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Cheap flights from Ontario to Dublin from $368

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 Dublin departing on 10/18. 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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Find the cheapest flights from Ontario to Dublin (ONT-DUB)

Cheap round-trip flights

United Airlines Logo
11:59 pm - 10:20 amONT-DUB
26h 21m2 stops
United Airlines Logo
9:00 am - 10:26 pmDUB-ONT
45h 26m2 stops
$609United Airlines
Find Deal
Fri, Jan 2 - Sat, Jan 10
United Airlines Logo
7:00 am - 8:10 amONT-DUB
18h 10m1 stop
United Airlines Logo
9:00 am - 12:37 pmDUB-ONT
35h 37m2 stops
$614United Airlines
Find Deal
Thu, Oct 30 - Wed, Nov 5
United Airlines Logo
7:00 am - 7:30 amONT-DUB
17h 30m2 stops
United Airlines Logo
9:00 am - 12:37 pmDUB-ONT
35h 37m2 stops
$619United Airlines
Find Deal
Thu, Oct 30 - Wed, Nov 5
JetBlue Logo
11:59 pm - 8:20 amONT-DUB
24h 21m1 stop
JetBlue Logo
11:30 am - 9:29 pmDUB-ONT
17h 59m1 stop
$648JetBlue
Find Deal
Mon, Sep 1 - Tue, Sep 16
JetBlue Logo
10:56 pm - 8:20 amONT-DUB
25h 24m1 stop
JetBlue Logo
11:30 am - 9:29 pmDUB-ONT
17h 59m1 stop
$649JetBlue
Find Deal
Mon, Sep 8 - Wed, Sep 24
American Airlines Logo
12:47 pm - 11:15 amONT-DUB
15h 28m2 stops
American Airlines Logo
11:30 am - 11:57 pmDUB-ONT
20h 27m2 stops
$655American Airlines
Find Deal
Wed, Oct 29 - Thu, Nov 6
Iberia Logo
10:57 am - 9:45 amONT-DUB
14h 48m1 stop
Iberia Logo
12:55 pm - 11:57 pmDUB-ONT
19h 02m1 stop
$675Iberia
Find Deal
Mon, Oct 20 - Sun, Nov 2
American Airlines Logo
12:45 pm - 9:45 amONT-DUB
13h 00m1 stop
American Airlines Logo
12:40 pm - 6:54 pmDUB-ONT
14h 14m1 stop
$727American Airlines
Find Deal
Sun, Sep 7 - Tue, Sep 23
Iberia Logo
12:47 pm - 9:45 amONT-DUB
12h 58m1 stop
Iberia Logo
12:40 pm - 10:18 pmDUB-ONT
17h 38m1 stop
$737Iberia
Find Deal
Wed, Oct 8 - Thu, Oct 23
Delta Logo
11:55 am - 8:45 amONT-DUB
12h 50m1 stop
Delta Logo
11:00 am - 7:15 pmDUB-ONT
16h 15m1 stop
$803Delta
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Thu, Sep 11 - Tue, Sep 16

KLM flights from Ontario to Dublin

Our best KLM deals on Ontario to Dublin flight tickets
KLM
Oct 13
ONT11:36 amOntario
13h 09m
1 stop
DUB8:45 amDublin
Oct 31
DUB9:45 amDublin
16h 34m
1 stop
ONT7:19 pmOntario
$732
Find similar
KLM
Sep 11
ONT11:55 amOntario
12h 50m
1 stop
DUB8:45 amDublin
Sep 24
DUB11:00 amDublin
16h 15m
1 stop
ONT7:15 pmOntario
$760
Find similar
KLM
Nov 28
ONT7:00 amOntario
16h 45m
1 stop
DUB7:45 amDublin
Dec 3
DUB9:45 amDublin
17h 57m
1 stop
ONT7:42 pmOntario
$775
Find similar

United Airlines flights from Ontario to Dublin

Our best United Airlines deals on Ontario to Dublin flight tickets
United Airlines
Jan 2
ONT11:59 pmOntario
26h 21m
2 stops
DUB10:20 amDublin
Jan 10
DUB9:00 amDublin
45h 26m
2 stops
ONT10:26 pmOntario
$609
Find similar
United Airlines
Oct 30
ONT7:00 amOntario
18h 10m
1 stop
DUB8:10 amDublin
Nov 5
DUB9:00 amDublin
35h 37m
2 stops
ONT12:37 pmOntario
$614
Find similar
United Airlines
Oct 30
ONT7:00 amOntario
17h 30m
2 stops
DUB7:30 amDublin
Nov 5
DUB9:00 amDublin
35h 37m
2 stops
ONT12:37 pmOntario
$619
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Dublin 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 832,500 searches. Data last updated August 21, 2025.
Use the filters below to find and compare flights from Ontario to Dublin that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Fri 1/2

