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Ontario

$423+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$601
(United Airlines)

One-way from

$423
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$677
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 ($146 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 May 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 May 1, 2025.

This United Airlines deal was found by Cheapflights users on 4/30. 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 5/159:50 amDUB - ONT
2 stops40h 11mUnited Airlines
Mon 5/191:45 pmONT - DUB
3 stops33h 35mUnited Airlines
Deal found 4/30$601
This KLM deal was found by Cheapflights users on 4/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1511:10 amDUB - ONT
2 stops19h 25mKLM
Mon 5/197:05 amONT - DUB
1 stop17h 40mKLM
Deal found 4/30$608
This Iberia deal was found by Cheapflights users on 4/30. 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.
Fri 5/912:40 pmDUB - ONT
1 stop17h 18mIberia
Sun 5/2512:45 pmONT - DUB
1 stop13h 00mIberia
Deal found 4/30$617
This American Airlines deal was found by Cheapflights users on 5/1. 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.
Fri 5/912:40 pmDUB - ONT
1 stop13h 56mAmerican Airlines
Sun 5/2512:45 pmONT - DUB
1 stop13h 00mAmerican Airlines
Deal found 5/1$638
This Flighttix deal was found by Cheapflights users on 4/30. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/149:20 amDUB - ONT
2 stops21h 25mAir Canada
Sat 6/216:41 pmONT - DUB
2 stops53h 04mAir Canada
Deal found 4/30$752
This lol.travel deal was found by Cheapflights users on 4/30. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/112:40 pmDUB - ONT
1 stop14h 21mMultiple Airlines
Mon 7/1412:46 pmONT - DUB
2 stops22h 44mMultiple Airlines
Deal found 4/30$809
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Thu 5/811:45 amORK - ONT
2 stops18h 12mMultiple Airlines
Tue 5/1310:00 amONT - ORK
2 stops40h 45mMultiple Airlines
Deal found 4/30$1,234
This EaseMyTrip deal was found by Cheapflights users on 4/30. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:40 amDUB - ONT
2 stops21h 23mBritish Airways
Thu 1/111:00 amONT - DUB
2 stops17h 20mBritish Airways
Deal found 4/30$2,044
This TravelUp deal was found by Cheapflights users on 4/30. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/811:00 amDUB - ONT
1 stop19h 41mAir France
Sat 9/2712:00 pmONT - DUB
1 stop12h 45mAir France
Deal found 4/30$3,669

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 May 1, 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

Thu 5/15

9:50 am-6:01 pm

2 stops40h 11m

Ontario

Mon 5/19

1:45 pm-7:20 am

3 stops33h 35m

$601

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 5/15

11:10 am-10:35 pm

2 stops19h 25m

Ontario

Mon 5/19

7:05 am-8:45 am

1 stop17h 40m

$608

DublinOntario

DUB - ONT

DUBONT

Dublin

Sun 5/11

12:40 pm-6:36 pm

1 stop13h 56m

Ontario

Sun 5/25

12:45 pm-9:45 am

1 stop13h 00m

$638

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 5/28

12:40 pm-11:43 pm

1 stop19h 03m

Ontario

Wed 6/4

10:51 am-9:45 am

1 stop14h 54m

$663

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 6/14

9:20 am-10:45 pm

2 stops21h 25m

Ontario

Sat 6/21

6:41 pm-7:45 am

2 stops53h 04m

$752

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 7/1

12:40 pm-7:01 pm

1 stop14h 21m

Ontario

Mon 7/14

12:46 pm-7:30 pm

2 stops22h 44m

$809

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 9/8

11:00 am-10:41 pm

1 stop19h 41m

Ontario

Sat 9/27

12:00 pm-8:45 am

1 stop12h 45m

$3,669

CorkOntario

ORK - ONT

ORKONT

Cork

Thu 5/15

8:55 pm-11:59 pm

3 stops59h 04m

$423

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 6/10

11:30 am-9:10 pm

1 stop17h 40m

$541

DublinOntario

DUB - ONT

DUBONT

Dublin

Sun 9/14

12:40 pm-9:56 pm

1 stop17h 16m

$612

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 16 results
1
2

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 May 1, 2025.
See what other customers who have flown with KLM, Air France 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.
KLM
7.8
Good
1,334 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,334 reviews
KLM
7.8
Good
1,334 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Air France
7.4
Good
1,448 reviews
KLM
7.8
Good
1,334 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
United Airlines
7.4
Good
8,696 reviews
KLM
7.8
Good
1,334 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
JetBlue
7.3
Good
2,923 reviews
KLM
7.8
Good
1,334 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,334 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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 $541. Iberia flights start at $612 while deals on British Airways start at $651 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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