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Cheap flights from Ontario to Shannon from $429

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 8/17. 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.
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 6:19 pm
SNN
-
ONT
16h 49m
1 stop
$791United Airlines
Sun, Sep 6 - Wed, Sep 9
United Airlines Logo
5:00 am - 10:15 am
ONT
-
SNN
21h 15m
2 stops
United Airlines Logo
12:30 pm - 9:59 pm
SNN
-
ONT
17h 29m
2 stops
$796United Airlines
Sun, Sep 6 - Wed, Sep 9
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 6:19 pm
SNN
-
ONT
16h 49m
1 stop
$841United Airlines
Wed, Aug 12 - Wed, Aug 26
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 6:19 pm
SNN
-
ONT
16h 49m
1 stop
$900United Airlines
Mon, Aug 17 - Sat, Aug 22
United Airlines Logo
6:00 am - 10:15 am
ONT
-
SNN
20h 15m
2 stops
United Airlines Logo
9:30 am - 8:01 pm
SNN
-
ONT
18h 31m
2 stops
$905United Airlines
Mon, Aug 17 - Sat, Aug 22
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 7:57 pm
SNN
-
ONT
18h 27m
1 stop
$926United Airlines
Mon, Aug 17 - Sat, Aug 22
United Airlines Logo
6:10 am - 7:30 am
ONT
-
SNN
17h 20m
1 stop
United Airlines Logo
9:30 am - 10:51 pm
SNN
-
ONT
21h 21m
1 stop
$957United Airlines
Fri, Jul 24 - Wed, Jul 29
United Airlines Logo
5:45 am - 10:15 am
ONT
-
SNN
20h 30m
2 stops
United Airlines Logo
9:30 am - 10:51 pm
SNN
-
ONT
21h 21m
1 stop
$962United Airlines
Sun, Jul 19 - Sun, Aug 2
United Airlines Logo
7:00 am - 7:30 am
ONT
-
SNN
16h 30m
1 stop
United Airlines Logo
9:30 am - 6:19 pm
SNN
-
ONT
16h 49m
1 stop
$998United Airlines
Mon, Aug 17 - Sat, Aug 22
United Airlines Logo
5:45 am - 7:30 am
ONT
-
SNN
17h 45m
2 stops
United Airlines Logo
9:30 am - 6:19 pm
SNN
-
ONT
16h 49m
1 stop
$1,003United Airlines
Mon, Aug 17 - Sat, Aug 22

United Airlines flights from Ontario to Shannon, Clare

Our best United Airlines deals on Ontario to Shannon, Clare flight tickets
United Airlines
Sep 6
ONT7:00 amOntario
16h 30m
1 stop
SNN7:30 amShannon
Sep 9
SNN9:30 amShannon
16h 49m
1 stop
ONT6:19 pmOntario
$791
United Airlines
Sep 6
ONT5:00 amOntario
21h 15m
2 stops
SNN10:15 amShannon
Sep 9
SNN12:30 pmShannon
17h 29m
2 stops
ONT9:59 pmOntario
$796
United Airlines
Aug 12
ONT7:00 amOntario
16h 30m
1 stop
SNN7:30 amShannon
Aug 26
SNN9:30 amShannon
16h 49m
1 stop
ONT6:19 pmOntario
$841

British Airways flights from Ontario to Shannon, Clare

Our best British Airways deals on Ontario to Shannon, Clare flight tickets
British Airways
Aug 12
ONT2:27 pmOntario
17h 43m
2 stops
SNN4:10 pmShannon
Aug 26
SNN7:30 amShannon
18h 45m
2 stops
ONT6:15 pmOntario
$1,064
British Airways
Jul 7
ONT2:15 pmOntario
17h 55m
2 stops
SNN4:10 pmShannon
Sep 9
SNN7:30 amShannon
18h 18m
2 stops
ONT5:48 pmOntario
$1,121
British Airways
Sep 13
ONT2:22 pmOntario
17h 48m
2 stops
SNN4:10 pmShannon
Sep 19
SNN7:30 amShannon
19h 27m
2 stops
ONT6:57 pmOntario
$1,571

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 May 10, 2026.
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

Cheapest round-trip
Quickest round-trip

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sun 9/6

7:00 am-7:30 am

1 stop16h 30m

Shannon

Wed 9/9

9:30 am-6:19 pm

1 stop16h 49m

$791

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sun 9/6

5:00 am-10:15 am

2 stops21h 15m

Shannon

Wed 9/9

12:30 pm-9:59 pm

2 stops17h 29m

$796

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 8/12

7:00 am-7:30 am

1 stop16h 30m

Shannon

Wed 8/26

9:30 am-6:19 pm

1 stop16h 49m

$841

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 8/17

7:00 am-7:30 am

1 stop16h 30m

Shannon

Sat 8/22

9:30 am-6:19 pm

1 stop16h 49m

$900

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 8/17

6:00 am-10:15 am

2 stops20h 15m

Shannon

Sat 8/22

9:30 am-8:01 pm

2 stops18h 31m

$905

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 8/17

7:00 am-7:30 am

1 stop16h 30m

Shannon

Sat 8/22

9:30 am-7:57 pm

1 stop18h 27m

$926

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 7/24

6:10 am-7:30 am

1 stop17h 20m

Shannon

Wed 7/29

9:30 am-10:51 pm

1 stop21h 21m

$957

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sun 7/19

5:45 am-10:15 am

2 stops20h 30m

Shannon

Sun 8/2

9:30 am-10:51 pm

1 stop21h 21m

$962

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 8/17

7:00 am-7:30 am

1 stop16h 30m

Shannon

Sat 8/22

9:30 am-6:19 pm

1 stop16h 49m

$998

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 8/17

5:45 am-7:30 am

2 stops17h 45m

Shannon

Sat 8/22

9:30 am-6:19 pm

1 stop16h 49m

$1,003

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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 airline that flies from Ontario to Shannon?

United Airlines is the most popular carrier operating from Ontario to Shannon

What airlines fly to Shannon, Clare?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Shannon, Clare from Ontario according to our data. American Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Shannon, Clare. Keep in mind that there are 5 different airlines that fly to Shannon, Clare on a routine basis, so you have a few additional options to choose from.

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 21m

Direct flights

None
The fastest flight from Ontario to Shannon, Clare takes 16h 21m
There are no direct flights from Ontario to Shannon, Clare. There are no popular flight routes from Ontario to Shannon, Clare.
Search flight deals

Frequently asked questions about flying from Ontario to Shannon, Clare

  • 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 21m.

  • 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
Bunratty
Ennis
Adare
Lahinch
Nenagh

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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