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$540+ Cheap flights from Dublin (DUB) 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
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 April 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$600
(United Airlines)

One-way from

$540
(JetBlue)

Popular in

July

Cheapest in

February

Average price

$649
Provider with most accurate pricing for Dublin-Ontario flight deals.
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Provider most trusted by Cheapflights users for Dublin-Ontario flights.
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From Dublin to Ontario
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One-way flight from Dublin 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 April 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 April 15, 2025.

This United Airlines deal was found by Cheapflights users on 4/14. 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 4/249:50 amDUB - ONT
2 stops18h 52mUnited Airlines
Fri 5/26:00 amONT - DUB
2 stops20h 20mUnited Airlines
Deal found 4/14$599
This Delta deal was found by Cheapflights users on 4/14. 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.
Tue 4/295:55 amDUB - ONT
2 stops18h 49mDelta
Sat 5/310:15 pmONT - DUB
2 stops25h 40mDelta
Deal found 4/14$606
This Air France deal was found by Cheapflights users on 4/15. 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.
Wed 4/301:20 pmDUB - ONT
2 stops18h 21mKLM
Sun 5/410:15 pmONT - DUB
1 stop26h 30mKLM
Deal found 4/15$607
This Air Canada deal was found by Cheapflights users on 4/14. 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.
Wed 5/149:20 amDUB - ONT
2 stops19h 14mAir Canada
Sun 6/15:10 amONT - DUB
2 stops19h 05mAir Canada
Deal found 4/14$611
This Iberia deal was found by Cheapflights users on 4/14. 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.
Sat 9/612:40 pmDUB - ONT
1 stop17h 16mIberia
Sat 9/2010:54 amONT - DUB
1 stop14h 51mIberia
Deal found 4/14$614
This American Airlines deal was found by Cheapflights users on 4/14. 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.
Mon 4/2111:45 amDUB - ONT
1 stop17h 14mAmerican Airlines
Mon 5/510:51 amONT - DUB
1 stop14h 54mAmerican Airlines
Deal found 4/14$615
This lol.travel deal was found by Cheapflights users on 4/14. 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.
Wed 4/3010:55 amDUB - ONT
2 stops19h 03mBritish Airways
Sun 5/47:00 amONT - DUB
2 stops18h 40mBritish Airways
Deal found 4/14$640
This TravelUp deal was found by Cheapflights users on 4/14. 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 4/2112:40 pmDUB - ONT
1 stop13h 49mMultiple Airlines
Sun 5/412:50 pmONT - DUB
1 stop12h 55mMultiple Airlines
Deal found 4/14$693
This Ticket deal was found by Cheapflights users on 4/13. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/296:00 amDUB - ONT
2 stops18h 17mAir France
Thu 6/510:01 amONT - DUB
2 stops13h 54mAir France
Deal found 4/13$739

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 April 15, 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

Wed 4/30

9:50 am-8:42 pm

2 stops18h 52m

Ontario

Sun 5/4

6:00 am-11:10 am

2 stops21h 10m

$600

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 4/29

5:55 am-4:44 pm

2 stops18h 49m

Ontario

Sat 5/3

10:15 pm-7:55 am

2 stops25h 40m

$606

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 4/30

1:20 pm-11:41 pm

2 stops18h 21m

Ontario

Sun 5/4

10:15 pm-8:45 am

1 stop26h 30m

$607

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 5/14

9:20 am-8:34 pm

2 stops19h 14m

Ontario

Sun 6/1

5:10 am-8:15 am

2 stops19h 05m

$611

DublinOntario

DUB - ONT

DUBONT

Dublin

Sat 9/6

12:40 pm-9:56 pm

1 stop17h 16m

Ontario

Sat 9/20

10:54 am-9:45 am

1 stop14h 51m

$614

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 4/29

12:40 pm-9:58 pm

2 stops17h 18m

Ontario

Sat 5/3

10:40 pm-5:30 am

1 stop22h 50m

$615

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 4/30

10:55 am-9:58 pm

2 stops19h 03m

Ontario

Sun 5/4

7:00 am-9:40 am

2 stops18h 40m

$640

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 5/29

11:00 am-10:29 pm

1 stop19h 29m

Ontario

Thu 6/5

7:05 am-8:45 am

1 stop17h 40m

$734

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 5/29

6:00 am-4:17 pm

2 stops18h 17m

Ontario

Thu 6/5

10:01 am-7:55 am

2 stops13h 54m

$739

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 5/8

11:30 am-9:11 pm

1 stop17h 41m

$540

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 19 results
1
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Compare providers for flights from Dublin to Ontario

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 Dublin to Ontario in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 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 Dublin-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Dublin-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Dublin-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Dublin-Ontario flights, Cheapflights users trust eDreams the most. eDreams 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 Dublin-Ontario 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 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 April 15, 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
7,918 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
7,918 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
1,323 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
1,435 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
8,658 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
2,927 reviews
Delta
8.0
Very good
7,918 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

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 United Airlines is currently your cheapest option to Ontario, with prices starting at $600. Additional round-trip tickets that might be worth considering are offered by Delta and KLM, with the lowest prices starting at $606 and $607, 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 $540. However, be on the lookout for offers from Iberia 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.

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