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$442+ Cheap flights from Dublin (DUB) 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 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
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Cheap flight deals from Dublin to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Dublin (DUB) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 16, 2025.

Round-trip from

$590
(Finnair)

One-way from

$442
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$829
From Dublin to Ontario
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One-way flight from Dublin 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 Dublin to Ontario

Cheapest flights from Dublin to Ontario
Explore the most affordable flight options available from Dublin to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

This Finnair deal was found by Cheapflights users on 8/14. 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.
Sat 11/1512:55 pmDUB - ONT
1 stop17h 34mMultiple Airlines
Fri 11/2110:47 amONT - DUB
1 stop12h 23mMultiple Airlines
Deal found 8/14$590
This Finnair deal was found by Cheapflights users on 8/14. 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.
Sun 12/2112:55 pmDUB - ONT
1 stop17h 08mMultiple Airlines
Sat 12/278:47 amONT - DUB
1 stop14h 23mMultiple Airlines
Deal found 8/14$593
This Iberia deal was found by Cheapflights users on 8/14. 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.
Wed 9/38:30 amDUB - ONT
2 stops18h 24mMultiple Airlines
Sat 9/138:15 amONT - DUB
1 stop17h 30mMultiple Airlines
Deal found 8/14$594
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 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:35 amDUB - ONT
2 stops18h 19mAmerican Airlines
Thu 9/1812:45 pmONT - DUB
1 stop13h 00mAmerican Airlines
Deal found 8/14$596
This American Airlines deal was found by Cheapflights users on 8/14. 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 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 8/14$597
This American Airlines deal was found by Cheapflights users on 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/38:30 amDUB - ONT
2 stops18h 24mAmerican Airlines
Sat 9/131:10 pmONT - DUB
2 stops14h 30mAmerican Airlines
Deal found 8/14$606
This Delta deal was found by Cheapflights users on 8/13. 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.
Tue 10/1411:00 amDUB - ONT
1 stop16h 19mDelta
Wed 10/2211:36 amONT - DUB
1 stop13h 09mDelta
Deal found 8/13$626
This Iberia deal was found by Cheapflights users on 8/14. 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.
Fri 9/512:40 pmDUB - ONT
1 stop14h 14mIberia
Sat 9/2010:53 amONT - DUB
1 stop14h 52mIberia
Deal found 8/14$632
This American Airlines deal was found by Cheapflights users on 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/309:30 amDUB - ONT
2 stops16h 54mAmerican Airlines
Wed 9/34:45 pmONT - DUB
2 stops16h 45mAmerican Airlines
Deal found 8/14$667
This Iberia deal was found by Cheapflights users on 8/14. 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.
Sat 8/309:10 amDUB - ONT
2 stops21h 38mMultiple Airlines
Wed 9/32:54 pmONT - DUB
2 stops18h 36mMultiple Airlines
Deal found 8/14$674
This American Airlines deal was found by Cheapflights users on 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/3012:40 pmDUB - ONT
1 stop13h 44mAmerican Airlines
Sat 9/1312:47 pmONT - DUB
1 stop12h 58mAmerican Airlines
Deal found 8/14$686

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dublin 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 16, 2025.
Use the filters below to find and compare flights from Dublin to Ontario that are best for you.

Fly from

Dublin

Fly to

Ontario

Route

Depart

Return

Price

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 12/12

12:55 pm-9:58 pm

1 stop17h 03m

Ontario

Mon 12/22

11:00 am-7:10 am

1 stop12h 10m

$590

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 12/13

12:55 pm-9:58 pm

1 stop17h 03m

Ontario

Mon 12/22

8:47 am-7:10 am

1 stop14h 23m

$590

DublinOntario

DUB - ONT

DUBONT

Dublin

Sun 12/21

12:55 pm-10:03 pm

1 stop17h 08m

Ontario

Sat 12/27

8:47 am-7:10 am

1 stop14h 23m

$593

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

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

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

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

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 9/24

12:50 pm-11:38 pm

3 stops42h 48m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 19 results
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Best time to book a flight from Dublin to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Dublin 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 Dublin to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Dublin to Ontario (average of $246). Flying from Dublin 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 Dublin to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dublin 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 Dublin to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Dublin to Ontario (average of $246). Flying from Dublin 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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