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$457+ Cheap flights from Ontario (ONT) to Dublin (DUB)

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 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Ontario to Dublin

Cheapest flights from Ontario to Dublin
Explore the most affordable flight options available from Ontario to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This Delta deal was found by Cheapflights users on 12/12. 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.
Sat 12/1312:12 pmONT - DUB
1 stop35h 33mDelta
Fri 12/269:45 amDUB - ONT
1 stop18h 05mDelta
Deal found 12/12$1,006
This Finnair deal was found by Cheapflights users on 12/13. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1410:47 amONT - DUB
1 stop12h 23mMultiple Airlines
Sun 12/2112:55 pmDUB - ONT
1 stop17h 19mMultiple Airlines
Deal found 12/13$1,209
This KLM deal was found by Cheapflights users on 12/13. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/147:05 amONT - DUB
1 stop16h 40mKLM
Wed 12/179:45 amDUB - ONT
1 stop17h 54mKLM
Deal found 12/13$1,399
This Finnair deal was found by Cheapflights users on 12/12. 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 12/1310:47 amONT - DUB
1 stop12h 23mMultiple Airlines
Sat 12/2012:55 pmDUB - ONT
1 stop17h 19mMultiple Airlines
Deal found 12/12$1,432
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/186:04 amONT - DUB
2 stops17h 26mUnited Airlines
Fri 12/2610:40 amDUB - ONT
1 stop19h 45mUnited Airlines
Deal found 12/15$1,453
This United Airlines deal was found by Cheapflights users on 12/12. 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.
Tue 12/166:00 amONT - DUB
2 stops17h 30mUnited Airlines
Wed 12/3110:40 amDUB - ONT
2 stops19h 12mUnited Airlines
Deal found 12/12$1,483
This oojo deal was found by Cheapflights users on 12/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2112:56 pmONT - DUB
1 stop34h 19mIberia
Wed 12/241:00 pmDUB - ONT
1 stop30h 53mIberia
Deal found 12/13$1,518
This oojo deal was found by Cheapflights users on 12/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/154:47 pmONT - DUB
2 stops16h 18mBritish Airways
Mon 12/228:40 pmDUB - ONT
2 stops33h 16mBritish Airways
Deal found 12/14$1,521
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Tue 12/165:05 amONT - DUB
2 stops20h 50mUnited Airlines
Sun 12/2810:40 amDUB - ONT
2 stops31h 21mUnited Airlines
Deal found 12/15$1,543
This Cheapflightsfares deal was found by Cheapflights users on 12/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1410:47 amONT - DUB
1 stop12h 23mMultiple Airlines
Thu 12/181:10 pmDUB - ONT
2 stops18h 36mMultiple Airlines
Deal found 12/13$1,562
This oojo deal was found by Cheapflights users on 12/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:53 pmONT - DUB
1 stop34h 17mIberia
Sat 12/209:40 amDUB - ONT
2 stops44h 34mIberia
Deal found 12/12$1,694

Find flight deals from Ontario to Dublin

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Dublin (DUB). 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 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$636
(oojo)

One-way from

$457
(oojo)

Popular in

May

Cheapest in

November

Average price

$819
Provider with most accurate pricing for Ontario-Dublin flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Dublin flights.
Search Deals
From Ontario to Dublin
Search Deals
One-way flight from Ontario to Dublin
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($123 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 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 Ontario to Dublin 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 15, 2025.
Use the filters below to find and compare flights from Ontario to Dublin that are best for you.

Fly from

Ontario

Fly to

Dublin

Route

Depart

Return

Price

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 2/19

5:06 pm-5:25 pm

2 stops16h 19m

Dublin

Mon 2/23

8:40 pm-4:24 pm

2 stops27h 44m

$669

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 1/11

4:45 pm-7:40 pm

2 stops18h 55m

Dublin

Sat 1/17

8:40 pm-5:22 pm

2 stops28h 42m

$669

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 1/16

5:05 am-7:10 am

2 stops18h 05m

Dublin

Fri 1/23

9:25 am-9:58 pm

2 stops20h 33m

$679

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 1/8

6:00 am-7:10 am

2 stops17h 10m

Dublin

Wed 1/14

9:00 am-8:58 pm

2 stops19h 58m

$687

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 1/5

11:59 pm-8:10 am

1 stop24h 11m

Dublin

Sun 1/11

9:00 am-11:18 am

3 stops34h 18m

$688

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 1/30

5:05 am-7:30 am

2 stops18h 25m

Dublin

Tue 2/3

9:30 am-10:53 pm

2 stops21h 23m

$690

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 1/9

6:00 am-7:30 am

2 stops17h 30m

Dublin

Tue 1/13

10:40 am-8:58 pm

2 stops18h 18m

$690

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 1/16

6:00 am-7:10 am

2 stops17h 10m

Dublin

Fri 1/23

10:40 am-12:17 pm

3 stops33h 37m

$696

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 1/22

11:59 pm-10:00 am

2 stops26h 01m

Dublin

Fri 1/30

8:55 am-10:48 pm

2 stops21h 53m

$712

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 3/15

5:02 pm-4:50 pm

2 stops16h 48m

$457

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 19 results
1
2

Compare providers for flights from Ontario to Dublin

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 Ontario to Dublin in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
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 Ontario-Dublin flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Dublin flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Dublin flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Dublin 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 Ontario-Dublin 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 Ontario to Dublin

Have a flexible travel schedule? Discover the best time to fly to Dublin from Ontario 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 Ontario to Dublin

What is the cheapest month to book a flight from Ontario to Dublin?

Currently, November is the cheapest month in which you can book a flight from Ontario to Dublin (average of $455). Flying from Ontario to Dublin in June is currently the most expensive (average of $682). 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.

What is the cheapest time of day to fly from ONT to DUB?

Find hourly flight availability from Ontario to Dublin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

One of the essential ways to save on airfare from Ontario to Dublin is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 18% on airfare.

Reviews of airlines servicing Dublin

Get insights into the airlines that provide service to Dublin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dublin. Reviews last updated December 15, 2025.
Peruse reviews from past customers who have flown with Delta, American Airlines, and Iberia from Ontario to Dublin to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
7.9
Good
8,010 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
11,048 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
3,052 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Dublin. 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 Ontario to Dublin?

    For as low as $669, British Airways can have you in Dublin from Ontario in 16h 19m. There are 5132 mi between Ontario and Dublin. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Ontario to Dublin round-trip?

    Cheapflights users have booked flights from Ontario to Dublin round-trip from $527. Other airlines that can offer you cheap pricing are Iberia, from $547, and American Airlines, from $677. Users have found that Delta is 38% cheaper than the other options available to this destination.

  • Can I find deals for flights from Ontario to Dublin that include hotel bookings?

    Yes. In addition to deals on Ontario to Dublin flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Dublin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Dublin.

  • Can I find deals for business class flights from Ontario to Dublin?

    Yes. Cheapflights offers flight deals from Ontario to Dublin 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 Ontario to Dublin?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Dublin (average of $455). Flying from Ontario to Dublin in June is currently the most expensive (average of $682). 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

Traveling to a place near Dublin?

Book flights to Dublin if you plan to visit one of these locations
Maynooth
Castleknock
Wicklow
Leixlip

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Top 3 airlines flying from Ontario to Dublin

Discover the top 3 airlines that operate flights from Ontario to Dublin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$527Average$846FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$547Average$891FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$677Average$975FlexibilityNo cancel feeOn-time71%

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