How do I know if a flight to Ontario is a good deal?

A good deal on a flight to Ontario is around €532 return. This fare is in the lowest 25% of return flight prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

€379 CHEAP FLIGHTS to Ontario in 2026

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Cheapest return flight

€551

Typical prices: €532-€624

Multiple Airlines

Fri 2/11Thu 15/11

DUB - ONT • 1 stop

Cheapest one-way flight

€379

Typical prices: €659-€688

KLM

Wed 14/11

DUB - ONT • 1 stop

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We hope you enjoy your trip to Ontario!

Flight Deals

Cheap Flights to Ontario

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

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One-way

Last minute

All Flight Deals

Recent return flight deals to Ontario

Mon, 2 Nov - Sun, 15 Nov

12:55 - 09:40DUB Dublin-ONT Ontario

28h 45m1 stop Dallas/Fort Worth

10:30 - 07:10ONT Ontario-DUB Dublin

12h 40m1 stop Dallas/Fort Worth

€551Multiple Airlines

Thu, 14 Jan - Sun, 17 Jan

10:50 - 21:59DUB Dublin-ONT Ontario

19h 09m2 stops London Heathrow Phoenix Sky Harbor Intl

07:00 - 12:10ONT Ontario-DUB Dublin

21h 10m2 stops Dallas/Fort Worth London Heathrow

€553British Airways

Thu, 21 Jan - Mon, 25 Jan

10:50 - 23:17DUB Dublin-ONT Ontario

20h 27m2 stops London Heathrow Dallas/Fort Worth

13:24 - 19:45ONT Ontario-DUB Dublin

22h 21m2 stops Phoenix Sky Harbor Intl London Heathrow

€553British Airways

Thu, 21 Jan - Mon, 25 Jan

08:50 - 21:59DUB Dublin-ONT Ontario

21h 09m2 stops London Heathrow Phoenix Sky Harbor Intl

10:40 - 15:25ONT Ontario-DUB Dublin

20h 45m2 stops Dallas/Fort Worth London Heathrow

€553British Airways

Thu, 21 Jan - Mon, 25 Jan

08:50 - 21:59DUB Dublin-ONT Ontario

21h 09m2 stops London Heathrow Phoenix Sky Harbor Intl

10:40 - 15:25ONT Ontario-DUB Dublin

20h 45m2 stops Dallas/Fort Worth London Heathrow

€554British Airways

Mon, 2 Nov - Mon, 16 Nov

12:55 - 09:40DUB Dublin-ONT Ontario

28h 45m1 stop Dallas/Fort Worth

10:30 - 07:10ONT Ontario-DUB Dublin

12h 40m1 stop Dallas/Fort Worth

€561American Airlines

Mon, 2 Nov - Sun, 15 Nov

