Cheap Flights from Ontario International to Dublin

Compare Ontario International to Dublin flight deals

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Flight deals from Ontario International to Dublin

Looking for a cheap last-minute deal or the best return flight from Ontario International Airport to Dublin Airport? If you want to travel next month, return fares start from $1,489. Find the lowest prices on one-way and return tickets right here.

Dublin.$1,489 per passenger.Departing Mon, 7 Sep, returning Thu, 17 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Mon, 7 Sep, arriving in Dublin.Inbound indirect flight with Delta, departs from Dublin on Thu, 17 Sep, arriving in Ontario International.Price includes taxes and charges.From $1,489, select.

Dublin.$1,495 per passenger.Departing Wed, 31 Mar, returning Wed, 14 Apr.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Wed, 31 Mar, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Wed, 14 Apr, arriving in Ontario International.Price includes taxes and charges.From $1,495, select.

Dublin.$1,495 per passenger.Departing Sun, 2 May, returning Tue, 11 May.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Sun, 2 May, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Tue, 11 May, arriving in Ontario International.Price includes taxes and charges.From $1,495, select.

Dublin.$1,495 per passenger.Departing Tue, 13 Apr, returning Fri, 23 Apr.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Tue, 13 Apr, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Fri, 23 Apr, arriving in Ontario International.Price includes taxes and charges.From $1,495, select.

Dublin.$1,501 per passenger.Departing Tue, 3 Nov, returning Tue, 10 Nov.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Tue, 3 Nov, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Tue, 10 Nov, arriving in Ontario International.Price includes taxes and charges.From $1,501, select.

Dublin.$1,505 per passenger.Departing Wed, 28 Oct, returning Wed, 4 Nov.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Wed, 28 Oct, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Wed, 4 Nov, arriving in Ontario International.Price includes taxes and charges.From $1,505, select.

Dublin.$1,510 per passenger.Departing Wed, 26 Aug, returning Wed, 2 Sep.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Wed, 26 Aug, arriving in Dublin.Inbound indirect flight with United, departs from Dublin on Wed, 2 Sep, arriving in Ontario International.Price includes taxes and charges.From $1,510, select.

Dublin.$1,521 per passenger.Departing Tue, 27 Apr, returning Tue, 11 May.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Tue, 27 Apr, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Tue, 11 May, arriving in Ontario International.Price includes taxes and charges.From $1,521, select.

Dublin.$1,631 per passenger.Departing Wed, 14 Oct, returning Fri, 23 Oct.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Wed, 14 Oct, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Fri, 23 Oct, arriving in Ontario International.Price includes taxes and charges.From $1,631, select.

Dublin.$1,631 per passenger.Departing Tue, 29 Sep, returning Tue, 6 Oct.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Tue, 29 Sep, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Tue, 6 Oct, arriving in Ontario International.Price includes taxes and charges.From $1,631, select.

Dublin.$1,710 per passenger.Departing Tue, 18 Aug, returning Sat, 29 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Tue, 18 Aug, arriving in Dublin.Inbound indirect flight with Delta, departs from Dublin on Sat, 29 Aug, arriving in Ontario International.Price includes taxes and charges.From $1,710, select.

Dublin.$1,710 per passenger.Departing Mon, 31 Aug, returning Fri, 27 Nov.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Mon, 31 Aug, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Fri, 27 Nov, arriving in Ontario International.Price includes taxes and charges.From $1,710, select.

Dublin.$1,796 per passenger.Departing Sun, 30 Aug, returning Fri, 9 Oct.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Sun, 30 Aug, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Fri, 9 Oct, arriving in Ontario International.Price includes taxes and charges.From $1,796, select.

Dublin.$1,796 per passenger.Departing Tue, 25 May, returning Tue, 8 Jun.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Tue, 25 May, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Tue, 8 Jun, arriving in Ontario International.Price includes taxes and charges.From $1,796, select.

Dublin.$2,125 per passenger.Departing Thu, 3 Jun, returning Tue, 8 Jun.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Thu, 3 Jun, arriving in Dublin.Inbound indirect flight with Iberia, departs from Dublin on Tue, 8 Jun, arriving in Ontario International.Price includes taxes and charges.From $2,125, select.

