A vineyard with rows of grapevines, a dirt path, and a backdrop of rolling hills and trees.

$175 Cheap Flights from St. Louis (STL) to Santa Rosa (STS)

View $175 flight on Wed, Oct 28, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Santa Rosa, CA (STS-Sonoma County)

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Cheap Flights from St. Louis to Santa Rosa (STL-STS)

Prices were available within the past 7 days and start at $175 for one-way flights and $418 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Dec 9 - Fri, Dec 11
STL
St. Louis
STS
Santa Rosa
$418 Roundtrip, found 3 days ago
$418
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Dec 9 from St. Louis to Santa Rosa, returning Fri, Dec 11, priced at $418 found 3 days ago
Southwest Airlines
Sat, Nov 7 - Fri, Nov 13
STL
St. Louis
STS
Santa Rosa
$419 Roundtrip, found 1 day ago
$419
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sat, Nov 7 from St. Louis to Santa Rosa, returning Fri, Nov 13, priced at $419 found 1 day ago
Southwest Airlines
Sat, Nov 7 - Tue, Nov 10
STL
St. Louis
STS
Santa Rosa
$424 Roundtrip, found 1 day ago
$424
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sat, Nov 7 from St. Louis to Santa Rosa, returning Tue, Nov 10, priced at $424 found 1 day ago
Southwest Airlines
Sat, Nov 7 - Fri, Nov 13
STL
St. Louis
STS
Santa Rosa
$430 Roundtrip, found 1 day ago
$430
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sat, Nov 7 from St. Louis to Santa Rosa, returning Fri, Nov 13, priced at $430 found 1 day ago
Southwest Airlines
Sat, Nov 7 - Tue, Nov 10
STL
St. Louis
STS
Santa Rosa
$430 Roundtrip, found 1 day ago
$430
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sat, Nov 7 from St. Louis to Santa Rosa, returning Tue, Nov 10, priced at $430 found 1 day ago
Southwest Airlines
Wed, Dec 9 - Fri, Dec 11
STL
St. Louis
STS
Santa Rosa
$435 Roundtrip, found 3 days ago
$435
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Wed, Dec 9 from St. Louis to Santa Rosa, returning Fri, Dec 11, priced at $435 found 3 days ago
Southwest Airlines
Fri, Oct 9 - Mon, Oct 12
STL
St. Louis
STS
Santa Rosa
$451 Roundtrip, found 3 days ago
$451
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Fri, Oct 9 from St. Louis to Santa Rosa, returning Mon, Oct 12, priced at $451 found 3 days ago
American Airlines
Mon, Oct 19 - Mon, Oct 26
STL
St. Louis
STS
Santa Rosa
$452 Roundtrip, found 17 hours ago
$452
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Mon, Oct 19 from St. Louis to Santa Rosa, returning Mon, Oct 26, priced at $452 found 17 hours ago
Alaska Airlines
Sat, Oct 17 - Sat, Oct 24
STL
St. Louis
STS
Santa Rosa
$483 Roundtrip, found 1 day ago
$483
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 17 from St. Louis to Santa Rosa, returning Sat, Oct 24, priced at $483 found 1 day ago
Delta
Fri, Nov 6 - Mon, Nov 9
STL
St. Louis
STS
Santa Rosa
$554 Roundtrip, found 1 day ago
$554
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Nov 6 from St. Louis to Santa Rosa, returning Mon, Nov 9, priced at $554 found 1 day ago

Alternative airports near Santa Rosa

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

Select flight to Sonoma County STS. Cheapest and Closest option available. Average driving time to city center is 10 minutes. Flights from $619
STS
Sonoma County
CheapestClosest
Average driving time to city center10 min
Flights from $619

What you need to know for your flight from Lambert-St. Louis Intl. to Sonoma County

St. Louis (STL) to Santa Rosa (STS) at a glance

Explore a range of airlines providing service from St. Louis (STL) to Santa Rosa (STS) on this domestic short-haul journey. You can evaluate options from various full-service carriers to identify the itinerary that aligns best with your budget, schedule, and travel plans as you discover the renowned attractions and neighborhoods of Santa Rosa. Here are the essential details for flights departing from Lambert-St. Louis International Airport (STL) to Sonoma County Airport (STS).

  • Fastest flight duration: around 6 hours in-flight, plus roughly 1 hour layover with one stop
  • Route distance: roughly 1,700 miles (2,740 km)
  • Flights per week: around 7 departures on average
  • Typical fares (one-way): economy tickets often range from $160–$535, depending on seasonality and how far ahead you book

Flights from Lambert-St. Louis International Airport (STL) to Sonoma County Airport (STS)

Based on the latest traveler bookings, here are the top airlines flying from St. Louis to Santa Rosa, often favored for their one-stop services. Common layover points include Sky Harbor International Airport in Phoenix (PHX) with about a 1-hour stop, Seattle-Tacoma International Airport (SEA) offering a layover of approximately 1 hour and 45 minutes, and Dallas-Fort Worth International Airport (DFW) with a 45-minute connection. These options allow you to balance price, total travel time, and cabin class to create the ideal travel itinerary.

