How long is the flight from Ontario to Ireland?

Airlines like American Airlines, United Airlines, and British Airways fly from Ontario to Ireland in about 16h 30m. The time it takes to get you to your destination can typically vary by up to 3h 44m. There are 5072 mi between Ontario and Ireland. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

In terms of precipitation, rainfall in Ireland ranges from 1.9 - 3.1 inches per month. October is typically the wettest month, when rainfall can reach 3.1 in. February is typically the driest time to visit Ireland when rainfall is around 1.9 in.

If weather is an important factor for your trip to Ireland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

What are the most popular routes from Ontario to Ireland?

When deciding which route to take from Ontario to Ireland consider Ontario - Dublin, Ontario - Shannon or Ontario - Cork as they are the most popular.

What are the most popular airlines that fly from Ontario to Ireland?

The most popular airlines flying from Ontario to Ireland are American Airlines, Delta and Iberia. Something to consider prior to booking your flight.

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.

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.

$422+ Flights from Ontario to Ireland

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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”

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Cheap 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 December 4, 2025.

Wed 12/106:00 amONT - DUB

2 stops17h 30mUnited Airlines

Wed 12/179:30 amDUB - ONT

2 stops20h 19mUnited Airlines

Deal found 12/3

$527

Sat 12/2711:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Sat 1/109:30 amDUB - ONT

2 stops19h 28mUnited Airlines

Deal found 12/3

$583

Mon 12/157:05 amONT - DUB

1 stop16h 40mDelta

Wed 12/249:45 amDUB - ONT

1 stop18h 05mDelta

Deal found 12/3

$617

Sun 12/2811:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Sat 1/109:30 amDUB - ONT

2 stops19h 28mUnited Airlines

Deal found 12/3

$621

Mon 12/155:05 amONT - DUB

2 stops18h 25mUnited Airlines

Wed 12/2410:40 amDUB - ONT

2 stops18h 27mUnited Airlines

Deal found 12/3

$622

Fri 12/2611:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Sat 1/109:30 amDUB - ONT

2 stops19h 28mUnited Airlines

Deal found 12/3

$634

Sat 12/2711:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Thu 1/89:30 amDUB - ONT

2 stops20h 28mUnited Airlines

Deal found 12/3

$678

Sat 12/2711:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Fri 1/99:30 amDUB - ONT

2 stops20h 28mUnited Airlines

Deal found 12/3

$683

Tue 12/306:04 amONT - DUB

2 stops17h 26mUnited Airlines

Sat 1/109:30 amDUB - ONT

2 stops19h 28mUnited Airlines

Deal found 12/4

$690

Mon 12/157:05 amONT - DUB

1 stop16h 40mDelta

Fri 12/2611:30 amDUB - ONT

2 stops19h 53mDelta

Deal found 12/3

$717

Tue 12/166:00 amONT - DUB

2 stops17h 45mDelta

Wed 12/249:45 amDUB - ONT

1 stop18h 05mDelta

Deal found 12/3

$758

Thu 12/2512:55 pmONT - SNN

2 stops19h 50mBritish Airways

Tue 12/308:05 pmSNN - ONT

2 stops30h 11mBritish Airways

Deal found 12/2

$1,649

Best flights from Ontario to Ireland
Discover carefully curated flight deals from Ontario to Ireland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 4, 2025.

