Cheap Flights from Dublin (DUB) to Ontario International (ONT)

Compare Dublin to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Dublin to Ontario International

Looking for a cheap last-minute deal or the best return flight from Dublin Airport to Ontario International Airport? If you want to travel next month, return fares start from £460. Find the lowest prices on one-way and return tickets right here.

Ontario.£274 per passenger.Departing Thu, 28 May.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Dublin on Thu, 28 May, arriving in Ontario International.Price includes taxes and charges.From £274, select.

Ontario.£275 per passenger.Departing Tue, 2 Jun.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Dublin on Tue, 2 Jun, arriving in Ontario International.Price includes taxes and charges.From £275, select.

Ontario.£372 per passenger.Departing Mon, 27 Apr.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Dublin on Mon, 27 Apr, arriving in Ontario International.Price includes taxes and charges.From £372, select.

Ontario.£392 per passenger.Departing Thu, 1 Oct.One-way flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from Dublin on Thu, 1 Oct, arriving in Ontario International.Price includes taxes and charges.From £392, select.

Ontario.£409 per passenger.Departing Fri, 4 Sep.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from Dublin on Fri, 4 Sep, arriving in Ontario International.Price includes taxes and charges.From £409, select.

Ontario.£414 per passenger.Departing Mon, 31 Aug.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Dublin on Mon, 31 Aug, arriving in Ontario International.Price includes taxes and charges.From £414, select.

Ontario.£445 per passenger.Departing Thu, 9 Jul.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Dublin on Thu, 9 Jul, arriving in Ontario International.Price includes taxes and charges.From £445, select.

Ontario.£448 per passenger.Departing Sat, 9 Jan.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Dublin on Sat, 9 Jan, arriving in Ontario International.Price includes taxes and charges.From £448, select.

Ontario.£477 per passenger.Departing Tue, 3 Nov.One-way flight with Iberia.Outbound indirect flight with Iberia, departs from Dublin on Tue, 3 Nov, arriving in Ontario International.Price includes taxes and charges.From £477, select.

Ontario.£603 per passenger.Departing Wed, 2 Dec.One-way flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from Dublin on Wed, 2 Dec, arriving in Ontario International.Price includes taxes and charges.From £603, select.

Ontario.£1,281 per passenger.Departing Thu, 1 Apr.One-way flight with Etihad Airways.Outbound indirect flight with Etihad Airways, departs from Dublin on Thu, 1 Apr, arriving in Ontario International.Price includes taxes and charges.From £1,281, select.

Find the cheapest month to fly from Dublin to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Dublin to Ontario International flights are currently cheapest in May.

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Dublin to Ontario International: Alternative routes

Compare routes from Dublin to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

Dublin to Ontario: Flight information

The things to know before you go.

Cheapest flight found	£274
Cheapest month to fly	May

Finding cheap flights from Dublin to Ontario International: Frequently asked questions

How much are return flights from Dublin to Ontario International?

The best price we found for a return flight from Dublin to Ontario International is £450. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Dublin to Ontario International?

Currently, there are no airlines that fly direct from Dublin to Ontario International. But we found flights with one or more stops from £450.

How many flights are there a week from Dublin to Ontario International?

As of April 2026, there are no flights flying from Dublin to Ontario International.

When is the cheapest time to fly from Dublin to Ontario International?

The cheapest month to fly from Dublin to Ontario International is usually April.

Which upcoming date is cheapest to fly from Dublin Airport to Ontario International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Dublin Airport to Ontario International Airport on Friday, 24 April 2026.

Can I get a direct flight from Dublin Airport to Ontario International Airport?

No airlines currently offer direct flights between Dublin Airport and Ontario International Airport. Most routes have one or more stops.

How can I find the best flight deal to Ontario International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Ontario?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Dublin Airport to Ontario International with?

Currently, Iberia offers the cheapest flight tickets to Ontario International.

Travelling from Dublin Airport (DUB) to Ontario International Airport (ONT): what you need to know

The timezone in Ontario is UTC-7, which is seven hours behind Dublin.
Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules to live by. Be at the airport with enough time to catch your DUB to ONT flight.
Travelling during a peak time such as August? Major public holidays and other high seasons can mean longer lines at check-in and security. Be extra cautious and get there up to four hours ahead of international flights and two hours before a domestic departure.
If you'd like to break up your flight, just deselect 'Direct flights only' when searching for your ticket from Dublin Airport to Ontario International Airport. These are the top stopovers between DUB and ONT:
- Harry Reid Airport (formerly McCarran Airport)
- Denver International Airport
- Dallas/Fort Worth International Airport

How to find the cheapest flights from Dublin Airport (DUB) to Ontario International Airport (ONT)

Right now, £274 is the cheapest price we've found for a one-way Dublin Airport to Ontario International Airport flight. The best price for a return ticket is £450. Keep in mind that fares can change due to demand at the time of booking.
Don't wait until the last moment. You're more likely to find cheap tickets from DUB to ONT if you book in advance. Airlines often have some terrific early bird discounts.
If you can be flexible with your trip dates, try using the 'Whole month' search function. It'll find the lowest price across the month when searching for your flight from Dublin Airport to Ontario International Airport.
You don't need to check back in every day to find out if fares have dropped when you set up a Price Alert. We'll send you an update as soon as there's a better deal on cheap flights from DUB to ONT.
Secure the perfect flight for you by using the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Dublin Airport to Ontario International Airport, use the 'Sort by' tool. You can also filter results by arrival and departure times, airline, and number of stops.

Handy information about Dublin Airport (DUB)

Of all flights leaving Dublin Airport, 72.87% land on schedule at their destination.
Central Dublin to Dublin Airport is approximately 13 miles. Depending on traffic, it'll take you about 30 minutes to get there if you're ride-sharing, catching a cab or driving.
The journey when using public transport takes about 2 hours 10 minutes.
Get your trip off to a relaxed start by staying near DUB. Whether you're taking an early flight from Dublin Airport to Ontario International Airport or want to avoid feeling rushed, these hotels are ideal:

Arriving at Ontario International Airport (ONT)

The last thing you need is a long journey to your hotel if you're arriving on a late Dublin Airport to Ontario International Airport flight. Book one of these accommodation options near ONT instead:
Begin your adventure by picking up an Ontario International Airport rental car. Grab your wheels from Dollar, Fox - Rent A Car or Thrifty and explore beyond Ontario's main sights.
To get the best deal, book your ride from Ontario International Airport about three weeks before travelling.

Getting from Ontario International Airport (ONT) to central Ontario

You'll find ONT at 2900 E. Airport Drive.
Ontario International Airport is approximately 4 miles from central Ontario. The drive time takes around 10 minutes.
If you're taking public transport, expect a journey time of around 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

August is the most popular month for flights from Dublin Airport to Ontario International Airport. To steer clear of the crowds, head to Ontario in May.
Before locking in your flight from Dublin Airport to Ontario International Airport, think about the type of weather you like. August is the warmest month in Ontario, with the temperature ranging from 15ºC (59ºF) to 35ºC (95ºF).
January has average temperatures of between 4ºC (39ºF) and 23ºC (73ºF). Look for cheap tickets from DUB to ONT sometime around then if you like travelling in cooler conditions.

Explore more of United States

Ontario is always a good idea, but there are so many other parts of United States you should also see. About 35 miles west of Ontario, a trip to Los Angeles will keep your itinerary packed. Start with leading sights like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.
If you're ready to explore another great destination in United States, consider San Diego, roughly 95 miles south of Ontario. San Diego Zoo, USS Midway Museum and SeaWorld San Diego are among the biggest draws.