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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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
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 January 28, 2026.

This Air Canada deal was found by Cheapflights users on 1/27. 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.
Mon 8/171:33 pm
ONT
-
DUB
2 stops34h 12m
Air Canada
Fri 9/119:20 am
DUB
-
ONT
2 stops40h 27m
Air Canada
Deal found 1/27$623
This United Airlines deal was found by Cheapflights users on 1/27. 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 8/177:00 am
ONT
-
DUB
1 stop18h 45m
United Airlines
Tue 9/89:20 am
DUB
-
ONT
2 stops35h 13m
United Airlines
Deal found 1/27$626
This Air Canada deal was found by Cheapflights users on 1/27. 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.
Sat 8/156:30 pm
ONT
-
DUB
2 stops29h 15m
Air Canada
Tue 9/89:20 am
DUB
-
ONT
2 stops35h 13m
Air Canada
Deal found 1/27$630
This United Airlines deal was found by Cheapflights users on 1/27. 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 8/177:00 am
ONT
-
DUB
1 stop18h 45m
United Airlines
Fri 9/119:50 am
DUB
-
ONT
2 stops39h 28m
United Airlines
Deal found 1/27$631
This United Airlines deal was found by Cheapflights users on 1/25. 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 3/2211:59 pm
ONT
-
DUB
2 stops24h 31m
United Airlines
Tue 4/289:50 am
DUB
-
ONT
2 stops34h 48m
United Airlines
Deal found 1/25$635
This oojo deal was found by Cheapflights users on 1/26. 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.
Tue 2/242:39 pm
ONT
-
DUB
2 stops18h 21m
British Airways
Tue 3/36:00 pm
DUB
-
ONT
2 stops33h 45m
British Airways
Deal found 1/26$637
This United Airlines deal was found by Cheapflights users on 1/25. 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.
Sat 3/2811:59 pm
ONT
-
DUB
1 stop25h 46m
United Airlines
Fri 5/19:20 am
DUB
-
ONT
2 stops35h 02m
United Airlines
Deal found 1/25$638
This Air Canada deal was found by Cheapflights users on 1/25. 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.
Sun 2/225:00 am
ONT
-
DUB
2 stops18h 10m
Air Canada
Thu 4/169:50 am
DUB
-
ONT
2 stops44h 55m
Air Canada
Deal found 1/25$639
This Air Canada deal was found by Cheapflights users on 1/27. 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.
Fri 8/146:30 pm
ONT
-
DUB
2 stops53h 45m
Air Canada
Tue 9/89:20 am
DUB
-
ONT
2 stops39h 58m
Air Canada
Deal found 1/27$641
This oojo deal was found by Cheapflights users on 1/27. 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.
Tue 4/287:30 am
ONT
-
DUB
2 stops18h 10m
British Airways
Wed 5/68:30 pm
DUB
-
ONT
2 stops32h 36m
British Airways
Deal found 1/27$642
This Gotogate deal was found by Cheapflights users on 1/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/241:43 pm
ONT
-
DUB
2 stops58h 32m
Air Canada
Tue 5/129:50 am
DUB
-
ONT
2 stops40h 02m
Air Canada
Deal found 1/27$646
This United Airlines deal was found by Cheapflights users on 1/27. 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 8/177:00 am
ONT
-
DUB
1 stop18h 45m
United Airlines
Wed 9/99:50 am
DUB
-
ONT
2 stops18h 27m
United Airlines
Deal found 1/27$655

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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$635
(United Airlines)

One-way from

$457
(oojo)

Popular in

January

Cheapest in

November

Average price

$1,123
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. 8% potential increase in price ($83 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 28, 2026.
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

Sat 3/28

11:59 pm-9:45 am

1 stop25h 46m

Dublin

Tue 4/28

9:50 am-12:14 pm

2 stops34h 24m

$638

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 4/28

7:30 am-9:40 am

2 stops18h 10m

Dublin

Wed 5/6

8:30 pm-9:06 pm

2 stops32h 36m

$642

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 3/18

6:00 am-7:30 am

2 stops18h 30m

Dublin

Wed 3/25

10:40 am-10:18 pm

1 stop18h 38m

$658

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 4/26

7:00 am-9:45 am

1 stop18h 45m

Dublin

Thu 5/7

11:35 am-10:30 pm

1 stop18h 55m

$658

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 3/24

10:25 pm-8:45 am

2 stops27h 20m

Dublin

Thu 4/30

11:10 am-10:37 pm

2 stops19h 27m

$659

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 2/23

10:20 pm-8:45 am

2 stops26h 25m

Dublin

Tue 4/14

1:25 pm-11:44 pm

2 stops42h 19m

$659

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 2/24

6:00 am-7:45 am

2 stops17h 45m

Dublin

Wed 4/15

5:55 am-11:44 pm

2 stops25h 49m

$659

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 3/28

11:59 pm-10:40 am

2 stops26h 41m

Dublin

Wed 4/29

9:50 am-8:36 pm

2 stops18h 46m

$659

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 3/22

10:25 pm-8:45 am

2 stops27h 20m

Dublin

Fri 5/1

8:55 am-10:37 pm

2 stops21h 42m

$659

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 3/22

10:25 pm-8:45 am

2 stops27h 20m

Dublin

Mon 4/27

11:10 am-5:15 pm

2 stops38h 05m

$659

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 24 results
1
2
3

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Dublin flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 $454). 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.

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 January 28, 2026.
Peruse reviews from past customers who have flown with Delta and American 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
7.9
Good
8,123 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Crew

8.5

Overall

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
7.9
Good
8,123 reviews
Delta
7.9
Good
8,123 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Crew

8.5

Overall

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
11,201 reviews
Delta
7.9
Good
8,123 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Crew

8.5

Overall

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 $642, United Airlines can have you in Dublin from Ontario in 18h 10m. 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. Another airline that can offer you cheap pricing is American Airlines. Users have found that Delta is 39% 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 $454). 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
Leixlip

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Top 2 airlines flying from Ontario to Dublin

Discover the top 2 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 January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$527Average$846FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$683Average$890FlexibilityNo cancel feeOn-time71%

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