When did momondo last update prices for flights from San Francisco Airport to Helena Airport?

Prices for flights from San Francisco Airport to Helena Airport refresh daily.

How many operators does momondo search for flights from San Francisco Airport to Helena Airport?

As of August 2026, there is 1 operator available to choose from for flights from San Francisco Airport to Helena Airport.

How old do you have to be to fly from San Francisco Airport to Helena Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Helena Airport.

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

The required travel and health documents for your Helena Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Helena Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$233 Cheap Flights from San Francisco to Helena in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Francisco to Helena

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:53 pm - 4:41 pmSFO San Francisco-HLN Helena

18h 48m1 stop Seattle/Tacoma Intl

5:18 pm - 9:39 pmHLN Helena-SFO San Francisco

5h 21m1 stop Seattle/Tacoma Intl

$353Alaska Airlines

Mon, Sep 21 - Tue, Sep 29

8:53 pm - 4:41 pmSFO San Francisco-HLN Helena

18h 48m1 stop Seattle/Tacoma Intl

5:18 pm - 10:53 amHLN Helena-SFO San Francisco

18h 35m2 stops Seattle/Tacoma Intl San Diego

$386Alaska Airlines

Mon, Sep 21 - Tue, Sep 29

2:30 pm - 10:24 pmSFO San Francisco-HLN Helena

6h 54m2 stops Los Angeles Salt Lake City

12:57 pm - 10:21 pmHLN Helena-SFO San Francisco

10h 24m2 stops Salt Lake City Los Angeles

$418Delta

Mon, Sep 21 - Tue, Sep 29

4:46 pm - 4:34 pmSFO San Francisco-HLN Helena

22h 48m1 stop Seattle/Tacoma Intl

5:18 pm - 10:59 amHLN Helena-SFO San Francisco

18h 41m1 stop Seattle/Tacoma Intl

$424Alaska Airlines

Sat, Sep 5 - Tue, Sep 8

6:21 pm - 4:34 pmSFO San Francisco-HLN Helena

21h 13m1 stop Seattle/Tacoma Intl

5:18 pm - 12:39 pmHLN Helena-SFO San Francisco

20h 21m2 stops Seattle/Tacoma Intl Portland

$438Alaska Airlines

Sat, Sep 5 - Tue, Sep 8

9:03 am - 4:34 pmSFO San Francisco-HLN Helena

6h 31m1 stop Seattle/Tacoma Intl

5:18 pm - 9:37 amHLN Helena-SFO San Francisco

17h 19m1 stop Seattle/Tacoma Intl

$472Alaska Airlines

Wed, Sep 2 - Thu, Sep 10

5:19 pm - 10:24 pmSFO San Francisco-HLN Helena

4h 05m1 stop Salt Lake City

12:57 pm - 4:24 pmHLN Helena-SFO San Francisco

4h 27m1 stop Salt Lake City

$483Delta

Fri, Sep 11 - Wed, Sep 16

7:00 am - 3:31 pmSFO San Francisco-HLN Helena

7h 31m1 stop Seattle/Tacoma Intl

4:08 pm - 10:09 pmHLN Helena-SFO San Francisco

7h 01m1 stop Seattle/Tacoma Intl

$488Alaska Airlines

Tue, Feb 2 - Sat, Feb 6

11:58 am - 10:24 pmSFO San Francisco-HLN Helena

9h 26m2 stops Los Angeles Salt Lake City

7:15 am - 12:19 pmHLN Helena-SFO San Francisco

6h 04m1 stop Salt Lake City

$488Delta

Fri, Sep 11 - Wed, Sep 16

5:17 pm - 4:34 pmSFO San Francisco-HLN Helena

22h 17m2 stops San Diego Seattle/Tacoma Intl

5:18 pm - 5:22 pmHLN Helena-SFO San Francisco

25h 04m2 stops Seattle/Tacoma Intl San Diego

$490Alaska Airlines

Sat, Sep 5 - Tue, Sep 8

Cheap last minute flights

Enter your travel dates to find the best prices.

