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.

In terms of precipitation, rainfall in Helena ranges from 0.3 - 2.1 inches per month. June is typically the wettest month, when rainfall can reach 2.1 in. February is typically the driest time to visit Helena when rainfall is around 0.3 in.

If weather is an important factor for your trip to Helena, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 21.2 F).

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

When flying from Santa Rosa to Helena, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Santa Rosa-Helena flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Santa Rosa-Helena flight deals on Cheapflights vs. Expedia 90-95% of the time. Price accuracy is based on data collected from Santa Rosa-Helena flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Santa Rosa-Helena flights, Cheapflights users trust Expedia the most. Expedia 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-Helena flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$318+ Flights from Santa Rosa to Helena

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Cheap flight deals from Santa Rosa to Helena

Most accurate provider	Expedia 2 stars
Most trusted provider	Expedia 3 stars
Round-trip from	$318 (Alaska Airlines)
Popular in	March
Cheapest in	October

Provider with most accurate pricing for Santa Rosa Sonoma County-Helena flight deals.

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Provider most trusted by Cheapflights users for Santa Rosa Sonoma County-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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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 November 17, 2025.

Wed 1/2811:15 amSTS - HLN

1 stop5h 56mAlaska Airlines

Fri 1/306:48 pmHLN - STS

1 stop6h 11mAlaska Airlines

Deal found 11/15

$318

Fly from

Fly to

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-11:59 pm

1 stop6h 11m

$318

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/15

Most accurate provider: When it comes to deals on Santa Rosa-Helena flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Santa Rosa-Helena flight deals on Cheapflights vs. Expedia 90-95% of the time. Price accuracy is based on data collected from Santa Rosa-Helena flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Santa Rosa-Helena flights, Cheapflights users trust Expedia the most. Expedia 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-Helena 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 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

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.

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$318+ 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.

Find cheap flights from Santa Rosa to Helena with Cheapflights

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Cheap flight deals from Santa Rosa to Helena

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Round-trip from

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Find flight deals from Santa Rosa to Helena

Best flights from Santa Rosa to HelenaDiscover 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 November 17, 2025.

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 November 17, 2025.

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Use the filters below to find and compare flights from Santa Rosa to Helena that are best for you.

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.

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?

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?

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

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

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

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

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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 November 17, 2025.