HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ireland

$186+ 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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DUB
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Ireland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$486
(Ovago)

One-way from

$186
(British Airways)

Popular in

June

Cheapest in

January

Average price

$588
Provider with most accurate pricing for Los Angeles-Dublin flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Dublin flights.
Search Deals
From Ontario to Ireland
Search Deals
One-way flight from Ontario to Ireland
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($175 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 8, 2026.

This Ovago deal was found by Cheapflights users on 1/7. 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.
Wed 2/44:45 pmONT - DUB
2 stops15h 50mBritish Airways
Wed 2/117:45 pmDUB - ONT
2 stops30h 57mBritish Airways
Deal found 1/7$486
This British Airways deal was found by Cheapflights users on 1/5. 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.
Thu 3/57:00 amONT - SNN
2 stops25h 45mBritish Airways
Mon 3/98:05 pmSNN - ONT
2 stops29h 37mBritish Airways
Deal found 1/5$488
This Gurufare deal was found by Cheapflights users on 1/6. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:00 amONT - DUB
2 stops19h 15mBritish Airways
Wed 2/258:45 amDUB - ONT
2 stops19h 00mBritish Airways
Deal found 1/6$488
This oojo deal was found by Cheapflights users on 1/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/216:00 amONT - DUB
2 stops21h 15mBritish Airways
Wed 1/287:45 pmDUB - ONT
2 stops29h 37mBritish Airways
Deal found 1/7$489
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/172:31 pmONT - DUB
2 stops17h 14mBritish Airways
Mon 8/317:00 pmDUB - ONT
2 stops31h 17mBritish Airways
Deal found 1/6$491
This oojo deal was found by Cheapflights users on 1/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/117:16 amONT - ORK
2 stops19h 54mBritish Airways
Tue 3/311:55 amORK - ONT
2 stops18h 54mBritish Airways
Deal found 1/6$492
This oojo deal was found by Cheapflights users on 1/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2810:58 amONT - ORK
2 stops20h 27mBritish Airways
Tue 2/37:40 amORK - ONT
2 stops19h 05mBritish Airways
Deal found 1/5$493
This oojo deal was found by Cheapflights users on 1/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1212:19 pmONT - DUB
2 stops21h 56mBritish Airways
Tue 4/218:40 amDUB - ONT
2 stops21h 55mBritish Airways
Deal found 1/6$493
This oojo deal was found by Cheapflights users on 1/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/284:45 pmONT - DUB
2 stops16h 15mBritish Airways
Tue 2/37:35 amDUB - ONT
2 stops23h 13mBritish Airways
Deal found 1/5$494
This oojo deal was found by Cheapflights users on 1/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2512:47 pmONT - DUB
2 stops17h 58mBritish Airways
Tue 9/11:30 pmDUB - ONT
2 stops18h 38mBritish Airways
Deal found 1/8$498
This American Airlines deal was found by Cheapflights users on 1/6. 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 4/222:08 pmONT - DUB
2 stops16h 42mAmerican Airlines
Tue 4/289:30 amDUB - ONT
1 stop19h 24mAmerican Airlines
Deal found 1/6$501
This Iberia deal was found by Cheapflights users on 1/6. 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.
Tue 4/2110:59 amONT - DUB
2 stops19h 36mMultiple Airlines
Wed 4/299:30 amDUB - ONT
1 stop21h 05mMultiple Airlines
Deal found 1/6$502

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 January 8, 2026.
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