2:20 pm - 9:30 pmSFO San Francisco-HLN Helena

6h 10m1 stop Denver Intl

6:15 am - 11:23 amHLN Helena-SFO San Francisco

6h 08m1 stop Denver Intl

$945United Airlines

Tue, Aug 11 - Thu, Aug 13

11:54 am - 10:30 pmSFO San Francisco-HLN Helena

9h 36m2 stops Los Angeles Salt Lake City

5:40 am - 8:50 amHLN Helena-SFO San Francisco

4h 10m1 stop Salt Lake City

$950Delta

Tue, Aug 11 - Thu, Aug 13

2:36 pm - 10:30 pmSFO San Francisco-HLN Helena

6h 54m2 stops Los Angeles Salt Lake City

12:55 pm - 9:19 pmHLN Helena-SFO San Francisco

9h 24m2 stops Salt Lake City Los Angeles

$955Delta

Tue, Aug 11 - Thu, Aug 13

5:08 pm - 10:30 pmSFO San Francisco-HLN Helena

4h 22m1 stop Salt Lake City

12:55 pm - 4:13 pmHLN Helena-SFO San Francisco

4h 18m1 stop Salt Lake City

$987Delta

Fri, Aug 7 - Tue, Aug 11

2:20 pm - 9:20 pmSFO San Francisco-HLN Helena

6h 00m1 stop Denver Intl

2:35 pm - 9:19 amHLN Helena-SFO San Francisco

19h 44m2 stops Denver Intl San Diego Carlsbad-Palomar

$988United Airlines

Fri, Aug 7 - Tue, Aug 11

11:54 am - 10:30 pmSFO San Francisco-HLN Helena

9h 36m2 stops Los Angeles Salt Lake City

5:40 am - 1:31 pmHLN Helena-SFO San Francisco

8h 51m2 stops Salt Lake City Los Angeles

$997Delta

Fri, Aug 7 - Tue, Aug 11

5:08 pm - 10:30 pmSFO San Francisco-HLN Helena

4h 22m1 stop Salt Lake City

5:40 am - 8:50 amHLN Helena-SFO San Francisco

4h 10m1 stop Salt Lake City

$1,029Delta

Fri, Aug 7 - Sun, Aug 9

11:54 am - 10:30 pmSFO San Francisco-HLN Helena

9h 36m2 stops Los Angeles Salt Lake City

5:40 am - 8:50 amHLN Helena-SFO San Francisco

4h 10m1 stop Salt Lake City

$1,034Delta

Fri, Aug 7 - Sun, Aug 9

5:50 am - 12:15 pmSFO San Francisco-HLN Helena

5h 25m1 stop Salt Lake City

12:55 pm - 4:13 pmHLN Helena-SFO San Francisco

4h 18m1 stop Salt Lake City

$1,154Delta

Fri, Aug 7 - Mon, Aug 10

2:36 pm - 10:30 pmSFO San Francisco-HLN Helena

6h 54m2 stops Los Angeles Salt Lake City

12:55 pm - 4:13 pmHLN Helena-SFO San Francisco

4h 18m1 stop Salt Lake City

$1,159Delta

Fri, Aug 7 - Mon, Aug 10

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Delta flights from San Francisco to Helena

