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Ontario

$500+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
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 December 9, 2025.

This United Airlines deal was found by Cheapflights users on 12/9. 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 12/2412:05 pmDUB - ONT
2 stops32h 33mUnited Airlines
Sun 12/2811:59 pmONT - DUB
1 stop24h 11mUnited Airlines
Deal found 12/9$756
This United Airlines deal was found by Cheapflights users on 12/9. 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 12/2610:40 amDUB - ONT
1 stop19h 45mUnited Airlines
Sat 1/175:05 amONT - DUB
2 stops18h 25mUnited Airlines
Deal found 12/9$791
This Finnair deal was found by Cheapflights users on 12/9. 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.
Wed 12/241:00 pmDUB - ONT
1 stop28h 38mMultiple Airlines
Sun 12/287:10 amONT - DUB
1 stop16h 00mMultiple Airlines
Deal found 12/9$793
This Finnair deal was found by Cheapflights users on 12/8. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1412:55 pmDUB - ONT
1 stop17h 20mMultiple Airlines
Sat 12/2710:50 amONT - DUB
1 stop12h 20mMultiple Airlines
Deal found 12/8$886
This Delta deal was found by Cheapflights users on 12/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:50 amDUB - ONT
2 stops22h 33mDelta
Sun 1/1812:41 pmONT - DUB
2 stops19h 04mDelta
Deal found 12/7$895
This Iberia deal was found by Cheapflights users on 12/7. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/712:55 pmDUB - ONT
1 stop17h 20mIberia
Thu 12/117:03 amONT - DUB
1 stop16h 07mIberia
Deal found 12/7$979
This Finnair deal was found by Cheapflights users on 12/9. 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.
Sun 12/1412:55 pmDUB - ONT
1 stop17h 20mMultiple Airlines
Sun 12/2110:50 amONT - DUB
1 stop12h 20mMultiple Airlines
Deal found 12/9$1,142
This American Airlines deal was found by Cheapflights users on 12/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:00 pmDUB - ONT
1 stop28h 38mAmerican Airlines
Sat 12/277:10 amONT - DUB
1 stop16h 00mAmerican Airlines
Deal found 12/7$1,247
This Air Canada deal was found by Cheapflights users on 12/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:00 amDUB - ONT
2 stops20h 07mAir Canada
Sun 12/285:05 amONT - DUB
2 stops18h 05mAir Canada
Deal found 12/8$1,352
This KLM deal was found by Cheapflights users on 12/9. 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 12/109:45 amDUB - ONT
1 stop17h 54mKLM
Fri 12/267:05 amONT - DUB
1 stop16h 40mKLM
Deal found 12/9$1,388
This Air Canada deal was found by Cheapflights users on 12/9. 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.
Fri 12/269:00 amDUB - ONT
2 stops16h 43mMultiple Airlines
Sat 1/176:00 amONT - DUB
2 stops17h 10mMultiple Airlines
Deal found 12/9$1,426

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 December 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$685
(Delta)

One-way from

$500
(JetBlue)

Popular in

July

Cheapest in

February

Average price

$699
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
One-way flight from Dublin to Ontario
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($139 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 9, 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 1/21

5:55 am-9:05 pm

2 stops23h 10m

Ontario

Wed 1/28

10:30 pm-3:45 pm

2 stops33h 15m

$685

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 3/4

9:00 am-10:57 pm

2 stops21h 57m

Ontario

Sun 3/8

11:59 pm-8:10 am

1 stop25h 11m

$692

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 1/21

9:00 am-11:18 am

3 stops58h 18m

Ontario

Wed 1/28

8:00 am-7:30 am

2 stops15h 30m

$692

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 1/12

1:00 pm-10:08 am

2 stops29h 08m

Ontario

Sun 1/25

4:45 pm-4:50 pm

2 stops16h 05m

$698

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 4/1

12:45 pm-11:59 pm

2 stops19h 14m

Ontario

Sun 4/5

10:56 am-11:55 am

2 stops16h 59m

$702

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 4/2

12:40 pm-11:59 pm

1 stop19h 19m

Ontario

Tue 4/7

11:01 am-11:55 am

2 stops16h 54m

$705

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 4/3

12:40 pm-10:07 pm

2 stops17h 27m

Ontario

Sun 4/5

10:56 am-11:55 am

2 stops16h 59m

$705

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 4/3

12:40 pm-9:24 pm

1 stop16h 44m

Ontario

Mon 4/6

7:00 am-9:40 am

2 stops18h 40m

$705

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 5/5

11:45 am-10:09 pm

1 stop18h 24m

$500

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 2/7

11:30 am-10:48 pm

2 stops19h 18m

$613

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 18 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 December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 $695). 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 57m. Fly via Delta 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 $436). Flying from Dublin to Ontario in July is currently the most expensive (average of $695). 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.

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