What are the cheapest airlines flying from Ontario to Dublin round-trip?

Cheapflights users have booked flights from Ontario to Dublin round-trip from $651. Other airlines that can offer you cheap pricing are Delta, from $652, and JetBlue, from $666. Users have found that United Airlines is 16% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Ontario to Dublin one-way?

One-way options have recently been found by users for as low as $469 on American Airlines. Other airlines that offer cheap prices include KLM from $473 and Iberia from $500 one-way.

What is the cheapest day to fly from Ontario to Dublin?

Travelers seeking maximum savings on their Ontario to Dublin flight should consider departing on Wednesday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

American Airlines, Delta and Iberia are the most popular airlines when flying from Ontario to Dublin.

What is the cheapest day to fly round-trip from Ontario to Dublin?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 27% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Ontario to Dublin?

To save up to 31% on this flight, we recommend booking at least 21 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Ontario to Dublin from $728 1-2 weeks out and tickets from $918 for flights departing within the next 72 hours.

What is the cheapest month to fly from Ontario to Dublin?

Flights from Ontario to Dublin lean towards being more expensive in June. Prices are generally better when you fly from Ontario to Dublin in January, with the cheapest ticket starting at $408.

Most accurate provider : When it comes to deals on Ontario-Dublin flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ontario-Dublin flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Ontario-Dublin flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Dublin flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Dublin flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Yes. In addition to deals on Ontario to Dublin flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to Dublin?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Dublin.

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

Yes. Cheapflights offers flight deals from Ontario to Dublin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$469+ Flights from Ontario to Dublin

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Find cheap flights from Ontario to Dublin 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.

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Cheap flight deals from Ontario to Dublin

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$651 (United Airlines)
One-way from	$469 (American Airlines)
Popular in	July
Cheapest in	November
Average price	$851

Provider with most accurate pricing for Ontario-Dublin flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-Dublin flights.

Search Deals

From Ontario to Dublin

Search Deals

One-way flight from Ontario to Dublin

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($164 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in May 2025

Search Deals

Find flight deals from Ontario to Dublin

Cheapest flights from Ontario to Dublin
Explore the most affordable flight options available from Ontario to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 12, 2025.

Wed 10/2910:40 amONT - DUB

2 stops16h 25mUnited Airlines

Fri 11/79:00 amDUB - ONT

2 stops19h 17mUnited Airlines

Deal found 5/11

$651

Wed 10/2912:00 pmONT - DUB

1 stop12h 45mDelta

Fri 11/79:45 amDUB - ONT

1 stop20h 56mDelta

Deal found 5/11

$652

Wed 10/296:47 amONT - DUB

2 stops17h 28mMultiple Airlines

Thu 11/611:30 amDUB - ONT

2 stops18h 11mMultiple Airlines

Deal found 5/12

$656

Mon 5/2610:59 pmONT - DUB

1 stop25h 21mJetBlue

Wed 6/1111:30 amDUB - ONT

1 stop17h 41mJetBlue

Deal found 5/11

$666

Sun 10/2612:00 pmONT - DUB

1 stop12h 45mKLM

Mon 11/39:45 amDUB - ONT

1 stop20h 56mKLM

Deal found 5/11

$675

Sat 11/812:53 pmONT - DUB

1 stop34h 22mIberia

Sun 11/162:05 pmDUB - ONT

1 stop15h 55mIberia

Deal found 5/12

$703

Fri 7/254:45 pmONT - DUB

2 stops18h 35mBritish Airways

Mon 8/48:55 pmDUB - ONT

2 stops29h 13mBritish Airways

Deal found 5/10

$760

Fri 7/256:10 amONT - DUB

2 stops17h 35mAir Canada

Sat 8/29:20 amDUB - ONT

2 stops34h 54mAir Canada

Deal found 5/12

$813

Fri 7/2510:28 pmONT - DUB

1 stop23h 02mAmerican Airlines

Mon 8/411:45 amDUB - ONT

1 stop19h 12mAmerican Airlines

Deal found 5/10

$846

Best flights from Ontario to Dublin
Discover carefully curated flight deals from Ontario to Dublin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 12, 2025.

