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Cheap flights from Ontario to Shannon from $453

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 Shannon departing on 3/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Shannon

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:16 am - 11:30 am
ONT
-
SNN
20h 14m2 stops
American Airlines Logo
7:50 am - 10:48 pm
SNN
-
ONT
22h 58m2 stops
$484American Airlines
Sat, Jan 17 - Sat, Jan 24
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m1 stop
United Airlines Logo
9:30 am - 10:26 pm
SNN
-
ONT
20h 56m1 stop
$570United Airlines
Wed, May 27 - Fri, Jun 5
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m1 stop
United Airlines Logo
9:30 am - 8:17 pm
SNN
-
ONT
18h 47m2 stops
$575United Airlines
Wed, May 27 - Thu, Jun 4
British Airways Logo
12:55 pm - 4:10 pm
ONT
-
SNN
19h 15m2 stops
British Airways Logo
9:15 pm - 8:18 pm
SNN
-
ONT
31h 03m2 stops
$612British Airways
Wed, Apr 15 - Mon, Apr 20
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m1 stop
United Airlines Logo
9:30 am - 10:26 pm
SNN
-
ONT
20h 56m1 stop
$630United Airlines
Thu, May 28 - Fri, Jun 5
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m1 stop
United Airlines Logo
9:30 am - 5:18 pm
SNN
-
ONT
15h 48m2 stops
$635United Airlines
Thu, May 28 - Thu, Jun 4
British Airways Logo
12:55 pm - 4:10 pm
ONT
-
SNN
19h 15m2 stops
British Airways Logo
7:40 am - 11:40 pm
SNN
-
ONT
24h 00m2 stops
$649British Airways
Tue, Apr 14 - Mon, Apr 27
American Airlines Logo
2:47 pm - 4:45 pm
ONT
-
SNN
17h 58m2 stops
American Airlines Logo
7:50 am - 6:39 pm
SNN
-
ONT
42h 49m2 stops
$659American Airlines
Thu, Feb 19 - Mon, Feb 23
British Airways Logo
10:59 am - 4:45 pm
ONT
-
SNN
21h 46m2 stops
British Airways Logo
5:30 pm - 10:49 pm
SNN
-
ONT
37h 19m2 stops
$661British Airways
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
5:00 am - 7:30 am
ONT
-
SNN
18h 30m2 stops
United Airlines Logo
9:30 am - 5:18 pm
SNN
-
ONT
15h 48m2 stops
$685United Airlines
Wed, May 27 - Sat, Jun 6

American Airlines flights from Ontario to Shannon, Clare

Our best American Airlines deals on Ontario to Shannon, Clare flight tickets
American Airlines
Jan 17
ONT7:16 amOntario
20h 14m
2 stops
SNN11:30 amShannon
Jan 24
SNN7:50 amShannon
22h 58m
2 stops
ONT10:48 pmOntario
$484
Find similar
American Airlines
Feb 19
ONT2:47 pmOntario
17h 58m
2 stops
SNN4:45 pmShannon
Feb 23
SNN7:50 amShannon
42h 49m
2 stops
ONT6:39 pmOntario
$659
Find similar
American Airlines
Dec 20
ONT2:42 pmOntario
18h 03m
2 stops
SNN4:45 pmShannon
Dec 24
SNN7:50 amShannon
46h 24m
2 stops
ONT10:14 pmOntario
$1,929
Find similar

United Airlines flights from Ontario to Shannon, Clare

Our best United Airlines deals on Ontario to Shannon, Clare flight tickets
United Airlines
May 27
ONT7:00 amOntario
16h 30m
1 stop
SNN7:30 amShannon
Jun 5
SNN9:30 amShannon
20h 56m
1 stop
ONT10:26 pmOntario
$570
Find similar
United Airlines
May 27
ONT5:00 amOntario
18h 30m
2 stops
SNN7:30 amShannon
Jun 3
SNN12:30 pmShannon
28h 33m
2 stops
ONT9:03 amOntario
$575
Find similar
United Airlines
May 28
ONT7:00 amOntario
16h 30m
1 stop
SNN7:30 amShannon
Jun 3
SNN9:30 amShannon
20h 56m
1 stop
ONT10:26 pmOntario
$630
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Shannon, Clare 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 December 4, 2025.
Use the filters below to find and compare flights from Ontario to Shannon, Clare that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 1/17