Sat 1/177:16 amONT - SNN

2 stops20h 14mAmerican Airlines

Sat 1/247:50 amSNN - ONT

2 stops22h 58mAmerican Airlines

Deal found 12/3

$484

Wed 5/277:00 amONT - SNN

1 stop16h 30mUnited Airlines

Fri 6/59:30 amSNN - ONT

1 stop20h 56mUnited Airlines

Deal found 12/2

$570

Wed 4/2212:55 pmONT - SNN

2 stops19h 15mBritish Airways

Mon 4/279:15 pmSNN - ONT

2 stops31h 03mBritish Airways

Deal found 12/3

$612

Wed 5/612:55 pmONT - DUB

1 stop12h 50mMultiple Airlines

Thu 5/2111:45 amDUB - ONT

1 stop13h 51mMultiple Airlines

Deal found 12/2

$622

Wed 5/277:00 amONT - SNN

1 stop16h 30mUnited Airlines

Thu 6/49:30 amSNN - ONT

1 stop20h 56mUnited Airlines

Deal found 12/2

$570

Wed 4/1512:55 pmONT - SNN

2 stops19h 15mBritish Airways

Mon 4/209:15 pmSNN - ONT

2 stops31h 03mBritish Airways

Deal found 12/3

$612

Wed 5/277:00 amONT - SNN

1 stop16h 30mUnited Airlines

Wed 6/39:30 amSNN - ONT

1 stop20h 56mUnited Airlines

Deal found 12/2

$570

Sat 3/2810:56 amONT - DUB

1 stop14h 49mMultiple Airlines

Mon 4/612:40 pmDUB - ONT

1 stop16h 44mMultiple Airlines

Deal found 12/2

$627

Mon 3/307:00 amONT - DUB

1 stop18h 45mUnited Airlines

Mon 4/611:35 amDUB - ONT

1 stop18h 51mUnited Airlines

Deal found 12/2

$577

Fri 1/305:05 amONT - DUB

2 stops19h 05mUnited Airlines

Tue 2/310:40 amDUB - ONT

2 stops20h 13mUnited Airlines

Deal found 12/3

$577

Tue 4/2112:55 pmONT - ORK

2 stops18h 15mBritish Airways

Tue 4/2811:45 amORK - ONT

2 stops20h 03mBritish Airways

Deal found 12/3

$701

Mon 12/2911:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Sat 1/109:30 amDUB - ONT

2 stops20h 28mUnited Airlines

Deal found 12/3

$583

Fri 2/136:10 amONT - ORK

2 stops21h 00mBritish Airways

Tue 2/175:35 pmORK - ONT

2 stops34h 22mBritish Airways

Deal found 12/2

$775

Mon 3/307:00 amONT - DUB

1 stop18h 45mUnited Airlines

Sun 4/511:35 amDUB - ONT

1 stop18h 51mUnited Airlines

Deal found 12/3

$615

Sun 3/297:00 amONT - DUB

1 stop18h 45mUnited Airlines

Mon 4/611:35 amDUB - ONT

1 stop18h 51mUnited Airlines

Deal found 12/2

$615

Sat 12/2010:29 pmONT - ORK

2 stops32h 31mDelta

Wed 12/2411:15 amORK - ONT

2 stops57h 14mDelta

Deal found 12/4

$2,262

Sun 3/110:59 amONT - ORK

2 stops16h 11mBritish Airways

Sun 3/811:55 amORK - ONT

2 stops19h 04mBritish Airways

Deal found 12/4

$858

Tue 3/316:00 amONT - DUB

2 stops19h 45mUnited Airlines

Sun 4/511:35 amDUB - ONT

1 stop18h 51mUnited Airlines

Deal found 12/3

$619

Fri 1/233:09 pmONT - ORK

2 stops16h 16mBritish Airways

Sun 2/1511:55 amORK - ONT

2 stops18h 34mBritish Airways

Deal found 12/3

$882

Wed 4/16:00 amONT - DUB

2 stops17h 30mUnited Airlines

Mon 4/1311:35 amDUB - ONT

2 stops17h 11mUnited Airlines

Deal found 12/2

$619

Thu 4/27:00 amONT - DUB

1 stop18h 45mUnited Airlines

Mon 4/1311:35 amDUB - ONT

1 stop18h 51mUnited Airlines

Deal found 12/2

$627

Mon 1/512:45 pmONT - ORK

2 stops18h 40mBritish Airways

Sun 1/1811:55 amORK - ONT

2 stops18h 53mBritish Airways

Deal found 12/4

$955

Thu 5/287:00 amONT - SNN

1 stop16h 30mUnited Airlines

Thu 6/49:30 amSNN - ONT

1 stop20h 56mUnited Airlines

Deal found 12/2

$630

Fri 5/297:00 amONT - SNN

1 stop16h 30mUnited Airlines

Fri 6/59:30 amSNN - ONT

1 stop20h 56mUnited Airlines

Deal found 12/2

$630

Thu 12/182:42 pmONT - ORK

2 stops16h 43mBritish Airways

Tue 12/2311:55 amORK - ONT

2 stops18h 19mBritish Airways

Deal found 12/4

$2,574

Sun 12/2112:45 pmONT - ORK

2 stops18h 40mBritish Airways

Tue 1/67:40 amORK - ONT

2 stops23h 08mBritish Airways

Deal found 12/3

$2,650

Last-minute flights from Ontario to Ireland
Discover last-minute flight deals from Ontario to Ireland. Data last updated December 4, 2025 and is based on user searches.

