C$159 Cheap Flights from Denver (DENA) to Santa Rosa (STS)

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Flight deals from Denver to Santa Rosa Airport

Looking for a cheap last-minute deal or the best return flight from Denver to Santa Rosa Airport? If you want to travel next month, return fares start from C$461. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Denver to Santa Rosa

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver to Santa Rosa flights are currently cheapest in June.

Which airlines fly from Denver to Santa Rosa?

Denver to Santa Rosa: Alternative routes

Compare routes from Denver to Santa Rosa below. You may find an airport to fly into that's cheaper, faster, or easier than Santa Rosa.

Denver to Santa Rosa: Flight information

The things to know before you go.
Cheapest flight foundC$159
Cheapest month to flyJune
Average flight time2 hrs, 39 mins
Most popular airlineSouthwest Airlines
Average flights per week3

Finding cheap flights from Denver to Santa Rosa: Frequently asked questions

The best price we found for a return flight from Denver to Santa Rosa is C$410. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 39 minutes is the average flight time from Denver to Santa Rosa.
Southwest Airlines flies direct from Denver to Santa Rosa.
As of March 2026, there are 3 flights per week flying from Denver to Santa Rosa.
The cheapest month to fly from Denver to Santa Rosa is usually May.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Denver to Santa Rosa Airport on Friday, May 1, 2026.
Yes – the average flight time is 2 hours and 39 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Santa Rosa but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Santa Rosa is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Santa Rosa is Southwest Airlines .

Flying from Denver to Sonoma County Airport (STS): what you need to know

  • Denver's main airport is Denver International Airport (DEN). Check out your options for departing from this base when booking flights from Denver to Sonoma County Airport (STS).

  • The timezone in Santa Rosa is UTC-7, which is 1 hour behind Denver. Sonoma County Airport is located in Santa Rosa.

  • To ensure you get on your flight from Denver to STS, allow plenty of time to check in and find your gate. Arriving two hours before international departures and an hour before domestic flights is the general travel rule.

  • July is a peak travel month. If you're heading away then or during a major holiday like July Fourth, be there even earlier. Aim for at least two hours ahead for domestic flights and as much as four hours for international journeys.

Airports in Denver

Denver International Airport (DEN)

  • The distance from central Denver to DEN is about 40 kilometres. Use Google Maps for the quickest way to get there, whether that's in your own car or with public transport.

  • Get your flight from Denver to Sonoma County Airport off to an easy start. Only a quick drive from Denver International Airport, spend the night at SpringHill Suites Denver Airport and you'll be well-rested for the trip ahead.

About Sonoma County Airport (STS)

Getting from Sonoma County Airport (STS) to central Santa Rosa

  • Sonoma County Airport to central Santa Rosa takes around 14 minutes by car. It's approximately 13 kilometres away. Find out what options are available, such as cabs, car rentals or ride-sharing services.

  • It typically takes 36 minutes if you're travelling on public transport.

How to find the cheapest flights from Denver to Sonoma County Airport (STS)

  • The best price we've seen for a one-way ticket from Denver to Sonoma County Airport is C$159. The cheapest price for a return flight is C$410. Keep in mind fares can change due to availability at the time of booking.

  • To get your hands on flight tickets from Denver to STS, book early. Airlines typically offer their best fares when flights are first released.

  • Take advantage of the 'Whole month' search tool to compare the prices of tickets from Denver to Sonoma County Airport across each month. The lowest fares are highlighted in green, so you can easily find a flight that fits your budget.

  • Locking in a cheap ticket from Denver to STS is a piece of cake with Price Alerts. Simply create one of these automatic alerts and we'll let you know as soon as the price has fallen.

  • Make the most of the filters to find your ideal journey. To see the 'Fastest,' 'Cheapest' or 'Best' flights from Denver to Sonoma County Airport, use the 'Sort by' function. You can also filter results by airline, arrival and departure times, and number of stops.

The best time to fly from Denver to Sonoma County Airport (STS)

  • It's time to pick your travel dates for your flight from Denver to Sonoma County Airport. October is the most popular month to visit Santa Rosa. If you prefer a quieter atmosphere, go in May.

  • When booking your flight from Denver to STS, think about the kind of weather you enjoy. August is the warmest month in Santa Rosa, with temperatures ranging from 11ºC to 29ºC.

  • Travel in February if you want cooler conditions. Average temperatures range between 2ºC and 19ºC. However, this destination delivers on a good time whenever you book your cheap flights from Denver to Sonoma County Airport.

More about Santa Rosa

  • Start your Santa Rosa trip off on the right foot by choosing the perfect place to stay. As soon as you've booked your flight from Denver to Sonoma County Airport, browse our range of accommodation options including:

  • One of the best ways to get a feel for Santa Rosa is to check out its most popular sights. Highlights include Safari West, Annadel State Park and Pacific Coast Air Museum.

Complete your Santa Rosa trip with a car rental

  • After you've booked your hotel and cheap flight from Denver to Sonoma County Airport, the next task is choosing one of our car rentals in Santa Rosa. Check out the deals and easily compare options on pick-up convenience, price, and more.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.