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$399+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
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 April 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$575
(United Airlines)

One-way from

$399
(KLM)

Popular in

July

Cheapest in

November

Average price

$977
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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Highest demand for flights based on searches. 17% potential increase in price ($168 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 15, 2025.

This Finnair deal was found by Cheapflights users on 4/15. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/318:44 amONT - DUB
1 stop15h 31mMultiple Airlines
Thu 11/62:05 pmDUB - ONT
1 stop15h 55mMultiple Airlines
Deal found 4/15$513
This Delta deal was found by Cheapflights users on 4/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3112:00 pmONT - DUB
1 stop12h 45mDelta
Wed 11/59:45 amDUB - ONT
1 stop17h 57mDelta
Deal found 4/15$522
This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:08 amONT - DUB
2 stops17h 12mUnited Airlines
Thu 5/159:50 amDUB - ONT
2 stops43h 03mUnited Airlines
Deal found 4/14$575
This Iberia deal was found by Cheapflights users on 4/15. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1512:51 pmONT - DUB
1 stop12h 54mIberia
Sun 11/22:05 pmDUB - ONT
1 stop15h 55mIberia
Deal found 4/15$586
This KLM deal was found by Cheapflights users on 4/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/710:01 amONT - DUB
2 stops13h 54mKLM
Thu 5/1511:00 amDUB - ONT
1 stop19h 29mKLM
Deal found 4/14$606
This Justfly.com deal was found by Cheapflights users on 4/15. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/106:00 amONT - DUB
2 stops17h 45mAir Canada
Thu 7/249:20 amDUB - ONT
2 stops40h 05mAir Canada
Deal found 4/15$756
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Thu 5/112:50 pmONT - DUB
1 stop12h 55mAmerican Airlines
Mon 5/512:40 pmDUB - ONT
1 stop13h 56mAmerican Airlines
Deal found 4/15$758
This Gurufare deal was found by Cheapflights users on 4/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/176:15 amONT - DUB
2 stops28h 55mBritish Airways
Sat 5/248:35 amDUB - ONT
2 stops41h 48mBritish Airways
Deal found 4/15$1,033
This Air France deal was found by Cheapflights users on 4/15. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1311:49 amONT - DUB
1 stop12h 56mAir France
Sat 6/2811:00 amDUB - ONT
1 stop16h 54mAir France
Deal found 4/15$1,131

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 April 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

Wed 5/7

6:08 am-7:20 am

2 stops17h 12m

Dublin

Thu 5/15

9:50 am-8:53 pm

2 stops43h 03m

$575

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 5/7

10:01 am-7:55 am

2 stops13h 54m

Dublin

Thu 5/15

11:00 am-10:29 pm

1 stop19h 29m

$606

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 4/29

10:54 am-11:55 am

2 stops17h 01m

Dublin

Tue 5/6

12:40 pm-9:58 pm

1 stop17h 18m

$643

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 4/29

7:00 am-9:45 am

1 stop18h 45m

Dublin

Tue 5/6

12:40 pm-9:58 pm

1 stop17h 18m

$645

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 6/16

11:49 am-8:45 am

1 stop12h 56m

Dublin

Tue 6/24

11:00 am-7:54 pm

1 stop16h 54m

$717

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 7/10

6:00 am-7:45 am

2 stops17h 45m

Dublin

Thu 7/24

9:20 am-5:25 pm

2 stops40h 05m

$756

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 5/1

12:50 pm-9:45 am

1 stop12h 55m

Dublin

Mon 5/5

12:40 pm-6:36 pm

1 stop13h 56m

$758

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 5/17

6:15 am-7:10 pm

2 stops28h 55m

Dublin

Sat 5/24

8:35 am-6:23 pm

2 stops41h 48m

$1,033

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 6/13

11:49 am-8:45 am

1 stop12h 56m

Dublin

Sat 6/28

11:00 am-7:54 pm

1 stop16h 54m

$1,131

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 10/7

12:00 pm-8:45 am

1 stop12h 45m

$399

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 18 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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*2 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ontario-Dublin flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 $509). Flying from Ontario to Dublin in June is currently the most expensive (average of $1,006). 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 April 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.

Rainfall in Dublin by month

Plan your trip to Dublin by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Dublin ranges from 1.9 - 3.1 inches per month. October is typically the wettest month, when rainfall can reach 3.1 in. February is typically the driest time to visit Dublin when rainfall is around 1.9 in.

Temperature in Dublin by month

Plan your trip to Dublin by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Dublin, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

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 April 15, 2025.
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

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
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

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.
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

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.
Air France
7.5
Good
1,435 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

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.
United Airlines
7.4
Good
8,658 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

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
7,917 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

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.

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

    Cheapflights users have booked flights from Ontario to Dublin round-trip from $575. Other airlines that can offer you cheap pricing are KLM, from $606, and Iberia, from $645. Users have found that United Airlines is 25% 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 KLM. Other airlines that offer cheap prices include Air Canada from $406 and United Airlines from $449 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 $1,006). 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 Ontario?

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

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Top 5 airlines flying from Ontario to Dublin

Discover the top 5 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$507Average$572FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$557Average$934FlexibilityNo cancel feeOn-time71%
IberiaCheapest$580Average$808FlexibilityNo cancel feeOn-time77%
KLMCheapest$607Average$893FlexibilityNo cancel feeOn-time75%
DeltaCheapest$677Average$861FlexibilityNo cancel feeOn-timeN/A

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