ONT
1 stop16h 11mMultiple Airlines
Sun 8/3111:45 amONT - DUB
1 stop13h 00mMultiple Airlines
Deal found 8/15$761
This Delta deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/111:00 amDUB - ONT
1 stop16h 11mDelta
Fri 9/1211:55 amONT - DUB
1 stop12h 50mDelta
Deal found 8/16$774
This Justfly.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/39:50 amDUB - ONT
2 stops35h 01mAir Canada
Tue 10/146:36 pmONT - DUB
2 stops53h 09mAir Canada
Deal found 8/16$778
This Netflights deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/47:20 amORK - ONT
2 stops18h 56mBritish Airways
Sun 10/124:49 pmONT - ORK
2 stops19h 01mBritish Airways
Deal found 8/16$779
This TravelUp deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/411:30 amDUB - ONT
1 stop17h 59mJetBlue
Sun 10/1210:56 pmONT - DUB
1 stop25h 24mJetBlue
Deal found 8/16$786

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ireland to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 17, 2025.
Use the filters below to find and compare flights from Ireland to Ontario that are best for you.

Fly from

Ireland

Fly to

Ontario

Route

Depart

Return

Price

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 9/3

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

Sun 9/14

12:45 pm-9:45 am

1 stop13h 00m

$584

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 9/4

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

Wed 9/17

10:54 am-9:45 am

1 stop14h 51m

$595

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 9/4

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

Wed 9/17

12:47 pm-9:45 am

1 stop12h 58m

$595

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 10/2

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

Wed 10/15

12:47 pm-9:45 am

1 stop12h 58m

$595

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 9/5

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

Sun 9/21

12:45 pm-9:45 am

1 stop13h 00m

$595

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 10/6

12:40 pm-7:02 pm

1 stop14h 22m

Ontario

Wed 10/22

12:47 pm-9:45 am

1 stop12h 58m

$595

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 9/26

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

Mon 10/6

12:48 pm-9:45 am

1 stop12h 57m

$595

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 9/4

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

Thu 9/18

12:45 pm-9:45 am

1 stop13h 00m

$595

CorkOntario

ORK - ONT

ORKONT

Cork

Sat 10/4

7:20 am-6:16 pm

2 stops18h 56m

Ontario

Sun 10/12

4:49 pm-7:50 pm

2 stops19h 01m

$779

CorkOntario

ORK - ONT

ORKONT

Cork

Fri 10/3

7:20 am-6:16 pm

2 stops18h 56m

Ontario

Tue 10/14

4:49 pm-7:50 pm

2 stops19h 01m

$997

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Showing 1-10 of 24 results
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Best time to book a flight from Ireland to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Ireland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Ireland to Ontario?

Currently, August is the cheapest month in which you can book a flight from Ireland to Ontario (average of $246). Flying from Ireland to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Ireland to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Ireland?

    If you book a flight to Ontario from Ireland, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • Can I find deals for flights from Ireland to Ontario that include hotel bookings?

    Yes. In addition to deals on Ireland to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ireland to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Ontario.

  • Can I find deals for business class flights from Ireland to Ontario?

    Yes. Cheapflights offers flight deals from Ireland to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Ireland to Ontario (average of $246). Flying from Ireland to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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See prices for flight routes from nearby airports that may be better suited for you.
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