Our best Delta deals on San Francisco to Helena flight tickets

Delta

Sep 21

SFO2:30 pmSan Francisco

6h 54m

2 stops

HLN10:24 pmHelena

Sep 29

HLN12:57 pmHelena

10h 24m

2 stops

SFO10:21 pmSan Francisco

$418

Delta

Sep 11

SFO5:19 pmSan Francisco

4h 05m

1 stop

HLN10:24 pmHelena

Sep 16

HLN12:57 pmHelena

4h 27m

1 stop

SFO4:24 pmSan Francisco

$483

Delta

Sep 11

SFO11:58 amSan Francisco

9h 26m

2 stops

HLN10:24 pmHelena

Sep 16

HLN7:15 amHelena

9h 39m

2 stops

SFO3:54 pmSan Francisco

$493

Alaska Airlines flights from San Francisco to Helena

Our best Alaska Airlines deals on San Francisco to Helena flight tickets

Alaska Airlines

Sep 21

SFO8:53 pmSan Francisco

18h 48m

1 stop

HLN4:41 pmHelena

Sep 29

HLN5:18 pmHelena

5h 21m

1 stop

SFO9:39 pmSan Francisco

$353

Alaska Airlines

Sep 21

SFO8:53 pmSan Francisco

18h 48m

1 stop

HLN4:41 pmHelena

Sep 29

HLN5:18 pmHelena

18h 35m

2 stops

SFO10:53 amSan Francisco

$386

Alaska Airlines

Sep 5

SFO4:46 pmSan Francisco

22h 48m

1 stop

HLN4:34 pmHelena

Sep 8

HLN5:18 pmHelena

18h 41m

1 stop

SFO10:59 amSan Francisco

$424

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Mon 9/21

8:53 pm-4:41 pm

1 stop18h 48m

Helena

Tue 9/29

5:18 pm-9:39 pm

1 stop5h 21m

$353

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Mon 9/21

8:53 pm-4:41 pm

1 stop18h 48m

Helena

Tue 9/29

5:18 pm-10:53 am

2 stops18h 35m

$386

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Mon 9/21

2:30 pm-10:24 pm

2 stops6h 54m

Helena

Tue 9/29

12:57 pm-10:21 pm

2 stops10h 24m

$418

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Sat 9/5

4:46 pm-4:34 pm

1 stop22h 48m

Helena

Tue 9/8

5:18 pm-10:59 am

1 stop18h 41m

$424

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Sat 9/5

6:21 pm-4:34 pm

1 stop21h 13m

Helena

Tue 9/8

5:18 pm-12:39 pm

2 stops20h 21m

$438

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Wed 9/2

9:03 am-4:34 pm

1 stop6h 31m

Helena

Thu 9/10

5:18 pm-9:37 am

1 stop17h 19m

$472

Quickest round-trip

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Fri 9/11

5:19 pm-10:24 pm

1 stop4h 05m

Helena

Wed 9/16

12:57 pm-4:24 pm

1 stop4h 27m

$483

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Tue 2/2

7:00 am-3:31 pm

1 stop7h 31m

Helena

Sat 2/6

4:08 pm-10:09 pm

1 stop7h 01m

$488

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Fri 9/11

11:58 am-10:24 pm

2 stops9h 26m

Helena

Wed 9/16

7:15 am-12:19 pm

1 stop6h 04m

$488

San FranciscoHelena

SFO San Francisco - HLN Helena

SFOHLN

San Francisco

Sat 9/5

5:17 pm-4:34 pm

2 stops22h 17m

Helena

Tue 9/8

5:18 pm-5:22 pm

2 stops25h 04m

$490

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Francisco 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 San Francisco to Helena?

Delta and Alaska Airlines are the most popular carriers operating from San Francisco 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 San Francisco according to our data. United Airlines is the first choice among our users, with 45% 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 San Francisco to Helena

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Helena according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap San Francisco to Helena (SFO to HLN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Helena

Fastest flight time	4h 05m
Direct flights	None

The fastest flight from San Francisco to Helena takes 4h 05m

There are no direct flights from San Francisco to Helena. There are no popular flight routes from San Francisco to Helena.

Search flight deals

Frequently asked questions about flying from San Francisco to Helena

How far is San Francisco to Helena by plane?
A flight from San Francisco to Helena will travel around 805.7 mi. Flights usually cover this in 4h 05m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from San Francisco Airport to Helena Airport?
Prices for flights from San Francisco Airport to Helena Airport refresh daily.
How many operators does momondo search for flights from San Francisco Airport to Helena Airport?
As of August 2026, there is 1 operator available to choose from for flights from San Francisco Airport to Helena Airport.
How old do you have to be to fly from San Francisco Airport to Helena Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Helena Airport.
What documentation or ID do you need to fly to Helena Airport?
The required travel and health documents for your Helena Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Helena Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from San Francisco to Helena?
Based on momondo bookings for this flight route, the most popular airline on flight routes from San Francisco to Helena is Delta (100% of total bookings).

Best airlines flying from San Francisco to Helena

Compare and see reviews for airlines that fly from San Francisco to Helena with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $215	Free Cancellation	Rating 7.8 8,491 reviews		Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Helena?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Francisco to Helena. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from San Francisco to Helena with flexible booking policies on momondo?

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

How can momondo help me find flights from San Francisco to Helena?

Once you have performed a search for San Francisco to Helena flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Helena from San Francisco. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.