Wed 10/2910:40 amONT - DUB

2 stops16h 25mUnited Airlines

Fri 11/79:00 amDUB - ONT

2 stops19h 17mUnited Airlines

Deal found 5/11

$651

Wed 10/2912:00 pmONT - DUB

1 stop12h 45mDelta

Fri 11/79:45 amDUB - ONT

1 stop20h 56mDelta

Deal found 5/11

$652

Wed 10/296:47 amONT - DUB

2 stops17h 28mMultiple Airlines

Thu 11/611:30 amDUB - ONT

2 stops18h 11mMultiple Airlines

Deal found 5/12

$656

Mon 5/2610:59 pmONT - DUB

1 stop25h 21mJetBlue

Wed 6/1111:30 amDUB - ONT

1 stop17h 41mJetBlue

Deal found 5/11

$666

Sun 10/2612:00 pmONT - DUB

1 stop12h 45mKLM

Mon 11/39:45 amDUB - ONT

1 stop20h 56mKLM

Deal found 5/11

$675

Sat 11/812:53 pmONT - DUB

1 stop34h 22mIberia

Sun 11/162:05 pmDUB - ONT

1 stop15h 55mIberia

Deal found 5/12

$703

Fri 7/254:45 pmONT - DUB

2 stops18h 35mBritish Airways

Mon 8/48:55 pmDUB - ONT

2 stops29h 13mBritish Airways

Deal found 5/10

$760

Fri 7/256:10 amONT - DUB

2 stops17h 35mAir Canada

Sat 8/29:20 amDUB - ONT

2 stops34h 54mAir Canada

Deal found 5/12

$813

Fri 7/2510:28 pmONT - DUB

1 stop23h 02mAmerican Airlines

Mon 8/411:45 amDUB - ONT

1 stop19h 12mAmerican Airlines

Deal found 5/10

$846

Last-minute flights from Ontario to Dublin
Discover last-minute flight deals from Ontario to Dublin. Data last updated May 12, 2025 and is based on user searches.

