$615 Find cheap flights from Ireland to Ontario

The city center of Ontario is 3 miles from Ontario.

There is only 1 airport in Ontario, called Ontario (ONT). It can also be referred to as Ontario or Ontario Intl.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Ontario.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back with another airline.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Of the 8 airlines that fly to Ontario, Southwest offers the most flights, with around 222 per week, followed by Frontier with 94 flights per week.