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Shannon

$525+ Cheap flights from Ontario (ONT) to Shannon (SNN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SNN
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Ontario to Shannon

Cheapest flights from Ontario to Shannon
Explore the most affordable flight options available from Ontario to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This American Airlines deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/182:39 pm
ONT
-
SNN
2 stops19h 06m
American Airlines
Tue 3/319:15 pm
SNN
-
ONT
2 stops29h 54m
American Airlines
Deal found 1/25$525
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/301:00 pm
ONT
-
SNN
2 stops34h 30m
United Airlines
Tue 8/189:30 am
SNN
-
ONT
1 stop20h 56m
United Airlines
Deal found 1/27$634
This United Airlines deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:53 pm
ONT
-
SNN
2 stops28h 37m
United Airlines
Mon 8/179:30 am
SNN
-
ONT
1 stop20h 56m
United Airlines
Deal found 1/25$640
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/52:39 pm
ONT
-
SNN
2 stops17h 31m
British Airways
Tue 4/147:30 am
SNN
-
ONT
2 stops23h 05m
British Airways
Deal found 1/27$663
This British Airways deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/56:00 am
ONT
-
SNN
2 stops29h 25m
British Airways
Mon 3/97:50 am
SNN
-
ONT
2 stops23h 09m
British Airways
Deal found 1/24$688
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/301:00 pm
ONT
-
SNN
2 stops34h 30m
United Airlines
Mon 8/1712:30 pm
SNN
-
ONT
2 stops18h 36m
United Airlines
Deal found 1/27$694
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/291:00 pm
ONT
-
SNN
2 stops34h 30m
United Airlines
Tue 8/189:30 am
SNN
-
ONT
2 stops15h 48m
United Airlines
Deal found 1/27$696
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2210:59 am
ONT
-
SNN
2 stops16h 21m
British Airways
Sun 4/267:30 am
SNN
-
ONT
2 stops22h 29m
British Airways
Deal found 1/27$713
This United Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:00 am
ONT
-
SNN
1 stop16h 30m
United Airlines
Mon 7/209:30 am
SNN
-
ONT
2 stops18h 47m
United Airlines
Deal found 1/26$742
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:00 am
ONT
-
SNN
2 stops18h 30m
United Airlines
Thu 8/139:30 am
SNN
-
ONT
2 stops15h 48m
United Airlines
Deal found 1/27$747
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/291:00 pm
ONT
-
SNN
2 stops34h 30m
United Airlines
Mon 8/1712:30 pm
SNN
-
ONT
2 stops18h 36m
United Airlines
Deal found 1/27$756

Find flight deals from Ontario to Shannon

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Shannon (SNN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$525
(American Airlines)

Popular in

June

Cheapest in

March

Average price

$869
Provider with most accurate pricing for Ontario-Shannon flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Shannon flights.
Search Deals
From Ontario to Shannon
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($188 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Shannon 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, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
Use the filters below to find and compare flights from Ontario to Shannon that are best for you.

Fly from

Ontario

Fly to

Shannon

Route

Depart

Return

Price

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 5/30

1:00 pm-7:30 am

2 stops34h 30m

Shannon

Tue 8/18

9:30 am-10:26 pm

1 stop20h 56m

$634

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 5/30

5:00 am-7:30 am

2 stops42h 30m

Shannon

Thu 8/13

9:30 am-5:18 pm

2 stops15h 48m

$634

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 5/30

1:00 pm-7:30 am

2 stops34h 30m

Shannon

Wed 8/12

9:30 am-8:17 pm

2 stops18h 47m

$634

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 3/5

6:00 am-7:25 pm

2 stops29h 25m

Shannon

Mon 3/9

7:50 am-11:59 pm

2 stops23h 09m

$688

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 5/30

1:00 pm-7:30 am

2 stops34h 30m

Shannon

Mon 8/17

12:30 pm-11:06 pm

2 stops18h 36m

$694

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 5/29

1:00 pm-7:30 am

2 stops34h 30m

Shannon

Tue 8/18

9:30 am-5:18 pm

2 stops15h 48m

$696

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 5/29

1:00 pm-7:30 am

2 stops34h 30m

Shannon

Thu 8/13

9:30 am-5:18 pm

2 stops15h 48m

$696

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 5/29

1:00 pm-7:30 am

2 stops34h 30m

Shannon

Wed 8/12

9:30 am-5:18 pm

2 stops15h 48m

$696

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 7/15

7:00 am-7:30 am

1 stop16h 30m

Shannon

Mon 7/20

9:30 am-8:17 pm

2 stops18h 47m

$742

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Tue 6/2

6:00 am-7:30 am

2 stops17h 30m

Shannon

Thu 8/13

9:30 am-5:18 pm

2 stops15h 48m

$747

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 17 results
1
2
  • Most accurate provider: When it comes to deals on Ontario-Shannon, Clare flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Shannon, Clare flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Shannon, Clare flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Shannon, Clare flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Shannon, Clare flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Shannon

Have a flexible travel schedule? Discover the best time to fly to Shannon from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Shannon

What is the cheapest month to book a flight from Ontario to Shannon, Clare?

Currently, August is the cheapest month in which you can book a flight from Ontario to Shannon, Clare (average of $469). Flying from Ontario to Shannon, Clare in December is currently the most expensive (average of $766). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Shannon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Shannon, Clare?

    United Airlines and British Airways can get you from Ontario to Shannon, Clare in just under 29h 25m. Your travel time can differ by up to 5h 05m. Airlines will cover a distance of 5072 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Ontario to Shannon that include hotel bookings?

    Yes. In addition to deals on Ontario to Shannon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Shannon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Shannon.

  • Can I find deals for business class flights from Ontario to Shannon?

    Yes. Cheapflights offers flight deals from Ontario to Shannon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Shannon, Clare?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Shannon, Clare (average of $469). Flying from Ontario to Shannon, Clare in December is currently the most expensive (average of $766). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Ennis

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