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$69 Cheap Flights from Santa Rosa (STS) to San Diego (SAN)

View $69 flight on Thu, Oct 29, 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 to San Diego (STS-SAN)

Prices were available within the past 7 days and start at $69 for one-way flights and $148 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Jan 30 - Mon, Feb 1
STS
Santa Rosa
SAN
San Diego
$148 Roundtrip, found 9 hours ago
$148
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Sat, Jan 30 from Santa Rosa to San Diego, returning Mon, Feb 1, priced at $148 found 9 hours ago
Southwest Airlines
Thu, Dec 3 - Sat, Dec 5
STS
Santa Rosa
SAN
San Diego
$152 Roundtrip, found 10 hours ago
$152
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Thu, Dec 3 from Santa Rosa to San Diego, returning Sat, Dec 5, priced at $152 found 10 hours ago
Southwest Airlines
Sat, Oct 24 - Sat, Oct 31
STS
Santa Rosa
SAN
San Diego
$157 Roundtrip, just found
$157
Roundtrip
just found
Select Southwest Airlines flight, departing Sat, Oct 24 from Santa Rosa to San Diego, returning Sat, Oct 31, priced at $157 just found
Southwest Airlines
Wed, Oct 21 - Mon, Oct 26
STS
Santa Rosa
SAN
San Diego
$157 Roundtrip, just found
$157
Roundtrip
just found
Select Southwest Airlines flight, departing Wed, Oct 21 from Santa Rosa to San Diego, returning Mon, Oct 26, priced at $157 just found
American Airlines
Wed, Jan 27 - Sun, Jan 31
STS
Santa Rosa
SAN
San Diego
$158 Roundtrip, found 9 hours ago
$158
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Wed, Jan 27 from Santa Rosa to San Diego, returning Sun, Jan 31, priced at $158 found 9 hours ago
American Airlines
Sat, Jan 30 - Mon, Feb 1
STS
Santa Rosa
SAN
San Diego
$159 Roundtrip, found 9 hours ago
$159
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sat, Jan 30 from Santa Rosa to San Diego, returning Mon, Feb 1, priced at $159 found 9 hours ago
Southwest Airlines
Thu, Nov 19 - Fri, Nov 27
STS
Santa Rosa
SAN
San Diego
$161 Roundtrip, just found
$161
Roundtrip
just found
Select Southwest Airlines flight, departing Thu, Nov 19 from Santa Rosa to San Diego, returning Fri, Nov 27, priced at $161 just found
Southwest Airlines
Wed, Nov 18 - Sun, Nov 22
STS
Santa Rosa
SAN
San Diego
$162 Roundtrip, found 2 days ago
$162
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Wed, Nov 18 from Santa Rosa to San Diego, returning Sun, Nov 22, priced at $162 found 2 days ago
Southwest Airlines
Sun, Oct 4 - Tue, Oct 6
STS
Santa Rosa
SAN
San Diego
$167 Roundtrip, found 8 hours ago
$167
Roundtrip
found 8 hours ago
Select Southwest Airlines flight, departing Sun, Oct 4 from Santa Rosa to San Diego, returning Tue, Oct 6, priced at $167 found 8 hours ago
Delta
Thu, Oct 29 - Sun, Nov 1
STS
Santa Rosa
SAN
San Diego
$177 Roundtrip, just found
$177
Roundtrip
just found
Select Delta flight, departing Thu, Oct 29 from Santa Rosa to San Diego, returning Sun, Nov 1, priced at $177 just found

Alternative airports near San Diego

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

Select flight to McClellan-Palomar CLD. Cheapest option available. Average driving time to city center is 38 minutes. Flights from $722
CLD
McClellan-Palomar
Cheapest
Average driving time to city center38 min
Flights from $722

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

September is typically the cheapest month to fly

From $97 - $172 per traveler.

What you need to know for your flight from Sonoma County to San Diego Intl.

Santa Rosa (STS) to San Diego (SAN) at a glance

Travel from Santa Rosa (STS) to San Diego (SAN) with a range of airlines offering convenient routes on this domestic short-haul journey. Explore options for cheap flights from Santa Rosa, whether you prefer full-service or low-cost carriers, to find the itinerary that aligns with your budget and travel plans. Discover key details for san diego flights as you prepare to experience the vibrant sights and neighborhoods of San Diego.

