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Cheap flights from Ontario to Ireland from €389

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Ireland departing on 6/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
05:15 - 06:10ONT-DUB
40h 55m2 stops
United Airlines Logo
08:00 - 20:50DUB-ONT
43h 50m2 stops
€548United Airlines
Find Deal
Sat, 7 Mar - Wed, 18 Mar
United Airlines Logo
23:59 - 08:10ONT-DUB
24h 11m1 stop
United Airlines Logo
08:00 - 12:18DUB-ONT
35h 18m2 stops
€549United Airlines
Find Deal
Sat, 7 Mar - Wed, 18 Mar
British Airways Logo
16:45 - 17:05ONT-DUB
16h 20m2 stops
British Airways Logo
20:40 - 17:22DUB-ONT
28h 42m2 stops
€558British Airways
Find Deal
Mon, 12 Jan - Wed, 21 Jan
Air Canada Logo
05:05 - 07:10ONT-DUB
18h 05m2 stops
Air Canada Logo
09:00 - 20:58DUB-ONT
19h 58m2 stops
€568Air Canada
Find Deal
Sun, 7 Dec - Wed, 14 Jan
Delta Logo
22:20 - 07:45ONT-DUB
25h 25m1 stop
Delta Logo
05:55 - 17:15DUB-ONT
18h 20m2 stops
€570Delta
Find Deal
Sat, 7 Mar - Tue, 17 Mar
Iberia Logo
11:01 - 09:45ONT-DUB
14h 44m1 stop
Iberia Logo
13:45 - 23:40DUB-ONT
17h 55m1 stop
€571Iberia
Find Deal
Wed, 15 Apr - Wed, 29 Apr
Delta Logo
22:20 - 07:45ONT-DUB
25h 25m1 stop
Delta Logo
09:45 - 21:14DUB-ONT
18h 29m1 stop
€571Delta
Find Deal
Sat, 7 Mar - Tue, 17 Mar
United Airlines Logo
05:15 - 06:10ONT-DUB
17h 55m2 stops
United Airlines Logo
10:40 - 22:25DUB-ONT
18h 45m1 stop
€572United Airlines
Find Deal
Sun, 8 Mar - Tue, 17 Mar
United Airlines Logo
08:00 - 07:30ONT-DUB
15h 30m2 stops
United Airlines Logo
09:00 - 22:57DUB-ONT
45h 57m2 stops
€575United Airlines
Find Deal
Wed, 11 Feb - Sun, 15 Feb
British Airways Logo
12:55 - 16:10ONT-SNN
19h 15m2 stops
British Airways Logo
21:15 - 21:56SNN-ONT
32h 41m2 stops
€714British Airways
Find Deal
Sun, 10 May - Sun, 17 May

United Airlines flights from Ontario to Ireland

Our best United Airlines deals on Ontario to Ireland flight tickets
United Airlines
7 Mar
ONT05:15Ontario
40h 55m
2 stops
DUB06:10Dublin
18 Mar
DUB08:00Dublin
43h 50m
2 stops
ONT20:50Ontario
€548
Find similar
United Airlines
7 Mar
ONT23:59Ontario
24h 11m
1 stop
DUB08:10Dublin
18 Mar
DUB08:00Dublin
35h 18m
2 stops
ONT12:18Ontario
€549
Find similar
United Airlines
8 Mar
ONT05:15Ontario
17h 55m
2 stops
DUB06:10Dublin
17 Mar
DUB10:40Dublin
18h 45m
1 stop
ONT22:25Ontario
€572
Find similar

British Airways flights from Ontario to Ireland

Our best British Airways deals on Ontario to Ireland flight tickets
British Airways
12 Jan
ONT16:45Ontario
16h 20m
2 stops
DUB17:05Dublin
21 Jan
DUB20:40Dublin
28h 42m
2 stops
ONT17:22Ontario
€558
Find similar
British Airways
11 Jan
ONT16:45Ontario
16h 05m
2 stops
DUB16:50Dublin
18 Jan
DUB10:45Dublin
20h 03m
2 stops
ONT22:48Ontario
€586
Find similar
British Airways
15 Feb
ONT16:59Ontario
15h 51m
2 stops
DUB16:50Dublin
22 Feb
DUB10:45Dublin
19h 23m
2 stops
ONT22:08Ontario
€594
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Ontario to Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 13,528 searches. Data last updated 23 November 2025.
Use the filters below to find and compare flights from Ontario to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 7/3

05:15-06:10

2 stops40h 55m

Dublin

Wed 18/3

08:00-20:50

2 stops43h 50m

€548

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 7/3

23:59-08:10

1 stop24h 11m

Dublin

Wed 18/3

08:00-12:18

2 stops35h 18m

€549

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 12/1

16:45-17:05

2 stops16h 20m

Dublin

Wed 21/1

20:40-17:22

2 stops28h 42m

€558

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 7/12

05:05-07:10

2 stops18h 05m

Dublin

Wed 14/1

09:00-20:58

2 stops19h 58m

€568

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 7/3

22:20-07:45

1 stop25h 25m

Dublin

Tue 17/3

05:55-17:15

2 stops18h 20m

€570

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 15/4

11:01-09:45

1 stop14h 44m

Dublin

Wed 29/4

13:45-23:40

1 stop17h 55m

€571

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sat 7/3

22:20-07:45

1 stop25h 25m

Dublin

Tue 17/3

09:45-21:14

1 stop18h 29m

€571

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 8/3

05:15-06:10

2 stops17h 55m

Dublin

Tue 17/3

10:40-22:25

1 stop18h 45m

€572

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 11/2

08:00-07:30

2 stops15h 30m

Dublin

Sun 15/2

09:00-22:57

2 stops45h 57m

€575

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sun 10/5

12:55-16:10

2 stops19h 15m

Shannon

Sun 17/5

21:15-21:56

2 stops32h 41m

€714

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ireland from

How to get the cheapest flight ticket from Ontario to Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Ireland?

The month of March is another great option to travel to Ireland, with average flight prices from Ontario averaging around €534.

Cheap Ontario to Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Ireland

Direct flights

None
There are no direct flights from Ontario to Ireland. There are no popular flight routes from Ontario to Ireland.
Search flight deals

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

    Prices for flights from Ontario Airport to Ireland refresh daily.

  • How old do you have to be to fly from Ontario Airport to Ireland?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Ireland.

  • What documentation or ID do you need to fly to Ireland?

    The required travel and health documents for your Ireland trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Ireland. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Ireland. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Ontario to Ireland flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Ireland?

momondo provides multiple filters to help you find the best flight to Ireland from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Ontario to Ireland flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to Ireland

Popular Cities in Ireland

Popular flights according to clicks in the last 7 days on momondo
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