Cheap United flights from Denver to Santa Rosa (DEN to STS)

Find The Best Day To Fly from Denver to Santa Rosa

STS From DEN Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Sonesta Emeryville - San Francisco Bay Bridge

Sonesta Emeryville - San Francisco Bay Bridge

3 out of 5
Price was $670, price is now $466 per person
$466
per person
Nov 26 - Dec 1
found 1 day ago
Roundtrip flight included
Denver (DEN) to Oakland (OAK)
Claremont Resort & Club

Claremont Resort & Club

5 out of 5
Save 100% on your flight
Price was $2,212, price is now $1,285 per person
$1,285
per person
Nov 26 - Dec 1
found 1 day ago
Roundtrip flight included
Denver (DEN) to Oakland (OAK)
Big & Beautiful 6 Bedroom 2.5 Bath

Big & Beautiful 6 Bedroom 2.5 Bath

3 out of 5
Save 100% on your flight
Price was $1,611, price is now $1,096 per person
$1,096
per person
Nov 26 - Dec 1
found 1 day ago
Roundtrip flight included
Denver (DEN) to Oakland (OAK)
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Frequently asked questions

Can I catch a flight from DIA airport to Sonoma County Airport right now?
For any present Sonoma County Airport (STS) travel advice and quarantine requirements, go to our Covid-19 Travel Advisor. Check before you book your flight, so you don't get caught out en route.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Sonoma County Airport (STS), please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Denver DEN to Santa Rosa STS 

To find the best deals on flights to Denver from Santa Rosa with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Denver DEN to Santa Rosa STS with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from to , it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Denver DEN to Santa Rosa STS 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Denver to Santa Rosa costs from . Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Santa Rosa STS from  Denver DEN with United 

To find a cheap United flight from Denver DEN to Santa Rosa STS, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Denver DEN to Santa Rosa STS 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as , or if you book a flight with a stopover. 

 

Find nonstop flights from Denver DEN to Santa Rosa STS with United 

If you’re keen to be on Santa Rosa soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Denver DEN to Santa Rosa STS 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to Santa Rosa STS from  Denver DEN with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

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A full-service spa, 2 outdoor pools, and 4 hot tubs are all featured at this smoke-free hotel. There's fun for all ages with a children's pool and a playground, ...
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Hilton Garden Inn Sonoma County Airport

Hilton Garden Inn Sonoma County Airport

3 out of 5
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Vinarosa Resort & Spa

Vinarosa Resort & Spa

4 out of 5
4350 Barnes Road Santa Rosa CA
A full-service spa, a 24-hour gym, and a restaurant are all featured at this Tuscan-style hotel. Enjoy the outdoor pool and perks like free WiFi. Enjoy the hot ...
9.4/10 Exceptional! (956 reviews)
"Beautiful setting, and grounds. Very comfortable bedding and bedding. Highly reccomend"

Reviewed on Oct 12, 2026

Vinarosa Resort & Spa
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

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*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.