Find the cheapest month to fly from Ontario International to Dublin

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

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Ontario International to Dublin: Alternative routes

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

Dublin

10km from central Dublin

ClosestCheapest

from $1,489

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Ontario to Dublin: Flight information

The things to know before you go.

Cheapest flight found	$1,489
Cheapest month to fly	September

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

How much are return flights from Ontario International to Dublin?

The best price we found for a return flight from Ontario International to Dublin is $1,489. 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 Ontario International to Dublin?

Currently, there are no airlines that fly direct from Ontario International to Dublin. But we found flights with one or more stops from $1,489.

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

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

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

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

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

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Dublin Airport on Monday, 7 September 2026.

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

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

How can I find the best flight deal to Dublin?

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 Dublin 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 Dublin?

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

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

Currently, Delta offers the cheapest flight tickets to Dublin.

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

Dublin's timezone is UTC+0, making Dublin eight hours ahead of Ontario.
Arrive at the airport on time so you don't miss your ONT to DUB flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.
During popular months such as July, it's a good idea to get to the airport even earlier. Plan to arrive two hours before domestic departures and four hours ahead for international flights when you fly during a peak period in general.
We make it easy to book a flight with a stopover. To see your options for tickets from Ontario International Airport to Dublin Airport, uncheck 'Direct flights only.' Then, pick a flight with a stop long enough to visit your chosen city. Popular stopovers between ONT and DUB include:
- Atlanta Hartsfield-Jackson Airport
- Dallas Fort Worth International Airport
- Seattle / Tacoma International Airport

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

The lowest price we've seen for a one-way Ontario International Airport to Dublin Airport flight is $653. A round-trip ticket is currently $1,489. Depending on the availability when you book, these fares may change.
It's usually best to book as early as possible if you want to get cheap tickets from ONT to DUB. That's because airlines adjust prices based on demand, which tends to increase closer to the date of departure.
The 'Whole month' search function shows you the cheapest flights from Ontario International Airport to Dublin Airport across every month. It's an easy way to snap up a bargain if your dates aren't set in stone.
Cut down on the time spent looking for cheap flights from ONT to DUB by setting up a Price Alert. You'll get an email or notification through the app when a special offer becomes available.
Select your preferred arrival and departure times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to find the best deals on flights from Ontario International Airport to Dublin Airport.

Handy information about Ontario International Airport (ONT)

You'll find ONT at 2900 E. Airport Drive.
83% of flights leaving Ontario International Airport arrive at their destination according to schedule. Given its strong on-time stats, delays are unlikely when setting off from ONT.
To reach Ontario International Airport from central Ontario, it'll take about 15 minutes if you're going by car. This depends on traffic though. It's approximately 10 kilometres from the airport to the city centre.
Planning to catch public transport? Expect a journey time of around 45 minutes.
Looking for a handy hotel close to ONT? If you're boarding an early flight from Ontario International Airport to Dublin Airport, these accommodation options will have you moments from your departure gate:

Arriving at Dublin Airport (DUB)

The last thing you want is a lengthy trip to your hotel if you're landing late on a Ontario International Airport to Dublin Airport flight. Reserve one of these accommodation options near DUB instead:
Follow your own route with a Dublin Airport rental car. Book your wheels from Easirent, Budget or Carhire and see more of Dublin and beyond.
Booking your vehicle from Dublin Airport around two weeks ahead increases your chances of getting a good deal.

Getting from Dublin Airport (DUB) to central Dublin

Dublin Airport to central Dublin has a drive time of about 25 minutes. It's approximately 11 kilometres away.
It'll take around 30 minutes if you're travelling on public transport.

When to fly to Dublin Airport (DUB)

July is the most popular month for flights from Ontario International Airport to Dublin Airport. For smaller crowds, travel to Dublin in March.
Before locking in your flight from Ontario International Airport to Dublin Airport, think about the kind of weather you enjoy. July is the warmest month in Dublin, with temperatures ranging from 10ºC to 19ºC.
January sees average temperatures of between 2ºC and 9ºC. Look for cheap tickets from ONT to DUB around that time if you want to travel when it's cooler.

Explore more of Ireland

Cork is just one of the many cities in Ireland waiting to be explored once you've seen Dublin. Around 225 kilometres away to the south-west, top sights here include Blarney Castle & Gardens, Blarney Castle House(Teach Caisleán na Blarnan) and Blarney Stone.