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Flights to Ontario

€310 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 20/8. 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.
JetBlue Logo
11:30 - 22:38
DUB
-
ONT
19h 08m
1 stop
JetBlue Logo
23:13 - 09:00
ONT
-
DUB
25h 47m
1 stop
€588JetBlue
Thu, 20 Aug - Sat, 5 Sep
JetBlue Logo
11:30 - 22:38
DUB
-
ONT
19h 08m
1 stop
JetBlue Logo
23:13 - 09:00
ONT
-
DUB
25h 47m
1 stop
€589JetBlue
Thu, 20 Aug - Sat, 5 Sep
JetBlue Logo
11:30 - 22:38
DUB
-
ONT
19h 08m
1 stop
JetBlue Logo
23:13 - 09:00
ONT
-
DUB
25h 47m
1 stop
€607JetBlue
Fri, 21 Aug - Sat, 5 Sep
JetBlue Logo
11:30 - 22:38
DUB
-
ONT
19h 08m
1 stop
JetBlue Logo
23:13 - 09:00
ONT
-
DUB
25h 47m
1 stop
€609JetBlue
Fri, 21 Aug - Sat, 5 Sep
JetBlue Logo
11:30 - 22:37
DUB
-
ONT
19h 07m
1 stop
JetBlue Logo
23:50 - 09:00
ONT
-
DUB
25h 10m
1 stop
€620JetBlue
Wed, 2 Sep - Mon, 7 Sep
American Airlines Logo
12:40 - 18:47
DUB
-
ONT
14h 07m
1 stop
American Airlines Logo
12:37 - 09:45
ONT
-
DUB
13h 08m
1 stop
€642American Airlines
Mon, 7 Sep - Sun, 13 Sep
Iberia Logo
13:00 - 23:06
DUB
-
ONT
17h 06m
1 stop
Iberia Logo
07:00 - 07:15
ONT
-
DUB
16h 15m
1 stop
€661Iberia
Thu, 29 Oct - Fri, 13 Nov
Iberia Logo
12:40 - 18:57
DUB
-
ONT
14h 17m
1 stop
Iberia Logo
06:10 - 07:15
ONT
-
DUB
17h 05m
1 stop
€664Iberia
Mon, 5 Oct - Tue, 17 Nov
British Airways Logo
11:25 - 23:52
ORK
-
ONT
20h 27m
2 stops
British Airways Logo
13:11 - 15:10
ONT
-
ORK
17h 59m
2 stops
€1,853British Airways
Sat, 25 Jul - Sat, 1 Aug
British Airways Logo
11:25 - 22:37
ORK
-
ONT
19h 12m
2 stops
British Airways Logo
10:47 - 11:10
ONT
-
ORK
16h 23m
2 stops
€6,038British Airways
Sat, 26 Sep - Thu, 12 Nov

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 30 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

Thu 20/8

11:30-22:38

1 stop19h 08m

Ontario

Sat 5/9

23:13-09:00

1 stop25h 47m

€588

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 20/8

11:30-22:38

1 stop19h 08m

Ontario

Sat 5/9

23:13-09:00

1 stop25h 47m

€589

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 21/8

11:30-22:38

1 stop19h 08m

Ontario

Sat 5/9

23:13-09:00

1 stop25h 47m

€607

DublinOntario

DUB - ONT

DUBONT

Dublin

Fri 21/8

11:30-22:38

1 stop19h 08m

Ontario

Sat 5/9

23:13-09:00

1 stop25h 47m

€609

DublinOntario

DUB - ONT

DUBONT

Dublin

Wed 2/9

11:30-22:37

1 stop19h 07m

Ontario

Mon 7/9

23:50-09:00

1 stop25h 10m

€620
Fastest return journey

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 7/9

12:40-18:47

1 stop14h 07m

Ontario

Sun 13/9

12:37-09:45

1 stop13h 08m

€642

DublinOntario

DUB - ONT

DUBONT

Dublin

Thu 29/10

13:00-23:06

1 stop17h 06m

Ontario

Fri 13/11

07:00-07:15

1 stop16h 15m

€661

DublinOntario

DUB - ONT

DUBONT

Dublin

Mon 5/10

12:40-18:57

1 stop14h 17m

Ontario

Tue 17/11

06:10-07:15

1 stop17h 05m

€664

CorkOntario

ORK - ONT

ORKONT

Cork

Sat 25/7

11:25-23:52

2 stops20h 27m

Ontario

Sat 1/8

13:11-15:10

2 stops17h 59m

€1,853

CorkOntario

ORK - ONT

ORKONT

Cork

Sat 26/9

11:25-22:37

2 stops19h 12m

Ontario

Thu 12/11

10:47-11:10

2 stops16h 23m

€6,038

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 Los Angeles takes 11h on average. On the other hand, flying from Cork to Los Angeles 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

€310

Best Round-Trip Price

€588

Fastest flight time

19h 08m
The best one-way flight price to Ontario from Ireland in the last 5 days is €310 (Dublin to Ontario).
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The best round-trip flight price to Ontario from Ireland in the last 5 days is €588 (Dublin to Ontario).
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The fastest flight to Ontario from Ireland takes 19h 08m (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 €334 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.

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.
Start using Trips
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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 €672
Cork to Ontario Flightsfrom €2,114