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 16h 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 many cities have direct flights to Ontario?

From Ireland, there are direct flights to Ontario from 22 cities . The city with the most direct flights is Seattle, with 123 direct flights each week.

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>

€559 Book 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

12:40 - 22:10DUB-ONT

17h 30m1 stop

14:44 - 19:20ONT-DUB

20h 36m2 stops

€557

Find Deal

Fri, 4 Apr - Fri, 11 Apr

20:15 - 21:58DUB-ONT

33h 43m2 stops

12:50 - 19:20ONT-DUB

22h 30m2 stops

€559British Airways

Find Deal

Fri, 4 Apr - Fri, 11 Apr

12:40 - 23:50DUB-ONT

19h 10m1 stop

12:50 - 09:45ONT-DUB

12h 55m1 stop

€562Iberia

Find Deal

Fri, 4 Apr - Fri, 11 Apr

08:40 - 22:04DUB-ONT

21h 24m2 stops

07:00 - 08:40ONT-DUB

18h 40m2 stops

€588American Airlines

Find Deal

Wed, 5 Mar - Sun, 9 Mar

06:00 - 22:52ORK-ONT

24h 52m2 stops

13:30 - 12:55ONT-ORK

16h 25m2 stops

€594KLM

Find Deal

Thu, 6 Mar - Mon, 10 Mar

08:00 - 20:57DUB-ONT

19h 57m2 stops

06:10 - 10:20ONT-DUB

20h 10m2 stops

€623United Airlines

Find Deal

Wed, 19 Mar - Wed, 2 Apr

08:00 - 20:57DUB-ONT

19h 57m2 stops

06:00 - 07:10ONT-DUB

17h 10m2 stops

€623United Airlines

Find Deal

Wed, 19 Mar - Wed, 2 Apr

12:40 - 22:10DUB-ONT

17h 30m1 stop

12:50 - 09:45ONT-DUB

12h 55m1 stop

€642Iberia

Find Deal

Fri, 4 Apr - Fri, 11 Apr

12:00 - 22:43DUB-ONT

17h 43m1 stop

12:46 - 09:45ONT-DUB

13h 59m1 stop

€662KLM

Find Deal

Tue, 11 Mar - Tue, 18 Mar

12:40 - 18:29DUB-ONT

13h 49m1 stop

10:54 - 09:45ONT-DUB

14h 51m1 stop

€710American Airlines

Find Deal

Thu, 17 Apr - Mon, 21 Apr

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 €702 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 €702.

Cheapest flight	€557

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, +22 more

Aeromexico, Air Canada, +23 more

Tuesday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Wednesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Thursday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Friday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Saturday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Sunday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 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, +22 more

Aeromexico, Air Canada, +23 more

Wednesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Thursday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Friday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Saturday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Sunday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 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.

4/4Fri

1 stop

17h 30mDUB-ONT

11/4Fri

2 stops

20h 36mONT-DUB

€557

4/4Fri

2 stopsBritish Airways

33h 43mDUB-ONT

11/4Fri

2 stopsBritish Airways

22h 30mONT-DUB

€559

4/4Fri

1 stopIberia

19h 10mDUB-ONT

11/4Fri

1 stopIberia

12h 55mONT-DUB

€562

5/3Wed

2 stopsAmerican Airlines

21h 24mDUB-ONT

9/3Sun

2 stopsAmerican Airlines

18h 40mONT-DUB

€588

6/3Thu

2 stopsKLM

24h 52mORK-ONT

10/3Mon

2 stopsKLM

16h 25mONT-ORK

€594

19/3Wed

2 stopsUnited Airlines

19h 57mDUB-ONT

2/4Wed

2 stopsUnited Airlines

20h 10mONT-DUB

€623

19/3Wed

2 stopsUnited Airlines

19h 57mDUB-ONT

2/4Wed

2 stopsUnited Airlines

17h 10mONT-DUB

€623

4/4Fri

1 stopIberia

17h 30mDUB-ONT

11/4Fri

1 stopIberia

12h 55mONT-DUB

€642

11/3Tue

1 stopKLM

17h 43mDUB-ONT

18/3Tue

1 stopKLM

13h 59mONT-DUB

€662

17/4Thu

1 stopAmerican Airlines

13h 49mDUB-ONT

21/4Mon

1 stopAmerican Airlines

14h 51mONT-DUB

€710

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 10mDUB-ONT

€573

10/4Thu

2 stopsBritish Airways

19h 05mDUB-ONT

€574

28/3Fri

2 stops

20h 47mDUB-ONT

€575

20/3Thu

2 stopsAmerican Airlines

26h 56mDUB-ONT

€577

2/4Wed

1 stopIberia

19h 14mDUB-ONT

€578

2/4Wed

2 stops

19h 09mDUB-ONT

€582

30/5Fri

1 stopJetBlue

17h 37mDUB-ONT

€670

20/3Thu

1 stopKLM

17h 43mDUB-ONT

€699

15/3Sat

1 stopKLM

17h 43mDUB-ONT

€898

2/7Wed

1 stopJetBlue

18h 45mDUB-ONT

€1,087

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.

24/2Mon

multi-stopKLM

18h 52mDUB-ONT

3/3Mon

multi-stopKLM

18h 40mONT-DUB

€729

24/2Mon

multi-stopUnited Airlines

17h 02mDUB-ONT

3/3Mon

multi-stopUnited Airlines

17h 00mONT-DUB

€731

24/2Mon

multi-stopKLM

18h 52mDUB-ONT

7/3Fri

multi-stopKLM

18h 40mONT-DUB

€7,176

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Ontario (ONT)

ONT

€557 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 4/4. 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 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 €702 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 €702.

How long is the flight to Ontario?

How many cities have direct flights to Ontario?

From Ireland, there are direct flights to Ontario from 22 cities. The city with the most direct flights is Seattle, with 123 direct flights each week.

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