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Ontario

$587+ 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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
jun. 28 — jul. 51
sáb. 6/28
sáb. 7/5
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 junio 23, 2025.

Round-trip from

$587
(Iberia)

Popular in

July

Cheapest in

February

Average price

$775
From Ireland to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($140 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

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 junio 23, 2025.

This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1912:40 pmDUB - ONT
1 stop14h 14mIberia
vie. 10/38:15 amONT - DUB
1 stop17h 30mIberia
Deal found 6/23$587
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.
vie. 9/512:40 pmDUB - ONT
1 stop14h 14mAmerican Airlines
dom. 9/1412:46 pmONT - DUB
1 stop12h 59mAmerican Airlines
Deal found 6/21$589
This TravelUp deal was found by Cheapflights users on 6/20. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/1612:40 pmDUB - ONT
1 stop13h 44mMultiple Airlines
lun. 9/112:47 pmONT - DUB
1 stop12h 58mMultiple Airlines
Deal found 6/20$691
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.
mié. 8/69:50 amDUB - ONT
2 stops34h 42mUnited Airlines
mié. 8/137:00 amONT - DUB
2 stops16h 45mUnited Airlines
Deal found 6/22$713
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/119:20 amDUB - ONT
3 stops35h 12mAir Canada
dom. 8/175:05 amONT - DUB
3 stops18h 40mAir Canada
Deal found 6/21$731
This Kissandfly.com 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/611:35 amDUB - ONT
1 stop18h 31mLufthansa
mié. 8/137:00 amONT - DUB
1 stop18h 45mLufthansa
Deal found 6/22$813
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.
lun. 7/1411:00 amDUB - ONT
1 stop16h 20mKLM
lun. 7/217:05 amONT - DUB
1 stop17h 40mKLM
Deal found 6/22$844
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/148:35 amDUB - ONT
2 stops17h 50mBritish Airways
mar. 8/192:57 pmONT - DUB
2 stops18h 08mBritish Airways
Deal found 6/21$868
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.
mié. 7/1611:00 amDUB - ONT
1 stop16h 20mDelta
sáb. 8/27:05 amONT - DUB
1 stop17h 40mDelta
Deal found 6/22$880
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.
sáb. 7/1911:00 amDUB - ONT
1 stop16h 20mAir France
vie. 8/111:40 amONT - DUB
1 stop13h 05mAir France
Deal found 6/22$1,172
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/1711:45 amORK - ONT
2 stops17h 54mMultiple Airlines
dom. 8/2412:47 pmONT - ORK
2 stops23h 03mMultiple Airlines
Deal found 6/22$1,412
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.
lun. 7/711:45 amORK - ONT
2 stops17h 53mAmerican Airlines
vie. 7/118:15 amONT - ORK
2 stops18h 30mAmerican Airlines
Deal found 6/21$1,703

Cheapflights Fare Finder

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

Fly from

Ireland

Fly to

Ontario

Route

Depart

Return

Price

DublinOntario

DUB - ONT

DUBONT

Dublin

vie. 9/19

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

vie. 10/3

8:15 am-9:45 am

1 stop17h 30m

$587

DublinOntario

DUB - ONT

DUBONT

Dublin

vie. 9/5

12:40 pm-6:54 pm

1 stop14h 14m

Ontario

dom. 9/14

12:46 pm-9:45 am

1 stop12h 59m

$589

DublinOntario

DUB - ONT

DUBONT

Dublin

sáb. 8/16

12:40 pm-6:24 pm

1 stop13h 44m

Ontario

lun. 9/1

12:47 pm-9:45 am

1 stop12h 58m

$691

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 8/6

9:50 am-12:32 pm

2 stops34h 42m

Ontario

mié. 8/13

7:00 am-7:45 am

2 stops16h 45m

$713

DublinOntario

DUB - ONT

DUBONT

Dublin

lun. 8/11

9:20 am-12:32 pm

3 stops35h 12m

Ontario

dom. 8/17

5:05 am-7:45 am

3 stops18h 40m

$731

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 8/6

11:35 am-10:06 pm

1 stop18h 31m

Ontario

mié. 8/13

7:00 am-9:45 am

1 stop18h 45m

$813

DublinOntario

DUB - ONT

DUBONT

Dublin

lun. 7/14

11:00 am-7:20 pm

1 stop16h 20m

Ontario

lun. 7/21

7:05 am-8:45 am

1 stop17h 40m

$844

DublinOntario

DUB - ONT

DUBONT

Dublin

jue. 8/14

8:35 am-6:25 pm

2 stops17h 50m

Ontario

mar. 8/19

2:57 pm-5:05 pm

2 stops18h 08m

$868

DublinOntario

DUB - ONT

DUBONT

Dublin

mié. 7/16

11:00 am-7:20 pm

1 stop16h 20m

Ontario

sáb. 8/2

7:05 am-8:45 am

1 stop17h 40m

$880

DublinOntario

DUB - ONT

DUBONT

Dublin

sáb. 7/19

11:00 am-7:20 pm

1 stop16h 20m

Ontario

vie. 8/1

11:40 am-8:45 am

1 stop13h 05m

$1,172

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/23

Showing 1-10 of 23 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.

Cheapflights Insights

Everything you need to know about your flight from Ireland to Ontario

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 $328). 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 junio 23, 2025.
See what other customers who have flown with Delta, KLM and Air France 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
7,965 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Overall

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
7,965 reviews
Delta
8.0
Very good
7,965 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Overall

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
1,365 reviews
Delta
8.0
Very good
7,965 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Overall

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
Air France
7.5
Good
1,470 reviews
Delta
8.0
Very good
7,965 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Overall

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
8,831 reviews
Delta
8.0
Very good
7,965 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Overall

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
JetBlue
7.3
Good
2,922 reviews
Delta
8.0
Very good
7,965 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Overall

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 JetBlue, which is currently one of the cheapest options available, starting at $612. Iberia flights start at $648 while deals on British Airways start at $740 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 $328). 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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