$435 Cheap Flights from San Francisco (SFO) to Shannon (SNN)

View $435 flight on Tue, May 19, 2026Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to Shannon Airport (SNN)

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Cheap Flights from San Francisco to Shannon (SFO-SNN)

Prices were available within the past 7 days and start at $435 for one-way flights and $584 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Apr 13 - Tue, Apr 21
SFO
San Francisco
SNN
Shannon
$584 Roundtrip, found 9 hours ago
$584
Roundtrip
found 9 hours ago
Select United flight, departing Mon, Apr 13 from San Francisco to Shannon, returning Tue, Apr 21, priced at $584 found 9 hours ago
United
Mon, Apr 13 - Tue, Apr 21
SFO
San Francisco
SNN
Shannon
$589 Roundtrip, found 9 hours ago
$589
Roundtrip
found 9 hours ago
Select United flight, departing Mon, Apr 13 from San Francisco to Shannon, returning Tue, Apr 21, priced at $589 found 9 hours ago
United
Wed, Apr 15 - Tue, Apr 21
SFO
San Francisco
SNN
Shannon
$591 Roundtrip, found 5 days ago
$591
Roundtrip
found 5 days ago
Select United flight, departing Wed, Apr 15 from San Francisco to Shannon, returning Tue, Apr 21, priced at $591 found 5 days ago
United
Tue, Apr 14 - Tue, Apr 21
SFO
San Francisco
SNN
Shannon
$593 Roundtrip, found 15 hours ago
$593
Roundtrip
found 15 hours ago
Select United flight, departing Tue, Apr 14 from San Francisco to Shannon, returning Tue, Apr 21, priced at $593 found 15 hours ago
United
Sat, Apr 4 - Fri, Apr 17
SFO
San Francisco
SNN
Shannon
$595 Roundtrip, found 4 days ago
$595
Roundtrip
found 4 days ago
Select United flight, departing Sat, Apr 4 from San Francisco to Shannon, returning Fri, Apr 17, priced at $595 found 4 days ago
United
Tue, Apr 14 - Tue, Apr 21
SFO
San Francisco
SNN
Shannon
$600 Roundtrip, found 15 hours ago
$600
Roundtrip
found 15 hours ago
Select United flight, departing Tue, Apr 14 from San Francisco to Shannon, returning Tue, Apr 21, priced at $600 found 15 hours ago
Delta
Sat, Aug 1 - Sat, Aug 8
SFO
San Francisco
SNN
Shannon
$714 Roundtrip, found 13 hours ago
$714
Roundtrip
found 13 hours ago
Select Delta flight, departing Sat, Aug 1 from San Francisco to Shannon, returning Sat, Aug 8, priced at $714 found 13 hours ago
American Airlines
Mon, Feb 16 - Sun, Feb 22
SFO
San Francisco
SNN
Shannon
$719 Roundtrip, just found
$719
Roundtrip
just found
Select American Airlines flight, departing Mon, Feb 16 from San Francisco to Shannon, returning Sun, Feb 22, priced at $719 just found
Air Canada
Tue, Feb 17 - Wed, Feb 25
SFO
San Francisco
SNN
Shannon
$719 Roundtrip, found 3 hours ago
$719
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Tue, Feb 17 from San Francisco to Shannon, returning Wed, Feb 25, priced at $719 found 3 hours ago
British Airways
Mon, Feb 16 - Sun, Feb 22
SFO
San Francisco
SNN
Shannon
$721 Roundtrip, just found
$721
Roundtrip
just found
Select British Airways flight, departing Mon, Feb 16 from San Francisco to Shannon, returning Sun, Feb 22, priced at $721 just found

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 $839
SNN
Shannon Airport
CheapestClosest
Average driving time to city center7 min
Flights from $839

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Shannon Airport (SNN) cost?
Get a cheap one-way flight from $435 or cheap return flight from $584 from San Francisco Intl. Airport (SFO) to Shannon Airport (SNN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to Shannon Airport (SNN)?
Flying in April is a good way to save, as it's the cheapest month for flights between SFO and SNN. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to Shannon Airport (SNN)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from SFO to SNN. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from San Francisco Intl. Airport (SFO) to Shannon Airport (SNN)?
You'll need to hop on a flight with a layover when traveling from San Francisco Intl. Airport (SFO) to Shannon Airport (SNN). There are no daily direct flights on this route. However, just filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from SFO to SNN?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Shannon Airport (SNN)?
To touch down at Shannon Airport (SNN) on schedule, choose a flight that leaves from San Francisco Intl. Airport (SFO) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 San Francisco Intl. Airport (SFO) to Shannon Airport (SNN) last-minute?
Last-minute bookings from SFO to SNN are generally more expensive. To lock in the best prices, start looking for flights well in advance. That being said, if your travel plans are flexible, you may find a cheap ticket right before your trip.
Is it cheaper to book a SFO to SNN flight and hotel package?
Booking a SFO to SNN flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Pick from our wide range of stays and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Shannon Airport (SNN)?
In most instances, you're able to cancel or reschedule your SFO to SNN flight. However, additional charges may apply, especially if you booked over 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you need more details, go to our Customer Service portal.

Travel information

Origin airport
San Francisco Intl.
Destination airport
Shannon
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, JetBlue Airways, KLM, Lufthansa, United
Roundtrip price
$584
Distance
5035 mi

Book with confidence

San Francisco to Shannon Flights

The cheapest times to fly from San Francisco 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 Francisco to Shannon are during the month of April. You can find some of the cheapest flights from San Francisco to Shannon with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from San Francisco 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 Francisco 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 Francisco to Shannon in 2025. You can also book with separate airlines for your outbound and return journeys, from $435 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 Francisco 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 Francisco 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.

 

San Francisco to Shannon Flights

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