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$285+ 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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
Jun 28 — Jul 51
Sat 6/28
Sat 7/5
1 adult, Economy
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Cheap 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 23, 2025.

Round-trip from

$483
(United Airlines)

One-way from

$285
(Trip.com)

Popular in

June

Cheapest in

January

Average price

$1,048
From Ontario to Ireland
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One-way flight from Ontario to Ireland
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Highest demand for flights based on searches. 21% potential increase in price ($195 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find 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 23, 2025.

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/297:00 amONT - DUB
1 stop18h 10mUnited Airlines
Thu 11/610:40 amDUB - ONT
1 stop19h 51mUnited Airlines
Deal found 6/23$483
This Air Canada deal was found by Cheapflights users on 6/22. 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.
Tue 10/286:00 amONT - DUB
2 stops17h 10mAir Canada
Fri 11/79:00 amDUB - ONT
2 stops21h 45mAir Canada
Deal found 6/22$485
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2012:00 pmONT - DUB
1 stop12h 45mDelta
Fri 11/79:45 amDUB - ONT
1 stop33h 39mDelta
Deal found 6/22$488
This Iberia deal was found by Cheapflights users on 6/21. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/48:15 amONT - DUB
1 stop17h 30mIberia
Wed 8/2012:40 pmDUB - ONT
1 stop18h 08mIberia
Deal found 6/21$489
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/37:00 amONT - SNN
1 stop16h 30mUnited Airlines
Tue 8/129:30 amSNN - ONT
1 stop20h 41mUnited Airlines
Deal found 6/22$551
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/37:05 amONT - SNN
2 stops20h 05mDelta
Tue 8/121:05 pmSNN - ONT
2 stops29h 45mDelta
Deal found 6/22$556
This KLM deal was found by Cheapflights users on 6/22. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/117:05 amONT - DUB
1 stop17h 40mKLM
Sat 9/611:00 amDUB - ONT
1 stop16h 11mKLM
Deal found 6/22$606
This Air France deal was found by Cheapflights users on 6/22. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1311:45 amONT - DUB
1 stop13h 00mAir France
Fri 9/511:00 amDUB - ONT
1 stop16h 11mAir France
Deal found 6/22$630
This Air Canada deal was found by Cheapflights users on 6/22. 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.
Tue 10/286:09 amONT - DUB
2 stops17h 01mMultiple Airlines
Sat 11/89:00 amDUB - ONT
2 stops19h 17mMultiple Airlines
Deal found 6/22$735
This American Airlines deal was found by Cheapflights users on 6/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/3010:28 pmONT - DUB
1 stop23h 02mAmerican Airlines
Fri 8/811:45 amDUB - ONT
1 stop17h 27mAmerican Airlines
Deal found 6/21$802
This JetBlue deal was found by Cheapflights users on 6/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2411:59 pmONT - DUB
1 stop24h 21mJetBlue
Sun 7/2711:30 amDUB - ONT
1 stop18h 29mJetBlue
Deal found 6/22$922
This Ovago deal was found by Cheapflights users on 6/22. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/412:49 pmONT - DUB
2 stops20h 26mBritish Airways
Wed 7/167:00 pmDUB - ONT
2 stops35h 57mBritish Airways
Deal found 6/22$945

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 23, 2025.
Use the filters below to find and compare flights from Ontario to Ireland that are best for you.

Fly from

Ontario

Fly to

Ireland

Route

Depart

Return

Price

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

7:00 am-8:10 am

1 stop18h 10m

Dublin

Thu 11/6

10:40 am-10:31 pm

1 stop19h 51m

$483

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 10/28

6:00 am-6:10 am

2 stops17h 10m

Dublin

Fri 11/7

9:00 am-10:45 pm

2 stops21h 45m

$485

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 10/20

12:00 pm-8:45 am

1 stop12h 45m

Dublin

Fri 11/7

9:45 am-11:24 am

1 stop33h 39m

$488

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 8/4

8:15 am-9:45 am

1 stop17h 30m

Dublin

Wed 8/20

12:40 pm-10:48 pm

1 stop18h 08m

$489

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sun 8/3

7:00 am-7:30 am

1 stop16h 30m

Shannon

Tue 8/12

9:30 am-10:11 pm

1 stop20h 41m

$551

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sun 8/3

7:05 am-11:10 am

2 stops20h 05m

Shannon

Tue 8/12

1:05 pm-10:50 am

2 stops29h 45m

$556

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 8/11

7:05 am-8:45 am

1 stop17h 40m

Dublin

Sat 9/6

11:00 am-7:11 pm

1 stop16h 11m

$606

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 8/13

11:45 am-8:45 am

1 stop13h 00m

Dublin

Fri 9/5

11:00 am-7:11 pm

1 stop16h 11m

$630

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 10/28

6:09 am-6:10 am

2 stops17h 01m

Dublin

Sat 11/8

9:00 am-8:17 pm

2 stops19h 17m

$735

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 7/30

10:28 pm-5:30 am

1 stop23h 02m

Dublin

Fri 8/8

11:45 am-9:12 pm

1 stop17h 27m

$802

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

Showing 1-10 of 29 results
1
2
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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

What is the cheapest month to book a flight from Ontario to Ireland?

Currently, November is the cheapest month in which you can book a flight from Ontario to Ireland (average of $509). Flying from Ontario to Ireland in June is currently the most expensive (average of $937). 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 IE?

Find hourly flight availability from Ontario to Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 23, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Ireland as you normally would.

Rainfall in Ireland by month

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

In terms of precipitation, rainfall in Ireland 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 Ireland when rainfall is around 1.9 in.

Temperature in Ireland by month

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

If weather is an important factor for your trip to Ireland, 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 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 23, 2025.
See what other customers who have flown with Delta, KLM and Air France from Ontario to Ireland have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

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
7,966 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

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
1,365 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

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
1,470 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

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
8,831 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

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.
JetBlue
7.3
Good
2,922 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

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 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.

  • What are the cheapest airlines to fly from Ontario to Ireland one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $399. However, be on the lookout for offers from Air Canada and KLM, as they are both options that can get you from Ontario to Ireland for a low price.

  • 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.

  • What is the cheapest month to book a flight from Ontario to Ireland?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Ireland (average of $509). Flying from Ontario to Ireland in June is currently the most expensive (average of $937). 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

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Alternative routes for Ontario to Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Ontario to Ireland

Discover the top 4 airlines 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 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$527Average$851FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$596Average$966FlexibilityNo cancel feeOn-time71%
KLMCheapest$607Average$864FlexibilityNo cancel feeOn-time75%
IberiaCheapest$718Average$885FlexibilityNo cancel feeOn-time77%

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