12:55 - 09:40DUB Dublin-ONT Ontario

28h 45m1 stop Dallas/Fort Worth

10:30 - 07:10ONT Ontario-DUB Dublin

12h 40m1 stop Dallas/Fort Worth

€561American Airlines

Mon, 2 Nov - Sun, 15 Nov

12:55 - 09:40DUB Dublin-ONT Ontario

28h 45m1 stop Dallas/Fort Worth

07:00 - 07:10ONT Ontario-DUB Dublin

16h 10m1 stop Dallas/Fort Worth

€561American Airlines

Thu, 5 Nov - Wed, 18 Nov

12:55 - 21:32DUB Dublin-ONT Ontario

16h 37m1 stop Dallas/Fort Worth

07:00 - 07:10ONT Ontario-DUB Dublin

16h 10m1 stop Dallas/Fort Worth

€562Iberia

Thu, 29 Oct - Wed, 11 Nov

12:55 - 21:11DUB Dublin-ONT Ontario

15h 16m1 stop Dallas/Fort Worth

10:30 - 07:10ONT Ontario-DUB Dublin

12h 40m1 stop Dallas/Fort Worth

€587American Airlines

Recent last minute flight deals to Ontario

Sat, 12 Sep - Sat, 19 Sep

15:25 - 11:16DUB Dublin-ONT Ontario

27h 51m1 stop Seattle/Tacoma Intl

06:02 - 12:15ONT Ontario-DUB Dublin

22h 13m1 stop Seattle/Tacoma Intl

€848Multiple Airlines

Mon, 14 Sep - Wed, 16 Sep

09:30 - 22:37DUB Dublin-ONT Ontario

21h 07m2 stops Philadelphia Dallas/Fort Worth

06:00 - 09:45ONT Ontario-DUB Dublin

19h 45m1 stop Dallas/Fort Worth

€915American Airlines

Mon, 14 Sep - Wed, 16 Sep

09:30 - 22:37DUB Dublin-ONT Ontario

21h 07m2 stops Philadelphia Dallas/Fort Worth

08:25 - 09:35ONT Ontario-DUB Dublin

17h 10m2 stops Dallas/Fort Worth Charlotte Douglas

€915American Airlines

Fri, 11 Sep - Tue, 15 Sep

12:40 - 20:07DUB Dublin-ONT Ontario

15h 27m1 stop Dallas/Fort Worth

12:37 - 09:45ONT Ontario-DUB Dublin

13h 08m1 stop Dallas/Fort Worth

€932American Airlines

Mon, 14 Sep - Wed, 16 Sep

15:25 - 23:24DUB Dublin-ONT Ontario

15h 59m1 stop Seattle/Tacoma Intl

14:22 - 09:45ONT Ontario-DUB Dublin

35h 23m1 stop Dallas/Fort Worth

€1,019Multiple Airlines

Mon, 14 Sep - Wed, 16 Sep

09:20 - 22:59DUB Dublin-ONT Ontario

21h 39m3 stops Montreal Pierre Elliott Trudeau Intl New York LaGuardia Chicago O'Hare Intl

05:00 - 09:45ONT Ontario-DUB Dublin

20h 45m2 stops Denver Intl Chicago O'Hare Intl

€1,213United Airlines

Mon, 14 Sep - Wed, 16 Sep

09:20 - 22:59DUB Dublin-ONT Ontario

21h 39m3 stops Montreal Pierre Elliott Trudeau Intl New York LaGuardia Chicago O'Hare Intl

