The cheapest times to fly from STS to SNN are

  • January 8th to March 11th (except the week of February 12th)
  • March 26th to May 13th (except the week of April 2nd)
  • August 6th to October 14th (except the weeks of August 27th and September 3rd)
  • November 5th to December 9th (except the week of November 19th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from STS to SNN is early October. Prices can be as high as $2748 for Saturday flights during mid December, or as low as $1075 for Wednesday flights around early October.


When to Fly to Shannon

Flying from Santa Rosa, CA (STS) to Shannon (SNN) will usually cost between $1327 to $2105 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early October with an average ticket price of $1233. Due to high demand the most expensive time to fly is mid December, with an average price of $1932. Planning your trip to low-cost times can easily save you $699 on economy flights and even more on first-class flights. Generally, any price below $1495 can be considered a good price for a round-trip STS to SNN flight.

See below for a graph of average weekly prices for the STS to SNN route. All prices are for round-trip tickets in USD.

STS to SNN Flight Prices

Compared to other flights, the STS to SNN flight is slightly more expensive than the average and costs slightly more than the average flight leaving from Santa Rosa. The average price per mile (for a direct flight) is $0.19, which is below average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to fly to SNN, and Tuesday the cheapest day to fly back into STS. Saturdays are the most expensive days to fly to Shannon, and Sundays are the most expensive days to return to Santa Rosa. Selecting flights on the least expensive days could save you up to $254 (14%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $1451. Return trip prices are from the SNN to STS flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from STS to SNN can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 9 hour 59 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from STS to SNN while comparing.

Destination alternative #1: Dublin Airport (DUB) in Dublin

  • 121 miles (195 km) away from SNN
  • Usually 10.27% less expensive than SNN
  • 1-layover flights available

See STS to DUB flights


Flight Hacking STS to SNN

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from STS to SNN — but Champion Traveler does!

Hack #1: Los Angeles, CA (STS > LAX > SNN)

  • Price for both tickets: $875
  • Average savings: $621 (41.51%)

See STS to LAX flights

Hack #2: Seattle, WA (STS > SEA > SNN)

  • Price for both tickets: $967
  • Average savings: $529 (35.35%)

See STS to SEA flights

Hack #3: Boston, MA (STS > BOS > SNN)

  • Price for both tickets: $1018
  • Average savings: $477 (31.91%)

See STS to BOS flights


Flight Questions Answered

Still have questions about flying from STS to SNN? We’ve got answers.

Which airlines fly this route?

You can find 13 major airlines flying this route most often: Aer Lingus, Air France, Alaska, American, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, SAS, Singapore Airlines, United, and potentially more during busy seasons.

How far away is it from Shannon Airport to Charles M. Schulz – Sonoma County Airport?

The distance between the two airports is roughly 4998 miles or 8043 kilometers.

How long does it take to fly from STS to SNN?

The real-world flight time for a nonstop STS to SNN flight is about 9 hour 59 minutes.

How many flights go between Santa Rosa, CA and Shannon?

It depends on the day of the week and the date, but a typical day might have around 12 available flights from STS to SNN.


Airport Location Info


Departing Airport

Origination codeSTS
Origination airport nameCharles M. Schulz – Sonoma County Airport
CitySanta Rosa, CA
Countrythe United States

Return Airport

Destination codeSNN
Destination airport nameShannon Airport


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.