$427 Cheap Flights from San Jose (SJC) to Shannon (SNN)

View $427 flight on Sun, Sep 14, 2025Opens in a new window

Popular airlines from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN)

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Cheap Flights from San Jose to Shannon (SJC-SNN)

Prices were available within the past 7 days and start at $427 for one-way flights and $633 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 9 - Wed, Oct 1
SJC
San Jose
SNN
Shannon
$633 Roundtrip, found 4 days ago
$633
Roundtrip
found 4 days ago
Select United flight, departing Tue, Sep 9 from San Jose to Shannon, returning Wed, Oct 1, priced at $633 found 4 days ago
United
Tue, Sep 2 - Fri, Sep 19
SJC
San Jose
SNN
Shannon
$640 Roundtrip, found 4 days ago
$640
Roundtrip
found 4 days ago
Select United flight, departing Tue, Sep 2 from San Jose to Shannon, returning Fri, Sep 19, priced at $640 found 4 days ago
United
Tue, Sep 2 - Thu, Sep 25
SJC
San Jose
SNN
Shannon
$644 Roundtrip, found 4 days ago
$644
Roundtrip
found 4 days ago
Select United flight, departing Tue, Sep 2 from San Jose to Shannon, returning Thu, Sep 25, priced at $644 found 4 days ago
United
Sat, Sep 13 - Wed, Oct 1
SJC
San Jose
SNN
Shannon
$645 Roundtrip, found 4 days ago
$645
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 13 from San Jose to Shannon, returning Wed, Oct 1, priced at $645 found 4 days ago
United
Sat, Sep 6 - Fri, Sep 19
SJC
San Jose
SNN
Shannon
$656 Roundtrip, found 4 days ago
$656
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 6 from San Jose to Shannon, returning Fri, Sep 19, priced at $656 found 4 days ago
United
Tue, Sep 2 - Sun, Sep 21
SJC
San Jose
SNN
Shannon
$657 Roundtrip, found 4 days ago
$657
Roundtrip
found 4 days ago
Select United flight, departing Tue, Sep 2 from San Jose to Shannon, returning Sun, Sep 21, priced at $657 found 4 days ago
Delta
Tue, Aug 26 - Tue, Sep 2
SJC
San Jose
SNN
Shannon
$675 Roundtrip, found 4 days ago
$675
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Aug 26 from San Jose to Shannon, returning Tue, Sep 2, priced at $675 found 4 days ago
American Airlines
Sat, Feb 14 - Tue, Feb 24
SJC
San Jose
SNN
Shannon
$783 Roundtrip, found 4 days ago
$783
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Feb 14 from San Jose to Shannon, returning Tue, Feb 24, priced at $783 found 4 days ago
British Airways
Sat, Feb 14 - Tue, Feb 24
SJC
San Jose
SNN
Shannon
$828 Roundtrip, found 4 days ago
$828
Roundtrip
found 4 days ago
Select British Airways flight, departing Sat, Feb 14 from San Jose to Shannon, returning Tue, Feb 24, priced at $828 found 4 days ago
Air France
Tue, Aug 26 - Tue, Sep 2
SJC
San Jose
SNN
Shannon
$871 Roundtrip, found 4 days ago
$871
Roundtrip
found 4 days ago
Select Air France flight, departing Tue, Aug 26 from San Jose to Shannon, returning Tue, Sep 2, priced at $871 found 4 days ago

Alternative airports near Shannon

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Shannon Airport SNN. Cheapest and Closest option available. Average driving time to city center is 7 minutes. Flights from $669
SNN
Shannon Airport
CheapestClosest
Average driving time to city center7 min
Flights from $669
Flights from San Jose (SJC) to Shannon (SNN)
Origin airport
Norman Y. Mineta San Jose Intl.
Destination airport
Shannon
Airlines serving
British Airways
Roundtrip price
$633
Distance
5034 mi

San Jose to Shannon Flights

The cheapest times to fly from San Jose to Shannon

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Jose to Shannon are during the month of September. You can find some of the cheapest flights from San Jose to Shannon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Jose to Shannon

Sunday is one of the best days to book for cheap flights from San Jose to Shannon: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Jose to Shannon

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Jose to Shannon in 2025. You can also book with separate airlines for your outbound and return journeys, from $427 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Jose to Shannon flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Jose to Shannon airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN) cost?
Lock in a cheap one-way flight from $427 or cheap return flight from $633 from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN)?
September is the least expensive month to fly from SJC to SNN. Traveling during quieter months is often the key to finding a great deal.
What is the cheapest airline that flies from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN)?
To find the cheapest airline flying from SJC to SNN, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN)?
There are no daily direct flights from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from SJC to SNN?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN)?
To avoid potential delays on the Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN) route, travel before 3 PM. Later flights are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN) last-minute?
Booking your plane ticket from SJC to SNN just before your trip is generally more expensive. But if you're flexible with your travel times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a SJC to SNN flight and hotel package?
You'll generally save money by securing a SJC to SNN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After selecting your preferred accommodations and flights, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Norman Y. Mineta San Jose Intl. Airport (SJC) to Shannon Airport (SNN)?
Typically, it's possible to reschedule or cancel your SJC to SNN flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.