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 stopover will also be longer. The most popular routes to Ontario on KAYAK are from Dublin , which takes 11h 00m , Cork , which takes 13h 45m, Milltown (Kerry) , which takes 16h 05m, and Shannon , which takes 17h 14m.

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>

€423 CHEAP FLIGHTS to Ontario in 2025

ONT

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Cheap Flight Deals 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.

Round-trip

One-way

Last minute

All Flight Deals

Recent return flight deals to Ontario

Recommended return deals departing in the coming months from the most popular airlines that fly to Ontario.

Discover the best prices and deals for you by selecting your travel dates.

Choose your dates

10:45 - 22:45DUB-ONT

20h 00m2 stops

15:04 - 17:05ONT-DUB

18h 01m2 stops

€423British Airways

Find Deal

Fri, 7 Feb - Mon, 10 Feb

09:00 - 09:51DUB-ONT

32h 51m3 stops

06:00 - 10:05ONT-DUB

20h 05m2 stops

€434United Airlines

Find Deal

Fri, 7 Feb - Fri, 21 Feb

08:40 - 22:45DUB-ONT

22h 05m2 stops

07:00 - 12:05ONT-DUB

21h 05m2 stops

€446

Find Deal

Fri, 31 Jan - Tue, 4 Feb

05:00 - 18:19DUB-ONT

21h 19m2 stops

06:15 - 16:40ONT-DUB

26h 25m2 stops

€448

Find Deal

Sat, 1 Feb - Wed, 5 Feb

14:05 - 13:51DUB-ONT

31h 46m2 stops

10:00 - 08:40ONT-DUB

14h 40m2 stops

€460American Airlines

Find Deal

Fri, 31 Jan - Tue, 4 Feb

14:05 - 09:09DUB-ONT

27h 04m2 stops

10:00 - 08:40ONT-DUB

14h 40m2 stops

€463American Airlines

Find Deal

Fri, 31 Jan - Tue, 4 Feb

12:40 - 23:51DUB-ONT

19h 11m1 stop

07:00 - 09:45ONT-DUB

18h 45m1 stop

€463Iberia

Find Deal

Tue, 15 Apr - Mon, 21 Apr

11:00 - 19:29DUB-ONT

16h 29m1 stop

22:59 - 08:45ONT-DUB

25h 46m1 stop

€541KLM

Find Deal

Thu, 12 Jun - Fri, 4 Jul

12:40 - 22:11DUB-ONT

17h 31m1 stop

10:51 - 09:45ONT-DUB

14h 54m1 stop

€665Iberia

Find Deal

Sun, 13 Apr - Mon, 21 Apr

12:00 - 22:52DUB-ONT

18h 52m1 stop

07:05 - 09:45ONT-DUB

18h 40m1 stop

€739KLM

Find Deal

Mon, 24 Feb - Thu, 27 Feb

Flights to Ontario - Travel Insights & Trends

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.

Prices

The cheapest time of day to fly to Ontario is generally in the morning, when round-trip flights cost €714 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 €714.

Cheapest flight	€423

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.

See more FAQs

High season is considered to be January, February and December. The cheapest month to fly from Ireland is January.
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, +21 more

Aeromexico, Air Canada, +22 more

Tuesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Wednesday

Aeromexico, Air Canada, Air France, +20 more

Aeromexico, Air Canada, +21 more

Thursday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Alaska Airlines, +21 more

Aeromexico, Air Canada, +22 more

Sunday

Aeromexico, Air Canada, Air France, +20 more

Aeromexico, Air Canada, +21 more

See more direct flights

Direct returns

Ontario to Ireland

Monday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Tuesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Wednesday

Aeromexico, Air Canada, Air France, +20 more

Aeromexico, Air Canada, +21 more

Thursday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Alaska Airlines, +21 more

Aeromexico, Air Canada, +22 more

Sunday

Aeromexico, Air Canada, Air France, +20 more

Aeromexico, Air Canada, +21 more

See more direct flights

Book Cheap Ontario Plane Tickets

Recent return flight deals

These are the cheapest return flights to Ontario found on KAYAK in the last 72 hours.

