HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Shannon

$488+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SNN
feb. 5 — feb. 121
jue. 2/5
jue. 2/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Shannon with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 enero 6, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$488
(British Airways)

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. 18% potential increase in price ($176 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

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 enero 6, 2026.

This British Airways deal was found by Cheapflights users on 1/5. 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.
jue. 3/57:00 amONT - SNN
2 stops25h 45mBritish Airways
lun. 3/98:05 pmSNN - ONT
2 stops29h 37mBritish Airways
Deal found 1/5$488
This American Airlines deal was found by Cheapflights users on 1/5. 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.
sáb. 1/3112:57 pmONT - SNN
2 stops19h 48mAmerican Airlines
dom. 2/87:50 amSNN - ONT
2 stops22h 23mAmerican Airlines
Deal found 1/5$585
This United Airlines deal was found by Cheapflights users on 1/6. 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.
mar. 9/157:00 amONT - SNN
1 stop16h 30mUnited Airlines
mar. 9/2912:30 pmSNN - ONT
2 stops18h 36mUnited Airlines
Deal found 1/6$626
This United Airlines deal was found by Cheapflights users on 1/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/77:00 amONT - SNN
1 stop16h 30mUnited Airlines
mar. 7/219:30 amSNN - ONT
2 stops18h 47mUnited Airlines
Deal found 1/4$682
This oojo deal was found by Cheapflights users on 1/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/54:54 pmONT - SNN
2 stops39h 16mBritish Airways
jue. 9/107:40 amSNN - ONT
2 stops17h 59mBritish Airways
Deal found 1/4$692
This United Airlines deal was found by Cheapflights users on 1/5. 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.
sáb. 5/236:53 pmONT - SNN
2 stops28h 37mUnited Airlines
dom. 5/319:30 amSNN - ONT
1 stop20h 56mUnited Airlines
Deal found 1/5$718
This American Airlines deal was found by Cheapflights users on 1/4. 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.
dom. 2/14:45 pmONT - SNN
2 stops16h 00mAmerican Airlines
mar. 2/177:50 amSNN - ONT
2 stops19h 55mAmerican Airlines
Deal found 1/4$753
This oojo deal was found by Cheapflights users on 1/6. 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.
jue. 7/162:22 pmONT - SNN
2 stops17h 48mBritish Airways
lun. 7/204:55 pmSNN - ONT
2 stops33h 17mBritish Airways
Deal found 1/6$906

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 enero 6, 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

jue. 3/5

7:00 am-4:45 pm

2 stops25h 45m

Shannon

lun. 3/9

8:05 pm-6:42 pm

2 stops29h 37m

$488

OntarioShannon

ONT - SNN

ONTSNN

Ontario

sáb. 1/31

12:57 pm-4:45 pm

2 stops19h 48m

Shannon

dom. 2/8

7:50 am-10:13 pm

2 stops22h 23m

$585

OntarioShannon

ONT - SNN

ONTSNN

Ontario

sáb. 5/23

6:53 pm-7:30 am

2 stops28h 37m

Shannon

dom. 5/31

9:30 am-8:17 pm

2 stops18h 47m

$742

OntarioShannon

ONT - SNN

ONTSNN

Ontario

dom. 2/1

4:45 pm-4:45 pm

2 stops16h 00m

Shannon

mar. 2/17

7:50 am-7:45 pm

2 stops19h 55m

$753

OntarioShannon

ONT - SNN

ONTSNN

Ontario

vie. 5/15

7:00 am-10:15 am

2 stops19h 15m

Shannon

sáb. 5/23

9:30 am-5:18 pm

2 stops15h 48m

$987

OntarioShannon

ONT - SNN

ONTSNN

Ontario

jue. 7/2

12:59 am-11:20 am

2 stops26h 21m

Shannon

sáb. 7/11

5:30 pm-9:51 pm

2 stops36h 21m

$1,328

OntarioShannon

ONT - SNN

ONTSNN

Ontario

vie. 5/15

11:25 pm-5:55 am

1 stop22h 30m

Shannon

sáb. 5/23

2:40 pm-10:09 pm

1 stop15h 29m

$1,388

OntarioShannon

ONT - SNN

ONTSNN

Ontario

mar. 2/3

10:58 am-4:45 pm

2 stops21h 47m

Shannon

mar. 2/10

8:05 pm-8:10 pm

2 stops32h 05m

$1,493

OntarioShannon

ONT - SNN

ONTSNN

Ontario

mié. 3/18

10:56 am-11:30 am

2 stops17h 34m

$595

OntarioShannon

ONT - SNN

ONTSNN

Ontario

jue. 3/12

5:02 pm-4:45 pm

2 stops16h 43m

$850

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/3

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 January.
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 $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?

    British Airways, American Airlines, and United Airlines can get you from Ontario to Shannon, Clare in just under 19h 48m. Your travel time can differ by up to 8h 49m. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Shannon

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Dublin flights
San Francisco to Dublin flights
San Diego to Dublin flights
Ontario to Dublin flights
Santa Ana to Dublin flights
San Jose to Dublin flights
Burbank to Dublin flights
Oakland to Dublin flights
Sacramento to Dublin flights
Las Vegas to Dublin flights
Los Angeles to Shannon flights
Fresno to Dublin flights
San Francisco to Cork flights
San Francisco to Shannon flights
Los Angeles to Cork flights
Reno to Dublin flights
San Diego to Shannon flights
San Luis Obispo to Dublin flights
Santa Ana to Shannon flights
Santa Barbara to Dublin flights
San Jose to Shannon flights
Ontario to Cork flights
Las Vegas to Shannon flights
Long Beach to Dublin flights
Santa Rosa to Dublin flights
Sacramento to Shannon flights
San Jose to Cork flights
Monterey to Dublin flights
Medford to Dublin flights
Palm Springs to Dublin flights
San Jose to Knock flights
Las Vegas to Cork flights
Oakland to Shannon flights
San Diego to Cork flights
San Francisco to Knock flights
Fresno to Shannon flights
Burbank to Shannon flights
Los Angeles to Milltown (Kerry) flights
Reno to Shannon flights
Arcata to Dublin flights
Redding to Dublin flights
Long Beach to Shannon flights
Oakland to Cork flights
Santa Rosa to Shannon flights
San Francisco to Donegal flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.