7:16 am-11:30 am

2 stops20h 14m

Shannon

Sat 1/24

7:50 am-10:48 pm

2 stops22h 58m

$484

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 5/27

7:00 am-7:30 am

1 stop16h 30m

Shannon

Fri 6/5

9:30 am-10:26 pm

1 stop20h 56m

$570

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 5/27

7:00 am-7:30 am

1 stop16h 30m

Shannon

Thu 6/4

9:30 am-8:17 pm

2 stops18h 47m

$575

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 4/15

12:55 pm-4:10 pm

2 stops19h 15m

Shannon

Mon 4/20

9:15 pm-8:18 pm

2 stops31h 03m

$612

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 5/28

7:00 am-7:30 am

1 stop16h 30m

Shannon

Fri 6/5

9:30 am-10:26 pm

1 stop20h 56m

$630

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 5/28

7:00 am-7:30 am

1 stop16h 30m

Shannon

Thu 6/4

9:30 am-5:18 pm

2 stops15h 48m

$635

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Tue 4/14

12:55 pm-4:10 pm

2 stops19h 15m

Shannon

Mon 4/27

7:40 am-11:40 pm

2 stops24h 00m

$649

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 2/19

2:47 pm-4:45 pm

2 stops17h 58m

Shannon

Mon 2/23

7:50 am-6:39 pm

2 stops42h 49m

$659

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 2/19

10:59 am-4:45 pm

2 stops21h 46m

Shannon

Mon 2/23

5:30 pm-10:49 pm

2 stops37h 19m

$661

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 5/27

5:00 am-7:30 am

2 stops18h 30m

Shannon

Sat 6/6

9:30 am-5:18 pm

2 stops15h 48m

$685

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Shannon from

How to get the cheapest flight ticket from Ontario to Shannon, Clare

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 day to depart on your flight to Shannon, Clare?

The cheapest day to depart from Ontario to Shannon, Clare is on a Friday when prices can be found for as low as $805. The most expensive day to fly to Shannon, Clare is Tuesday, with ticket prices averaging around $889.

What is the cheapest time of day to depart on your flight to Shannon, Clare?

Our data shows that the cheapest Ontario to Shannon, Clare flights are usually those with departure times in the afternoon. Our users have found flights to Shannon, Clare in the afternoon for as low as $744. Flights at noon are often more expensive with an average ticket price of $953.

When to book flights from Ontario to Shannon, Clare

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

Cheap Ontario to Shannon, Clare (ONT to SNN) flight deals and tips

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

Fastest flight time

16h 30m

Direct flights

None
The fastest flight from Ontario to Shannon, Clare takes 16h 30m
There are no direct flights from Ontario to Shannon, Clare. There are no popular flight routes from Ontario to Shannon, Clare.
Search flight deals

  • How far is Ontario to Shannon by plane?

    There are 5075.2 mi between Ontario and Shannon. A reasonable flight in good conditions will take 16h 20m.

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

    Prices for flights from Ontario Airport to Shannon Airport are updated daily.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Shannon Airport.

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

    The necessary travel and health documents for your Shannon Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Limerick
Adare
Bunratty
Ennis
Nenagh
Lahinch

Why use momondo?

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

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

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

Yes. All flights to Shannon from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Shannon.

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

If you are simply researching potential flights to Shannon, momondo offers a useful price alert feature which will track prices for flights to Shannon from Ontario and alert you when they change.

An easier way to manage your Shannon, Clare trip

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