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$598+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — ONT
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$598
(Iberia)

Popular in

July

Cheapest in

February

Average price

$864
From Dublin to Ontario
Search Deals
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 ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 3, 2025.

This Iberia deal was found by Cheapflights users on 7/3. 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 9/1312:40 pmDUB - ONT
1 stop17h 53mIberia
Sat 9/278:15 amONT - DUB
1 stop17h 30mIberia
Deal found 7/3$598
This Delta deal was found by Cheapflights users on 7/2. 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.
Mon 11/105:55 amDUB - ONT
2 stops19h 22mDelta
Sun 11/1610:59 pmONT - DUB
1 stop24h 46mDelta
Deal found 7/2$695
This TravelUp deal was found by Cheapflights users on 7/2. 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 8/1812:40 pmDUB - ONT
1 stop13h 44mMultiple Airlines
Mon 9/112:47 pmONT - DUB
1 stop12h 58mMultiple Airlines
Deal found 7/2$708
This KLM deal was found by Cheapflights users on 7/3. 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.
Tue 9/2311:00 amDUB - ONT
1 stop19h 23mKLM
Wed 10/297:00 amONT - DUB
1 stop17h 45mKLM
Deal found 7/3$742
This JetBlue deal was found by Cheapflights users on 7/1. 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.
Mon 8/2511:30 amDUB - ONT
1 stop18h 29mJetBlue
Sun 9/710:56 pmONT - DUB
1 stop25h 24mJetBlue
Deal found 7/1$801
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Mon 8/259:20 amDUB - ONT
2 stops19h 23mUnited Airlines
Sat 9/67:00 amONT - DUB
2 stops16h 20mUnited Airlines
Deal found 7/1$802
This American Airlines deal was found by Cheapflights users on 7/3. 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.
Sun 8/1712:40 pmDUB - ONT
1 stop35h 26mAmerican Airlines
Sun 8/246:10 amONT - DUB
1 stop19h 35mAmerican Airlines
Deal found 7/3$837
This Gotogate deal was found by Cheapflights users on 7/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/178:35 amDUB - ONT
2 stops18h 18mBritish Airways
Mon 7/214:45 pmONT - DUB
2 stops17h 35mBritish Airways
Deal found 7/2$878
This Air Canada deal was found by Cheapflights users on 7/2. 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.
Mon 8/259:20 amDUB - ONT
3 stops35h 12mAir Canada
Mon 9/15:10 amONT - DUB
3 stops18h 35mAir Canada
Deal found 7/2$965

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 July 3, 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

Sat 9/13

12:40 pm-10:33 pm

1 stop17h 53m

Ontario

Sat 9/27

8:15 am-9:45 am

1 stop17h 30m

$598

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 11/10

5:55 am-5:17 pm

2 stops19h 22m

Ontario

Sun 11/16

10:59 pm-7:45 am

1 stop24h 46m

$695

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 8/18

12:40 pm-6:24 pm

1 stop13h 44m

Ontario

Mon 9/1

12:47 pm-9:45 am

1 stop12h 58m

$708

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 9/23

11:00 am-10:23 pm

1 stop19h 23m

Ontario

Wed 10/29

7:00 am-7:45 am

1 stop17h 45m

$742

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 8/25

11:30 am-9:59 pm

1 stop18h 29m

Ontario

Sun 9/7

10:56 pm-8:20 am

1 stop25h 24m

$801

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 8/25

9:20 am-8:43 pm

2 stops19h 23m

Ontario

Sat 9/6

7:00 am-7:20 am

2 stops16h 20m

$802

DublinOntario

DUB - ONT

DUBONT

Dublin

Sun 8/17

12:40 pm-4:06 pm

1 stop35h 26m

Ontario

Sun 8/24

6:10 am-9:45 am

1 stop19h 35m

$837

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 7/17

8:35 am-6:53 pm

2 stops18h 18m

Ontario

Mon 7/21

4:45 pm-6:20 pm

2 stops17h 35m

$878

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 8/25

9:20 am-12:32 pm

3 stops35h 12m

Ontario

Mon 9/1

5:10 am-7:45 am

3 stops18h 35m

$965

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 8/15

11:30 am-10:10 pm

1 stop18h 40m

$623

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 14 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.

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 July 3, 2025.
Read through reviews of airlines operating flights from Dublin to Ontario, such as Delta, KLM, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
2,916 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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 Iberia is currently your cheapest option to Ontario, with prices starting at $598. Additional round-trip tickets that might be worth considering are offered by Delta and KLM, with the lowest prices starting at $695 and $742, 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 $623. 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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