HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Santa Rosa

$159+ Cheap flights from St. Louis to Santa Rosa (STL - STS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — STS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Santa Rosa with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 June 12, 2025.

Round-trip from

$485
(Alaska Airlines)

One-way from

$159
(Alaska Airlines)

Popular in

April

Cheapest in

December

Average price

$603
From Lambert-St Louis to Santa Rosa Sonoma County
Search Deals
One-way flight from Lambert-St Louis to Santa Rosa Sonoma County
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find 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 June 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/12. 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.
Fri 8/17:32 pmSTL - STS
1 stop25h 35mAlaska Airlines
Mon 8/48:01 pmSTS - STL
1 stop25h 58mAlaska Airlines
Deal found 6/12$485
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/167:03 amSTL - STS
1 stop6h 37mAmerican Airlines
Sun 7/204:16 pmSTS - STL
1 stop6h 12mAmerican Airlines
Deal found 6/12$609

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 June 12, 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

Fri 8/1

7:32 pm-7:07 pm

1 stop25h 35m

Santa Rosa Sonoma County

Mon 8/4

8:01 pm-11:59 pm

1 stop25h 58m

$485

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Wed 7/16

7:03 am-11:40 am

1 stop6h 37m

Santa Rosa Sonoma County

Sun 7/20

4:16 pm-12:28 am

1 stop6h 12m

$609

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Tue 10/21

6:33 am-1:34 pm

1 stop9h 01m

$159

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Wed 6/25

6:41 am-1:25 pm

1 stop8h 44m

$379

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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, February is the cheapest month in which you can book a flight from St. Louis to Santa Rosa (average of $202). Flying from St. Louis to Santa Rosa in June is currently the most expensive (average of $395). 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.

Rainfall in Santa Rosa by month

Plan your trip to Santa Rosa by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Santa Rosa ranges from 0.0 - 7.1 inches per month. January is typically the wettest month, when rainfall can reach 7.1 in. July is typically the driest time to visit Santa Rosa when rainfall is around 0.0 in.

Temperature in Santa Rosa by month

Plan your trip to Santa Rosa by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Santa Rosa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 46.4 F).

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 June 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines flying from St. Louis to Santa Rosa round-trip?

    Alaska Airlines, at $485, was found to be the cheapest airline from St. Louis to Santa Rosa. An alternate airline flying to your destination would be American Airlines. Alaska Airlines is currently priced 19% 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, February is the cheapest month in which you can book a flight from St. Louis to Santa Rosa (average of $202). Flying from St. Louis to Santa Rosa in June is currently the most expensive (average of $395). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Fort Bragg
Ukiah

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Santa Rosa

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Las Vegas flights
Kansas City to Las Vegas flights
St. Louis to Los Angeles flights
Kansas City to Los Angeles flights
Kansas City to San Francisco flights
St. Louis to San Francisco flights
Springfield to Reno flights
Kansas City to San Diego flights
St. Louis to San Diego flights
St. Louis to Ontario flights
Kansas City to Ontario flights
St. Louis to Sacramento flights
Kansas City to Oakland flights
Kansas City to Sacramento flights
Kansas City to San Jose flights
St. Louis to Burbank flights
St. Louis to Santa Ana flights
St. Louis to Long Beach flights
Kansas City to Santa Ana flights
Springfield to Las Vegas flights
St. Louis to Palm Springs flights
St. Louis to San Jose flights
St. Louis to Reno flights
Kansas City to Reno flights
Kansas City to Burbank flights
St. Louis to Oakland flights
Springfield to Ontario flights
St. Louis to Redding flights
Springfield to San Diego flights
Springfield to Santa Ana flights
Kansas City to Fresno flights
St. Louis to Fresno flights
Springfield to Sacramento flights
Kansas City to San Luis Obispo flights
Kansas City to Palm Springs flights
St. Louis to Monterey flights
Joplin to Las Vegas flights
St. Louis to Santa Barbara flights
Springfield to Los Angeles flights
St. Louis to Medford flights
Springfield to San Francisco flights
Kansas City to Santa Barbara flights
Kansas City to Long Beach flights
Kansas City to Monterey flights
Kansas City to Medford flights
Springfield to Burbank flights
Columbia to San Francisco flights
Kansas City to Bakersfield flights
Columbia to Los Angeles flights
Columbia to Las Vegas flights

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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$346Average$638FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.