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£44 Cheap Flights from Santa Rosa (STS) to San Diego (SAN)

View £44 flight on Mon, 14 Sept 2026Opens in a new window

Popular airlines from Santa Rosa, CA (STS-Sonoma County) to San Diego Intl. Airport (SAN)

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Cheap Flights from Santa Rosa (STS) to San Diego (SAN)

Prices were available within the past 7 days and start at £44 for one-way flights and £88 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, 28 Sept - Sat, 3 Oct
STS
Santa Rosa
SAN
San Diego
£88 Return, found 5 days ago
£88
Return
found 5 days ago
Select Alaska Airlines flight, departing Mon, 28 Sept from Santa Rosa to San Diego, returning Sat, 3 Oct, priced at £88 found 5 days ago
Southwest Airlines
Sat, 5 Sept - Wed, 9 Sept
STS
Santa Rosa
SAN
San Diego
£94 Return, found 6 days ago
£94
Return
found 6 days ago
Select Southwest Airlines flight, departing Sat, 5 Sept from Santa Rosa to San Diego, returning Wed, 9 Sept, priced at £94 found 6 days ago
Alaska Airlines
Sat, 5 Sept - Wed, 9 Sept
STS
Santa Rosa
SAN
San Diego
£100 Return, found 6 days ago
£100
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 5 Sept from Santa Rosa to San Diego, returning Wed, 9 Sept, priced at £100 found 6 days ago
Alaska Airlines
Sun, 27 Sept - Sat, 3 Oct
STS
Santa Rosa
SAN
San Diego
£102 Return, found 5 days ago
£102
Return
found 5 days ago
Select Alaska Airlines flight, departing Sun, 27 Sept from Santa Rosa to San Diego, returning Sat, 3 Oct, priced at £102 found 5 days ago
American Airlines
Sat, 5 Sept - Wed, 9 Sept
STS
Santa Rosa
SAN
San Diego
£103 Return, found 6 days ago
£103
Return
found 6 days ago
Select American Airlines flight, departing Sat, 5 Sept from Santa Rosa to San Diego, returning Wed, 9 Sept, priced at £103 found 6 days ago
Southwest Airlines
Sat, 5 Sept - Wed, 9 Sept
STS
Santa Rosa
SAN
San Diego
£108 Return, found 6 days ago
£108
Return
found 6 days ago
Select Southwest Airlines flight, departing Sat, 5 Sept from Santa Rosa to San Diego, returning Wed, 9 Sept, priced at £108 found 6 days ago
Southwest Airlines
Sat, 5 Sept - Wed, 9 Sept
STS
Santa Rosa
SAN
San Diego
£109 Return, found 6 days ago
£109
Return
found 6 days ago
Select Southwest Airlines flight, departing Sat, 5 Sept from Santa Rosa to San Diego, returning Wed, 9 Sept, priced at £109 found 6 days ago
Alaska Airlines
Sat, 5 Sept - Wed, 9 Sept
STS
Santa Rosa
SAN
San Diego
£110 Return, found 6 days ago
£110
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 5 Sept from Santa Rosa to San Diego, returning Wed, 9 Sept, priced at £110 found 6 days ago
Alaska Airlines
Sat, 5 Sept - Wed, 9 Sept
STS
Santa Rosa
SAN
San Diego
£113 Return, found 6 days ago
£113
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 5 Sept from Santa Rosa to San Diego, returning Wed, 9 Sept, priced at £113 found 6 days ago
Alaska Airlines
Sat, 5 Sept - Wed, 9 Sept
STS
Santa Rosa
SAN
San Diego
£115 Return, found 6 days ago
£115
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 5 Sept from Santa Rosa to San Diego, returning Wed, 9 Sept, priced at £115 found 6 days ago

Find the cheapest month to fly from Santa Rosa (STS) to San Diego (SAN)

September is typically the cheapest month to fly

From £72 - £127 per traveller.

Frequently asked questions

How much does a flight from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) cost?
You can find cheap one-way flights from £44 and cheap return flights from £88 STS to SAN with Expedia. One-way flights typically cost between £181 and £269. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when STS to SAN ticket fares go up or down.
What is the cheapest month to fly from Santa Rosa, CA (STS) to San Diego, CA (SAN)?
The cheapest months to fly from Santa Rosa, CA (STS) to San Diego, CA (SAN) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
Only one airline offers direct flights from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.). Southwest Airlines operates 11 direct flights from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) every week.
What is the cheapest airline that flies from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
Alaska Airlines is one of the cheapest airlines offering nonstop return flights from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.), with tickets starting from around £167 for flights that can be booked for departure within the next year. Alaska Airlines also offers one of the cheapest connecting return flights on this route, with tickets starting from around £186. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Santa Rosa, CA (STS) to San Diego, CA (SAN)?
To find a cheap flight from Santa Rosa, CA (STS) to San Diego, CA (SAN), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
The cheapest months to fly from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) are typically January and February, with return flights averaging around £164. These months are ideal if you're looking for the most budget-friendly options to visit San Diego.
What is the earliest flight from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
The earliest flight from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) typically departs around 6:00 AM local time. This service is operated by Alaska Airlines and is seasonal, active in June, July, August, September, and October. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
When flying from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.), you have a few options. A non-stop flight typically takes around 1 hour 48 minutes, covering a distance of approximately 818 kilometers. If you opt for a flight with one stop, your journey will usually be longer, taking about 5 hours 18 minutes. For flights with two or more stops, expect the travel time to increase further, often around 11 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.
Can you fly business or first class from Santa Rosa, CA (STS) to San Diego, CA (SAN)?
Select the "Business class" and "First class" filters when looking for Santa Rosa, CA (STS) to San Diego, CA (SAN) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) flight with Expedia?
It's easy to earn miles on a Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Diego, CA (SAN) from Santa Rosa, CA (STS)?
If you're planning to travel to San Diego from Sonoma County (STS), you can fly directly into San Diego Intl. (SAN). Some flights may connect through major hubs like Los Angeles Intl. (LAX), Bob Hope (BUR), or Harry Reid International Airport (LAS) before reaching San Diego. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) at the last minute?
Typically, booking a last minute flight from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) flight and hotel package?
Securing a Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities 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 Santa Rosa, CA (STS) to San Diego, CA (SAN)?
If you booked your Santa Rosa, CA (STS) to San Diego, CA (SAN) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Sonoma County
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines
Roundtrip price
£87
Distance
813 km
Average flight time
1 hour 44 mins

Book with confidence

Compare flights from Santa Rosa to San Diego easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Santa Rosa to San Diego. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to San Diego Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Sonoma County to San Diego Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Sonoma County (STS) to San Diego Intl. (SAN)

The easiest way to view the best deals on flights from Santa Rosa to San Diego today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Sonoma County to San Diego Intl. start at just £88 and range up to £115.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Santa Rosa and San Diego
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Santa Rosa to San Diego flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Sonoma County to San Diego Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Santa Rosa to San Diego easily and book with confidence

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*Available to Expedia members.