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Ireland

$317+ Cheap flights from Ontario (ONT) to Ireland

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 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
Jul 28 — Aug 41
Tue 7/28
Tue 8/4
1 adult, Economy
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Cheap flight deals from Ontario to Ireland

Cheapest flights from Ontario to Ireland
Explore the most affordable flight options available from Ontario to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 28, 2026.

This Delta deal was found by Cheapflights users on 6/24. 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.
Thu 11/57:00 am
ONT
-
DUB
1 stop16h 45m
Delta
Wed 11/115:45 am
DUB
-
ONT
2 stops18h 27m
Delta
Deal found 6/24$703
This Air France deal was found by Cheapflights users on 6/25. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:00 pm
ONT
-
DUB
1 stop12h 45m
Air France
Tue 11/39:40 am
DUB
-
ONT
1 stop16h 38m
Air France
Deal found 6/25$706
This Air France deal was found by Cheapflights users on 6/24. 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.
Thu 11/57:00 am
ONT
-
DUB
1 stop16h 45m
Multiple Airlines
Fri 11/139:45 am
DUB
-
ONT
1 stop16h 33m
Multiple Airlines
Deal found 6/24$707
This Delta deal was found by Cheapflights users on 6/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:05 am
ONT
-
DUB
1 stop17h 40m
Delta
Tue 9/15:55 am
DUB
-
ONT
2 stops21h 58m
Delta
Deal found 6/25$708
This KLM deal was found by Cheapflights users on 6/26. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:43 am
ONT
-
DUB
2 stops14h 12m
KLM
Wed 8/1911:00 am
DUB
-
ONT
1 stop16h 53m
KLM
Deal found 6/26$715
This United Airlines deal was found by Cheapflights users on 6/27. 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.
Tue 8/187:00 am
ONT
-
DUB
1 stop18h 45m
United Airlines
Tue 9/19:50 am
DUB
-
ONT
2 stops44h 45m
United Airlines
Deal found 6/27$727
This Delta deal was found by Cheapflights users on 6/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/210:00 pm
ONT
-
DUB
2 stops28h 45m
Delta
Tue 8/1811:00 am
DUB
-
ONT
1 stop16h 53m
Delta
Deal found 6/26$733
This Trip.com deal was found by Cheapflights users on 6/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:05 am
ONT
-
DUB
1 stop17h 40m
KLM
Tue 8/2511:00 am
DUB
-
ONT
1 stop16h 53m
KLM
Deal found 6/25$736
This Delta deal was found by Cheapflights users on 6/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:05 am
ONT
-
DUB
1 stop17h 40m
Delta
Tue 9/291:25 pm
DUB
-
ONT
2 stops35h 55m
Delta
Deal found 6/25$737
This United Airlines deal was found by Cheapflights users on 6/28. 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 8/127:00 am
ONT
-
SNN
1 stop16h 30m
United Airlines
Wed 8/199:30 am
SNN
-
ONT
2 stops34h 42m
United Airlines
Deal found 6/28$772
This United Airlines deal was found by Cheapflights users on 6/24. 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 8/86:10 am
ONT
-
SNN
1 stop17h 20m
United Airlines
Sat 8/1512:30 pm
SNN
-
ONT
2 stops42h 05m
United Airlines
Deal found 6/24$970
This British Airways deal was found by Cheapflights users on 6/23. 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.
Tue 8/252:27 pm
ONT
-
SNN
2 stops17h 43m
British Airways
Tue 12/157:50 am
SNN
-
ONT
2 stops22h 10m
British Airways
Deal found 6/23$1,003

Find flight deals from Ontario to Ireland

Keep the following information in mind while searching for Ontario to Ireland flight deals. Data was last updated June 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$703
(Delta)

One-way from

$317
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$1,227
Provider with most accurate pricing for Los Angeles-Dublin flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Dublin flights.
Search Deals
From Ontario to Ireland
Search Deals
One-way flight from Ontario to Ireland
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($253 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Ireland 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 June 28, 2026.
Use the filters below to find and compare flights from Ontario to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 10/11

12:00 pm-8:45 am

1 stop12h 45m

Dublin

Sat 10/17

11:00 am-6:18 pm

1 stop15h 18m

$741

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 7/16

11:48 am-8:45 am

1 stop12h 57m

Dublin

Thu 7/23

11:00 am-9:50 pm

1 stop18h 50m

$771

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 8/12

7:00 am-7:30 am

1 stop16h 30m

Shannon

Wed 8/19

9:30 am-12:12 pm

2 stops34h 42m

$772

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 8/6

6:10 am-9:45 am

1 stop19h 35m

Dublin

Mon 8/10

11:35 am-10:51 pm

1 stop19h 16m

$839

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 11/1

5:00 am-10:20 am

3 stops21h 20m

Dublin

Sun 11/8

9:00 am-6:29 pm

2 stops17h 29m

$926

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 8/8

6:10 am-7:30 am

1 stop17h 20m

Shannon

Sat 8/15

12:30 pm-10:35 pm

2 stops42h 05m

$970

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 7/31

11:48 am-8:45 am

1 stop12h 57m

Dublin

Fri 8/7

11:00 am-6:30 pm

1 stop15h 30m

$999

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 9/20

7:00 am-9:45 am

1 stop18h 45m

Dublin

Sun 9/27

9:20 am-8:31 pm

2 stops19h 11m

$1,015

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 9/30

10:45 am-1:15 pm

2 stops18h 30m

Dublin

Wed 10/14

12:15 pm-11:53 pm

2 stops19h 38m

$1,017

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 7/9

6:10 am-10:15 am

2 stops20h 05m

Shannon

Thu 7/16

9:30 am-10:51 pm

1 stop21h 21m

$1,042

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/26

Showing 1-10 of 32 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland 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 Ireland
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Ireland

Get insights into the airlines that provide service to Ireland. 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 Ireland. Reviews last updated June 28, 2026.
Read through reviews of airlines operating flights from Ontario to Ireland, such as American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,774 reviews

Comfort

7.2

Food

6.4

Boarding

7.5

Crew

7.9

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.1
Good
11,774 reviews
American Airlines
7.1
Good
11,774 reviews

Comfort

7.2

Food

6.4

Boarding

7.5

Crew

7.9

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

Related info for your journey

Find useful and relevant information for your journey from Ontario to Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Ireland?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ireland from Ontario.

  • How long is the flight from Ontario to Ireland?

    Airlines like Delta, United Airlines, and British Airways fly from Ontario to Ireland in about 12h 57m. The time it takes to get you to your destination can typically vary by up to 6h 38m. There are 5132 mi between Ontario and Ireland. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Ontario to Ireland?

    When deciding which route to take from Ontario to Ireland consider Ontario - Dublin, Ontario - Shannon or Ontario - Cork as they are the most popular.

  • Can I find deals for flights from Ontario to Ireland that include hotel bookings?

    Yes. In addition to deals on Ontario to Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Ireland.

  • Can I find deals for business class flights from Ontario to Ireland?

    Yes. Cheapflights offers flight deals from Ontario to Ireland 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

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Alternative routes for Ontario to Ireland

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Top airline flying from Ontario to Ireland

Discover the top airline that operate flights from Ontario to Ireland. 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 June 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$728Average$1,339FlexibilityNo cancel feeOn-time71%

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