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$332+ Cheap flights from Santa Rosa to Helena (STS - HLN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
STS — HLN
Dec 31 — Jan 71
Wed 12/31
Wed 1/7
1 adult, Economy
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Cheap flight deals from Santa Rosa to Helena

Discover tips and strategies to find the most affordable flight options for your journey from Santa Rosa (STS) to Helena (HLN). 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 December 1, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$332
(Alaska Airlines)

Popular in

March

Cheapest in

October

Average price

$670
Provider with most accurate pricing for San Francisco-Helena flight deals.
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Provider most trusted by Cheapflights users for San Francisco-Helena flights.
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From Santa Rosa Sonoma County to Helena
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Highest demand for flights based on searches. 27% potential increase in price ($221 potential increase over avg. RT price).
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Cheapest flight prices on average. 11% potential price decrease ($58 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Find flight deals from Santa Rosa to Helena

Best flights from Santa Rosa to Helena
Discover carefully curated flight deals from Santa Rosa to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 1, 2025.

This Alaska Airlines deal was found by Cheapflights users on 11/30. 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 1/2811:15 amSTS - HLN
1 stop5h 56mAlaska Airlines
Fri 1/306:48 pmHLN - STS
1 stop16h 47mAlaska Airlines
Deal found 11/30$332

Cheapflights Fare Finder

 
Customize your flight search to find flights from Santa Rosa to Helena 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 December 1, 2025.
Use the filters below to find and compare flights from Santa Rosa to Helena that are best for you.

Fly from

Santa Rosa

Fly to

Helena

Route

Depart

Return

Price

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Wed 1/28

11:15 am-6:11 pm

1 stop5h 56m

Helena

Fri 1/30

6:48 pm-10:35 am

1 stop16h 47m

$332

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/30

Best time to book a flight from Santa Rosa to Helena

Have a flexible travel schedule? Discover the best time to fly to Helena 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 Helena

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

Currently, August is the cheapest month in which you can book a flight from Santa Rosa to Helena (average of $44). Flying from Santa Rosa to Helena in April is currently the most expensive (average of $223). 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.

Related info for your journey

Find useful and relevant information for your journey from Santa Rosa to Helena. 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 Helena?

    Departing from Santa Rosa to Helena will take you 5h 56m. Santa Rosa and Helena are separated by a distance of 783 mi.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Santa Rosa to Helena (average of $44). Flying from Santa Rosa to Helena in April is currently the most expensive (average of $223). 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

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