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Cheap flights from Santa Rosa to Helena from $333

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Santa Rosa to Helena departing on 12/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Santa Rosa to Helena

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
2:24 pm - 5:55 pmSTS-HLN
26h 31m1 stop
Alaska Airlines Logo
6:32 pm - 10:17 pmHLN-STS
4h 45m1 stop
$333Alaska Airlines
Find Deal
Fri, Dec 19 - Wed, Dec 31
Alaska Airlines Logo
2:24 pm - 5:55 pmSTS-HLN
26h 31m1 stop
Alaska Airlines Logo
6:32 pm - 10:17 pmHLN-STS
4h 45m1 stop
$343Alaska Airlines
Find Deal
Fri, Dec 19 - Mon, Jan 5
Alaska Airlines Logo
2:24 pm - 5:55 pmSTS-HLN
26h 31m1 stop
Alaska Airlines Logo
6:32 pm - 10:35 amHLN-STS
17h 03m1 stop
$353Alaska Airlines
Find Deal
Sat, Dec 20 - Tue, Jan 6
Alaska Airlines Logo
2:24 pm - 5:55 pmSTS-HLN
26h 31m1 stop
Alaska Airlines Logo
6:32 pm - 10:17 pmHLN-STS
4h 45m1 stop
$363Alaska Airlines
Find Deal
Sat, Dec 20 - Mon, Jan 5
Alaska Airlines Logo
2:24 pm - 5:55 pmSTS-HLN
26h 31m1 stop
Alaska Airlines Logo
6:32 pm - 10:17 pmHLN-STS
4h 45m1 stop
$373Alaska Airlines
Find Deal
Wed, Dec 24 - Sun, Jan 4
Alaska Airlines Logo
2:24 pm - 5:55 pmSTS-HLN
26h 31m1 stop
Alaska Airlines Logo
6:32 pm - 9:24 amHLN-STS
15h 52m2 stops
$391Alaska Airlines
Find Deal
Fri, Dec 19 - Mon, Jan 5
Alaska Airlines Logo
2:24 pm - 5:55 pmSTS-HLN
26h 31m1 stop
Alaska Airlines Logo
6:32 pm - 12:18 amHLN-STS
30h 46m2 stops
$398Alaska Airlines
Find Deal
Fri, Dec 19 - Wed, Dec 31
Alaska Airlines Logo
2:24 pm - 5:55 pmSTS-HLN
26h 31m1 stop
Alaska Airlines Logo
6:32 pm - 8:58 amHLN-STS
39h 26m2 stops
$401Alaska Airlines
Find Deal
Fri, Dec 19 - Tue, Jan 6
Alaska Airlines Logo
7:00 am - 5:55 pmSTS-HLN
9h 55m2 stops
Alaska Airlines Logo
6:32 pm - 10:17 pmHLN-STS
4h 45m1 stop
$411Alaska Airlines
Find Deal
Thu, Dec 25 - Mon, Jan 5
Alaska Airlines Logo
7:00 am - 5:55 pmSTS-HLN
9h 55m2 stops
Alaska Airlines Logo
6:32 pm - 12:18 amHLN-STS
30h 46m2 stops
$414Alaska Airlines
Find Deal
Thu, Dec 25 - Wed, Dec 31

Alaska Airlines flights from Santa Rosa to Helena

Our best Alaska Airlines deals on Santa Rosa to Helena flight tickets
Alaska Airlines
Dec 19
STS2:24 pmSanta Rosa Sonoma County
26h 31m
1 stop
HLN5:55 pmHelena
Dec 31
HLN6:32 pmHelena
4h 45m
1 stop
STS10:17 pmSanta Rosa Sonoma County
$333
Find similar
Alaska Airlines
Dec 19
STS2:24 pmSanta Rosa Sonoma County
26h 31m
1 stop
HLN5:55 pmHelena
Jan 5
HLN6:32 pmHelena
4h 45m
1 stop
STS10:17 pmSanta Rosa Sonoma County
$343
Find similar
Alaska Airlines
Dec 20
STS2:24 pmSanta Rosa Sonoma County
26h 31m
1 stop
HLN5:55 pmHelena
Jan 6
HLN6:32 pmHelena
17h 03m
1 stop
STS10:35 amSanta Rosa Sonoma County
$353
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated October 23, 2025.
Use the filters below to find and compare flights from Santa Rosa to Helena that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Fri 12/19

