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$398+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
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 julio 31, 2025.

Round-trip from

$455
(United Airlines)

One-way from

$398
(Kiwi.com)

Popular in

April

Cheapest in

December

Average price

$892
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. 3% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 31, 2025.

This United Airlines deal was found by Cheapflights users on 7/31. 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.
mar. 11/187:00 amONT - DUB
1 stop17h 10mUnited Airlines
mié. 11/269:00 amDUB - ONT
2 stops35h 32mUnited Airlines
Deal found 7/31$455
This Iberia deal was found by Cheapflights users on 7/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/2212:53 pmONT - DUB
1 stop34h 17mIberia
vie. 12/512:55 pmDUB - ONT
1 stop17h 03mIberia
Deal found 7/30$473
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/1012:47 pmONT - DUB
1 stop12h 58mAmerican Airlines
mar. 8/2612:40 pmDUB - ONT
1 stop13h 44mAmerican Airlines
Deal found 7/30$474
This Air Canada deal was found by Cheapflights users on 7/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/235:05 amONT - DUB
2 stops18h 05mAir Canada
vie. 12/59:00 amDUB - ONT
2 stops19h 42mAir Canada
Deal found 7/30$475
This Finnair deal was found by Cheapflights users on 7/30. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/267:00 amONT - DUB
1 stop16h 15mMultiple Airlines
vie. 12/512:55 pmDUB - ONT
1 stop17h 03mMultiple Airlines
Deal found 7/30$482
This Delta deal was found by Cheapflights users on 7/31. 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.
mar. 11/1810:59 pmONT - DUB
2 stops25h 46mDelta
mar. 11/259:45 amDUB - ONT
2 stops20h 57mDelta
Deal found 7/31$488
This British Airways deal was found by Cheapflights users on 7/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/122:57 pmONT - DUB
2 stops18h 08mBritish Airways
mar. 8/198:35 amDUB - ONT
2 stops17h 49mBritish Airways
Deal found 7/30$502
This KLM deal was found by Cheapflights users on 7/31. 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.
jue. 10/2311:36 amONT - DUB
1 stop13h 09mKLM
vie. 10/319:45 amDUB - ONT
1 stop16h 34mKLM
Deal found 7/31$598

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 julio 31, 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

mar. 11/18

7:00 am-8:10 am

1 stop17h 10m

Dublin

mié. 11/26

9:00 am-12:32 pm

2 stops35h 32m

$455

OntarioDublin

ONT - DUB

ONTDUB

Ontario

sáb. 11/22

12:53 pm-7:10 am

1 stop34h 17m

Dublin

vie. 12/5

12:55 pm-9:58 pm

1 stop17h 03m

$473

OntarioDublin

ONT - DUB

ONTDUB

Ontario

dom. 8/10

12:47 pm-9:45 am

1 stop12h 58m

Dublin

mar. 8/26

12:40 pm-6:24 pm

1 stop13h 44m

$474

OntarioDublin

ONT - DUB

ONTDUB

Ontario

dom. 11/23

5:05 am-7:10 am

2 stops18h 05m

Dublin

vie. 12/5

9:00 am-8:42 pm

2 stops19h 42m

$475

OntarioDublin

ONT - DUB

ONTDUB

Ontario

mié. 11/26

7:00 am-7:15 am

1 stop16h 15m

Dublin

vie. 12/5

12:55 pm-9:58 pm

1 stop17h 03m

$482

OntarioDublin

ONT - DUB

ONTDUB

Ontario

mar. 11/18

10:59 pm-8:45 am

2 stops25h 46m

Dublin

mar. 11/25

9:45 am-10:42 pm

2 stops20h 57m

$488

OntarioDublin

ONT - DUB

ONTDUB

Ontario

mar. 8/12

2:57 pm-5:05 pm

2 stops18h 08m

Dublin

mar. 8/19

8:35 am-6:24 pm

2 stops17h 49m

$502

OntarioDublin

ONT - DUB

ONTDUB

Ontario

jue. 10/23

11:36 am-8:45 am

1 stop13h 09m

Dublin

vie. 10/31

9:45 am-7:19 pm

1 stop16h 34m

$598

OntarioDublin

ONT - DUB

ONTDUB

Ontario

lun. 8/18

12:59 am-8:15 am

3 stops47h 16m

$398

OntarioDublin

ONT - DUB

ONTDUB

Ontario

lun. 10/27

7:00 am-8:10 am

1 stop18h 10m

$399

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 16 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 $924). 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 julio 31, 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 julio 31, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and United Airlines 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
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

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
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

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.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

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.
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

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.
JetBlue
7.3
Good
2,914 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

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
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

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.

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

    Cheapflights users have booked flights from Ontario to Dublin round-trip from $455. Other airlines that can offer you cheap pricing are Iberia, from $473, and American Airlines, from $474. Users have found that United Airlines is 41% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Ontario to Dublin one-way?

    One-way options have recently been found by users for as low as $399 on United Airlines. Other airlines that offer cheap prices include Air Canada from $401 and JetBlue from $408 one-way.

  • 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 $924). 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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$527Average$823FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$547Average$786FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$596Average$956FlexibilityNo cancel feeOn-time71%

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