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$549+ Cheap flights from Dublin (DUB) to Ontario (ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Dublin to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Dublin (DUB) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$549
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$790
From Dublin to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($145 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Dublin to Ontario

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

This American Airlines deal was found by Cheapflights users on 6/11. 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 9/268:35 amDUB - ONT
2 stops18h 19mAmerican Airlines
Sat 10/41:10 pmONT - DUB
2 stops19h 30mAmerican Airlines
Deal found 6/11$549
This United Airlines deal was found by Cheapflights users on 6/11. 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 9/49:50 amDUB - ONT
2 stops20h 40mUnited Airlines
Fri 9/127:00 amONT - DUB
2 stops40h 10mUnited Airlines
Deal found 6/11$553
This Iberia deal was found by Cheapflights users on 6/11. 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.
Wed 6/1812:40 pmDUB - ONT
1 stop19h 19mIberia
Mon 6/2312:49 pmONT - DUB
1 stop12h 56mIberia
Deal found 6/11$578
This TravelUp deal was found by Cheapflights users on 6/10. 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.
Wed 6/258:30 amDUB - ONT
2 stops21h 08mBritish Airways
Sun 6/294:50 pmONT - DUB
2 stops18h 45mBritish Airways
Deal found 6/10$593
This Finnair deal was found by Cheapflights users on 6/10. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/12:05 pmDUB - ONT
1 stop14h 55mMultiple Airlines
Fri 11/148:46 amONT - DUB
1 stop14h 29mMultiple Airlines
Deal found 6/10$607
This Delta deal was found by Cheapflights users on 6/11. 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.
Thu 11/135:55 amDUB - ONT
2 stops19h 22mDelta
Wed 12/37:00 amONT - DUB
2 stops17h 45mDelta
Deal found 6/11$676
This Air Canada deal was found by Cheapflights users on 6/10. 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.
Thu 6/199:20 amDUB - ONT
2 stops43h 44mAir Canada
Wed 10/11:53 pmONT - DUB
2 stops33h 52mAir Canada
Deal found 6/10$697
This KLM deal was found by Cheapflights users on 6/12. 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 6/1911:00 amDUB - ONT
1 stop16h 54mKLM
Fri 7/47:05 amONT - DUB
1 stop17h 40mKLM
Deal found 6/12$766
This JetBlue deal was found by Cheapflights users on 6/10. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/111:30 amDUB - ONT
1 stop18h 39mJetBlue
Sat 8/211:59 pmONT - DUB
1 stop24h 21mJetBlue
Deal found 6/10$895
This Air France deal was found by Cheapflights users on 6/12. 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.
Sat 7/2611:00 amDUB - ONT
1 stop16h 20mAir France
Sat 8/1611:45 amONT - DUB
1 stop13h 00mAir France
Deal found 6/12$1,103

Cheapflights Fare Finder

Customize your flight search to find flights from Dublin 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 June 12, 2025.
Use the filters below to find and compare flights from Dublin to Ontario that are best for you.

Fly from

Dublin

Fly to

Ontario

Route

Depart

Return

Price

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 9/26

8:35 am-6:54 pm

2 stops18h 19m

Ontario

Sat 10/4

1:10 pm-4:40 pm

2 stops19h 30m

$549

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 9/4

9:50 am-10:30 pm

2 stops20h 40m

Ontario

Fri 9/12

7:00 am-7:10 am

2 stops40h 10m

$553

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 6/25

8:30 am-9:38 pm

2 stops21h 08m

Ontario

Sun 6/29

4:50 pm-7:35 pm

2 stops18h 45m

$593

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 11/1

2:05 pm-10:00 pm

1 stop14h 55m

Ontario

Fri 11/14

8:46 am-7:15 am

1 stop14h 29m

$607

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 9/13

12:40 pm-7:00 pm

1 stop14h 20m

Ontario

Sat 9/27

8:15 am-9:45 am

1 stop17h 30m

$631

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 11/13

5:55 am-5:17 pm

2 stops19h 22m

Ontario

Wed 12/3

7:00 am-8:45 am

2 stops17h 45m

$676

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 6/26

9:20 am-8:54 pm

2 stops43h 34m

Ontario

Wed 9/3

1:42 pm-7:45 am

2 stops34h 03m

$736

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 6/25

11:00 am-10:25 pm

1 stop19h 25m

Ontario

Wed 7/2

7:05 am-8:45 am

1 stop17h 40m

$848

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 8/1

11:30 am-10:09 pm

1 stop18h 39m

Ontario

Sat 8/2

11:59 pm-8:20 am

1 stop24h 21m

$895

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 7/26

11:00 am-7:20 pm

1 stop16h 20m

Ontario

Sat 8/16

11:45 am-8:45 am

1 stop13h 00m

$1,103

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 20 results
1
2

Best time to book a flight from Dublin to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Dublin to Ontario (average of $246). Flying from Dublin 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 June 12, 2025.
Read reviews from past customers who have flown Delta, KLM and Air France from Dublin to Ontario. 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
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
2,925 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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 Dublin to Ontario. 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 Dublin to Ontario round-trip?

    Flying on American Airlines is currently your cheapest option to Ontario, with prices starting at $549. Additional round-trip tickets that might be worth considering are offered by United Airlines and British Airways, with the lowest prices starting at $553 and $593, respectively.

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

    The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as $611. However, be on the lookout for offers from American Airlines and British Airways, as they are both options that can get you from Dublin to Ontario for a low price.

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

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

  • How can I find direct flights from Dublin to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Dublin 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 Dublin to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Dublin to Ontario (average of $246). Flying from Dublin 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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