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 3/5

7:00 am-4:45 pm

2 stops25h 45m

Shannon

Mon 3/9

8:05 pm-6:42 pm

2 stops29h 37m

$488

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 2/18

7:00 am-10:15 am

2 stops19h 15m

Dublin

Wed 2/25

8:45 am-7:45 pm

2 stops19h 00m

$488

OntarioCork

ONT - ORK

ONTORK

Ontario

Wed 2/11

10:58 am-3:25 pm

2 stops20h 27m

Cork

Tue 3/10

7:40 am-10:49 pm

2 stops22h 09m

$492

OntarioCork

ONT - ORK

ONTORK

Ontario

Wed 2/11

7:16 am-11:10 am

2 stops19h 54m

Cork

Tue 3/3

11:55 am-10:49 pm

2 stops18h 54m

$492

OntarioCork

ONT - ORK

ONTORK

Ontario

Wed 1/28

10:58 am-3:25 pm

2 stops20h 27m

Cork

Tue 2/3

7:40 am-6:45 pm

2 stops19h 05m

$493

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 4/8

2:08 pm-2:50 pm

2 stops16h 42m

Dublin

Tue 4/21

9:45 am-8:54 pm

2 stops19h 09m

$493

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Tue 3/10

10:56 am-11:15 am

2 stops17h 19m

Dublin

Tue 4/21

9:45 am-8:54 pm

2 stops19h 09m

$493

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 1/28

4:45 pm-5:00 pm

2 stops16h 15m

Dublin

Tue 2/3

7:35 am-10:48 pm

2 stops23h 13m

$494

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 3/4

2:39 pm-3:40 pm

2 stops17h 01m

Dublin

Tue 3/10

6:40 am-6:42 pm

2 stops19h 02m

$506

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 1/12

4:45 pm-5:45 pm

2 stops17h 00m

Dublin

Wed 1/28

7:35 am-10:48 pm

2 stops23h 13m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 38 results
1
2
3
4

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, January is the cheapest month in which you can book a flight from Ontario to Ireland (average of $451). Flying from Ontario to Ireland in June is currently the most expensive (average of $682). 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.

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 January 8, 2026.
Read through reviews of airlines operating flights from Ontario to Ireland, such as Delta, American Airlines, and Iberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,031 reviews

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

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
7.9
Good
8,031 reviews
Delta
7.9
Good
8,031 reviews

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

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.
American Airlines
7.2
Good
11,094 reviews
Delta
7.9
Good
8,031 reviews

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

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.
Iberia
7.0
Good
3,079 reviews
Delta
7.9
Good
8,031 reviews

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

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.

  • How long is the flight from Ontario to Ireland?

    Airlines like British Airways, Delta, and American Airlines fly from Ontario to Ireland in about 21h 25m. The time it takes to get you to your destination can typically vary by up to 4h 20m. There are 5121 mi between Ontario and Ireland. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Ontario to Ireland?

    When deciding which route to take from Ontario to Ireland consider Ontario - Dublin, Ontario - Cork or Ontario - Shannon 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, January is the cheapest month in which you can book a flight from Ontario to Ireland (average of $451). Flying from Ontario to Ireland in June is currently the most expensive (average of $682). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Ireland

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights
San Francisco to Heathrow flights
Los Angeles to Charles de Gaulle flights
San Francisco to Charles de Gaulle flights
Los Angeles to Leonardo da Vinci/Fiumicino flights
San Francisco to Leonardo da Vinci/Fiumicino flights
Los Angeles to Istanbul flights
Los Angeles to Orly flights
San Francisco to Barcelona-El Prat flights
Los Angeles to Madrid flights
Los Angeles to Gatwick flights
Los Angeles to Barcelona-El Prat flights
San Francisco to Lisbon flights
San Francisco to Gatwick flights
Los Angeles to London City flights
Los Angeles to Frankfurt flights
Los Angeles to Dublin flights
Los Angeles to Lisbon flights
San Francisco to London City flights
Los Angeles to Amsterdam flights
Los Angeles to Stansted flights
San Diego to Heathrow flights
San Francisco to Istanbul flights
San Francisco to Orly flights
San Francisco to Stansted flights
San Francisco to Amsterdam flights
San Francisco to Dublin flights
San Francisco to Frankfurt flights
Ontario to Charles de Gaulle flights
San Francisco to Madrid flights
Los Angeles to Athens flights
Santa Ana to Charles de Gaulle flights
San Francisco to Zurich flights
Ontario to Heathrow flights
Ontario to Leonardo da Vinci/Fiumicino flights
Las Vegas to Heathrow flights
San Francisco to Athens flights
Burbank to Charles de Gaulle flights
Los Angeles to Zurich flights
Los Angeles to Malpensa flights
San Francisco to Malpensa flights
Santa Ana to Leonardo da Vinci/Fiumicino flights
Los Angeles to Sabiha Gokcen flights
San Jose to Charles de Gaulle flights
Los Angeles to Copenhagen flights
San Francisco to Linate flights
Los Angeles to Keflavik Intl flights
San Francisco to Munich flights
San Francisco to Copenhagen flights
San Francisco to Keflavik Intl flights

Top 3 airlines flying from Ontario to Ireland

Discover the top 3 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$527Average$846FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$547Average$891FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$683Average$975FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.