05:00 - 09:45ONT Ontario-DUB Dublin

20h 45m3 stops Denver Intl New York LaGuardia Chicago O'Hare Intl

€1,213United Airlines

Mon, 14 Sep - Wed, 16 Sep

12:40 - 22:37DUB Dublin-ONT Ontario

17h 57m1 stop Dallas/Fort Worth

12:37 - 09:45ONT Ontario-DUB Dublin

13h 08m1 stop Dallas/Fort Worth

€1,249Iberia

Sun, 13 Sep - Sat, 26 Sep

12:40 - 18:53DUB Dublin-ONT Ontario

14h 13m1 stop Dallas/Fort Worth

12:37 - 09:45ONT Ontario-DUB Dublin

13h 08m1 stop Dallas/Fort Worth

€1,574American Airlines

Sun, 13 Sep - Sat, 26 Sep

17:10 - 20:57DUB Dublin-ONT Ontario

59h 47m2 stops Istanbul New York John F Kennedy Intl

22:39 - 23:05ONT Ontario-DUB Dublin

40h 26m2 stops New York John F Kennedy Intl Istanbul

€1,844Turkish Airlines

All return flight deals to Ontario

Mon, 2 Nov - Sun, 15 Nov

12:55 - 09:40DUB Dublin-ONT Ontario

28h 45m1 stop Dallas/Fort Worth

10:30 - 07:10ONT Ontario-DUB Dublin

12h 40m1 stop Dallas/Fort Worth

€551Multiple Airlines

Thu, 14 Jan - Sun, 17 Jan

10:50 - 21:59DUB Dublin-ONT Ontario

19h 09m2 stops London Heathrow Phoenix Sky Harbor Intl

07:00 - 12:10ONT Ontario-DUB Dublin

21h 10m2 stops Dallas/Fort Worth London Heathrow

€553British Airways

Thu, 21 Jan - Mon, 25 Jan

10:50 - 23:17DUB Dublin-ONT Ontario

20h 27m2 stops London Heathrow Dallas/Fort Worth

13:24 - 19:45ONT Ontario-DUB Dublin

22h 21m2 stops Phoenix Sky Harbor Intl London Heathrow

€553British Airways

Thu, 21 Jan - Mon, 25 Jan

08:50 - 21:59DUB Dublin-ONT Ontario

21h 09m2 stops London Heathrow Phoenix Sky Harbor Intl

10:40 - 15:25ONT Ontario-DUB Dublin

20h 45m2 stops Dallas/Fort Worth London Heathrow

€553British Airways

Thu, 21 Jan - Mon, 25 Jan

08:50 - 21:59DUB Dublin-ONT Ontario

21h 09m2 stops London Heathrow Phoenix Sky Harbor Intl

10:40 - 15:25ONT Ontario-DUB Dublin

20h 45m2 stops Dallas/Fort Worth London Heathrow

€554British Airways

Mon, 2 Nov - Mon, 16 Nov

12:55 - 09:40DUB Dublin-ONT Ontario

28h 45m1 stop Dallas/Fort Worth

10:30 - 07:10ONT Ontario-DUB Dublin

12h 40m1 stop Dallas/Fort Worth

€561American Airlines

Mon, 2 Nov - Sun, 15 Nov

12:55 - 09:40DUB Dublin-ONT Ontario

28h 45m1 stop Dallas/Fort Worth

10:30 - 07:10ONT Ontario-DUB Dublin

12h 40m1 stop Dallas/Fort Worth

€561American Airlines

Mon, 2 Nov - Sun, 15 Nov

12:55 - 09:40DUB Dublin-ONT Ontario

28h 45m1 stop Dallas/Fort Worth

07:00 - 07:10ONT Ontario-DUB Dublin

16h 10m1 stop Dallas/Fort Worth

€561American Airlines

Thu, 5 Nov - Wed, 18 Nov

12:55 - 21:32DUB Dublin-ONT Ontario

16h 37m1 stop Dallas/Fort Worth

07:00 - 07:10ONT Ontario-DUB Dublin

16h 10m1 stop Dallas/Fort Worth

€562Iberia

Thu, 29 Oct - Wed, 11 Nov

12:55 - 21:11DUB Dublin-ONT Ontario

15h 16m1 stop Dallas/Fort Worth

10:30 - 07:10ONT Ontario-DUB Dublin

12h 40m1 stop Dallas/Fort Worth

€587American Airlines

Booking Insights

Price, demand, and travel trends for Ireland to Ontario flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Ireland to Ontario with more confidence.

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

Morning flights to Ontario are the cheapest at €533 return on average. Night flights are the most expensive at €785.

Find deals

Cheapest flight	€379

Flights 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 do I know if a flight to Ontario is a good deal?
A good deal on a flight to Ontario is around €532 return. This fare is in the lowest 25% of return flight prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

For flights to Ontario, recent KAYAK data shows that stronger deals tend to be around €532 return. If you see a fare below that threshold, it's a good deal – book before the price climbs back up.
Before you book:

• Check the route's typical price range so you can spot a deal.
• Confirm baggage fees and seat selection costs on budget carriers.
• Verify whether you need any travel documents beyond an ID.
• Pick a departure airport, since your nearest may not be the cheapest origin.
Shift your departure to morning to save up to €253 per return. Morning flights to Ontario average €533 compared to €785 for evening flights. See the time-of-day chart above for the full breakdown.

More options for your flight to Ontario

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ONT

€379 Find Cheap Flights to Ontario – Compare and Save

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

Price, demand, and travel trends for Ireland to Ontario flights

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

Key details for flights to Ontario

Cheapest flight

When to book flights to Ontario

Your questions about flights to Ontario, answered

Your guide to booking Ontario flights

More options for your flight to Ontario

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

Information on the airport you'll fly into in Ontario

Cabin class types available on flights to Ontario

Flights from local origins to Ontario

Flights to other popular destinations

Find deals for your return flight