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Ontario

$579+ Cheap flights from Ireland to Ontario (ONT)

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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$588
(Iberia)

One-way from

$579
(Thrive Travel)

Popular in

July

Cheapest in

February

Average price

$640
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.
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From Ireland to Ontario
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One-way flight from Ireland to Ontario
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Highest demand for flights based on searches. 17% potential increase in price ($144 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Iberia deal was found by Cheapflights users on 3/29. 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.
Sat 4/2612:40 pmDUB - ONT
1 stop17h 18mIberia
Sat 5/312:50 pmONT - DUB
1 stop12h 55mIberia
Deal found 3/29$588
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Tue 4/1512:40 pmDUB - ONT
1 stop29h 14mAmerican Airlines
Sat 4/1910:40 pmONT - DUB
1 stop22h 50mAmerican Airlines
Deal found 3/30$591
This Iberia deal was found by Cheapflights users on 3/30. 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 5/110:40 amDUB - ONT
2 stops21h 10mMultiple Airlines
Thu 5/810:53 amONT - DUB
1 stop14h 52mMultiple Airlines
Deal found 3/30$592
This Air France deal was found by Cheapflights users on 3/30. 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.
Tue 4/1511:10 amDUB - ONT
2 stops19h 33mKLM
Sat 4/1910:15 pmONT - DUB
1 stop26h 30mKLM
Deal found 3/30$595
This Delta deal was found by Cheapflights users on 3/30. 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 4/158:55 amDUB - ONT
2 stops21h 41mDelta
Sat 4/1910:15 pmONT - DUB
2 stops26h 05mDelta
Deal found 3/30$597
This United Airlines deal was found by Cheapflights users on 3/30. 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 11/2711:50 amDUB - ONT
2 stops16h 27mUnited Airlines
Tue 12/96:00 amONT - DUB
2 stops20h 05mUnited Airlines
Deal found 3/30$633
This Billigflug deal was found by Cheapflights users on 3/31. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1911:00 amDUB - ONT
1 stop19h 36mAir France
Sat 4/2612:07 pmONT - DUB
1 stop12h 38mAir France
Deal found 3/31$734
This Air Canada deal was found by Cheapflights users on 3/30. 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.
Sun 5/49:20 amDUB - ONT
2 stops16h 41mAir Canada
Tue 5/206:00 amONT - DUB
2 stops17h 45mAir Canada
Deal found 3/30$2,901

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 March 31, 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

Sat 4/26

12:40 pm-9:58 pm

1 stop17h 18m

Ontario

Sat 5/3

12:50 pm-9:45 am

1 stop12h 55m

$588

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 4/15

12:40 pm-9:54 am

1 stop29h 14m

Ontario

Sat 4/19

10:40 pm-5:30 am

1 stop22h 50m

$591

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 5/1

10:40 am-11:50 pm

2 stops21h 10m

Ontario

Thu 5/8

10:53 am-9:45 am

1 stop14h 52m

$592

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 4/15

11:10 am-10:43 pm

2 stops19h 33m

Ontario

Sat 4/19

10:15 pm-8:45 am

1 stop26h 30m

$595

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 4/15

8:55 am-10:36 pm

2 stops21h 41m

Ontario

Sat 4/19

10:15 pm-8:20 am

2 stops26h 05m

$597

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 4/19

11:00 am-10:36 pm

1 stop19h 36m

Ontario

Sat 4/26

12:07 pm-8:45 am

1 stop12h 38m

$734

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 4/19

11:35 am-9:58 pm

2 stops18h 23m

Ontario

Sat 4/26

7:05 am-10:20 am

2 stops19h 15m

$867

DublinOntario

DUB - ONT

DUBONT

Dublin

Sun 5/4

9:20 am-6:01 pm

2 stops16h 41m

Ontario

Tue 5/20

6:00 am-7:45 am

2 stops17h 45m

$2,901

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 4/10

9:30 am-9:58 pm

2 stops20h 28m

$579

DublinOntario

DUB - ONT

DUBONT

Dublin

Sun 9/14

12:40 pm-11:36 pm

1 stop18h 56m

$614

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 17 results
1
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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 $326). 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 March 31, 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
7,899 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Food

7.3

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Food

7.3

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
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Food

7.3

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
7.4
Good
1,425 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Food

7.3

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
8,614 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Food

7.3

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
2,924 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Food

7.3

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 $614. British Airways flights start at $615 while deals on JetBlue start at $725 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 $326). 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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