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$101+ Cheap flights from Santa Rosa to Denver (STS - DEN)

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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
STS — DEN
Oct 26 — Nov 21
Sun 10/26
Sun 11/2
1 adult, Economy
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Cheapflights Tip: The best prices from Santa Rosa Sonoma County to Denver Intl are usually found in September or February, booked 40 days in advance, depart on a Thursday or Tuesday and return on a Sunday

Cheap flight deals from Santa Rosa to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Santa Rosa (STS) to Denver (DEN). 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 September 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$159
(Kiwi.com)

One-way from

$101
(Alaska Airlines)

Popular in

July

Cheapest in

September

Average price

$369
Provider with most accurate pricing for Santa Rosa Sonoma County-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Santa Rosa Sonoma County-Denver Intl flights.
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From Santa Rosa Sonoma County to Denver Intl
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One-way flight from Santa Rosa Sonoma County to Denver Intl
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Highest demand for flights based on searches. 22% potential increase in price ($139 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Santa Rosa to Denver

Cheapest flights from Santa Rosa to Denver
Explore the most affordable flight options available from Santa Rosa to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 26, 2025.

This Trip.com deal was found by Cheapflights users on 9/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:46 pmSTS - DEN
1 stop22h 20mHawaiian Airlines
Mon 11/178:20 amDEN - STS
1 stop28h 00mHawaiian Airlines
Deal found 9/24$176
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Tue 11/116:49 amSTS - DEN
1 stop11h 17mAlaska Airlines
Tue 12/96:59 pmDEN - STS
1 stop20h 37mAlaska Airlines
Deal found 9/24$203
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Wed 10/226:25 amSTS - DEN
1 stop6h 35mAlaska Airlines
Mon 10/277:19 pmDEN - STS
1 stop21h 43mAlaska Airlines
Deal found 9/24$209
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Mon 11/107:46 pmSTS - DEN
1 stop22h 20mAlaska Airlines
Wed 12/36:59 pmDEN - STS
1 stop4h 55mAlaska Airlines
Deal found 9/24$212
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Sat 10/256:25 amSTS - DEN
1 stop6h 35mAlaska Airlines
Mon 10/277:19 pmDEN - STS
1 stop21h 43mAlaska Airlines
Deal found 9/24$219
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Wed 10/226:25 amSTS - DEN
1 stop6h 35mAlaska Airlines
Wed 10/2912:49 pmDEN - STS
2 stops9h 57mAlaska Airlines
Deal found 9/24$221
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Mon 11/107:46 pmSTS - DEN
1 stop14h 48mAlaska Airlines
Thu 12/46:59 pmDEN - STS
1 stop4h 55mAlaska Airlines
Deal found 9/24$229
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Sat 10/256:25 amSTS - DEN
1 stop6h 35mAlaska Airlines
Wed 10/2912:49 pmDEN - STS
2 stops9h 57mAlaska Airlines
Deal found 9/24$231
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Sun 11/166:49 amSTS - DEN
1 stop11h 17mAlaska Airlines
Fri 12/56:59 pmDEN - STS
1 stop4h 55mAlaska Airlines
Deal found 9/24$236
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Tue 10/2810:50 amSTS - DEN
2 stops12h 01mAlaska Airlines
Wed 10/298:20 amDEN - STS
2 stops14h 26mAlaska Airlines
Deal found 9/24$239
This Alaska Airlines deal was found by Cheapflights users on 9/25. 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.
Tue 12/92:21 pmSTS - DEN
2 stops19h 24mAlaska Airlines
Sat 12/1310:05 amDEN - STS
1 stop13h 49mAlaska Airlines
Deal found 9/25$240

Cheapflights Fare Finder

 
Customize your flight search to find flights from Santa Rosa to Denver 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 September 26, 2025.
Use the filters below to find and compare flights from Santa Rosa to Denver that are best for you.

