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$606+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Mar 11 — Mar 181
Wed 3/11
Wed 3/18
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 9, 2026.

This KLM deal was found by Cheapflights users on 2/7. 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.
Tue 2/245:55 am
DUB
-
ONT
2 stops23h 10m
KLM
Sat 2/2810:20 pm
ONT
-
DUB
1 stop25h 25m
KLM
Deal found 2/7$697
This United Airlines deal was found by Cheapflights users on 2/6. 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 3/25:00 am
ONT
-
DUB
2 stops19h 10m
United Airlines
Deal found 2/6$703
This Trip.com deal was found by Cheapflights users on 2/6. 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.
Fri 2/135:15 pm
DUB
-
ONT
2 stops37h 22m
Multiple Airlines
Thu 2/261:15 pm
ONT
-
DUB
1 stop34h 30m
Multiple Airlines
Deal found 2/6$760
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:55 am
DUB
-
ONT
2 stops18h 19m
Multiple Airlines
Thu 12/310:59 pm
ONT
-
DUB
1 stop24h 46m
Multiple Airlines
Deal found 2/8$773
This KLM deal was found by Cheapflights users on 2/7. 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 4/1511:00 am
DUB
-
ONT
1 stop15h 33m
KLM
Thu 4/237:05 am
ONT
-
DUB
1 stop17h 40m
KLM
Deal found 2/7$810
This Trip.com deal was found by Cheapflights users on 2/7. 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 2/155:15 pm
DUB
-
ONT
2 stops30h 47m
KLM
Mon 3/21:15 pm
ONT
-
DUB
1 stop34h 30m
KLM
Deal found 2/7$820
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 2/2712:05 pm
DUB
-
ONT
2 stops18h 52m
United Airlines
Fri 3/66:15 am
ONT
-
DUB
2 stops19h 40m
United Airlines
Deal found 2/8$843
This Iberia deal was found by Cheapflights users on 2/6. 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 9/1112:40 pm
DUB
-
ONT
1 stop17h 10m
Iberia
Fri 9/2510:56 am
ONT
-
DUB
1 stop14h 49m
Iberia
Deal found 2/6$855
This Trip.com deal was found by Cheapflights users on 2/7. 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 2/155:15 pm
DUB
-
ONT
2 stops30h 47m
Multiple Airlines
Sun 3/11:15 pm
ONT
-
DUB
1 stop34h 30m
Multiple Airlines
Deal found 2/7$870

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 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$697
(KLM)

One-way from

$606
(Kiwi.com)

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
One-way flight 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 9, 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

Tue 2/24

5:55 am-9:05 pm

2 stops23h 10m

Ontario

Sat 2/28

10:20 pm-7:45 am

1 stop25h 25m

$697

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 2/27

9:00 am-9:59 pm

2 stops20h 59m

Ontario

Mon 3/2

9:06 pm-9:55 am

2 stops28h 49m

$703

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 2/27

12:05 pm-10:57 pm

2 stops18h 52m

Ontario

Fri 3/6

6:15 am-9:55 am

2 stops19h 40m

$843

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 6/25

9:50 am-10:28 pm

2 stops20h 38m

Ontario

Thu 7/9

5:00 am-7:20 am

2 stops18h 20m

$946

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 4/1

9:30 am-10:30 pm

1 stop21h 00m

Ontario

Mon 4/13

10:59 am-9:45 am

1 stop14h 46m

$948

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 3/9

6:40 am-6:42 pm

2 stops19h 02m

Ontario

Wed 3/25

2:39 pm-3:40 pm

2 stops18h 01m

$973

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 3/4

6:40 am-10:49 pm

2 stops24h 09m

Ontario

Wed 3/18

2:39 pm-3:40 pm

2 stops18h 01m

$973

DublinOntario

DUB - ONT

DUBONT

Dublin

Sun 3/8

7:35 am-9:30 pm

2 stops21h 55m

Ontario

Tue 3/24

3:19 pm-3:40 pm

2 stops17h 21m

$973

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 3/10

12:05 pm-10:06 am

2 stops29h 01m

Ontario

Tue 3/24

3:19 pm-3:40 pm

2 stops17h 21m

$973

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 8/3

9:40 am-3:13 pm

3 stops37h 33m

$634

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 59m. Fly via KLM or United Airlines 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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