  • Fastest flight duration: around 1h 45m non-stop
  • Route distance: roughly 500 miles (800 km)
  • Flights per week: around 14 flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $65–$320, depending on seasonality and how far ahead you book

Flights from Sonoma County Airport (STS) to San Diego International Airport (SAN)

Based on the latest traveler bookings, here are the top airlines favored for flights from Santa Rosa to San Diego, particularly for non-stop and one-stop options. Many travelers choose routes with convenient layovers at Sky Harbor International Airport (PHX, approximately 2h 15m) and Harry Reid International Airport (LAS, about 2h 30m). This variety allows you to balance price, total travel time, and cabin class to create the ideal itinerary.

  • Alaska Airlines: This full-service airline provides both non-stop and one-stop flights, with one-way ticket prices generally between $65 and $310. It represents around 82% of departures on this route, typically taking 1 hour and 45 minutes for direct flights.
  • American Airlines: As a full-service option, American Airlines offers non-stop and one-stop services, with one-way fares usually ranging from $110 to $400. It accounts for about 13% of flights on this route, with a standard flying time of 1 hour and 45 minutes.
  • Southwest Airlines: Known as a budget carrier, Southwest provides non-stop flights with one-way fares typically priced from $65 to $270. This airline handles roughly 3% of departures on this route, taking a total of 1 hour and 45 minutes for the journey.
  • Hawaiian Airlines: A full-service airline, Hawaiian Airlines features non-stop service with one-way fares generally between $100 and $260. It represents approximately 2% of flights on this route, with a complete travel time of 1 hour and 45 minutes.

Travelers flying from Santa Rosa to San Diego have the option to enhance their experience with an upgrade. Alaska Airlines provides both first class and business class services, while American Airlines offers first class seating.

Best time to fly from Santa Rosa (STS) to San Diego (SAN)

The most popular months for travelers flying from Santa Rosa to San Diego are January, March, and April, when peak temperatures in San Diego reach up to 60.6°F in April. If you prefer quieter travel, consider September, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 72°F. For better deals, April usually offers the lowest average one-way fare around $160. Flight availability peaks in April, with approximately 19 flights per week, making it easier to find convenient departure times. February and June have the fewest flights, with approximately 11 flights per week.

  • Cheapest time to fly: April usually offers good deals with average one-way fare around $160, roughly 9% cheaper than the yearly average.
  • More budget-friendly months to fly: March, October, and August typically offer average one-way fares of around $168.
  • Most flight options: April has the highest number of flights from Santa Rosa to San Diego, with approximately 19 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January57.4°F (14.1°C)High12$170
February56.8°F (13.8°C)Average11$186
March58.1°F (14.5°C)High14$167
April60.6°F (15.9°C)High19$160
May62.6°F (17.0°C)Average13$199
June66.4°F (19.1°C)Low11$206
July70.5°F (21.4°C)Low12$183
August72.3°F (22.4°C)Average13$169
September72.0°F (22.2°C)Low14$170
October68.2°F (20.1°C)Average15$168
November62.6°F (17.0°C)Average16$172
December57.4°F (14.1°C)Average15$174

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Santa Rosa (STS) to San Diego (SAN)

  • Santa Rosa to San Diego (STS-SDM): Brown Field Municipal Airport (SDM) is located approximately 17 miles from San Diego International Airport (SAN).
  • Santa Rosa to Carlsbad (STS-CLD): McClellan-Palomar Airport (CLD) lies about 28 miles from San Diego International Airport (SAN).
  • Napa to San Diego (APC-SAN): Napa Valley Airport (APC) is roughly 35 miles from Sonoma County Airport (STS).