Wed 12/106:00 amONT - DUB

2 stops17h 30mUnited Airlines

Wed 12/179:30 amDUB - ONT

2 stops20h 19mUnited Airlines

Deal found 12/3

$527

Mon 12/157:05 amONT - DUB

1 stop16h 40mDelta

Wed 12/249:45 amDUB - ONT

1 stop18h 05mDelta

Deal found 12/3

$617

Sat 12/2711:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Sat 1/109:30 amDUB - ONT

2 stops20h 28mUnited Airlines

Deal found 12/3

$583

Sun 12/2811:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Sat 1/109:30 amDUB - ONT

2 stops19h 28mUnited Airlines

Deal found 12/3

$621

Mon 1/511:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Fri 1/169:00 amDUB - ONT

3 stops35h 17mUnited Airlines

Deal found 12/3

$523

Sun 1/1110:58 amONT - DUB

2 stops17h 17mBritish Airways

Sat 1/178:40 pmDUB - ONT

2 stops28h 42mBritish Airways

Deal found 12/4

$593

Sat 1/177:16 amONT - SNN

2 stops20h 14mAmerican Airlines

Sat 1/247:50 amSNN - ONT

2 stops22h 58mAmerican Airlines

Deal found 12/3

$484

Tue 1/204:45 pmONT - DUB

2 stops16h 15mBritish Airways

Fri 1/308:35 pmDUB - ONT

2 stops30h 10mBritish Airways

Deal found 12/3

$555

Fri 1/2311:59 pmONT - DUB

2 stops25h 51mBritish Airways

Fri 1/308:35 pmDUB - ONT

2 stops30h 10mBritish Airways

Deal found 12/2

$607

Mon 1/263:09 pmONT - DUB

2 stops16h 11mBritish Airways

Mon 2/28:40 pmDUB - ONT

2 stops30h 05mBritish Airways

Deal found 12/3

$543

Mon 1/263:09 pmONT - DUB

2 stops16h 11mBritish Airways

Sun 2/1510:45 amDUB - ONT

2 stops19h 44mBritish Airways

Deal found 12/3

$595

Fri 1/305:05 amONT - DUB

2 stops18h 25mUnited Airlines

Tue 2/310:40 amDUB - ONT

2 stops18h 18mUnited Airlines

Deal found 12/2

$577

One-way flights from Ontario to Ireland
Search for one-way flight options from Ontario to Ireland. Find affordable one-way fares based on user searches. Data last updated December 4, 2025.

Tue 3/35:06 pmONT - DUB

2 stops15h 54mBritish Airways

Deal found 12/3

$422

Tue 12/96:00 amONT - DUB

3 stops19h 55mUnited Airlines

Deal found 12/2

$438

Mon 4/66:00 amONT - DUB

2 stops20h 40mUnited Airlines

Deal found 12/3

$444

Wed 1/1412:41 pmONT - ORK

2 stops26h 44mDelta

Deal found 12/3

$448

Wed 3/1810:56 amONT - SNN

2 stops17h 34mBritish Airways

Deal found 12/3

$453

Sat 12/2711:59 pmONT - DUB

1 stop24h 11mUnited Airlines

Deal found 12/3

$454

Sun 3/111:59 pmONT - DUB

2 stops25h 51mBritish Airways

Deal found 12/4

$457

Sun 12/286:39 pmONT - DUB

2 stops29h 31mUnited Airlines

Deal found 12/3

$460

Mon 2/233:19 pmONT - SNN

2 stops17h 26mBritish Airways

Deal found 12/3

$467

Wed 1/144:45 pmONT - SNN

2 stops16h 00mAmerican Airlines

Deal found 12/3

$469

Fri 1/1611:59 pmONT - DUB

2 stops25h 51mBritish Airways

Deal found 12/3

$472

Sun 2/156:00 amONT - DUB

2 stops17h 30mUnited Airlines

Deal found 12/4

$473

Find flight deals from Ontario to Ireland

Most accurate provider	eDreams 3 stars
Most trusted provider	Gurufare 3 stars
Round-trip from	$484 (American Airlines)
One-way from	$422 (oojo)
Popular in	June
Cheapest in	February
Average price	$781

Provider with most accurate pricing for Los Angeles-Dublin flight deals.

