$595 Cheap Flights from Dublin (DUB) to Ontario (ONT)

View $595 flight on Mon, Mar 9, 2026Opens in a new window

Popular airlines from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Dublin to Ontario (DUB-ONT)

Prices were available within the past 7 days and start at $595 for one-way flights and $590 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Iberia
Mon, Apr 6 - Sat, Apr 18
DUB
Dublin
ONT
Ontario
$590 Roundtrip, found 19 hours ago
$590
Roundtrip
found 19 hours ago
Select Iberia flight, departing Mon, Apr 6 from Dublin to Ontario, returning Sat, Apr 18, priced at $590 found 19 hours ago
Iberia
Wed, Apr 22 - Wed, Apr 29
DUB
Dublin
ONT
Ontario
$592 Roundtrip, found 2 hours ago
$592
Roundtrip
found 2 hours ago
Select Iberia flight, departing Wed, Apr 22 from Dublin to Ontario, returning Wed, Apr 29, priced at $592 found 2 hours ago
Lufthansa
Sat, Feb 14 - Sat, Feb 21
DUB
Dublin
ONT
Ontario
$629 Roundtrip, found 15 hours ago
$629
Roundtrip
found 15 hours ago
Select Lufthansa flight, departing Sat, Feb 14 from Dublin to Ontario, returning Sat, Feb 21, priced at $629 found 15 hours ago
Lufthansa
Sat, Feb 14 - Sat, Feb 21
DUB
Dublin
ONT
Ontario
$631 Roundtrip, found 15 hours ago
$631
Roundtrip
found 15 hours ago
Select Lufthansa flight, departing Sat, Feb 14 from Dublin to Ontario, returning Sat, Feb 21, priced at $631 found 15 hours ago
Swiss International Air Lines
Sat, Feb 14 - Sat, Feb 21
DUB
Dublin
ONT
Ontario
$639 Roundtrip, found 15 hours ago
$639
Roundtrip
found 15 hours ago
Select Swiss International Air Lines flight, departing Sat, Feb 14 from Dublin to Ontario, returning Sat, Feb 21, priced at $639 found 15 hours ago
Swiss International Air Lines
Sat, Feb 14 - Sat, Feb 21
DUB
Dublin
ONT
Ontario
$640 Roundtrip, found 15 hours ago
$640
Roundtrip
found 15 hours ago
Select Swiss International Air Lines flight, departing Sat, Feb 14 from Dublin to Ontario, returning Sat, Feb 21, priced at $640 found 15 hours ago
Lufthansa
Sat, Feb 14 - Sat, Feb 21
DUB
Dublin
ONT
Ontario
$650 Roundtrip, found 15 hours ago
$650
Roundtrip
found 15 hours ago
Select Lufthansa flight, departing Sat, Feb 14 from Dublin to Ontario, returning Sat, Feb 21, priced at $650 found 15 hours ago
Lufthansa
Sat, Feb 14 - Sat, Feb 21
DUB
Dublin
ONT
Ontario
$652 Roundtrip, found 15 hours ago
$652
Roundtrip
found 15 hours ago
Select Lufthansa flight, departing Sat, Feb 14 from Dublin to Ontario, returning Sat, Feb 21, priced at $652 found 15 hours ago
KLM
Sat, Feb 14 - Sat, Feb 21
DUB
Dublin
ONT
Ontario
$668 Roundtrip, found 15 hours ago
$668
Roundtrip
found 15 hours ago
Select KLM flight, departing Sat, Feb 14 from Dublin to Ontario, returning Sat, Feb 21, priced at $668 found 15 hours ago
Air France
Sat, Feb 14 - Sat, Feb 21
DUB
Dublin
ONT
Ontario
$681 Roundtrip, found 15 hours ago
$681
Roundtrip
found 15 hours ago
Select Air France flight, departing Sat, Feb 14 from Dublin to Ontario, returning Sat, Feb 21, priced at $681 found 15 hours ago

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Flights from Dublin (DUB) to Ontario (ONT)
Origin airport
Dublin
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
American Airlines, British Airways, Delta, Iberia, KLM, United
Roundtrip price
$590
Distance
5135 mi

Dublin to Ontario Flights

The cheapest times to fly from Dublin to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Dublin to Ontario are during the month of April. You can find some of the cheapest flights from Dublin to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Dublin to Ontario

Sunday is one of the best days to book for cheap flights from Dublin to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Dublin to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Dublin to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $595 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Dublin to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Dublin to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Snag a cheap one-way flight from $595 or cheap return flight from $590 from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT)?
Flying in April is a good way to save, as it's the cheapest month for flights between DUB and ONT. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from DUB to ONT. Then, sort your results by "Price (lowest to highest)" to snag a good deal.
How many flights per day from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT)?
You'll need to take a flight with a layover if you're traveling from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from DUB to ONT?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT)?
To touch down at Los Angeles - Ontario Intl. Airport (ONT) without delays, opt for a flight that takes off from Dublin Airport (DUB) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Ontario from Dublin Airport (DUB)?
Los Angeles Intl. Airport (LAX) is the only airport in Ontario with direct flights from Dublin Airport (DUB). Consider the options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Booking your ticket from DUB to ONT right before your trip is usually more expensive. But if you're flexible with your departure dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a DUB to ONT flight and hotel package?
You'll generally save money by securing a DUB to ONT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've chosen your preferred accommodations and flights, consider other add-ons like car rentals, activities and tours.
Can I cancel or change the date of my flight from Dublin Airport (DUB) to Los Angeles - Ontario Intl. Airport (ONT)?
If you reserved your DUB to ONT flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

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*Available to One Key members.