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Flights to Ontario

€471 Cheap flights to Ontario

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Ontario departing on 14/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Ireland to Ontario

Cheap return flights

Enter your travel dates to find the best prices.
American Airlines Logo
11:45 - 22:36
DUB
-
ONT
18h 51m
1 stop
American Airlines Logo
12:41 - 09:45
ONT
-
DUB
13h 04m
1 stop
€533American Airlines
Mon, 15 Jun - Sun, 28 Jun
American Airlines Logo
11:30 - 23:57
DUB
-
ONT
20h 27m
2 stops
American Airlines Logo
06:20 - 07:15
ONT
-
DUB
16h 55m
2 stops
€610American Airlines
Wed, 25 Nov - Sun, 29 Nov
American Airlines Logo
13:00 - 08:55
DUB
-
ONT
27h 55m
2 stops
American Airlines Logo
06:20 - 07:15
ONT
-
DUB
16h 55m
2 stops
€611American Airlines
Wed, 25 Nov - Sun, 29 Nov
Iberia Logo
13:00 - 22:23
DUB
-
ONT
17h 23m
1 stop
Iberia Logo
07:00 - 07:15
ONT
-
DUB
16h 15m
1 stop
€613Iberia
Mon, 9 Nov - Mon, 16 Nov
Iberia Logo
12:40 - 21:09
DUB
-
ONT
16h 29m
1 stop
Iberia Logo
12:35 - 09:45
ONT
-
DUB
13h 10m
1 stop
€615Iberia
Thu, 1 Oct - Wed, 14 Oct
Iberia Logo
12:40 - 19:56
DUB
-
ONT
15h 16m
1 stop
Iberia Logo
12:41 - 09:45
ONT
-
DUB
13h 04m
1 stop
€616Iberia
Tue, 16 Jun - Tue, 23 Jun
British Airways Logo
11:45 - 22:36
DUB
-
ONT
18h 51m
1 stop
British Airways Logo
12:37 - 09:45
ONT
-
DUB
13h 08m
1 stop
€669British Airways
Mon, 15 Jun - Wed, 9 Sep
JetBlue Logo
11:30 - 22:35
DUB
-
ONT
19h 05m
1 stop
JetBlue Logo
21:10 - 09:00
ONT
-
DUB
27h 50m
1 stop
€679JetBlue
Thu, 3 Sep - Sat, 12 Sep
Multiple Airlines Logo
09:40 - 18:18
DUB
-
ONT
16h 38m
1 stop
Multiple Airlines Logo
07:00 - 07:45
ONT
-
DUB
16h 45m
1 stop
€694Multiple Airlines
Thu, 19 Nov - Wed, 2 Dec
British Airways Logo
07:10 - 18:15
ORK
-
ONT
19h 05m
2 stops
British Airways Logo
12:59 - 19:50
ONT
-
ORK
22h 51m
2 stops
€759British Airways
Sat, 29 Aug - Tue, 8 Sep

momondo Fare Finder

 
Locate flights to Ontario that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 13,528 searches and data was last updated on 6 June 2026.
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 15/6

11:45-22:36

1 stop18h 51m

Ontario

Sun 28/6

12:41-09:45

1 stop13h 04m

€533

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 25/11

11:30-23:57

2 stops20h 27m

Ontario

Sun 29/11

06:20-07:15

2 stops16h 55m

€610

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 25/11

13:00-08:55

2 stops27h 55m

Ontario

Sun 29/11

06:20-07:15

2 stops16h 55m

€611

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 9/11

13:00-22:23

1 stop17h 23m

Ontario

Mon 16/11

07:00-07:15

1 stop16h 15m

€613

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 1/10

12:40-21:09

1 stop16h 29m

Ontario

Wed 14/10

12:35-09:45

1 stop13h 10m

€615
Fastest return journey

DublinOntario

DUB - ONT

DUBONT

Dublin

Tue 16/6

12:40-19:56

1 stop15h 16m

Ontario

Tue 23/6

12:41-09:45

1 stop13h 04m

€616

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 15/6

11:45-22:36

1 stop18h 51m

Ontario

Wed 9/9

12:37-09:45

1 stop13h 08m

€669

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 3/9

11:30-22:35

1 stop19h 05m

Ontario

Sat 12/9

21:10-09:00

1 stop27h 50m

€679

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 19/11

09:40-18:18

1 stop16h 38m

Ontario

Wed 2/12

07:00-07:45

1 stop16h 45m

€694

CorkOntario

ORK - ONT

ORKONT

Cork

Sat 29/8

07:10-18:15

2 stops19h 05m

Ontario

Tue 8/9

12:59-19:50

2 stops22h 51m

€759

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Ontario from

Ontario flights insights and trends

Explore insights for your Ontario flight to craft the best travel plan

How long does it take to fly to Ontario?

Flight times vary depending on what airport in Ireland you fly out of and what airport in Ontario you fly into. For example, flying from Dublin to Los Angeles takes 11h on average. On the other hand, flying from Cork to Los Angeles takes 13h 35m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo to see if there are any available for your route.

Cheapest flights to Ontario

Find the cheapest flights to Ontario from your nearest city or airport

Cheap Ontario flight deals and tips

Summary info about Ontario flight prices, duration and airlines

Best One-Way Price

€471

Best Round-Trip Price

€533

Fastest flight time

19h 05m
The best one-way flight price to Ontario from Ireland in the last 5 days is €471 (Dublin to Ontario).
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The best round-trip flight price to Ontario from Ireland in the last 5 days is €533 (Dublin to Ontario).
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The fastest flight to Ontario from Ireland takes 19h 05m (Dublin to Ontario).
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Frequently asked questions about flying to Ontario

Is there an alternative airport near Ontario?

Finding an alternative and possibly cheaper destination airport near Ontario is possible. If you are planning a flight to Ontario, consider booking flights to Ontario Airport (5 km from Ontario city centre), San Bernardino Int Airport (38 km from Ontario city centre), Santa Ana J. Wayne/Orange Cnty Airport (47 km from Ontario city centre), Long Beach Municipal Airport (54 km from Ontario city centre) or Burbank Bob Hope Airport (67 km from Ontario city centre).

Is there a cheaper alternative to flying into Ontario?

Burbank Bob Hope Airport has an average price of €329 per person and is typically the cheapest airport to fly into when visiting Ontario. This average price does vary based on departure city. Try momondo’s Airport-to-Airport Pricing Tool to find the cheapest flight.

What is the absolute cheapest flight to Ontario?

The best price found on momondo to Ontario was €119/pp from Orlando, which is 64% cheaper than the average flight price to Ontario. To find the cheapest price to Ontario from your area, use momondo’s Airport-to-Airport Pricing Tool.

When did momondo last update prices for flights to Ontario Airport?

Prices for flights to Ontario Airport are refreshed on a daily basis.

How old do you have to be to fly to Ontario Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal to Ontario?

Finding the right flight to Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

Can I find flights to Ontario with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights to Ontario?

Once you have performed a search for flights to Ontario, momondo helps you find the right flight by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Ontario trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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Find better results for your trip to Ontario

Popular Flights to Ontario

Popular routes according to searches in the past day on momondo
Dublin to Ontario Flightsfrom €773
Cork to Ontario Flightsfrom €993