Sat 5/1711:51 amONT - DUB

2 stops15h 14mMultiple Airlines

Tue 5/202:15 pmDUB - ONT

2 stops16h 45mMultiple Airlines

Deal found 5/11

$1,895

Sun 5/185:05 amONT - DUB

2 stops18h 15mUnited Airlines

Mon 5/269:20 amDUB - ONT

2 stops21h 25mUnited Airlines

Deal found 5/12

$972

Mon 5/1912:45 pmONT - DUB

1 stop13h 00mAmerican Airlines

Wed 6/412:40 pmDUB - ONT

1 stop13h 56mAmerican Airlines

Deal found 5/11

$957

Mon 5/197:30 amONT - DUB

1 stop18h 15mIberia

Wed 6/412:40 pmDUB - ONT

1 stop19h 03mIberia

Deal found 5/12

$966

Thu 5/227:05 amONT - DUB

1 stop17h 40mKLM

Thu 5/2911:00 amDUB - ONT

1 stop16h 33mKLM

Deal found 5/11

$1,522

Sun 5/256:41 pmONT - DUB

2 stops29h 34mMultiple Airlines

Tue 8/59:20 amDUB - ONT

3 stops35h 12mMultiple Airlines

Deal found 5/11

$800

Sun 5/257:00 amONT - DUB

1 stop18h 45mUnited Airlines

Tue 8/59:20 amDUB - ONT

2 stops19h 34mUnited Airlines

Deal found 5/11

$804

Mon 5/2610:59 pmONT - DUB

1 stop25h 21mJetBlue

Wed 6/1111:30 amDUB - ONT

1 stop17h 41mJetBlue

Deal found 5/11

$666

Mon 5/2612:45 pmONT - DUB

1 stop13h 00mIberia

Mon 6/912:40 pmDUB - ONT

1 stop14h 21mIberia

Deal found 5/12

$876

Fri 5/302:44 pmONT - DUB

2 stops18h 31mBritish Airways

Wed 6/412:30 pmDUB - ONT

2 stops19h 13mBritish Airways

Deal found 5/11

$1,106

Mon 6/26:00 amONT - DUB

2 stops41h 45mAir Canada

Tue 6/109:20 amDUB - ONT

2 stops40h 19mAir Canada

Deal found 5/12

$921

Mon 6/27:05 amONT - DUB

1 stop17h 40mKLM

Tue 6/1011:00 amDUB - ONT

1 stop19h 25mKLM

Deal found 5/12

$956

One-way flights from Ontario to Dublin
Search for one-way flight options from Ontario to Dublin. Find affordable one-way fares based on user searches. Data last updated May 12, 2025.

Mon 8/1812:47 pmONT - DUB

1 stop12h 58mAmerican Airlines

Deal found 5/10

$469

Sun 8/107:05 amONT - DUB

1 stop17h 40mKLM

Deal found 5/12

$473

Sat 8/92:57 pmONT - DUB

1 stop34h 48mIberia

Deal found 5/11

$500

Tue 5/2710:59 pmONT - DUB

1 stop25h 21mJetBlue

Deal found 5/11

$518

Fri 7/258:15 amONT - DUB

2 stops17h 25mMultiple Airlines

Deal found 5/11

$522

Mon 7/147:00 amONT - DUB

2 stops16h 45mUnited Airlines

Deal found 5/12

$603

Thu 9/113:00 pmONT - DUB

2 stops16h 45mBritish Airways

Deal found 5/11

$610

Fri 6/206:32 pmONT - DUB

2 stops53h 13mAir Canada

Deal found 5/12

$815

Sat 6/1411:49 amONT - DUB

1 stop12h 56mAir France

Deal found 5/12

$902

Thu 8/147:00 amONT - DUB

2 stops19h 50mWestJet

Deal found 5/11

$2,245

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

7:00 am-7:00 am

2 stops17h 00m

Dublin

Wed 11/5

9:00 am-8:17 pm

2 stops19h 17m

$651

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

12:00 pm-7:45 am

1 stop12h 45m

Dublin

Wed 11/5

9:45 am-10:41 pm

1 stop20h 56m

$652

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

6:47 am-7:15 am

2 stops17h 28m

Dublin

Thu 11/6

11:30 am-9:41 pm

2 stops18h 11m

$656

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 5/26

10:59 pm-8:20 am

1 stop25h 21m

Dublin

Wed 6/11

11:30 am-9:11 pm

1 stop17h 41m

$666

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 10/26

12:00 pm-7:45 am

1 stop12h 45m

Dublin

Mon 11/3

9:45 am-10:41 pm

1 stop20h 56m

$675

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 11/8

12:53 pm-7:15 am

1 stop34h 22m

Dublin

Sun 11/16

2:05 pm-10:00 pm

1 stop15h 55m

$703

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 7/25

4:45 pm-7:20 pm

2 stops18h 35m

Dublin

Mon 8/4

8:55 pm-6:08 pm

2 stops29h 13m

$760

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 7/25

6:10 am-7:45 am

2 stops17h 35m

Dublin

Sat 8/2

9:20 am-12:14 pm

2 stops34h 54m

$813

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 7/25

10:28 pm-5:30 am

1 stop23h 02m

Dublin

Mon 8/4

11:45 am-10:57 pm

1 stop19h 12m

$846

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 8/18

12:47 pm-9:45 am

1 stop12h 58m

$469

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/10

Showing 1-10 of 19 results

Compare providers for flights from Ontario to Dublin

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Dublin in May.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
Justfly.com	Price Accuracy3 stars	Trust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ontario-Dublin flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ontario-Dublin flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Ontario-Dublin flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Dublin flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Dublin flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Dublin

Have a flexible travel schedule? Discover the best time to fly to Dublin 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 Dublin

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

Currently, November is the cheapest month in which you can book a flight from Ontario to Dublin (average of $509). Flying from Ontario to Dublin in June is currently the most expensive (average of $970). 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 DUB?

