Title: Cheap Flights from St. Louis (STL) to Santa Rosa (STS) - Expedia.ca

 

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

-   [Roundtrip](?flightType=roundtrip)
-   [One-way](?flightType=oneway)
-   [Multi-city](?flightType=multicity)

### Travellers

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

-   ![Alaska Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg)
    
    Alaska Airlines
    
    [](https://www.expedia.ca/Flights-Search?leg1=from:stl,to:sts,departure:19/11/2025TANYT&leg2=from:sts,to:stl,departure:26/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}])
-   ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg)
    
    American Airlines
    
    [](https://www.expedia.ca/Flights-Search?leg1=from:stl,to:sts,departure:19/11/2025TANYT&leg2=from:sts,to:stl,departure:26/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}])
-   ![Hawaiian Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_HA.svg)
    
    Hawaiian Airlines
    
    [](https://www.expedia.ca/Flights-Search?leg1=from:stl,to:sts,departure:19/11/2025TANYT&leg2=from:sts,to:stl,departure:26/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"HA"}}])
-   ![Southwest Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg)
    
    Southwest Airlines
    
    [](https://www.expedia.ca/Flights-Search?leg1=from:stl,to:sts,departure:19/11/2025TANYT&leg2=from:sts,to:stl,departure:26/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}])

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## Frequently asked questions

### How much is a flight from STL to Sonoma County Airport?

> Round-trip journeys from Lambert Field to Sonoma County Airport (STS) start from . This is based on fares advertised within the last 7 days on Expedia for flights departing within the next year — book now to avoid missing out. Prices and availability are subject to change. Additional terms apply.

### Do I need to pay a cancellation fee if I cancel my flight from STL to STS?

> This can differ between airlines, as each has its own terms and conditions. Visit the [Customer Service Portal](https://www.expedia.ca/helpcenter), where you'll find simple instructions on how to cancel your flight online.

### How do I find cheap flights from Lambert Field to Sonoma County Airport that have flexible change policies?

> Select our "No change fees" filter to find flexible ticketing options for your flight from Lambert Field to STS. This allows you to secure a good price ahead of time and still have the freedom to reschedule without any additional fees. Fare adjustments may apply if your new flight is more expensive.

### How many hours is the flight from Lambert-St. Louis Intl. Airport (STL) to STS?

> It takes around 6 hours and 23 minutes to journey from Lambert-St. Louis Intl. Airport (STL) to Sonoma County Airport (STS). But with a solid playlist and an interesting book, the time will go by quicker.

### How far is the flight from STL to Sonoma County Airport?

> You'll be cruising at altitude for a while, as the flight distance from Lambert-St. Louis Intl. Airport (STL) to Sonoma County Airport is 2,800 kilometres. Put together a playlist of your favourite podcasts before you leave home to keep yourself entertained during your journey.

### Which airlines fly direct from STL to Sonoma County Airport (STS)?

> Unfortunately, there are no airlines that fly direct between STL and Sonoma County Airport (STS). You'll have to book a flight with at least one stop.

### Are Lambert-St. Louis Intl. Airport (STL) to Sonoma County Airport (STS) flight tickets cheaper when they're purchased at the last minute?

> Last-minute planners can sometimes nab a bargain, with some super cheap fares from Lambert-St. Louis Intl. Airport (STL) to Sonoma County Airport (STS) surfacing a few weeks prior to the departure date. If you'd rather book ahead, Expedia compares and updates all the best flight deals continuously — as early as a year in advance in some cases. It depends on the carrier though, as not every airline releases prices so far in advance.

## Travel information

| Origin airport | Lambert-St. Louis Intl. |
| --- | --- |
| Destination airport | Sonoma County |
| Distance | 2786 km |

## Book with confidence

### St. Louis to Windsor Flights

**The easy way to book your flights from St. Louis to Santa Rosa** 

With Expedia, it’s simple to find and book flights to Santa Rosa from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are nonstop flights to Sonoma County, too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Santa Rosa today, tomorrow, or this week.  

**Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Sonoma County, STS** 

Sort your search results by price to find great deals on your flight from St. Louis to Santa Rosa—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Santa Rosa from St. Louis currently is just rising to .  

Here are more money-saving tips: 

-   Fly in when flight prices are normally at their lowest 
-   Book about a month to 6 weeks before you travel for the best prices to Santa Rosa  
-   Avoid peak season and weekends when flights can cost more
-   Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
-   One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

**Reasons to choose Expedia for your flight to Santa Rosa from St. Louis** 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Santa Rosa with Expedia today.

## Explore a world of travel with Expedia

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