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Ontario

$585+ Cheap flights from Ireland to Ontario (ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Feb 26 — Mar 51
Wed 2/26
Wed 3/5
1 adult, Economy
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Cheap flight deals from Ireland to Ontario

Keep the following information in mind while searching for Ireland to Ontario flight deals. Data was last updated February 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$585
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$529
Provider with most accurate pricing for Dublin-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Dublin-Los Angeles flights.
Search Deals
From Ireland to Ontario
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($151 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
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Find flight deals from Ireland to Ontario

Cheapest flights from Ireland to Ontario
Explore the most affordable flight options available from Ireland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 21, 2025.

This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/112:40 pmDUB - ONT
2 stops17h 18mAmerican Airlines
Thu 5/82:44 pmONT - DUB
1 stop35h 01mAmerican Airlines
Deal found 2/20$585
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/111:35 amDUB - ONT
2 stops17h 18mUnited Airlines
Mon 5/125:05 amONT - DUB
2 stops22h 05mUnited Airlines
Deal found 2/20$668
This KLM deal was found by Cheapflights users on 2/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/2012:00 pmDUB - ONT
1 stop17h 43mKLM
Thu 3/2712:46 pmONT - DUB
1 stop13h 59mKLM
Deal found 2/20$680
This Iberia deal was found by Cheapflights users on 2/20. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/112:40 pmDUB - ONT
1 stop17h 30mIberia
Mon 5/1212:46 pmONT - DUB
1 stop12h 59mIberia
Deal found 2/20$692
This Kissandfly.com deal was found by Cheapflights users on 2/20. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/177:30 amDUB - ONT
2 stops18h 50mBritish Airways
Mon 4/212:44 pmONT - DUB
2 stops18h 31mBritish Airways
Deal found 2/20$706
This Iberia deal was found by Cheapflights users on 2/20. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1712:40 pmDUB - ONT
1 stop19h 10mMultiple Airlines
Mon 4/217:00 amONT - DUB
2 stops18h 40mMultiple Airlines
Deal found 2/20$721

Find flights from Ireland to Ontario within your budget

Customize your flight search to find flights from Ireland to Ontario 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 February 21, 2025.

Fly from

Ireland

Fly to

Ontario

Route

Depart

Return

Price

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 5/1

12:40 pm-9:58 pm

2 stops17h 18m

Ontario

Sun 5/11

11:59 pm-9:45 am

1 stop25h 46m

$585

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 5/1

11:35 am-8:53 pm

2 stops17h 18m

Ontario

Mon 5/12

5:05 am-11:10 am

2 stops22h 05m

$668

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 3/20

12:00 pm-10:43 pm

1 stop17h 43m

Ontario

Thu 3/27

12:46 pm-9:45 am

1 stop13h 59m

$680

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 5/1

12:40 pm-10:10 pm

1 stop17h 30m

Ontario

Mon 5/12

12:46 pm-9:45 am

1 stop12h 59m

$692

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 4/17

7:30 am-6:20 pm

2 stops18h 50m

Ontario

Mon 4/21

2:44 pm-5:15 pm

2 stops18h 31m

$706

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 4/17

12:40 pm-11:50 pm

1 stop19h 10m

Ontario

Mon 4/21

7:00 am-9:40 am

2 stops18h 40m

$721

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 4/10

12:40 pm-10:10 pm

1 stop17h 30m

$597

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 4/10

10:40 am-10:10 pm

2 stops19h 30m

$598

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 3/28

8:40 am-11:54 pm

2 stops22h 14m

$599

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 3/20

12:00 pm-10:43 pm

1 stop17h 43m

$729

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 15 results
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Best time to book a flight from Ireland to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Ireland 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.

Travel insights for flights from Ireland to Ontario

Get recent, data-driven insights about flights from Ireland to Ontario including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Ireland to Ontario (average of $246). Flying from Ireland to Ontario in March is currently the most expensive (average of $315). 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.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated February 21, 2025.
See what other customers who have flown with Delta, KLM and United Airlines from Ireland to Ontario 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
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,765 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

WestJet
7.2
Good
2,801 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Ireland to Ontario. 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 into for flights to Ontario from Ireland?

    If you book a flight to Ontario from Ireland, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

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

    To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $597. British Airways flights start at $598 while deals on KLM start at $729 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ireland to Ontario 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 Ireland to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Ireland to Ontario (average of $246). Flying from Ireland to Ontario in March is currently the most expensive (average of $315). 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 Ireland to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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