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Shannon

$453+ Cheap flights from Ontario (ONT) to Shannon (SNN)

This is the cheapest one-way 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
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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 December 4, 2025.

This British Airways deal was found by Cheapflights users on 12/2. 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 12/2512:55 pmONT - SNN
2 stops19h 50mBritish Airways
Tue 12/308:05 pmSNN - ONT
2 stops30h 11mBritish Airways
Deal found 12/2$1,649
This American Airlines deal was found by Cheapflights users on 12/4. 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.
Sat 12/202:42 pmONT - SNN
2 stops18h 03mAmerican Airlines
Wed 12/247:50 amSNN - ONT
2 stops46h 24mAmerican Airlines
Deal found 12/4$1,929
This oojo deal was found by Cheapflights users on 12/3. 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.
Sat 12/274:47 pmONT - SNN
2 stops18h 38mBritish Airways
Thu 1/17:50 amSNN - ONT
2 stops21h 08mBritish Airways
Deal found 12/3$2,265

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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$484
(American Airlines)

One-way from

$453
(oojo)

Popular in

December

Cheapest in

March

Average price

$1,752
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
One-way flight from Ontario to Shannon
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($281 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($78 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 4, 2025.
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 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-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

Wed 6/3

9:30 am-10:26 pm

1 stop20h 56m

$570

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 4/22

12:55 pm-4:10 pm

2 stops19h 15m

Shannon

Mon 4/27

9:15 pm-8:18 pm

2 stops31h 03m

$612

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

Thu 6/4

9:30 am-10:26 pm

1 stop20h 56m

$630

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 5/29

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

Wed 3/18

10:56 am-11:30 am

2 stops17h 34m

$453

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 2/23

3:19 pm-4:45 pm

2 stops17h 26m

$467

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 18 results
1
2

Compare providers for flights from Ontario to Shannon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Shannon in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Shannon, Clare flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Shannon, Clare flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 June is currently the most expensive (average of $761). 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?

    American Airlines and United Airlines can get you from Ontario to Shannon, Clare in just under 16h 30m. Your travel time can differ by up to 3h 44m. 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 June is currently the most expensive (average of $761). 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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