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Provider most trusted by Cheapflights users for Los Angeles-Dublin flights.

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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 ($180 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 December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 1/17

7:16 am-11:30 am

2 stops20h 14m

Shannon

Sat 1/24

7:50 am-10:48 pm

2 stops22h 58m

$484

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 5/27

7:00 am-7:30 am

1 stop16h 30m

Shannon

Fri 6/5

9:30 am-10:26 pm

1 stop20h 56m

$570

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 5/27

7:00 am-7:30 am

1 stop16h 30m

Shannon

Thu 6/4

9:30 am-10:26 pm

1 stop20h 56m

$570

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 5/27

7:00 am-7:30 am

1 stop16h 30m

Shannon

Wed 6/3

9:30 am-10:26 pm

1 stop20h 56m

$570

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 3/30

7:00 am-9:45 am

1 stop18h 45m

Dublin

Mon 4/6

11:35 am-10:26 pm

1 stop18h 51m

$577

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 1/30

5:05 am-8:10 am

2 stops19h 05m

Dublin

Tue 2/3

10:40 am-10:53 pm

2 stops20h 13m

$577

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 12/29

11:59 pm-8:10 am

1 stop24h 11m

Dublin

Sat 1/10

9:30 am-9:58 pm

2 stops20h 28m

$583

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 4/22

12:55 pm-4:10 pm

2 stops19h 15m

Shannon

Mon 4/27

9:15 pm-8:18 pm

2 stops31h 03m

$612

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 4/15

12:55 pm-4:10 pm

2 stops19h 15m

Shannon

Mon 4/20

9:15 pm-8:18 pm

2 stops31h 03m

$612

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 3/30

7:00 am-9:45 am

1 stop18h 45m

Dublin

Sun 4/5

11:35 am-10:26 pm

1 stop18h 51m

$615

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 54 results

...

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, December is the cheapest month in which you can book a flight from Ontario to Ireland (average of $434). 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.

What is the cheapest time of day to fly from ONT to IE?

When flying from Ontario to Ireland, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 42% versus a flight in the afternoon.

Reviews of airlines servicing Ireland

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

8,011 reviews

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

8,011 reviews

Delta

7.9

Good

8,011 reviews

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

11,043 reviews

Delta

7.9

Good

8,011 reviews

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

3,039 reviews

Delta

7.9

Good

8,011 reviews

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

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 American Airlines, United Airlines, and British Airways fly from Ontario to Ireland in about 16h 30m. The time it takes to get you to your destination can typically vary by up to 3h 44m. There are 5072 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 - Shannon or Ontario - Cork 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, December is the cheapest month in which you can book a flight from Ontario to Ireland (average of $434). 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

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Top 3 airlines flying from Ontario to Ireland

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$527	Average$846	FlexibilityNo cancel fee	On-timeN/A
Iberia	Cheapest$547	Average$891	FlexibilityNo cancel fee	On-time77%
American Airlines	Cheapest$677	Average$932	FlexibilityNo cancel fee	On-time71%

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$422+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Ontario to Ireland

Cheapest flights from Ontario to IrelandExplore 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 December 4, 2025.

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 December 4, 2025.

Find flight deals from Ontario to Ireland

Keep the following information in mind while searching for Ontario to Ireland flight deals. Data was last updated December 4, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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.

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?

What is the cheapest time of day to fly from ONT to IE?

Find hourly flight availability from Ontario to Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

Reviews of airlines servicing Ireland

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.

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?

How long is the flight from Ontario to Ireland?

What are the most popular routes from Ontario to Ireland?

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

How can I find direct flights from Ontario to Ireland?

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

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

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.

Top 3 airlines flying from Ontario to Ireland

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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 December 4, 2025.