7/2Fri

2 stopsBritish Airways

20h 00mDUB-ONT

10/2Mon

2 stopsBritish Airways

18h 01mONT-DUB

€423

7/2Fri

3 stopsUnited Airlines

32h 51mDUB-ONT

21/2Fri

2 stopsUnited Airlines

20h 05mONT-DUB

€434

31/1Fri

2 stops

22h 05mDUB-ONT

4/2Tue

2 stops

21h 05mONT-DUB

€446

1/2Sat

2 stops

21h 19mDUB-ONT

5/2Wed

2 stops

26h 25mONT-DUB

€448

31/1Fri

2 stopsAmerican Airlines

31h 46mDUB-ONT

4/2Tue

2 stopsAmerican Airlines

14h 40mONT-DUB

€460

31/1Fri

2 stopsAmerican Airlines

27h 04mDUB-ONT

4/2Tue

2 stopsAmerican Airlines

14h 40mONT-DUB

€462

15/4Tue

1 stopIberia

19h 11mDUB-ONT

21/4Mon

1 stopIberia

18h 45mONT-DUB

€463

12/6Thu

1 stopKLM

16h 29mDUB-ONT

4/7Fri

1 stopKLM

25h 46mONT-DUB

€541

13/4Sun

1 stopIberia

17h 31mDUB-ONT

21/4Mon

1 stopIberia

14h 54mONT-DUB

€665

24/2Mon

1 stopKLM

18h 52mDUB-ONT

27/2Thu

1 stopKLM

18h 40mONT-DUB

€739

Recent one-way flight deals

Only flying one-way? Below are some of the best deals for one-way flights to Ontario found on KAYAK in the last 72 hours.

10/4Thu

1 stopIberia

19h 11mDUB-ONT

€506

10/4Thu

2 stopsDelta

25h 42mDUB-ONT

€619

28/3Fri

2 stops

17h 25mDUB-ONT

€624

13/5Tue

1 stopKLM

19h 41mDUB-ONT

€629

15/2Sat

2 stopsLufthansa

24h 59mDUB-ONT

€631

28/5Wed

1 stopKLM

16h 42mDUB-ONT

€632

10/5Sat

2 stopsDelta

20h 15mDUB-ONT

€638

16/5Fri

1 stopDelta

19h 41mDUB-ONT

€639

3/3Mon

2 stops

19h 36mDUB-ONT

€687

31/3Mon

1 stopAmerican Airlines

14h 32mDUB-ONT

€750

Last minute flights to Ontario

Last minute flight, train and bus deals

These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to Ontario that are departing in the next 10 days.

19/1Sun

multi-stopUnited Airlines

20h 57mDUB-ONT

26/5Mon

multi-stopUnited Airlines

17h 45mONT-DUB

€756

19/1Sun

multi-stopIberia

21h 03mDUB-ONT

26/5Mon

multi-stopIberia

12h 55mONT-DUB

€1,116

20/1Mon

multi-stopUnited Airlines

19h 51mDUB-ONT

27/1Mon

multi-stopUnited Airlines

17h 00mONT-DUB

€1,379

16/1Thu

multi-stop

19h 09mDUB-ONT

4/2Tue

multi-stop

20h 15mONT-DUB

€4,738

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Ontario (ONT)

ONT

€423 Find Cheap Flights to Ontario

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 7/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

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

Cheap Flight Deals 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 from Ireland to Ontario

Flights to Ontario - Travel Insights & Trends

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 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 round-trip flights cost €714 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 €714.

How long is the flight to Ontario?

Good to know

Cheapest flight

When to book flights to Ontario

FAQs - booking Ontario flights

How far is Ontario Airport from central Ontario?

What is the name of Ontario’s airport?

How does KAYAK find such low prices 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?

What is the Hacker Fare option on flights to Ontario?

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

Top tips for finding cheap flights to Ontario

Prefer to fly direct to Ontario?

Book Cheap Ontario Plane Tickets

Recent return flight deals

Search by stops

Search by airline

Search by price

Recent one-way flight deals

Search by stops

Search by airline

Search by price

Last minute flights to Ontario

Last minute flight, train and bus deals

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario