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$558+ 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 11/24. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
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 septiembre 15, 2025.

Round-trip from

$552
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$641
From Dublin to Ontario
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Highest demand for flights based on searches. 16% potential increase in price ($137 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 September 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 septiembre 15, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/305:55 amDUB - ONT
2 stops18h 15mDelta
jue. 11/67:35 amONT - DUB
2 stops24h 10mDelta
Deal found 9/15$560
This KLM deal was found by Cheapflights users on 9/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/125:55 amDUB - ONT
2 stops19h 14mKLM
mié. 11/267:05 amONT - DUB
1 stop16h 40mKLM
Deal found 9/14$563
This Iberia deal was found by Cheapflights users on 9/15. 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.
lun. 11/312:55 pmDUB - ONT
1 stop17h 34mIberia
dom. 11/167:00 amONT - DUB
1 stop16h 10mIberia
Deal found 9/15$572
This Finnair deal was found by Cheapflights users on 9/14. 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.
sáb. 11/112:55 pmDUB - ONT
1 stop16h 47mMultiple Airlines
vie. 11/1410:47 amONT - DUB
1 stop12h 23mMultiple Airlines
Deal found 9/14$573
This KLM deal was found by Cheapflights users on 9/15. 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.
lun. 10/612:00 pmDUB - ONT
1 stop15h 19mKLM
lun. 10/2011:36 amONT - DUB
1 stop13h 09mKLM
Deal found 9/15$577
This Finnair deal was found by Cheapflights users on 9/15. 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 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 9/15$597
This Trip.com deal was found by Cheapflights users on 9/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/411:35 amDUB - ONT
1 stop14h 31mUnited Airlines
dom. 10/267:00 amONT - DUB
1 stop18h 10mUnited Airlines
Deal found 9/14$600
This Iberia deal was found by Cheapflights users on 9/15. 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.
mié. 10/112:40 pmDUB - ONT
1 stop14h 14mIberia
dom. 10/512:45 pmONT - DUB
1 stop13h 00mIberia
Deal found 9/15$601
This Iberia deal was found by Cheapflights users on 9/14. 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. 11/2112:55 pmDUB - ONT
1 stop17h 28mIberia
sáb. 11/2910:47 amONT - DUB
1 stop12h 23mIberia
Deal found 9/14$608
This Iberia deal was found by Cheapflights users on 9/15. 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.
sáb. 12/1312:55 pmDUB - ONT
1 stop17h 33mIberia
mar. 12/306:10 amONT - DUB
1 stop17h 05mIberia
Deal found 9/15$616
This Iberia deal was found by Cheapflights users on 9/15. 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.
lun. 10/1312:40 pmDUB - ONT
1 stop17h 38mIberia
jue. 10/2310:57 amONT - DUB
1 stop14h 48mIberia
Deal found 9/15$624
This KLM deal was found by Cheapflights users on 9/15. 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.
mié. 11/129:45 amDUB - ONT
1 stop17h 52mKLM
mié. 11/197:05 amONT - DUB
1 stop16h 40mKLM
Deal found 9/15$663

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 septiembre 15, 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

jue. 10/30

5:55 am-5:10 pm

2 stops18h 15m

Ontario

jue. 11/6

7:35 am-3:45 pm

2 stops24h 10m

$560

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 11/12

5:55 am-11:04 pm

2 stops25h 09m

Ontario

mié. 11/26

11:45 am-3:45 pm

2 stops20h 00m

$560

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 11/12

5:55 am-5:09 pm

2 stops19h 14m

Ontario

mié. 11/26

7:05 am-7:45 am

1 stop16h 40m

$563

DublinOntario

DUB - ONT

DUBONT

Dublin

sáb. 11/1

12:55 pm-10:42 pm

1 stop16h 47m

Ontario

vie. 11/14

10:47 am-7:10 am

1 stop12h 23m

$573

DublinOntario

DUB - ONT

DUBONT

Dublin

vie. 11/21

9:45 am-7:37 pm

1 stop17h 52m

Ontario

vie. 11/28

7:05 am-7:45 am

1 stop16h 40m

$573

DublinOntario

DUB - ONT

DUBONT

Dublin

lun. 10/6

12:00 pm-7:19 pm

1 stop15h 19m

Ontario

lun. 10/20

11:36 am-8:45 am

1 stop13h 09m

$577

DublinOntario

DUB - ONT

DUBONT

Dublin

lun. 10/27

12:55 pm-10:18 pm

1 stop16h 23m

Ontario

dom. 11/9

10:47 am-7:10 am

1 stop12h 23m

$597

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 2/25

10:45 am-9:14 pm

2 stops18h 29m

Ontario

dom. 3/1

10:30 pm-7:45 am

1 stop25h 15m

$597

DublinOntario

DUB - ONT

DUBONT

Dublin

sáb. 10/4

11:35 am-6:06 pm

1 stop14h 31m

Ontario

dom. 10/26

7:00 am-8:10 am

1 stop18h 10m

$600

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 10/1

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

dom. 10/5

12:45 pm-9:45 am

1 stop13h 00m

$601

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 22 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.

  • How long is the flight from Dublin to Ontario?

    There are many flights that can get you from Dublin to Ontario in 18h 15m. Fly via American Airlines, Delta, or KLM to get the fastest option. Airlines will cover a distance of 5132 mi. This flight may include one or multiple stops.

  • 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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