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Shannon

$542+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SNN
Jan 29 — Feb 51
Thu 1/29
Thu 2/5
1 adult, Economy
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Cheap flight deals from Ontario to Shannon

Best flights from Ontario to Shannon
Discover carefully curated flight deals from Ontario to Shannon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 30, 2025.

This United Airlines deal was found by Cheapflights users on 12/28. 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 4/147:00 amONT - SNN
2 stops19h 15mUnited Airlines
Mon 4/2712:30 pmSNN - ONT
2 stops16h 06mUnited Airlines
Deal found 12/28$542
This oojo deal was found by Cheapflights users on 12/29. 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.
Mon 3/22:39 pmONT - SNN
2 stops18h 06mBritish Airways
Fri 3/137:50 amSNN - ONT
2 stops23h 09mBritish Airways
Deal found 12/29$725
This American Airlines deal was found by Cheapflights users on 12/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2112:26 pmONT - SNN
2 stops21h 19mAmerican Airlines
Sat 3/282:45 pmSNN - ONT
2 stops27h 43mAmerican Airlines
Deal found 12/27$797
This Ovago deal was found by Cheapflights users on 12/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1611:25 pmONT - SNN
1 stop22h 30mJetBlue
Mon 5/252:40 pmSNN - ONT
1 stop15h 29mJetBlue
Deal found 12/29$1,439
This British Airways deal was found by Cheapflights users on 12/27. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:59 amONT - SNN
2 stops24h 26mBritish Airways
Mon 3/98:05 pmSNN - ONT
2 stops33h 43mBritish Airways
Deal found 12/27$775
This oojo deal was found by Cheapflights users on 12/29. 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 5/1612:19 pmONT - SNN
2 stops19h 46mBritish Airways
Mon 5/259:15 pmSNN - ONT
2 stops34h 41mBritish Airways
Deal found 12/29$877
This oojo deal was found by Cheapflights users on 12/27. 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.
Sat 3/215:02 pmONT - SNN
2 stops16h 43mBritish Airways
Sat 3/285:25 pmSNN - ONT
2 stops29h 57mBritish Airways
Deal found 12/27$1,079

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 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$542
(United Airlines)

Popular in

December

Cheapest in

March

Average price

$1,405
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. 15% potential increase in price ($157 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($51 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 30, 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

Tue 4/14

7:00 am-10:15 am

2 stops19h 15m

Shannon

Mon 4/27

12:30 pm-8:36 pm

2 stops16h 06m

$542

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 3/2

2:39 pm-4:45 pm

2 stops18h 06m

Shannon

Fri 3/13

7:50 am-11:59 pm

2 stops23h 09m

$725

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 3/5

10:59 am-7:25 pm

2 stops24h 26m

Shannon

Mon 3/9

8:05 pm-10:48 pm

2 stops33h 43m

$775

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 3/21

12:26 pm-4:45 pm

2 stops21h 19m

Shannon

Sat 3/28

2:45 pm-11:28 am

2 stops27h 43m

$797

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 5/16

12:19 pm-4:05 pm

2 stops19h 46m

Shannon

Mon 5/25

9:15 pm-11:56 pm

2 stops34h 41m

$877

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 3/21

5:02 pm-4:45 pm

2 stops16h 43m

Shannon

Sat 3/28

5:25 pm-4:22 pm

2 stops29h 57m

$1,079

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 5/16

11:25 pm-5:55 am

1 stop22h 30m

Shannon

Mon 5/25

2:40 pm-10:09 pm

1 stop15h 29m

$1,439

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 2/11

4:45 pm-4:45 pm

2 stops16h 00m

$595

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sun 2/8

7:16 am-4:45 pm

2 stops25h 29m

$616

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Thu 3/19

5:02 pm-4:45 pm

2 stops16h 43m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/28

Showing 1-10 of 12 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 December is currently the most expensive (average of $905). 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, British Airways, and American Airlines can get you from Ontario to Shannon, Clare in just under 18h 06m. Your travel time can differ by up to 3h 13m. 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 $905). 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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