11:59 pm-10:20 am

2 stops26h 21m

Dublin

Sat 1/10

9:00 am-10:26 pm

2 stops45h 26m

$609

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 10/30

7:00 am-8:10 am

1 stop18h 10m

Dublin

Wed 11/5

9:00 am-12:37 pm

2 stops35h 37m

$614

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 10/30

7:00 am-7:30 am

2 stops17h 30m

Dublin

Wed 11/5

9:00 am-12:37 pm

2 stops35h 37m

$619

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 9/1

11:59 pm-8:20 am

1 stop24h 21m

Dublin

Tue 9/16

11:30 am-9:29 pm

1 stop17h 59m

$648

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 9/8

10:56 pm-8:20 am

1 stop25h 24m

Dublin

Wed 9/24

11:30 am-9:29 pm

1 stop17h 59m

$649

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/29

12:47 pm-11:15 am

2 stops15h 28m

Dublin

Thu 11/6

11:30 am-11:57 pm

2 stops20h 27m

$655

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Mon 10/20

10:57 am-9:45 am

1 stop14h 48m

Dublin

Sun 11/2

12:55 pm-11:57 pm

1 stop19h 02m

$675

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Sun 9/7

12:45 pm-9:45 am

1 stop13h 00m

Dublin

Tue 9/23

12:40 pm-6:54 pm

1 stop14h 14m

$727

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Wed 10/8

12:47 pm-9:45 am

1 stop12h 58m

Dublin

Thu 10/23

12:40 pm-10:18 pm

1 stop17h 38m

$737

OntarioDublin

ONT - DUB

ONTDUB

Ontario

Thu 9/11

11:55 am-8:45 am

1 stop12h 50m

Dublin

Tue 9/16

11:00 am-7:15 pm

1 stop16h 15m

$803

Flights are sorted by cheapest round-trip flights first.

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

How to get the cheapest flight ticket from Ontario to Dublin

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 Dublin?

In general, December is the cheapest month to fly from Ontario to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $573. If you’re not able to fly to Dublin in December, then March is your next best option. Flight prices from Ontario to Dublin during March average around $607.

What is the cheapest day to depart on your flight to Dublin?

The cheapest day to depart from Ontario to Dublin is on a Wednesday. Travelers who choose to depart for Dublin on a Wednesday will often find tickets for as low as $732. Flights from Ontario to Dublin on a Saturday will generally be more expensive and average around $852. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Dublin?

In the afternoon is the cheapest time of day to fly from Ontario to Dublin when you can find flight prices for as low as $666. Flying to Dublin in the afternoon is an ideal time because this is during off-peak travel hours. Flights in the morning are often more expensive with an average ticket price of $849.

Can stopping save me money on Ontario to Dublin flights?

You could potentially save up to 19% on your flight if you consider stops on a Ontario to Dublin flight.

When to book flights from Ontario to Dublin

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Dublin according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Dublin (ONT to DUB) flight deals and tips

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

Direct flights

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

  • How far is Ontario to Dublin by plane?

    The distance between Ontario and Dublin is about 5136.8 mi. Typically, this will take 12h 23m by plane in normal conditions.

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

    Prices for flights from Ontario Airport to Dublin Airport were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Dublin Airport?

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Dublin Airport.

  • What documentation or ID do you need to fly to Dublin Airport?

    The required travel and health documents for your Dublin Airport 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 license and a passport valid for six months after your intended arrival at Dublin Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Ontario to Dublin?

Best airlines flying from Ontario to Dublin

Compare and see reviews for airlines that fly from Ontario to Dublin with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $527Free CancellationRating
7.9
7,981 reviews
Search Delta flights
IberiaPriceFrom $547Free CancellationRating
7.0
2,884 reviews
Search Iberia flights
American AirlinesPriceFrom $623Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Traveling to a place near Dublin?

Book flights to Dublin if you plan to visit one of these locations
Kilkenny
Swords
Athlone
Dundalk
Malahide
Maynooth
Leixlip
Bray
Castleknock
Kildare
Naas
Mullingar
Arklow
Cavan
Enniscorthy
Wicklow
Drogheda
Thurles
Slane

Why use momondo?

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

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

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

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

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

momondo helps you find the best flight between Ontario and Dublin by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Ontario to Dublin 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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