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Ontario

$567+ 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
ene. 3 — ene. 101
sáb. 1/3
sáb. 1/10
1 adult, Economy
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Cheap 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 diciembre 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/2310:40 amDUB - ONT
1 stop19h 45mUnited Airlines
sáb. 1/105:05 amONT - DUB
2 stops18h 25mUnited Airlines
Deal found 12/3$731
This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/2610:40 amDUB - ONT
1 stop19h 45mUnited Airlines
dom. 1/186:00 amONT - DUB
2 stops18h 10mUnited Airlines
Deal found 12/3$765
This United Airlines deal was found by Cheapflights users on 12/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/59:00 amDUB - ONT
2 stops21h 49mUnited Airlines
mar. 12/96:00 amONT - DUB
2 stops17h 30mUnited Airlines
Deal found 12/2$832
This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/2310:40 amDUB - ONT
1 stop19h 45mUnited Airlines
vie. 1/211:59 pmONT - DUB
1 stop24h 11mUnited Airlines
Deal found 12/3$866
This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1810:40 amDUB - ONT
1 stop19h 45mUnited Airlines
lun. 12/2211:59 pmONT - DUB
1 stop24h 11mUnited Airlines
Deal found 12/3$895
This American Airlines deal was found by Cheapflights users on 12/2. 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.
vie. 12/512:55 pmDUB - ONT
1 stop17h 33mAmerican Airlines
mar. 12/96:17 amONT - DUB
2 stops18h 23mAmerican Airlines
Deal found 12/2$954
This KLM deal was found by Cheapflights users on 12/4. 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.
vie. 12/59:45 amDUB - ONT
1 stop17h 54mKLM
vie. 12/127:05 amONT - DUB
1 stop16h 40mKLM
Deal found 12/4$959
This United Airlines deal was found by Cheapflights users on 12/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/2710:40 amDUB - ONT
1 stop19h 45mUnited Airlines
sáb. 2/286:00 amONT - DUB
2 stops17h 30mUnited Airlines
Deal found 12/4$963
This Kissandfly.com deal was found by Cheapflights users on 12/4. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/1212:55 pmDUB - ONT
1 stop28h 59mBritish Airways
mié. 12/2412:45 pmONT - DUB
1 stop34h 25mBritish Airways
Deal found 12/4$1,124
This American Airlines deal was found by Cheapflights users on 12/4. 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.
sáb. 12/201:10 pmDUB - ONT
2 stops18h 36mAmerican Airlines
mié. 12/2412:55 pmONT - DUB
2 stops34h 15mAmerican Airlines
Deal found 12/4$1,188

Find flight deals from Ireland to Ontario

Keep the following information in mind while searching for Ireland to Ontario flight deals. Data was last updated diciembre 4, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$583
(Finnair)

One-way from

$567
(JetBlue)

Popular in

July

Cheapest in

February

Average price

$719
Provider with most accurate pricing for Dublin-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Dublin-Los Angeles flights.
Search Deals
From Ireland to Ontario
Search Deals
One-way flight from Ireland to Ontario
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($134 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 diciembre 4, 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

sáb. 4/4

9:50 am-8:46 pm

2 stops18h 56m

Ontario

mar. 4/14

5:10 am-7:20 am

2 stops18h 10m

$613

DublinOntario

DUB - ONT

DUBONT

Dublin

jue. 4/2

9:50 am-10:26 pm

2 stops20h 36m

Ontario

mié. 4/15

7:00 am-7:20 am

2 stops16h 20m

$613

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 4/1

9:50 am-10:26 pm

2 stops20h 36m

Ontario

vie. 4/17

7:00 am-7:20 am

2 stops16h 20m

$613

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 4/1

9:50 am-10:26 pm

2 stops20h 36m

Ontario

jue. 4/16

7:00 am-7:20 am

2 stops16h 20m

$613

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 4/1

9:50 am-10:26 pm

2 stops20h 36m

Ontario

sáb. 4/11

7:00 am-7:20 am

2 stops16h 20m

$613

DublinOntario

DUB - ONT

DUBONT

Dublin

jue. 4/2

9:50 am-10:26 pm

2 stops20h 36m

Ontario

lun. 4/13

7:00 am-7:20 am

2 stops16h 20m

$613

DublinOntario

DUB - ONT

DUBONT

Dublin

jue. 4/2

9:50 am-10:26 pm

2 stops20h 36m

Ontario

jue. 4/16

7:00 am-7:20 am

2 stops16h 20m

$613

DublinOntario

DUB - ONT

DUBONT

Dublin

jue. 4/2

11:35 am-10:26 pm

1 stop18h 51m

Ontario

mar. 4/14

7:00 am-7:20 am

2 stops16h 20m

$619

DublinOntario

DUB - ONT

DUBONT

Dublin

lun. 4/6

12:30 pm-12:20 pm

2 stops31h 50m

Ontario

lun. 4/13

7:00 am-7:20 am

2 stops16h 20m

$619

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 1/21

9:00 am-12:47 pm

2 stops35h 47m

Ontario

mié. 1/28

1:24 pm-8:10 am

2 stops34h 46m

$693

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 31 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, February is the cheapest month in which you can book a flight from Ireland to Ontario (average of $436). Flying from Ireland to Ontario in July is currently the most expensive (average of $698). 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.

  • How long is the flight from Ireland to Ontario?

    For as low as $613, United Airlines can have you in Ontario from Ireland in 18h 56m. There are 5132 mi between Ireland and Ontario. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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, February is the cheapest month in which you can book a flight from Ireland to Ontario (average of $436). Flying from Ireland to Ontario in July is currently the most expensive (average of $698). 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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