Fly from

Santa Rosa

Fly to

Denver

Route

Depart

Return

Price

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Tue 1/13

7:28 pm-11:51 pm

1 stop27h 23m

Denver Intl

Wed 1/21

7:04 pm-10:46 pm

1 stop4h 42m

$203

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Tue 12/9

8:00 am-7:24 pm

1 stop10h 24m

Denver Intl

Sat 12/13

6:59 pm-10:54 pm

1 stop4h 55m

$203

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Wed 10/22

6:25 am-2:00 pm

1 stop6h 35m

Denver Intl

Mon 10/27

7:19 pm-4:02 pm

1 stop21h 43m

$209

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Mon 2/2

6:58 am-11:19 am

1 stop27h 21m

Denver Intl

Fri 2/6

12:30 pm-11:07 am

1 stop23h 37m

$209

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Mon 11/10

7:46 pm-11:51 pm

1 stop27h 05m

Denver Intl

Sat 12/6

6:59 pm-10:54 pm

1 stop4h 55m

$212

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Sat 10/25

6:25 am-2:00 pm

1 stop6h 35m

Denver Intl

Mon 10/27

7:19 pm-4:02 pm

1 stop21h 43m

$219

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Sat 10/25

6:25 am-2:00 pm

1 stop6h 35m

Denver Intl

Wed 10/29

12:49 pm-9:46 pm

2 stops9h 57m

$231

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Sat 10/25

6:25 am-2:00 pm

1 stop6h 35m

$101

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Tue 10/21

7:53 pm-11:47 pm

1 stop26h 54m

$107

Santa RosaDenver

STS - DEN

STSDEN

Santa Rosa Sonoma County

Sat 11/22

7:43 pm-11:59 pm

1 stop27h 16m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/25

Showing 1-10 of 14 results
1
2

Compare providers for flights from Santa Rosa to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Santa Rosa to Denver in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Santa Rosa-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Santa Rosa-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Santa Rosa-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Santa Rosa-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Santa Rosa-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Santa Rosa to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Santa Rosa 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 Santa Rosa to Denver

How far ahead should I book a flight from Santa Rosa to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Santa Rosa to Denver. Price data was last updated on September 19, 2025.

Booking 40 days in advance of your planned departure date is, on average, the best time to get cheap flights from Santa Rosa to Denver. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Santa Rosa to Denver?

Currently, October is the cheapest month in which you can book a flight from Santa Rosa to Denver (average of $197). Flying from Santa Rosa to Denver in March is currently the most expensive (average of $278). 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.

What is the cheapest time of day to fly from STS to DEN?

Find hourly flight availability from Santa Rosa to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 26, 2025.

One of the essential ways to save on airfare from Santa Rosa to Denver is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 29% on airfare.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated September 26, 2025.
Read through reviews of airlines operating flights from Santa Rosa to Denver, such as Alaska Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Santa Rosa to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Santa Rosa to Denver?

    Airlines like Alaska Airlines fly from Santa Rosa to Denver in about 27h 23m. The time it takes to get you to your destination can typically vary by up to . The distance between Santa Rosa and Denver is about 974 mi.

  • What are the cheapest airlines flying from Santa Rosa to Denver round-trip?

    Our cheapest airline available from Santa Rosa to Denver is Alaska Airlines. Our recent data shows that you can find tickets from as low as $282 on this airline. An additional option worth looking into is American Airlines, starting at $300. Users have found that Alaska Airlines is 41% cheaper than the other options available to this destination.

  • Can I find deals for flights from Santa Rosa to Denver that include hotel bookings?

    Yes. In addition to deals on Santa Rosa to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Santa Rosa to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Santa Rosa to Denver.

  • Can I find deals for business class flights from Santa Rosa to Denver?

    Yes. Cheapflights offers flight deals from Santa Rosa to Denver 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 Santa Rosa to Denver?

    Currently, October is the cheapest month in which you can book a flight from Santa Rosa to Denver (average of $197). Flying from Santa Rosa to Denver in March is currently the most expensive (average of $278). 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 Denver?

Book flights to Denver if you plan to visit one of these locations
Black Hawk
Westminster
Golden
Broomfield
Winter Park
Lakewood
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker
Sterling

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Top 2 airlines flying from Santa Rosa to Denver

Discover the top 2 airlines that operate flights from Santa Rosa to Denver. 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 September 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$282Average$503FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$300Average$538FlexibilityNo cancel feeOn-time71%

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