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$465+ 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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$547
(United Airlines)

One-way from

$465
(Iberia)

Popular in

April

Cheapest in

December

Average price

$799
Provider with most accurate pricing for Ontario-Dublin flight deals.
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Provider most trusted by Cheapflights users for Ontario-Dublin flights.
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From Ontario to Dublin
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One-way flight from Ontario to Dublin
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 30, 2025.

This United Airlines deal was found by Cheapflights users on 10/30. 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 12/17:00 amONT - DUB
1 stop17h 10mUnited Airlines
Wed 12/109:00 amDUB - ONT
2 stops21h 49mUnited Airlines
Deal found 10/30$547
This United Airlines deal was found by Cheapflights users on 10/30. 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 11/57:00 amONT - DUB
1 stop17h 10mUnited Airlines
Tue 11/1112:05 pmDUB - ONT
2 stops18h 46mUnited Airlines
Deal found 10/30$553
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/296:39 pmONT - DUB
2 stops29h 31mUnited Airlines
Fri 1/910:40 amDUB - ONT
2 stops19h 18mUnited Airlines
Deal found 10/29$557
This Delta deal was found by Cheapflights users on 10/29. 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 10/297:05 amONT - DUB
2 stops26h 15mDelta
Thu 11/65:55 amDUB - ONT
2 stops24h 27mDelta
Deal found 10/29$560
This United Airlines deal was found by Cheapflights users on 10/29. 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 10/297:00 amONT - DUB
1 stop18h 10mUnited Airlines
Thu 11/612:05 pmDUB - ONT
2 stops18h 46mUnited Airlines
Deal found 10/29$577
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/77:00 amONT - DUB
1 stop17h 10mUnited Airlines
Thu 11/1312:05 pmDUB - ONT
2 stops18h 46mUnited Airlines
Deal found 10/29$602
This United Airlines deal was found by Cheapflights users on 10/30. 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 11/77:00 amONT - DUB
1 stop17h 10mUnited Airlines
Fri 11/1412:05 pmDUB - ONT
2 stops18h 46mUnited Airlines
Deal found 10/30$603
This Finnair deal was found by Cheapflights users on 10/29. 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 11/76:01 amONT - DUB
2 stops17h 09mMultiple Airlines
Thu 11/1311:30 amDUB - ONT
2 stops18h 53mMultiple Airlines
Deal found 10/29$607
This United Airlines deal was found by Cheapflights users on 10/28. 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 12/2411:59 pmONT - DUB
2 stops23h 11mUnited Airlines
Fri 1/910:40 amDUB - ONT
2 stops18h 18mUnited Airlines
Deal found 10/28$613
This Iberia deal was found by Cheapflights users on 10/29. 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.
Sat 11/87:00 amONT - DUB
1 stop16h 10mIberia
Sat 11/1512:55 pmDUB - ONT
1 stop17h 34mIberia
Deal found 10/29$652

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 October 30, 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

Mon 12/1

7:00 am-8:10 am

1 stop17h 10m

Dublin

Wed 12/10

9:00 am-10:49 pm

2 stops21h 49m

$547

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 12/29

6:39 pm-8:10 am

2 stops29h 31m

Dublin

Fri 1/9

10:40 am-9:58 pm

2 stops19h 18m

$557

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 1/7

6:00 am-7:30 am

2 stops17h 30m

Dublin

Sun 1/18

10:40 am-10:53 pm

2 stops20h 13m

$607

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 12/24

11:59 pm-7:10 am

2 stops23h 11m

Dublin

Fri 1/9

10:40 am-8:58 pm

2 stops18h 18m

$613

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 12/13

7:05 am-8:45 am

2 stops17h 40m

Dublin

Fri 1/9

10:45 am-9:07 pm

2 stops18h 22m

$657

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 12/24

11:59 pm-7:10 am

2 stops23h 11m

Dublin

Sat 1/10

9:30 am-8:58 pm

2 stops19h 28m

$663

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 4/1

5:00 am-8:15 am

2 stops19h 15m

Dublin

Sun 4/5

9:50 am-3:18 pm

2 stops37h 28m

$668

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 4/1

7:00 am-9:45 am

1 stop18h 45m

Dublin

Sun 4/5

9:50 am-8:17 pm

2 stops18h 27m

$684

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 12/1

7:05 am-7:45 am

1 stop16h 40m

Dublin

Wed 12/10

9:45 am-7:39 pm

1 stop17h 54m

$686

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 12/1

2:59 pm-3:25 pm

2 stops16h 26m

$465

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 20 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 October.
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, January is the cheapest month in which you can book a flight from Ontario to Dublin (average of $420). 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 October 30, 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.

How much does it cost to fly round-trip from Ontario to Dublin?

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 October 30, 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
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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
11,034 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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
3,004 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

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 $547, United Airlines can have you in Dublin from Ontario in 17h 10m. There are 5132 mi between Ontario and Dublin.

  • 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 34% 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, January is the cheapest month in which you can book a flight from Ontario to Dublin (average of $420). 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
Swords
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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$527Average$846FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$547Average$786FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$677Average$932FlexibilityNo cancel feeOn-time71%

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