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Ontario

$516+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Feb 18 — Feb 251
Wed 2/18
Wed 2/25
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 January 19, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$492
(British Airways)

Popular in

July

Cheapest in

February

Average price

$586
Provider with most accurate pricing for Dublin-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Dublin-Los Angeles flights.
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From Dublin to Ontario
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Highest demand for flights based on searches. 16% potential increase in price ($138 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 January 2026
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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 January 19, 2026.

This KLM deal was found by Cheapflights users on 1/18. 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 2/45:55 am
DUB
-
ONT
2 stops23h 10m
Multiple Airlines
Sun 2/86:00 am
ONT
-
DUB
2 stops25h 45m
Multiple Airlines
Deal found 1/18$516
This Iberia deal was found by Cheapflights users on 1/18. 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 10/2212:40 pm
DUB
-
ONT
1 stop17h 11m
Iberia
Thu 11/57:00 am
ONT
-
DUB
1 stop16h 15m
Iberia
Deal found 1/18$518
This Iberia deal was found by Cheapflights users on 1/18. 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 4/89:30 am
DUB
-
ONT
1 stop21h 05m
Iberia
Tue 4/1410:59 am
ONT
-
DUB
1 stop14h 46m
Iberia
Deal found 1/18$541
This American Airlines deal was found by Cheapflights users on 1/18. 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 4/19:30 am
DUB
-
ONT
1 stop21h 00m
American Airlines
Tue 4/710:59 am
ONT
-
DUB
1 stop14h 46m
American Airlines
Deal found 1/18$555
This Trip.com deal was found by Cheapflights users on 1/19. 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 4/129:30 am
DUB
-
ONT
1 stop21h 05m
Iberia
Sat 4/2510:59 am
ONT
-
DUB
1 stop14h 46m
Iberia
Deal found 1/19$573
This Delta deal was found by Cheapflights users on 1/18. 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.
Fri 2/205:55 am
DUB
-
ONT
2 stops24h 42m
Delta
Tue 3/310:20 pm
ONT
-
DUB
1 stop25h 25m
Delta
Deal found 1/18$623
This Delta deal was found by Cheapflights users on 1/18. 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.
Sun 2/229:45 am
DUB
-
ONT
1 stop19h 20m
Delta
Tue 3/36:00 am
ONT
-
DUB
2 stops17h 45m
Delta
Deal found 1/18$632
This Iberia deal was found by Cheapflights users on 1/18. 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.
Tue 3/319:30 am
DUB
-
ONT
1 stop21h 19m
Iberia
Sun 4/510:56 am
ONT
-
DUB
1 stop14h 49m
Iberia
Deal found 1/18$737
This Iberia deal was found by Cheapflights users on 1/18. 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 4/19:30 am
DUB
-
ONT
1 stop21h 00m
Iberia
Wed 4/810:59 am
ONT
-
DUB
1 stop14h 46m
Iberia
Deal found 1/18$739
This Air Canada deal was found by Cheapflights users on 1/18. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/219:00 am
DUB
-
ONT
2 stops19h 50m
Air Canada
Tue 3/35:00 am
ONT
-
DUB
2 stops18h 10m
Air Canada
Deal found 1/18$741

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 January 19, 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

Wed 4/8

9:30 am-10:35 pm

1 stop21h 05m

Ontario

Tue 4/14

10:59 am-9:45 am

1 stop14h 46m

$541

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 7/9

9:20 am-8:17 pm

2 stops42h 57m

Ontario

Sat 7/18

6:00 am-8:15 am

2 stops42h 15m

$879

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 7/8

11:00 am-6:01 pm

1 stop15h 01m

Ontario

Sun 7/19

10:59 pm-8:45 am

1 stop25h 46m

$1,013

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 7/9

11:00 am-6:01 pm

1 stop15h 01m

Ontario

Sun 7/19

10:59 pm-8:45 am

1 stop25h 46m

$1,013

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 7/10

11:00 am-6:01 pm

1 stop15h 01m

Ontario

Sun 7/19

7:00 am-8:45 am

1 stop17h 45m

$1,013

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 7/10

9:20 am-10:26 pm

2 stops21h 06m

Ontario

Sun 7/19

7:00 am-8:15 am

2 stops17h 15m

$1,050

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 7/10

12:40 pm-7:52 pm

1 stop15h 12m

Ontario

Fri 7/17

1:10 pm-5:50 pm

2 stops20h 40m

$1,062

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 7/10

12:40 pm-10:36 pm

1 stop17h 56m

Ontario

Sat 7/18

12:46 pm-9:45 am

1 stop12h 59m

$1,072

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 4/8

12:15 pm-9:50 pm

2 stops17h 35m

Ontario

Tue 4/14

10:59 am-11:05 am

2 stops16h 06m

$1,105

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 7/9

11:45 am-9:57 pm

1 stop18h 12m

Ontario

Sat 7/18

12:46 pm-9:45 am

1 stop12h 59m

$1,118

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 23 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 $436). 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 21h 05m. Fly via British Airways, American Airlines, or Iberia 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 $436). 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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