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$482+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Mar 24 — Mar 311
Tue 3/24
Tue 3/31
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 22, 2026.

This Delta deal was found by Cheapflights users on 2/18. 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.
Thu 3/55:55 am
DUB
-
ONT
2 stops23h 10m
Delta
Mon 3/910:25 pm
ONT
-
DUB
1 stop26h 20m
Delta
Deal found 2/18$528
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:55 am
DUB
-
ONT
2 stops23h 10m
Delta
Wed 3/1111:59 am
ONT
-
DUB
2 stops21h 21m
Delta
Deal found 2/19$530
This American Airlines deal was found by Cheapflights users on 2/18. 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.
Fri 2/2711:30 am
DUB
-
ONT
2 stops34h 19m
American Airlines
Mon 3/22:39 pm
ONT
-
DUB
2 stops18h 26m
American Airlines
Deal found 2/18$536
This Trip.com deal was found by Cheapflights users on 2/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/25:15 pm
DUB
-
ONT
2 stops30h 47m
KLM
Mon 3/911:59 am
ONT
-
DUB
2 stops17h 41m
KLM
Deal found 2/18$553
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 3/168:00 am
DUB
-
ONT
2 stops21h 18m
United Airlines
Tue 3/246:15 am
ONT
-
DUB
2 stops18h 55m
United Airlines
Deal found 2/20$613
This Air Canada deal was found by Cheapflights users on 2/21. 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.
Wed 10/149:20 am
DUB
-
ONT
2 stops39h 58m
Air Canada
Mon 10/195:00 am
ONT
-
DUB
2 stops43h 15m
Air Canada
Deal found 2/21$614
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 3/1610:40 am
DUB
-
ONT
1 stop18h 38m
United Airlines
Mon 3/306:49 pm
ONT
-
DUB
2 stops30h 56m
United Airlines
Deal found 2/20$617
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Thu 10/159:50 am
DUB
-
ONT
2 stops20h 36m
United Airlines
Mon 10/195:00 am
ONT
-
DUB
2 stops18h 30m
United Airlines
Deal found 2/21$619
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Wed 10/1411:35 am
DUB
-
ONT
1 stop18h 51m
United Airlines
Tue 10/207:00 am
ONT
-
DUB
1 stop18h 45m
United Airlines
Deal found 2/21$623
This Delta deal was found by Cheapflights users on 2/21. 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.
Wed 4/811:00 am
DUB
-
ONT
1 stop32h 47m
Delta
Wed 4/151:29 pm
ONT
-
DUB
2 stops19h 11m
Delta
Deal found 2/21$624

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 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$528
(Delta)

One-way from

$482
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$632
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
One-way flight from Dublin to Ontario
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($127 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 22, 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

Thu 3/5

8:50 am-9:05 pm

2 stops20h 15m

Ontario

Mon 3/9

10:25 pm-7:45 am

2 stops26h 20m

$528

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 3/7

5:55 am-9:05 pm

2 stops23h 10m

Ontario

Wed 3/11

11:59 am-4:20 pm

2 stops21h 21m

$530

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 4/8

5:55 am-10:34 pm

2 stops24h 39m

Ontario

Wed 4/15

1:29 pm-4:40 pm

2 stops19h 11m

$613

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 4/13

11:35 am-10:26 pm

1 stop18h 51m

Ontario

Mon 7/6

6:30 am-9:45 am

1 stop19h 15m

$623

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 3/11

8:00 am-10:57 pm

2 stops21h 57m

Ontario

Sun 3/15

11:59 pm-7:30 am

2 stops24h 31m

$659

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 3/10

10:40 am-10:18 pm

1 stop18h 38m

Ontario

Mon 3/30

5:10 am-7:30 am

2 stops18h 20m

$662

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 3/12

10:40 am-10:18 pm

1 stop18h 38m

Ontario

Mon 3/30

5:10 am-7:30 am

2 stops18h 20m

$662

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 4/15

12:15 pm-8:24 am

3 stops28h 09m

$482

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 6/3

11:40 am-10:09 pm

1 stop18h 29m

$521

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 5/19

11:40 am-10:09 pm

1 stop18h 29m

$521

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/22

Showing 1-10 of 19 results
1
2

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 $460). 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 15m. Fly via Delta to get the fastest option. Airlines will cover a distance of 5132 mi.

  • 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 $460). 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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