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$373+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$454
(Ticket)

One-way from

$373
(Priceline)

Popular in

April

Cheapest in

December

Average price

$976
From Ontario to Dublin
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One-way flight from Ontario to Dublin
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Highest demand for flights based on searches. 0% potential increase in price ($1 potential increase over avg. RT price).
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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 September 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 September 15, 2025.

This Ticket deal was found by Cheapflights users on 9/13. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2011:36 amONT - DUB
1 stop13h 09mKLM
Wed 11/59:45 amDUB - ONT
1 stop17h 34mKLM
Deal found 9/13$454
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 11/107:00 amONT - DUB
1 stop17h 10mUnited Airlines
Fri 11/219:00 amDUB - ONT
2 stops21h 31mUnited Airlines
Deal found 9/15$478
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sun 11/97:00 amONT - DUB
1 stop17h 10mUnited Airlines
Wed 11/1912:05 pmDUB - ONT
2 stops18h 46mUnited Airlines
Deal found 9/15$483
This Air Canada deal was found by Cheapflights users on 9/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:00 amONT - DUB
2 stops16h 10mMultiple Airlines
Wed 11/199:00 amDUB - ONT
2 stops21h 31mMultiple Airlines
Deal found 9/15$485
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/297:00 amONT - DUB
2 stops19h 55mUnited Airlines
Thu 11/610:40 amDUB - ONT
1 stop19h 51mUnited Airlines
Deal found 9/15$488
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2712:48 pmONT - DUB
2 stops16h 47mAmerican Airlines
Mon 11/312:55 pmDUB - ONT
1 stop30h 41mAmerican Airlines
Deal found 9/15$524
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 11/147:00 amONT - DUB
1 stop17h 10mUnited Airlines
Tue 11/1810:40 amDUB - ONT
1 stop15h 56mUnited Airlines
Deal found 9/15$533
This Air Canada deal was found by Cheapflights users on 9/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:00 amONT - DUB
2 stops16h 10mMultiple Airlines
Mon 11/179:00 amDUB - ONT
2 stops17h 36mMultiple Airlines
Deal found 9/15$535
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/307:00 amONT - DUB
2 stops17h 30mUnited Airlines
Thu 11/610:40 amDUB - ONT
1 stop19h 51mUnited Airlines
Deal found 9/15$538

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 September 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

Mon 10/20

11:36 am-8:45 am

1 stop13h 09m

Dublin

Wed 11/5

9:45 am-7:19 pm

1 stop17h 34m

$476

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 11/10

7:00 am-8:10 am

1 stop17h 10m

Dublin

Wed 11/19

9:00 am-10:31 pm

2 stops21h 31m

$478

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 11/12

7:00 am-8:10 am

1 stop17h 10m

Dublin

Fri 11/21

9:00 am-10:31 pm

2 stops21h 31m

$478

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

7:00 am-8:10 am

1 stop18h 10m

Dublin

Thu 11/6

10:40 am-10:31 pm

1 stop19h 51m

$483

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 11/11

7:00 am-8:10 am

1 stop17h 10m

Dublin

Thu 11/20

12:05 pm-10:51 pm

2 stops18h 46m

$483

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 11/9

7:00 am-8:10 am

1 stop17h 10m

Dublin

Thu 11/20

10:40 am-10:31 pm

1 stop19h 51m

$483

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 11/9

7:00 am-8:10 am

1 stop17h 10m

Dublin

Fri 11/21

10:40 am-10:31 pm

1 stop19h 51m

$483

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 11/12

7:00 am-8:10 am

1 stop17h 10m

Dublin

Thu 11/20

12:05 pm-10:51 pm

2 stops18h 46m

$483

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 11/11

7:00 am-8:10 am

1 stop17h 10m

Dublin

Tue 11/18

12:05 pm-10:51 pm

2 stops18h 46m

$483

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 11/8

6:38 pm-8:10 am

2 stops29h 32m

Dublin

Thu 11/20

10:40 am-10:51 pm

2 stops20h 11m

$488

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 20 results
1
2

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 $509). Flying from Ontario to Dublin in June is currently the most expensive (average of $923). 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 September 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 morning tend to be the most expensive. A flight at noon could potentially save you up to 6% 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 September 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
8.0
Very good
7,954 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

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
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

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
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

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
2,924 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

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 $476, KLM can have you in Dublin from Ontario in 13h 09m. 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 $623. 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, November is the cheapest month in which you can book a flight from Ontario to Dublin (average of $509). Flying from Ontario to Dublin in June is currently the most expensive (average of $923). 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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Alternative routes for Ontario to Dublin

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$527Average$846FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$547Average$786FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$623Average$975FlexibilityNo cancel feeOn-time71%

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