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.

$253 Cheap Flights from Santa Rosa to Helena in 2026

Find the cheapest flights from Santa Rosa to Helena

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:19 am - 4:49 pmSTS Santa Rosa Sonoma County-HLN Helena

33h 30m2 stops San Diego Seattle/Tacoma Intl

5:26 pm - 9:59 amHLN Helena-STS Santa Rosa Sonoma County

41h 33m2 stops Seattle/Tacoma Intl San Diego

$510Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

4:35 pm - 4:49 pmSTS Santa Rosa Sonoma County-HLN Helena

23h 14m2 stops San Diego Seattle/Tacoma Intl

5:26 pm - 9:56 pmHLN Helena-STS Santa Rosa Sonoma County

5h 30m1 stop Seattle/Tacoma Intl

$511Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

5:06 pm - 4:49 pmSTS Santa Rosa Sonoma County-HLN Helena

22h 43m1 stop Seattle/Tacoma Intl

5:26 pm - 9:56 pmHLN Helena-STS Santa Rosa Sonoma County

5h 30m1 stop Seattle/Tacoma Intl

$523Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

6:19 am - 4:49 pmSTS Santa Rosa Sonoma County-HLN Helena

9h 30m2 stops San Diego Seattle/Tacoma Intl

5:26 pm - 1:06 pmHLN Helena-STS Santa Rosa Sonoma County

20h 40m1 stop Seattle/Tacoma Intl

$541Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

6:19 am - 4:49 pmSTS Santa Rosa Sonoma County-HLN Helena

33h 30m2 stops San Diego Seattle/Tacoma Intl

5:26 pm - 9:59 amHLN Helena-STS Santa Rosa Sonoma County

41h 33m2 stops Seattle/Tacoma Intl San Diego

$545Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

6:19 am - 4:49 pmSTS Santa Rosa Sonoma County-HLN Helena

9h 30m2 stops San Diego Seattle/Tacoma Intl

5:26 pm - 1:06 pmHLN Helena-STS Santa Rosa Sonoma County

20h 40m1 stop Seattle/Tacoma Intl

$551Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

7:00 am - 4:49 pmSTS Santa Rosa Sonoma County-HLN Helena

8h 49m1 stop Seattle/Tacoma Intl

5:26 pm - 1:06 pmHLN Helena-STS Santa Rosa Sonoma County

20h 40m1 stop Seattle/Tacoma Intl

$583Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

4:55 pm - 10:41 pmSTS Santa Rosa Sonoma County-HLN Helena

4h 46m1 stop Salt Lake City

5:45 am - 10:39 amHLN Helena-STS Santa Rosa Sonoma County

5h 54m1 stop Salt Lake City

$722Delta

Mon, Dec 21 - Tue, Dec 29

7:03 am - 4:34 pmSTS Santa Rosa Sonoma County-HLN Helena

8h 31m1 stop Seattle/Tacoma Intl

5:11 pm - 9:59 pmHLN Helena-STS Santa Rosa Sonoma County

5h 48m1 stop Seattle/Tacoma Intl

$800Alaska Airlines

Wed, Sep 2 - Sun, Sep 6

6:16 am - 4:34 pmSTS Santa Rosa Sonoma County-HLN Helena

9h 18m2 stops San Diego Seattle/Tacoma Intl

5:11 pm - 9:59 pmHLN Helena-STS Santa Rosa Sonoma County

5h 48m1 stop Seattle/Tacoma Intl

$843Alaska Airlines

Wed, Sep 2 - Sun, Sep 6

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Alaska Airlines flights from Santa Rosa to Helena

Our best Alaska Airlines deals on Santa Rosa to Helena flight tickets

Alaska Airlines

Oct 21

STS6:19 amSanta Rosa Sonoma County

33h 30m

2 stops

HLN4:49 pmHelena

Oct 24

HLN5:26 pmHelena

41h 33m

2 stops

STS9:59 amSanta Rosa Sonoma County

$510

Alaska Airlines

Oct 21

STS4:35 pmSanta Rosa Sonoma County

23h 14m

2 stops

HLN4:49 pmHelena

Oct 24

HLN5:26 pmHelena

5h 30m

1 stop

STS9:56 pmSanta Rosa Sonoma County

$511

Alaska Airlines

Oct 21

STS5:06 pmSanta Rosa Sonoma County

22h 43m

1 stop

HLN4:49 pmHelena

Oct 24

HLN5:26 pmHelena

5h 30m

1 stop

STS9:56 pmSanta Rosa Sonoma County

$523

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Wed 10/21

6:19 am-4:49 pm

2 stops33h 30m

Helena

Sat 10/24

5:26 pm-9:59 am

2 stops41h 33m

$510

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Wed 10/21

4:35 pm-4:49 pm

2 stops23h 14m

Helena

Sat 10/24

5:26 pm-9:56 pm

1 stop5h 30m

$511

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Wed 10/21

5:06 pm-4:49 pm

1 stop22h 43m

Helena

Sat 10/24

5:26 pm-9:56 pm

1 stop5h 30m

$523

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Wed 10/21

6:19 am-4:49 pm

2 stops9h 30m

Helena

Sat 10/24

5:26 pm-1:06 pm

1 stop20h 40m

$541

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Wed 10/21

6:19 am-4:49 pm

2 stops33h 30m

Helena

Sat 10/24

5:26 pm-9:59 am

2 stops41h 33m

$545

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Wed 10/21

6:19 am-4:49 pm

2 stops9h 30m

Helena

Sat 10/24

5:26 pm-1:06 pm

1 stop20h 40m

$551

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Wed 10/21

7:00 am-4:49 pm

1 stop8h 49m

Helena

Sat 10/24

5:26 pm-1:06 pm

1 stop20h 40m

$583

Quickest round-trip

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Mon 12/21

4:55 pm-10:41 pm

1 stop4h 46m

Helena

Tue 12/29

5:45 am-10:39 am

1 stop5h 54m

$722

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Wed 9/2

7:03 am-4:34 pm

1 stop8h 31m

Helena

Sun 9/6

5:11 pm-9:59 pm

1 stop5h 48m

$800

Santa RosaHelena

STS Santa Rosa Sonoma County - HLN Helena

STSHLN

Santa Rosa Sonoma County

Wed 9/2

6:16 am-4:34 pm

2 stops9h 18m

Helena

Sun 9/6

5:11 pm-9:59 pm

1 stop5h 48m

$843

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first

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 airline that flies from Santa Rosa Sonoma County to Helena?

Delta and Alaska Airlines are the most popular carriers operating from Santa Rosa Sonoma County to Helena

What airlines fly to Helena?

United Airlines, Alaska Airlines and Delta are the top three most popular airlines that fly to Helena from Santa Rosa according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 4 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

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

Best Price Found	$253
Fastest flight time	22h 00m
Direct flights	None

The best one-way flight to Helena from Santa Rosa in the past 72 hours is $253. The best round-trip flight deal from Santa Rosa to Helena found on momondo in the last 72 hours is $510.

The fastest flight from Santa Rosa to Helena takes 22h 00m

There are no direct flights from Santa Rosa to Helena. There are no popular flight routes from Santa Rosa to Helena.

Search flight deals

Frequently asked questions about flying from Santa Rosa to Helena

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 22h 00m, 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.