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$505+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
May 23 — May 301
Sat 5/23
Sat 5/30
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 April 23, 2026.

This United Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 9/17:00 am
ONT
-
DUB
1 stop18h 45m
United Airlines
Tue 9/89:20 am
DUB
-
ONT
2 stops40h 59m
United Airlines
Deal found 4/21$848
This Air Canada deal was found by Cheapflights users on 4/21. 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 9/11:44 pm
ONT
-
DUB
2 stops34h 31m
Air Canada
Tue 9/89:20 am
DUB
-
ONT
2 stops35h 18m
Air Canada
Deal found 4/21$856
This Air Canada deal was found by Cheapflights users on 4/21. 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 9/17:00 am
ONT
-
DUB
2 stops17h 15m
Multiple Airlines
Tue 9/89:20 am
DUB
-
ONT
3 stops35h 18m
Multiple Airlines
Deal found 4/21$865
This Priceline deal was found by Cheapflights users on 4/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/711:50 pm
ONT
-
DUB
1 stop25h 10m
JetBlue
Thu 9/1711:30 am
DUB
-
ONT
1 stop16h 43m
JetBlue
Deal found 4/21$869
This KLM deal was found by Cheapflights users on 4/21. 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.
Sun 11/17:00 am
ONT
-
DUB
1 stop16h 45m
KLM
Tue 11/109:40 am
DUB
-
ONT
1 stop16h 38m
KLM
Deal found 4/21$875
This United Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 5/57:00 am
ONT
-
DUB
1 stop18h 45m
United Airlines
Wed 5/139:20 am
DUB
-
ONT
2 stops21h 15m
United Airlines
Deal found 4/21$876
This Delta deal was found by Cheapflights users on 4/21. 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.
Tue 5/57:05 am
ONT
-
DUB
1 stop17h 40m
Delta
Wed 5/1311:00 am
DUB
-
ONT
1 stop15h 36m
Delta
Deal found 4/21$880
This United Airlines deal was found by Cheapflights users on 4/19. 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 5/310:37 am
ONT
-
DUB
2 stops16h 33m
United Airlines
Wed 5/139:20 am
DUB
-
ONT
2 stops21h 15m
United Airlines
Deal found 4/19$881
This United Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 5/57:00 am
ONT
-
DUB
1 stop18h 45m
United Airlines
Tue 5/1212:30 pm
DUB
-
ONT
2 stops18h 05m
United Airlines
Deal found 4/21$884
This Delta deal was found by Cheapflights users on 4/19. 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.
Sun 5/310:15 pm
ONT
-
DUB
2 stops27h 00m
Delta
Tue 5/1211:00 am
DUB
-
ONT
1 stop15h 36m
Delta
Deal found 4/19$885
This Air Canada deal was found by Cheapflights users on 4/22. 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 5/85:00 am
ONT
-
DUB
2 stops18h 45m
Air Canada
Tue 5/129:50 am
DUB
-
ONT
2 stops42h 46m
Air Canada
Deal found 4/22$886
This Cheapflightsfares deal was found by Cheapflights users on 4/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:50 pm
ONT
-
DUB
1 stop25h 10m
JetBlue
Tue 9/111:30 am
DUB
-
ONT
1 stop19h 05m
JetBlue
Deal found 4/20$903

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 April 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$848
(United Airlines)

One-way from

$505
(Priceline)

Popular in

June

Cheapest in

February

Average price

$727
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. 21% potential increase in price ($205 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 23, 2026.
Use the filters below to find and compare flights from Ontario to Dublin that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 9/1

7:00 am-9:45 am

1 stop18h 45m

Dublin

Tue 9/8

9:20 am-6:19 pm

2 stops40h 59m

$848

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 5/6

7:00 am-9:45 am

1 stop18h 45m

Dublin

Mon 5/11

11:35 am-10:35 pm

1 stop19h 00m

$913

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 8/18

9:01 am-9:45 am

2 stops16h 44m

Dublin

Tue 9/1

9:50 am-6:19 pm

2 stops40h 29m

$933

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 8/14

7:00 am-9:45 am

1 stop18h 45m

Dublin

Tue 8/25

9:50 am-8:52 pm

2 stops43h 02m

$988

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 6/1

10:41 pm-9:00 am

1 stop26h 19m

Dublin

Mon 6/15

11:30 am-10:39 pm

1 stop19h 09m

$1,043
Quickest round-trip

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 8/14

7:00 am-7:45 am

2 stops16h 45m

Dublin

Sat 8/22

9:50 am-6:19 pm

2 stops16h 29m

$1,048

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 5/6

12:19 pm-2:35 pm

2 stops18h 16m

Dublin

Mon 5/11

12:50 pm-9:59 pm

2 stops17h 09m

$1,146

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 9/4

7:57 pm-4:00 pm

2 stops36h 03m

Dublin

Sun 9/13

5:45 am-2:18 pm

2 stops40h 33m

$1,172

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 6/7

6:30 am-9:45 am

1 stop19h 15m

Dublin

Sun 6/14

8:50 am-5:28 pm

2 stops16h 38m

$1,245

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 5/27

10:41 pm-9:35 am

2 stops26h 54m

Dublin

Tue 6/9

10:40 am-8:47 pm

2 stops42h 07m

$1,341

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/18

Showing 1-10 of 22 resultsSorted by cheapest first
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 April.
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.

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 23, 2026.
Peruse reviews from past customers who have flown with 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.
American Airlines
7.1
Good
11,659 reviews

Boarding

7.5

Entertainment

6.9

Crew

7.9

Comfort

7.2

Overall

7.1

Food

6.4

Reviews

1 / 20
4.0
Okay

Elizabeth,Mar 2026

ORD - MIA

Staff was rude and flight attendants 2 out of 3 looked like they had just been thru a hurricane.
American Airlines
7.1
Good
11,659 reviews
American Airlines
7.1
Good
11,659 reviews

Boarding

7.5

Entertainment

6.9

Crew

7.9

Comfort

7.2

Overall

7.1

Food

6.4

Reviews

1 / 20
4.0
Okay

Elizabeth,Mar 2026

ORD - MIA

Staff was rude and flight attendants 2 out of 3 looked like they had just been thru a hurricane.

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 $848, United Airlines can have you in Dublin from Ontario in 18h 45m. There are 5132 mi between Ontario and Dublin.

  • What is the cheapest airline to fly from Ontario to Dublin round-trip?

    Cheapflights users have booked flights from Ontario to Dublin round-trip from $683.

  • 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.

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 airline flying from Ontario to Dublin

Discover the top airline 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 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$683Average$975FlexibilityNo cancel feeOn-time71%

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