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£112 Cheap Flights from Denver (DEN) to Santa Rosa (STS)

View £112 flight on Wed, 19 Aug 2026Opens in a new window

Popular airlines from Denver International Airport (DEN) to Santa Rosa, CA (STS-Sonoma County)

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Cheap Flights from Denver (DEN) to Santa Rosa (STS)

Prices were available within the past 7 days and start at £112 for one-way flights and £226 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, 20 Aug - Mon, 24 Aug
DEN
Denver
STS
Santa Rosa
£226 Return, found 6 days ago
£226
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 20 Aug from Denver to Santa Rosa, returning Mon, 24 Aug, priced at £226 found 6 days ago
Alaska Airlines
Sat, 17 Oct - Tue, 20 Oct
DEN
Denver
STS
Santa Rosa
£243 Return, found 2 days ago
£243
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 17 Oct from Denver to Santa Rosa, returning Tue, 20 Oct, priced at £243 found 2 days ago
Alaska Airlines
Thu, 20 Aug - Mon, 24 Aug
DEN
Denver
STS
Santa Rosa
£255 Return, found 6 days ago
£255
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 20 Aug from Denver to Santa Rosa, returning Mon, 24 Aug, priced at £255 found 6 days ago
Alaska Airlines
Sat, 17 Oct - Tue, 20 Oct
DEN
Denver
STS
Santa Rosa
£263 Return, found 2 days ago
£263
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 17 Oct from Denver to Santa Rosa, returning Tue, 20 Oct, priced at £263 found 2 days ago
Alaska Airlines
Thu, 20 Aug - Mon, 24 Aug
DEN
Denver
STS
Santa Rosa
£276 Return, found 6 days ago
£276
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 20 Aug from Denver to Santa Rosa, returning Mon, 24 Aug, priced at £276 found 6 days ago
Alaska Airlines
Sat, 17 Oct - Tue, 20 Oct
DEN
Denver
STS
Santa Rosa
£286 Return, found 2 days ago
£286
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 17 Oct from Denver to Santa Rosa, returning Tue, 20 Oct, priced at £286 found 2 days ago
Alaska Airlines
Sat, 17 Oct - Tue, 20 Oct
DEN
Denver
STS
Santa Rosa
£295 Return, found 2 days ago
£295
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 17 Oct from Denver to Santa Rosa, returning Tue, 20 Oct, priced at £295 found 2 days ago
Alaska Airlines
Sat, 17 Oct - Tue, 20 Oct
DEN
Denver
STS
Santa Rosa
£306 Return, found 2 days ago
£306
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 17 Oct from Denver to Santa Rosa, returning Tue, 20 Oct, priced at £306 found 2 days ago
Alaska Airlines
Thu, 20 Aug - Mon, 24 Aug
DEN
Denver
STS
Santa Rosa
£313 Return, found 6 days ago
£313
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 20 Aug from Denver to Santa Rosa, returning Mon, 24 Aug, priced at £313 found 6 days ago
Alaska Airlines
Sat, 17 Oct - Tue, 20 Oct
DEN
Denver
STS
Santa Rosa
£314 Return, found 2 days ago
£314
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 17 Oct from Denver to Santa Rosa, returning Tue, 20 Oct, priced at £314 found 2 days ago

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County) cost?
You can find one-way and return flights from DEN to STS with Expedia. 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 our cheapest fares first, and use the Price Tracking tool to receive alerts when DEN to STS ticket fares go up or down.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The cheapest months to fly from DEN to STS are typically during off-peak season 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 are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
Only one airline offers direct flights from Denver Intl. (DEN) to Sonoma County (STS). Southwest Airlines operates 7 direct flights from Denver Intl. (DEN) to Sonoma County (STS) every week.
What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
Southwest Airlines also offers one of the cheapest connecting return flights on this route, with a layover in Sky Harbor Intl. (PHX), starting from around £190. Southwest Airlines is one of the cheapest airlines offering nonstop return flights from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County), with tickets starting from around £256 for flights that can be booked for departure within the next year. These prices are per adult, for economy/coach class. 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.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
To find a cheap flight from Denver, CO (DEN-Denver 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 airline to fly with from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The best airline to fly with from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. Alaska Airlines offers the most daily flights from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County), 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 Denver, CO (DEN-Denver 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.
How many flights per day from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
There are approximately 25 connecting flights per day from Denver International (DEN) to Sonoma County (STS). Some common connection points include Seattle - Tacoma International (SEA), Portland International (PDX), and San Diego International (SAN).
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The earliest flight from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County) typically departs around 5:00 AM. This service is operated by American Airlines. This is a seasonal service, active in May, June, and July. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
You'll find the most flights from Denver International Airport (DEN) to Sonoma County (STS) on a Wednesday, with around 27 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Alaska Airlines, Southwest Airlines, and American Airlines. Looking at the week, Wednesday has notably more flight options compared to other days, which typically see around 17 to 24 flights.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The most popular departure times for flights from Denver Intl. (DEN) to Sonoma County (STS) are in the early morning, from 6am to 9am. Many major carriers, including Southwest Airlines, Alaska Airlines and American Airlines, offer flights during this window. Many travellers prefer these times as it allows for an early start to their journey and an arrival at their destination with plenty of time left in the day.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
A non-stop flight from Denver International Airport (DEN) to Sonoma County (STS) typically takes around 2 hours 48 minutes. This route covers a distance of approximately 1,567 kilometers. If you opt for a flight with one stop, your journey will usually take longer, around 5 hours 30 minutes. Flights with two or more stops generally take about 14 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
You can fly first class between DEN and STS. First class cabins are available on Alaska Airlines and American Airlines.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver 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, CA (STS) from Denver, CO (DEN)?
If you're planning to travel to Santa Rosa from Denver Intl. (DEN), you can fly directly into Sonoma County Airport (STS) which offers domestic flights and connections. Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Sky Harbor Intl. (PHX), or Portland Intl. (PDX) 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 Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver 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 Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County) flight and hotel package?
Securing a Denver, CO (DEN-Denver 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 Denver, CO (DEN-Denver Intl.) to Santa Rosa, CA (STS-Sonoma County)?
If you booked your Denver, CO (DEN-Denver 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
Denver Intl.
Destination airport
Sonoma County
Return price
£225
Distance
1558 km
Average flight time
2 hours 40 mins

Book with confidence

Compare flights from Denver to Santa Rosa easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Denver to Santa Rosa. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Sonoma County in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Denver Intl. to Sonoma County.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Denver Intl. (DEN) to Sonoma County (STS)

The easiest way to view the best deals on flights from Denver to Santa Rosa today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Denver Intl. to Sonoma County start at just £226 and range up to £314.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Denver and Santa Rosa
  • booking your flight during August, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Denver to Santa Rosa flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Denver Intl. to Sonoma County for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Denver to Santa Rosa easily and book with confidence

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*Available to Expedia members.