How long is the flight to Ontario?

The duration of your flight to Ontario depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular routes to Ontario on KAYAK are from Dublin , which takes 11h 00m, Milltown (Kerry) , which takes 16h 05m, Cork , which takes 26h 30m, and Shannon , which takes 27h 15m.

How long is the flight to Ontario?

The duration of your flight to Ontario depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular routes to Ontario on KAYAK are from Dublin , which takes 11h 00m, Milltown (Kerry) , which takes 16h 05m, Cork , which takes 26h 30m, and Shannon , which takes 27h 15m.

How far is Ontario Airport from central Ontario?

The city centre of Ontario is 5 km from Ontario. Visit our flight page for the latest deals!>/a>

What is the name of Ontario’s airport?

When flying to Ontario, you'll arrive at Ontario Airport (ONT). The airport is also known as Ontario or Ontario Intl. Visit our flight page for the latest deals!>/a>

How does KAYAK find such low prices on flights to Ontario?

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. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket 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 travellers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights to Ontario?

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. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Ontario?

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. Visit our flight page for the latest deals!>/a>

What is the cheapest time of day to fly to Ontario?

The cheapest time of day to fly to Ontario is generally in the morning, when flights cost €630 on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is €630.

€561 CHEAP FLIGHTS to Ontario in 2025/26

ONT

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

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Cheapest return fare

€594

United Airlines

Wed 4/3Sun 8/3

DUB - ONT • 2 stops

Cheapest one-way flight

€561

Iberia

Fri 24/4

DUB - ONT • 1 stop

Start a new search

KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you love your trip to Ontario!

Flight Deals

Cheap Flights to Ontario

Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

All Flight Deals

Recent return flight deals to Ontario

Wed, 4 Mar - Sun, 8 Mar

09:00 - 22:57

DUB

ONT

21h 57m2 stops

23:59 - 08:10

ONT

DUB

25h 11m1 stop

€594United Airlines

Wed, 4 Mar - Sun, 8 Mar

09:00 - 22:57

DUB

ONT

21h 57m2 stops

23:59 - 08:10

ONT

DUB

25h 11m1 stop

€595United Airlines

Mon, 12 Jan - Sun, 25 Jan

13:00 - 10:08

DUB

ONT

29h 08m2 stops

16:45 - 16:50

ONT

DUB

16h 05m2 stops

€599American Airlines

Wed, 6 May - Wed, 13 May

13:45 - 21:56

DUB

ONT

16h 11m1 stop

11:01 - 09:45

ONT

DUB

14h 44m1 stop

€622Iberia

Wed, 24 Dec - Sun, 28 Dec

12:05 - 12:38

DUB

ONT

32h 33m2 stops

23:59 - 08:10

ONT

DUB

24h 11m1 stop

€649United Airlines

Fri, 15 May - Sun, 17 May

11:45 - 22:09

DUB

ONT

18h 24m1 stop

23:25 - 09:00

ONT

DUB

25h 35m1 stop

€650JetBlue

Thu, 7 May - Thu, 14 May

11:45 - 22:09

DUB

ONT

18h 24m1 stop

23:25 - 09:00

ONT

DUB

25h 35m1 stop

€652JetBlue

Fri, 15 May - Fri, 29 May

11:35 - 22:26

DUB

ONT

18h 51m1 stop

07:00 - 07:45

ONT

DUB

16h 45m2 stops

€655United Airlines

Fri, 26 Dec - Tue, 30 Dec

12:55 - 08:48

DUB

ONT

27h 53m2 stops

22:40 - 12:15

ONT

DUB

29h 35m2 stops

€664American Airlines

Fri, 26 Dec - Sat, 17 Jan

10:40 - 22:25

DUB

ONT

19h 45m1 stop

05:05 - 07:30

ONT

DUB

18h 25m2 stops

€678United Airlines

Booking Insights

KAYAK's insights & trends for flights to Ontario

Get data-powered insights and trends into flights to Ontario to help you find the cheapest flights, the best time to fly and much more.

Airlines

The most popular airline among KAYAK users flying to Ontario is Aer Lingus, followed by British Airways and United Airlines.

Cheapest flight	€561

Flight from Dublin to Ontario

When to book flights to Ontario

Are your dates flexible? Find out the best times to travel to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated return price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. The information is for flights to Ontario based on your location. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

How far is Ontario Airport from central Ontario?
The city centre of Ontario is 5 km from Ontario.
What is the name of Ontario’s airport?
When flying to Ontario, you'll arrive at Ontario Airport (ONT). The airport is also known as Ontario or Ontario Intl.
How does KAYAK find such low prices on flights to Ontario?
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.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket 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 travellers know whether to wait or book now.
What is the Hacker Fare option on flights to Ontario?
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.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Ontario?
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.
What is the cheapest time of day to fly to Ontario?
The cheapest time of day to fly to Ontario is generally in the morning, when flights cost €630 on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is €630.

Enter your preferred departure airport and travel dates into the search form above to unlock the latest Ontario flight deals.

Direct departures

Ireland to Ontario

Monday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Tuesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Wednesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Thursday

Aeromexico, Air Canada, Alaska Airlines, +21 more

Aeromexico, Air Canada, +22 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

See more direct flights

Direct returns

Ontario to Ireland

Monday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Tuesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Wednesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Thursday

Aeromexico, Air Canada, Alaska Airlines, +21 more

Aeromexico, Air Canada, +22 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

See more direct flights

Everything you need to know for your flight to Ontario

Airports

Cabin class

Complete your trip

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Ontario

Ontario (ONT)

ONT

€561 Find Cheap Flights to Ontario

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

Everything you should know

Cheap Flights to Ontario

Recent return flight deals to Ontario

Recent one-way flight deals to Ontario

Recent last minute flight deals to Ontario

All return flight deals to Ontario

KAYAK's insights & trends for flights to Ontario

Get data-powered insights and trends into flights to Ontario to help you find the cheapest flights, the best time to fly and much more.

What are the most popular airlines flying to Ontario?

The most popular airline among KAYAK users flying to Ontario is Aer Lingus, followed by British Airways and United Airlines.

How long is the flight to Ontario?

Good to know – Book Cheap Ontario Plane Tickets

When to book flights to Ontario

FAQs - booking Ontario flights

How far is Ontario Airport from central Ontario?

The city centre of Ontario is 5 km from Ontario.

What is the name of Ontario’s airport?

When flying to Ontario, you'll arrive at Ontario Airport (ONT). The airport is also known as Ontario or Ontario Intl.

How does KAYAK find such low prices on flights to Ontario?

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.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket 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 travellers know whether to wait or book now.

What is the Hacker Fare option on flights to Ontario?

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.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Ontario?

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.

What is the cheapest time of day to fly to Ontario?

The cheapest time of day to fly to Ontario is generally in the morning, when flights cost €630 on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is €630.

Top tips for finding cheap flights to Ontario

Prefer to fly direct to Ontario?

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Cabin class types available on flights to Ontario

Complete your trip to Ontario with a hotel stay or car hire

Flights to other popular destinations

Flights from local origins to Ontario

Choose which airport to fly into in Ontario

Find deals for your return flight