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Ireland

$417+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
Jul 5 — Jul 121
Sun 7/5
Sun 7/12
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 5, 2026.

This United Airlines deal was found by Cheapflights users on 6/2. 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 9/19:01 am
ONT
-
SNN
2 stops17h 14m
United Airlines
Fri 9/189:30 am
SNN
-
ONT
2 stops18h 31m
United Airlines
Deal found 6/2$764
This United Airlines deal was found by Cheapflights users on 6/4. 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 6/4$848
This Air Canada deal was found by Cheapflights users on 6/4. 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 8/175:00 am
ONT
-
DUB
2 stops18h 45m
Air Canada
Wed 8/269:50 am
DUB
-
ONT
2 stops18h 11m
Air Canada
Deal found 6/4$871
This Air France deal was found by Cheapflights users on 6/4. 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.
Sun 10/257:00 am
ONT
-
DUB
1 stop17h 45m
Multiple Airlines
Thu 11/59:40 am
DUB
-
ONT
1 stop16h 38m
Multiple Airlines
Deal found 6/4$875
This Air Canada deal was found by Cheapflights users on 6/2. 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 9/19:01 am
ONT
-
DUB
2 stops15h 14m
Multiple Airlines
Wed 9/99:50 am
DUB
-
ONT
2 stops16h 26m
Multiple Airlines
Deal found 6/2$876
This Icelandair deal was found by Cheapflights users on 5/31. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:00 am
ONT
-
DUB
2 stops20h 15m
Multiple Airlines
Wed 12/1611:30 am
DUB
-
ONT
2 stops19h 09m
Multiple Airlines
Deal found 5/31$895
This United Airlines deal was found by Cheapflights users on 5/31. 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.
Wed 7/156:10 am
ONT
-
SNN
1 stop17h 20m
United Airlines
Wed 7/229:30 am
SNN
-
ONT
1 stop21h 21m
United Airlines
Deal found 5/31$897
This KAYAK deal was found by Cheapflights users on 6/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1811:18 pm
ONT
-
DUB
1 stop25h 42m
JetBlue
Tue 9/811:30 am
DUB
-
ONT
1 stop19h 05m
JetBlue
Deal found 6/5$897
This KAYAK deal was found by Cheapflights users on 6/3. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2310:47 am
ONT
-
DUB
2 stops18h 28m
Multiple Airlines
Tue 9/292:15 pm
DUB
-
ONT
2 stops29h 01m
Multiple Airlines
Deal found 6/3$901
This Air Canada deal was found by Cheapflights users on 6/3. 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 12/76:00 am
ONT
-
DUB
2 stops41h 10m
Air Canada
Sun 12/139:00 am
DUB
-
ONT
2 stops46h 06m
Air Canada
Deal found 6/3$906
This KLM deal was found by Cheapflights users on 6/2. 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 9/3011:59 am
ONT
-
DUB
1 stop12h 46m
Multiple Airlines
Sat 10/1711:00 am
DUB
-
ONT
1 stop15h 18m
Multiple Airlines
Deal found 6/2$910
This KLM deal was found by Cheapflights users on 6/2. 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.
Tue 11/37:00 am
ONT
-
DUB
1 stop16h 45m
KLM
Tue 11/109:40 am
DUB
-
ONT
1 stop16h 38m
KLM
Deal found 6/2$915

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 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$764
(United Airlines)

One-way from

$417
(Ovago)

Popular in

June

Cheapest in

February

Average price

$1,184
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. 23% potential increase in price ($237 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($38 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 5, 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

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 11/3

7:00 am-7:45 am

1 stop16h 45m

Dublin

Tue 11/10

9:40 am-6:18 pm

1 stop16h 38m

$875

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 7/15

6:10 am-7:30 am

1 stop17h 20m

Shannon

Wed 7/22

9:30 am-10:51 pm

1 stop21h 21m

$897

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sun 11/8

10:37 am-4:45 pm

2 stops22h 08m

Shannon

Thu 11/12

7:50 am-10:23 pm

2 stops22h 33m

$951

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 9/9

7:00 am-9:45 am

1 stop18h 45m

Dublin

Tue 10/6

9:50 am-9:58 pm

2 stops20h 08m

$956

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 8/1

10:54 am-11:05 am

2 stops16h 11m

Dublin

Wed 8/5

12:15 pm-11:11 pm

2 stops18h 56m

$975

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 7/9

5:45 am-10:15 am

2 stops20h 30m

Shannon

Thu 7/16

12:30 pm-10:51 pm

2 stops18h 21m

$1,002

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 11/2

6:00 am-10:15 am

2 stops20h 15m

Dublin

Mon 11/9

11:30 am-10:54 pm

2 stops19h 24m

$1,010

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 7/4

6:10 am-7:45 am

3 stops41h 35m

Dublin

Tue 7/21

9:50 am-10:51 pm

2 stops45h 01m

$1,011

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 9/3

9:01 am-10:15 am

2 stops17h 14m

Shannon

Mon 9/7

9:30 am-8:53 pm

2 stops19h 23m

$1,023

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 7/20

11:51 pm-9:00 am

1 stop25h 09m

Dublin

Wed 8/5

11:30 am-10:35 pm

1 stop19h 05m

$1,062

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/5

Showing 1-10 of 44 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 5, 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
11,645 reviews

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Food

6.4

Overall

7.1

Crew

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!
American Airlines
7.1
Good
11,645 reviews
American Airlines
7.1
Good
11,645 reviews

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Food

6.4

Overall

7.1

Crew

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!

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 KLM, British Airways, and United Airlines fly from Ontario to Ireland in about 16h 45m. The time it takes to get you to your destination can typically vary by up to 5h 23m. 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 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$683Average$879FlexibilityNo cancel feeOn-time71%

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