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$546+ Cheap flights from Ireland to Ontario (ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
nov. 13 — nov. 201
jue. 11/13
jue. 11/20
1 adult, Economy
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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 octubre 14, 2025.

This Iberia deal was found by Cheapflights users on 10/14. 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.
vie. 11/1412:55 pmDUB - ONT
1 stop17h 34mIberia
dom. 11/167:00 amONT - DUB
1 stop16h 10mIberia
Deal found 10/14$567
This American Airlines deal was found by Cheapflights users on 10/12. 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. 10/3112:55 pmDUB - ONT
1 stop34h 33mAmerican Airlines
jue. 11/1310:47 amONT - DUB
1 stop12h 23mAmerican Airlines
Deal found 10/12$569
This American Airlines deal was found by Cheapflights users on 10/12. 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.
mié. 10/2910:20 amDUB - ONT
2 stops32h 38mAmerican Airlines
sáb. 11/112:59 amONT - DUB
1 stop23h 11mAmerican Airlines
Deal found 10/12$613
This Finnair deal was found by Cheapflights users on 10/12. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/2212:55 pmDUB - ONT
1 stop17h 19mMultiple Airlines
vie. 1/210:50 amONT - DUB
1 stop12h 20mMultiple Airlines
Deal found 10/12$615
This Iberia deal was found by Cheapflights users on 10/12. 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.
jue. 10/308:55 amDUB - ONT
2 stops22h 04mMultiple Airlines
jue. 11/610:47 amONT - DUB
1 stop12h 23mMultiple Airlines
Deal found 10/12$658
This Air France deal was found by Cheapflights users on 10/14. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/199:45 amDUB - ONT
1 stop17h 57mKLM
mié. 12/37:05 amONT - DUB
1 stop16h 40mKLM
Deal found 10/14$671
This Air France deal was found by Cheapflights users on 10/14. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/39:45 amDUB - ONT
1 stop17h 54mKLM
mié. 12/177:05 amONT - DUB
1 stop16h 40mKLM
Deal found 10/14$700
This Aer Lingus deal was found by Cheapflights users on 10/12. 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 Aer Lingus is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/2912:30 pmDUB - ONT
1 stop17h 21mMultiple Airlines
dom. 11/25:00 amONT - DUB
1 stop23h 10mMultiple Airlines
Deal found 10/12$749
This Air France deal was found by Cheapflights users on 10/14. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/249:45 amDUB - ONT
1 stop17h 57mMultiple Airlines
vie. 11/287:05 amONT - DUB
1 stop16h 40mMultiple Airlines
Deal found 10/14$829
This Delta deal was found by Cheapflights users on 10/12. 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.
mié. 10/295:55 amDUB - ONT
2 stops23h 46mDelta
dom. 11/211:36 amONT - DUB
2 stops20h 44mDelta
Deal found 10/12$833
This Finnair deal was found by Cheapflights users on 10/14. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/2712:55 pmDUB - ONT
1 stop16h 23mMultiple Airlines
dom. 11/910:47 amONT - DUB
1 stop12h 23mMultiple Airlines
Deal found 10/14$849

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 octubre 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$546
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$602
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
Highest demand for flights based on searches. 17% potential increase in price ($141 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 octubre 14, 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

mié. 2/25

10:20 am-11:43 pm

2 stops21h 23m

Ontario

dom. 3/1

11:05 am-4:50 pm

2 stops21h 45m

$546

DublinOntario

DUB - ONT

DUBONT

Dublin

lun. 11/17

12:55 pm-10:29 pm

1 stop17h 34m

Ontario

jue. 12/4

10:47 am-7:10 am

1 stop12h 23m

$567

DublinOntario

DUB - ONT

DUBONT

Dublin

lun. 12/22

12:55 pm-10:14 pm

1 stop17h 19m

Ontario

vie. 1/2

10:50 am-7:10 am

1 stop12h 20m

$615

DublinOntario

DUB - ONT

DUBONT

Dublin

sáb. 4/4

12:40 pm-8:15 pm

1 stop15h 35m

Ontario

sáb. 4/11

12:55 pm-9:45 am

1 stop12h 50m

$631

DublinOntario

DUB - ONT

DUBONT

Dublin

dom. 3/1

9:00 am-9:19 pm

2 stops44h 19m

Ontario

mar. 3/10

5:40 am-6:10 am

2 stops17h 30m

$660

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 2/25

9:45 am-9:14 pm

1 stop19h 29m

Ontario

dom. 3/1

6:45 am-7:45 am

2 stops17h 00m

$694

DublinOntario

DUB - ONT

DUBONT

Dublin

vie. 2/27

9:45 am-9:14 pm

1 stop19h 29m

Ontario

sáb. 3/7

10:30 pm-7:45 am

1 stop25h 15m

$696

DublinOntario

DUB - ONT

DUBONT

Dublin

sáb. 2/28

9:45 am-9:14 pm

1 stop19h 29m

Ontario

dom. 3/8

10:30 pm-7:45 am

1 stop26h 15m

$696

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 3/4

9:45 am-9:14 pm

1 stop19h 29m

Ontario

dom. 3/8

10:30 pm-7:45 am

1 stop26h 15m

$696

DublinOntario

DUB - ONT

DUBONT

Dublin

vie. 2/27

9:45 am-9:14 pm

1 stop19h 29m

Ontario

lun. 3/9

10:30 pm-7:45 am

1 stop26h 15m

$696

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Showing 1-10 of 25 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 $696). 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 $567, American Airlines can have you in Ontario from Ireland in 17h 34m. 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 $696). 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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