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Shannon

$438+ 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SNN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$576
(United Airlines)

One-way from

$438
(United Airlines)

Popular in

December

Cheapest in

March

Average price

$793
From Ontario to Shannon
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One-way flight from Ontario to Shannon
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Highest demand for flights based on searches. 18% potential increase in price ($195 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($66 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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 10/86:00 amONT - SNN
2 stops20h 15mUnited Airlines
Wed 10/1512:30 pmSNN - ONT
2 stops18h 22mUnited Airlines
Deal found 9/10$576
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/119:36 amONT - SNN
2 stops16h 39mUnited Airlines
Mon 10/2012:30 pmSNN - ONT
2 stops16h 54mUnited Airlines
Deal found 9/11$672
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/97:00 amONT - SNN
1 stop16h 30mUnited Airlines
Tue 9/169:30 amSNN - ONT
1 stop21h 00mUnited Airlines
Deal found 9/9$827
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/309:36 amONT - SNN
2 stops16h 39mUnited Airlines
Sun 10/512:30 pmSNN - ONT
2 stops16h 54mUnited Airlines
Deal found 9/10$947
This British Airways deal was found by Cheapflights users on 9/9. 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.
Mon 9/226:10 amONT - SNN
2 stops21h 10mBritish Airways
Mon 9/297:40 amSNN - ONT
2 stops22h 08mBritish Airways
Deal found 9/9$1,033
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/247:00 amONT - SNN
2 stops19h 15mUnited Airlines
Sat 9/2712:30 pmSNN - ONT
2 stops18h 22mUnited Airlines
Deal found 9/10$1,052
This British Airways deal was found by Cheapflights users on 9/9. 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.
Wed 9/102:54 pmONT - SNN
2 stops17h 16mBritish Airways
Wed 9/177:40 amSNN - ONT
2 stops18h 36mBritish Airways
Deal found 9/9$1,154
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/137:00 amONT - SNN
1 stop16h 30mUnited Airlines
Sun 9/149:30 amSNN - ONT
1 stop21h 00mUnited Airlines
Deal found 9/9$15,976

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 September 11, 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

Wed 10/8

6:00 am-10:15 am

2 stops20h 15m

Shannon

Wed 10/15

12:30 pm-10:52 pm

2 stops18h 22m

$576

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Sat 10/11

9:36 am-10:15 am

2 stops16h 39m

Shannon

Mon 10/20

12:30 pm-10:52 pm

2 stops18h 22m

$672

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Tue 9/30

9:36 am-10:15 am

2 stops16h 39m

Shannon

Sun 10/5

12:30 pm-9:24 pm

2 stops16h 54m

$947

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Mon 9/22

6:10 am-11:20 am

2 stops21h 10m

Shannon

Mon 9/29

7:40 am-9:48 pm

2 stops22h 08m

$1,033

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 10/17

9:36 am-10:15 am

2 stops16h 39m

$438

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 9/19

11:55 am-11:10 am

2 stops15h 15m

$4,977

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Wed 9/24

2:54 pm-4:10 pm

2 stops17h 16m

$9,847

OntarioShannon

ONT - SNN

ONTSNN

Ontario

Fri 9/19

7:00 am-7:30 am

1 stop16h 30m

$13,913

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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, February is the cheapest month in which you can book a flight from Ontario to Shannon, Clare (average of $533). Flying from Ontario to Shannon, Clare in June is currently the most expensive (average of $926). 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 can get you from Ontario to Shannon, Clare in just under 20h 15m. Your travel time can differ by up to . Airlines will cover a distance of 5072 mi.

  • What are the cheapest airlines to fly from Ontario to Shannon, Clare one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $438. However, be on the lookout for offers from Air France and British Airways, as they are both options that can get you from Ontario to Shannon, Clare for a low price.

  • 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, February is the cheapest month in which you can book a flight from Ontario to Shannon, Clare (average of $533). Flying from Ontario to Shannon, Clare in June is currently the most expensive (average of $926). 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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