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Ontario

$498+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Dec 14 — Dec 211
Sun 12/14
Sun 12/21
1 adult, Economy
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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 November 14, 2025.

This American Airlines deal was found by Cheapflights users on 11/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2811:30 amDUB - ONT
2 stops30h 27mAmerican Airlines
Tue 12/23:19 pmONT - DUB
2 stops17h 41mAmerican Airlines
Deal found 11/12$501
This American Airlines deal was found by Cheapflights users on 11/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2811:30 amDUB - ONT
2 stops36h 31mAmerican Airlines
Thu 12/410:34 pmONT - DUB
2 stops34h 26mAmerican Airlines
Deal found 11/14$503
This TravelUp deal was found by Cheapflights users on 11/12. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2112:55 pmDUB - ONT
1 stop14h 28mIberia
Thu 12/410:47 amONT - DUB
1 stop12h 23mIberia
Deal found 11/12$509
This Iberia deal was found by Cheapflights users on 11/13. 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 11/2112:55 pmDUB - ONT
1 stop14h 28mIberia
Fri 12/510:47 amONT - DUB
1 stop12h 23mIberia
Deal found 11/13$520
This American Airlines deal was found by Cheapflights users on 11/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2112:55 pmDUB - ONT
1 stop14h 28mAmerican Airlines
Thu 12/410:47 amONT - DUB
1 stop12h 23mAmerican Airlines
Deal found 11/14$522
This Finnair deal was found by Cheapflights users on 11/14. 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.
Fri 11/2811:30 amDUB - ONT
2 stops17h 41mMultiple Airlines
Fri 12/56:00 amONT - DUB
1 stop17h 10mMultiple Airlines
Deal found 11/14$534
This Finnair deal was found by Cheapflights users on 11/12. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:55 pmDUB - ONT
1 stop17h 33mMultiple Airlines
Fri 12/2610:50 amONT - DUB
1 stop12h 20mMultiple Airlines
Deal found 11/12$643
This United Airlines deal was found by Cheapflights users on 11/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/289:30 amDUB - ONT
2 stops21h 21mUnited Airlines
Tue 12/26:41 pmONT - DUB
3 stops31h 14mUnited Airlines
Deal found 11/12$671
This United Airlines deal was found by Cheapflights users on 11/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2712:05 pmDUB - ONT
2 stops32h 32mUnited Airlines
Thu 12/46:00 amONT - DUB
2 stops18h 10mUnited Airlines
Deal found 11/14$673
This Aer Lingus deal was found by Cheapflights users on 11/12. 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 Aer Lingus is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2812:30 pmDUB - ONT
1 stop15h 11mMultiple Airlines
Tue 12/21:50 pmONT - DUB
1 stop13h 35mMultiple Airlines
Deal found 11/12$676
This Delta deal was found by Cheapflights users on 11/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/289:45 amDUB - ONT
1 stop17h 57mDelta
Tue 12/26:40 amONT - DUB
2 stops25h 05mDelta
Deal found 11/12$691

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 November 14, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$498
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$619
Provider with most accurate pricing for Dublin-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Dublin-Ontario flights.
Search Deals
From Dublin to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($142 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 November 2025
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 November 14, 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

Wed 2/25

10:20 am-10:51 pm

2 stops20h 31m

Ontario

Sun 3/1

2:47 pm-4:50 pm

2 stops18h 03m

$498

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 11/28

11:30 am-4:01 pm

2 stops36h 31m

Ontario

Thu 12/4

10:34 pm-5:00 pm

2 stops34h 26m

$503

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 11/28

11:30 am-9:11 pm

2 stops17h 41m

Ontario

Tue 12/2

7:00 am-8:40 am

2 stops17h 40m

$520

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 11/28

11:30 am-10:23 pm

2 stops18h 53m

Ontario

Fri 12/5

7:00 am-8:40 am

2 stops17h 40m

$534

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 12/13

12:55 pm-10:28 pm

1 stop17h 33m

Ontario

Fri 12/26

10:50 am-7:10 am

1 stop12h 20m

$643

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 11/28

9:30 am-10:51 pm

2 stops21h 21m

Ontario

Tue 12/2

6:41 pm-9:55 am

3 stops31h 14m

$671

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 11/27

12:05 pm-12:37 pm

2 stops32h 32m

Ontario

Thu 12/4

6:00 am-8:10 am

2 stops18h 10m

$673

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 1/30

12:30 pm-10:53 pm

1 stop18h 23m

Ontario

Fri 2/6

6:00 am-11:25 am

1 stop21h 25m

$677

DublinOntario

DUB - ONT

DUBONT

Dublin

Sun 2/1

11:30 am-10:13 pm

2 stops18h 43m

$590

DublinOntario

DUB - ONT

DUBONT

Dublin

Sun 3/15

11:30 am-9:40 pm

2 stops17h 10m

$598

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

Showing 1-10 of 19 results
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Compare providers for flights from Dublin to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dublin to Ontario in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Dublin-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Dublin-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Dublin-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Dublin-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Dublin-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 $697). 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 31m. Fly via American Airlines 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 $436). Flying from Dublin to Ontario in July is currently the most expensive (average of $697). 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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