How to find the best prices for flights from Santa Rosa (STS) to San Diego (SAN)

Getting some of the best deals on flights from Santa Rosa to San Diego is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually available when booking 2-8 weeks in advance, which aligns with when most travelers make their reservations. Evening departures from 6 PM to 12 AM often offer lower prices, while morning flights from 5 AM to 12 PM are the most popular. Additionally, flying on Wednesday typically provides cheaper rates, although Friday remains the busiest travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find San Diego hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at San Diego International Airport from Sonoma County Airport

San Diego welcomes travelers from Santa Rosa with a range of transport options based on price, convenience, and proximity. For departures, Sonoma County Airport is roughly a 10-minute drive (covering about 9 miles) from central Santa Rosa. Here's how to reach San Diego efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in San Diego, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from San Diego International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at San Diego International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From San Diego International Airport, Seaport (a seaport) is conveniently located just 0.1 miles away on foot, while Middletown Station (a metro station) is approximately 2.3 miles from the airport and can be reached by car. Additionally, B Street Cruise Ship Terminal (a cruise terminal) is about 3 miles away by car, providing easy access for travelers.

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 $69 and cheap return flights from $148 Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) with Expedia. One-way flights generally range between $93 and $719, and roundtrip flights usually range from $210 to $918. 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 Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
January is the cheapest month to fly from Santa Rosa, CA (STS) to San Diego, CA (SAN), with average round-trip fares around $219. This is about 16% lower than the average price throughout the year, as January typically sees a drop in travel demand after the holiday season. Other cheap months to fly from STS to SAN include February and September.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
Hawaiian Airlines operates around 11 direct flights from STS to SAN every week.
What is the cheapest airline that flies from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
Southwest Airlines is one of the cheapest airlines offering nonstop flights from Santa Rosa (STS) to San Diego (SAN), with tickets starting from around $157. 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.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
To find a cheap flight from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.), 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 airline to fly with from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
The best airline to fly with from Santa Rosa, CA (STS) to San Diego, CA (SAN) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. Alaska Airlines offers the most daily flights from Santa Rosa to San Diego, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
The best time to fly from Santa Rosa, CA (STS) to San Diego, CA (SAN) is in January or February, with average return flight prices around $219. These months are typically quieter, making them perfect for travelers looking for both good deals and a more relaxed atmosphere.*Prices based on flights available on Expedia in the last year.
How many flights per day from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
You can find approximately 1 nonstop flights per day from Sonoma County (STS) to San Diego Intl. (SAN). For more options, look at flights that include layovers.
What is the earliest flight from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
The earliest flight from Sonoma County Airport (STS) to San Diego International Airport (SAN) typically departs at around 6:00 AM, operated by American Airlines. This seasonal service runs from February to October, and an early departure can help you enjoy a full day in San Diego. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
The most popular departure times for flights from Sonoma County Airport (STS) to San Diego International Airport (SAN) are from 6am to 9am. About 29% of passengers prefer this time window. Many major carriers, including Alaska Airlines and Southwest Airlines, offer flights during this window. This timing is favored because it allows you to enjoy a full day in San Diego after your arrival.
How long does it take to fly from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
Direct flights from STS to SAN usually take about 1 hour 50 minutes, traveling roughly 508 miles. If you opt for a connecting flight, expect to add around 3 hours 30 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
First class seats are offered on the STS to SAN route with American Airlines.
How much is a business class flight from Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
A direct, return business class ticket from Santa Rosa, CA (STS) to San Diego, CA (SAN) typically costs between $587 - $1,034. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
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 from Sonoma County (STS)?
From Sonoma County (STS), you can fly into San Diego Intl. (SAN) to reach San Diego. Some flights may connect through major hubs like Los Angeles Intl. (LAX), Bob Hope (BUR), Harry Reid Intl. (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.) San Diego Vacation Packages 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-Sonoma County) to San Diego, CA (SAN-San Diego Intl.)?
If you booked your Santa Rosa, CA (STS-Sonoma County) to San Diego, CA (SAN-San Diego Intl.) 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, American Airlines, Delta, Southwest Airlines
Roundtrip price
$111
Distance
508 mi
Average flight time
1 hour 44 mins

Book with confidence

Santa Rosa to San Diego Flights

The cheapest times to fly from Santa Rosa to San Diego

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 Santa Rosa to San Diego are during the month of January. You can find some of the cheapest flights from Santa Rosa to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Santa Rosa to San Diego

Sunday is one of the best days to book for cheap flights from Santa Rosa to San Diego: 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 Santa Rosa to San Diego

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 Santa Rosa to San Diego in 2026. You can also book with separate airlines for your outbound and return journeys, from $69 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 Santa Rosa to San Diego 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 Santa Rosa to San Diego 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.

 

Santa Rosa to San Diego Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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