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Ontario

$515+ Cheap flights from Dublin (DUB) 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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Mar 14 — Mar 211
Sat 3/14
Sat 3/21
1 adult, Economy
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Cheap 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 February 12, 2026.

This American Airlines deal was found by Cheapflights users on 2/11. 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 2/2711:30 am
DUB
-
ONT
2 stops20h 29m
American Airlines
Mon 3/211:58 pm
ONT
-
DUB
2 stops24h 42m
American Airlines
Deal found 2/11$515
This Iberia deal was found by Cheapflights users on 2/11. 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 9/2412:40 pm
DUB
-
ONT
1 stop17h 10m
Iberia
Mon 9/2810:56 am
ONT
-
DUB
1 stop14h 49m
Iberia
Deal found 2/11$556
This British Airways deal was found by Cheapflights users on 2/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:05 pm
DUB
-
ONT
2 stops30h 37m
British Airways
Sun 3/12:39 pm
ONT
-
DUB
2 stops19h 56m
British Airways
Deal found 2/10$571
This Trip.com deal was found by Cheapflights users on 2/10. 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.
Sun 9/1312:40 pm
DUB
-
ONT
1 stop17h 10m
Iberia
Sun 9/2710:56 am
ONT
-
DUB
1 stop14h 49m
Iberia
Deal found 2/10$580
This Kissandfly.com deal was found by Cheapflights users on 2/10. 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.
Thu 4/211:45 am
DUB
-
ONT
1 stop17h 39m
British Airways
Tue 4/710:59 am
ONT
-
DUB
1 stop14h 46m
British Airways
Deal found 2/10$638
This oojo deal was found by Cheapflights users on 2/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:45 am
DUB
-
ONT
2 stops22h 04m
British Airways
Tue 3/177:00 am
ONT
-
DUB
2 stops21h 15m
British Airways
Deal found 2/11$654
This lol.travel deal was found by Cheapflights users on 2/11. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/226:40 am
DUB
-
ONT
2 stops23h 49m
British Airways
Sat 3/711:58 pm
ONT
-
DUB
2 stops27h 17m
British Airways
Deal found 2/11$664
This Aer Lingus deal was found by Cheapflights users on 2/10. 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.
Wed 2/2512:30 pm
DUB
-
ONT
1 stop18h 27m
Multiple Airlines
Sun 3/16:09 am
ONT
-
DUB
1 stop22h 16m
Multiple Airlines
Deal found 2/10$675
This KLM deal was found by Cheapflights users on 2/10. 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.
Wed 2/255:55 am
DUB
-
ONT
2 stops23h 10m
KLM
Sun 3/110:20 pm
ONT
-
DUB
1 stop25h 25m
KLM
Deal found 2/10$701
This KLM deal was found by Cheapflights users on 2/12. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/275:55 am
DUB
-
ONT
2 stops23h 10m
KLM
Tue 3/31:15 pm
ONT
-
DUB
1 stop34h 30m
KLM
Deal found 2/12$702
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Fri 2/279:00 am
DUB
-
ONT
2 stops20h 59m
United Airlines
Mon 3/26:37 pm
ONT
-
DUB
2 stops31h 43m
United Airlines
Deal found 2/8$704

Find 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 February 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$515
(American Airlines)

Popular in

July

Cheapest in

January

Average price

$621
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 Dublin to Ontario
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($128 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 February 2026
Search Deals

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 February 12, 2026.
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 2/27

11:30 am-11:59 pm

2 stops20h 29m

Ontario

Mon 3/2

11:58 pm-8:40 am

2 stops24h 42m

$515

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 2/25

11:30 am-10:06 am

2 stops30h 36m

Ontario

Sun 3/1

7:00 am-8:40 am

2 stops17h 40m

$515

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 2/27

11:30 am-10:06 am

2 stops30h 36m

Ontario

Tue 3/3

7:00 am-8:40 am

2 stops17h 40m

$515

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 2/25

8:05 pm-6:42 pm

2 stops30h 37m

Ontario

Sun 3/1

2:39 pm-6:35 pm

2 stops19h 56m

$571

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 4/2

11:45 am-9:24 pm

1 stop17h 39m

Ontario

Tue 4/7

10:59 am-9:45 am

1 stop14h 46m

$638

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 3/3

8:45 am-10:49 pm

2 stops22h 04m

Ontario

Tue 3/17

7:00 am-11:15 am

2 stops21h 15m

$654

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 2/25

12:30 pm-10:57 pm

1 stop18h 27m

Ontario

Sun 3/1

6:09 am-12:25 pm

1 stop22h 16m

$675

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 2/25

5:55 am-9:05 pm

2 stops23h 10m

Ontario

Sun 3/1

10:20 pm-7:45 am

1 stop25h 25m

$701

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 2/27

5:55 am-9:05 pm

2 stops23h 10m

Ontario

Tue 3/3

1:15 pm-7:45 am

1 stop34h 30m

$702

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 2/27

9:00 am-9:59 pm

2 stops20h 59m

Ontario

Mon 3/2

6:37 pm-10:20 am

2 stops31h 43m

$704

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

Showing 1-10 of 20 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, February is the cheapest month in which you can book a flight from Dublin to Ontario (average of $459). Flying from Dublin to Ontario in July is currently the most expensive (average of $701). 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 20h 29m. Fly via American Airlines or British Airways 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, February is the cheapest month in which you can book a flight from Dublin to Ontario (average of $459). Flying from Dublin to Ontario in July is currently the most expensive (average of $701). 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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