  • American Airlines: This major airline provides a full-service experience with one-stop flights, typically priced between $215 and $525 for one-way fares. It handles around 62% of departures on this route, featuring an in-flight duration of 6 hours and a total travel time of about 7 hours and 15 minutes, including layover.
  • Alaska Airlines: Another full-service option, Alaska Airlines offers one-stop flights with one-way fares generally ranging from $160 to $640. It represents approximately 35% of departures for this route, with a flight time of 6 hours and an overall journey lasting around 7 hours and 15 minutes, factoring in the layover.

Alternative routes from St. Louis (STL) to Santa Rosa (STS)

  • St. Louis to Santa Rosa (SUS-STS): Located approximately 16 miles from Lambert-St. Louis International Airport (STL), Spirit of St. Louis Airport (SUS) serves as a convenient option for this route.
  • St. Louis to Novato (STL-NOT): Gnoss Field Airport (NOT) is about 29 miles distant from Sonoma County Airport (STS), making it a viable choice for travelers heading to Novato.
  • Springfield to Santa Rosa (SPI-STS): Abraham Lincoln Capital Airport (SPI) lies roughly 85 miles from Lambert-St. Louis International Airport (STL), providing an alternative route for those flying to Santa Rosa.

How to find the best prices for flights from St. Louis (STL) to Santa Rosa (STS)

Getting some of the best deals on flights from St. Louis to Santa Rosa 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 found when booking 2-8 weeks in advance, which coincides with when most travelers make their reservations. Morning departures between 5 a.m. and 12 p.m. tend to be cheaper and are also the most popular flight times. Additionally, flying on Wednesday generally offers lower prices, although Thursday is the most favored 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 Santa Rosa 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 Sonoma County Airport from Lambert-St. Louis International Airport

Santa Rosa welcomes travelers from St. Louis with a range of transport options based on price, convenience, and proximity. Santa Rosa city center is approximately a 10-minute drive (covering about 9 miles) from Sonoma County Airport, depending on traffic. Here's how to reach Santa Rosa efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Santa Rosa, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from Sonoma County Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Sonoma County 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 Sonoma County Airport, Santa Rosa Station, a train station, is located about 7.6 miles away by car.

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) cost?
You can find cheap one-way flights from $175 and cheap return flights from $418 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) with Expedia. One-way flights typically cost between $239 and $1108, and return flights often range between $403 and $1414. 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The cheapest month to fly from STL to STS is December 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're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
Enter STL to STS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
Southwest Airlines is one of the cheapest airlines offering connecting flights from St. Louis, MO (STL) to Santa Rosa, CA (STS), with round-trip tickets starting from around $287 with a layover in San Diego Intl. (SAN). 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County), 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The earliest flight from St. Louis (STL-Lambert-St. Louis Intl.) to Santa Rosa (STS-Sonoma County) typically leaves at 5:00 AM, operated by American Airlines. This seasonal service is available in May, allowing you to maximize your time in California's wine country. 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The most popular departure times for flights from St. Louis (STL) to Santa Rosa (STS) are from 6am to 9am. This time window accounts for around 62% of total traffic, with American Airlines and Alaska Airlines operating flights during this period. Many travelers prefer this timing as it allows for a full day of exploration upon arrival.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
A flight from STL to STS with a layover takes around 6 hours 30 minutes, with the route covering approximately 1,742 miles. 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
Select the "Business class" and "First class" filters when looking for STL to STS 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) 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 Santa Rosa from Lambert-St. Louis Intl. (STL)?
If you're planning to travel to Santa Rosa from Lambert-St. Louis Intl. (STL), you can fly into Sonoma County (STS) Some flights may connect through major hubs like Denver Intl. (DEN), O'Hare Intl. (ORD), Seattle - Tacoma Intl. (SEA) before reaching Santa Rosa. 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Santa Rosa, CA (STS-Sonoma County) 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
Lambert-St. Louis Intl.
Destination airport
Sonoma County
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines
Roundtrip price
$418
Distance
1741 mi

Book with confidence

St. Louis to Santa Rosa Flights

The cheapest times to fly from St. Louis to Santa Rosa

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

 

The best time to book a flight from St. Louis to Santa Rosa

Sunday is one of the best days to book for cheap flights from St. Louis to Santa Rosa: 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 St. Louis to Santa Rosa

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 St. Louis to Santa Rosa in 2026. You can also book with separate airlines for your outbound and return journeys, from $175 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 St. Louis to Santa Rosa 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 St. Louis to Santa Rosa 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.

 

St. Louis to Santa Rosa Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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