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Santa Rosa

$372+ Cheap flights from St. Louis to Santa Rosa (STL - STS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — STS
Jan 29 — Feb 51
Thu 1/29
Thu 2/5
1 adult, Economy
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Cheap flight deals from St. Louis to Santa Rosa

Cheapest flights from St. Louis to Santa Rosa
Explore the most affordable flight options available from St. Louis to Santa Rosa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 30, 2025.

This American Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:16 amSTL - STS
2 stops9h 13mAmerican Airlines
Fri 1/212:59 pmSTS - STL
1 stop8h 52mAmerican Airlines
Deal found 12/27$994
This Alaska Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:26 pmSTL - STS
1 stop22h 06mAlaska Airlines
Fri 1/22:24 pmSTS - STL
1 stop7h 35mAlaska Airlines
Deal found 12/27$1,024

Find flight deals from St. Louis to Santa Rosa

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Santa Rosa (STS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$372
(Alaska Airlines)

Popular in

April

Cheapest in

February

Average price

$403
Provider with most accurate pricing for Lambert-St Louis-Santa Rosa Sonoma County flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Santa Rosa Sonoma County flights.
Search Deals
From Lambert-St Louis to Santa Rosa Sonoma County
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Santa Rosa that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 30, 2025.
Use the filters below to find and compare flights from St. Louis to Santa Rosa that are best for you.

Fly from

St. Louis

Fly to

Santa Rosa

Route

Depart

Return

Price

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Tue 2/24

7:00 am-9:52 pm

1 stop16h 52m

Santa Rosa Sonoma County

Sat 2/28

7:57 pm-11:59 pm

1 stop26h 02m

$372

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Mon 1/26

2:50 pm-11:59 pm

1 stop11h 09m

Santa Rosa Sonoma County

Mon 2/2

9:33 pm-1:54 pm

1 stop14h 21m

$372

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Wed 2/18

7:00 am-9:52 pm

1 stop16h 52m

Santa Rosa Sonoma County

Tue 2/24

7:57 pm-1:51 pm

1 stop15h 54m

$372

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Mon 1/26

2:50 pm-12:22 pm

2 stops23h 32m

Santa Rosa Sonoma County

Sat 1/31

11:15 am-1:54 pm

1 stop24h 39m

$384

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Compare providers for flights from St. Louis to Santa Rosa

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Santa Rosa in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Santa Rosa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Santa Rosa flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Santa Rosa flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Santa Rosa flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Santa Rosa flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Santa Rosa

Have a flexible travel schedule? Discover the best time to fly to Santa Rosa from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Santa Rosa

What is the cheapest month to book a flight from St. Louis to Santa Rosa?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Santa Rosa (average of $124). Flying from St. Louis to Santa Rosa in May is currently the most expensive (average of $246). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Santa Rosa

Get insights into the airlines that provide service to Santa Rosa. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Santa Rosa. Reviews last updated December 30, 2025.
Get a feel of what it's like to fly with American Airlines from St. Louis to Santa Rosa by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,073 reviews

Crew

8.0

Entertainment

6.9

Overall

7.2

Boarding

7.5

Comfort

7.2

Food

6.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.
American Airlines
7.2
Good
11,073 reviews
American Airlines
7.2
Good
11,073 reviews

Crew

8.0

Entertainment

6.9

Overall

7.2

Boarding

7.5

Comfort

7.2

Food

6.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Santa Rosa. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Santa Rosa?

    Departing from St. Louis to Santa Rosa will take you 16h 52m. Airlines will cover a distance of 1741 mi.

  • What is the cheapest airline to fly from St. Louis to Santa Rosa round-trip?

    American Airlines, at $494, was found to be the cheapest airline from St. Louis to Santa Rosa.. American Airlines is currently priced 21% below the average price you’ll pay for this route.

  • Can I find deals for flights from St. Louis to Santa Rosa that include hotel bookings?

    Yes. In addition to deals on St. Louis to Santa Rosa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Santa Rosa?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Santa Rosa.

  • Can I find deals for business class flights from St. Louis to Santa Rosa?

    Yes. Cheapflights offers flight deals from St. Louis to Santa Rosa by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Santa Rosa?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Santa Rosa (average of $124). Flying from St. Louis to Santa Rosa in May is currently the most expensive (average of $246). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Santa Rosa?

Book flights to Santa Rosa if you plan to visit one of these locations
Fort Bragg
Ukiah

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Alternative routes for St. Louis to Santa Rosa

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Top airline flying from St. Louis to Santa Rosa

Discover the top airline that operate flights from St. Louis to Santa Rosa. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$494Average$644FlexibilityNo cancel feeOn-time71%

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