One of the essential ways to save on airfare from Ontario to Dublin is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 6% on airfare.

Rainfall in Dublin by month

In terms of precipitation, rainfall in Dublin 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 Dublin when rainfall is around 1.9 in.

Temperature in Dublin by month

If weather is an important factor for your trip to Dublin, 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).

Reviews of airlines servicing Dublin

See what other customers who have flown with Delta, KLM and Air France from Ontario to Dublin have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,950 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

8.0

Very good

7,950 reviews

Delta

8.0

Very good

7,950 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.

KLM

7.8

Good

1,342 reviews

Delta

8.0

Very good

7,950 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.

Air France

7.5

Good

1,450 reviews

Delta

8.0

Very good

7,950 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.

United Airlines

7.4

Good

8,724 reviews

Delta

8.0

Very good

7,950 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.

JetBlue

7.3

Good

2,924 reviews

Delta

8.0

Very good

7,950 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 are the cheapest airlines flying from Ontario to Dublin round-trip?
Cheapflights users have booked flights from Ontario to Dublin round-trip from $651. Other airlines that can offer you cheap pricing are Delta, from $652, and JetBlue, from $666. Users have found that United Airlines is 16% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Ontario to Dublin one-way?
One-way options have recently been found by users for as low as $469 on American Airlines. Other airlines that offer cheap prices include KLM from $473 and Iberia from $500 one-way.
Can I find deals for flights from Ontario to Dublin that include hotel bookings?
Yes. In addition to deals on Ontario to Dublin flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Dublin?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Dublin.
Can I find deals for business class flights from Ontario to Dublin?
Yes. Cheapflights offers flight deals from Ontario to Dublin 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 Dublin?
Currently, November is the cheapest month in which you can book a flight from Ontario to Dublin (average of $509). Flying from Ontario to Dublin in June is currently the most expensive (average of $970). 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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Other flights to Dublin

Top 5 airlines flying from Ontario to Dublin

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$507	Average$572	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$527	Average$861	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$557	Average$938	FlexibilityNo cancel fee	On-time71%
Iberia	Cheapest$580	Average$786	FlexibilityNo cancel fee	On-time77%
KLM	Cheapest$607	Average$893	FlexibilityNo cancel fee	On-time75%

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$469+ Cheap flights from Ontario (ONT) to Dublin (DUB)

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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Dublin with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Dublin

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Dublin

Cheapest flights from Ontario to DublinExplore the most affordable flight options available from Ontario to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 12, 2025.

Explore the most affordable flight options available from Ontario to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 12, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from Ontario to Dublin

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Dublin in May.

Best time to book a flight from Ontario to Dublin

Have a flexible travel schedule? Discover the best time to fly to Dublin from Ontario with our price prediction graph.

Cheapflights Insights

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

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

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

Find hourly flight availability from Ontario to Dublin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 12, 2025.

Rainfall in Dublin by month

Plan your trip to Dublin by taking into account the average rainfall totals by month.

Temperature in Dublin by month

Plan your trip to Dublin by taking into account the average temperature totals by month.

Reviews of airlines servicing Dublin

Get insights into the airlines that provide service to Dublin. 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 Dublin. Reviews last updated May 12, 2025.

See what other customers who have flown with Delta, KLM and Air France from Ontario to Dublin have to say. Users can see the overall rating for each airline as well as how each is rated in terms of 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 Dublin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from Ontario to Dublin round-trip?

What are the cheapest airlines to fly from Ontario to Dublin one-way?

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

How can I find direct flights from Ontario to Dublin?

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

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

Traveling to a place near Ontario?

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Alternative routes for Ontario to Dublin

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Ontario to Dublin

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Cheapest flights from Ontario to Dublin
Explore the most affordable flight options available from Ontario to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 12, 2025.