2:24 pm-5:55 pm

1 stop26h 31m

Helena

Wed 12/31

6:32 pm-10:17 pm

1 stop4h 45m

$333

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Fri 12/19

2:24 pm-5:55 pm

1 stop26h 31m

Helena

Mon 1/5

6:32 pm-10:17 pm

1 stop4h 45m

$343

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Sat 12/20

2:24 pm-5:55 pm

1 stop26h 31m

Helena

Tue 1/6

6:32 pm-10:35 am

1 stop17h 03m

$353

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Sat 12/20

2:24 pm-5:55 pm

1 stop26h 31m

Helena

Mon 1/5

6:32 pm-10:17 pm

1 stop4h 45m

$363

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Wed 12/24

2:24 pm-5:55 pm

1 stop26h 31m

Helena

Sun 1/4

6:32 pm-10:17 pm

1 stop4h 45m

$373

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Fri 12/19

2:24 pm-5:55 pm

1 stop26h 31m

Helena

Mon 1/5

6:32 pm-9:24 am

2 stops15h 52m

$391

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Fri 12/19

2:24 pm-5:55 pm

1 stop26h 31m

Helena

Wed 12/31

6:32 pm-12:18 am

2 stops30h 46m

$398

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Fri 12/19

2:24 pm-5:55 pm

1 stop26h 31m

Helena

Tue 1/6

6:32 pm-8:58 am

2 stops39h 26m

$401

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Thu 12/25

7:00 am-5:55 pm

2 stops9h 55m

Helena

Mon 1/5

6:32 pm-10:17 pm

1 stop4h 45m

$411

Santa RosaHelena

STS - HLN

STSHLN

Santa Rosa Sonoma County

Thu 12/25

7:00 am-5:55 pm

2 stops9h 55m

Helena

Wed 12/31

6:32 pm-12:18 am

2 stops30h 46m

$414

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Helena from

How to get the cheapest flight ticket from Santa Rosa to Helena

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Helena?

The cheapest day to depart from Santa Rosa to Helena is on a Monday. Travelers who choose to depart for Helena on a Monday will often find tickets for as low as $350. The most expensive day to fly to Helena is Sunday, with ticket prices averaging around $706.

What is the cheapest time of day to depart on your flight to Helena?

According to our data, the cheapest time of day to fly to Helena is in the afternoon. momondo users have found flights departing from Santa Rosa to Helena in the afternoon for as low as $386. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Helena is at noon when prices are around $950.

When to book flights from Santa Rosa to Helena

Are you open to changing your travel dates? Check out the ideal times to fly from Santa Rosa to Helena according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Santa Rosa to Helena (STS to HLN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Santa Rosa to Helena

Direct flights

None
There are no direct flights from Santa Rosa to Helena. There are no popular flight routes from Santa Rosa to Helena.
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  • How far is Santa Rosa Sonoma County to Helena by plane?

    Santa Rosa Sonoma County and Helena are 781.0 mi apart from one another. Flights usually cover this in 9h 55m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Santa Rosa Sonoma County Airport to Helena Airport?

    Prices for flights from Santa Rosa Sonoma County Airport to Helena Airport are updated daily.

  • How old do you have to be to fly from Santa Rosa Sonoma County Airport to Helena Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Santa Rosa Sonoma County Airport to Helena Airport.

  • What documentation or ID do you need to fly to Helena Airport?

    The necessary travel and health documents for your Helena Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Santa Rosa to Helena?

It is quick and easy to find Santa Rosa to Helena flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Helena that suits you.

Can I find flights from Santa Rosa to Helena with flexible booking policies on momondo?

All flight searches from Santa Rosa to Helena on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Santa Rosa to Helena?

momondo helps you find the best flight between Santa Rosa and Helena by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Santa Rosa to Helena right now. Can momondo alert me if prices change?

Price alerts on flights to Helena from Santa Rosa are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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