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Cheap flights from Helena to San Francisco from $183

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to San Francisco departing on 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Helena to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
5:11 pm - 10:50 pm
HLN
-
SFO
6h 39m
1 stop
Alaska Airlines Logo
7:22 pm - 4:34 pm
SFO
-
HLN
20h 12m
1 stop
$329Alaska Airlines
Sat, Aug 29 - Sat, Sep 5
Alaska Airlines Logo
5:11 pm - 10:58 am
HLN
-
SFO
18h 47m
1 stop
Alaska Airlines Logo
6:00 am - 4:34 pm
SFO
-
HLN
9h 34m
1 stop
$349Alaska Airlines
Tue, Sep 1 - Sun, Sep 6
Delta Logo
6:50 am - 3:50 pm
HLN
-
SFO
10h 00m
2 stops
Delta Logo
5:06 pm - 10:30 pm
SFO
-
HLN
4h 24m
1 stop
$360Delta
Sat, Aug 29 - Sat, Sep 5
Alaska Airlines Logo
5:11 pm - 10:58 am
HLN
-
SFO
18h 47m
1 stop
Alaska Airlines Logo
7:00 am - 4:34 pm
SFO
-
HLN
8h 34m
1 stop
$374Alaska Airlines
Tue, Sep 1 - Sun, Sep 6
Delta Logo
12:55 pm - 7:43 pm
HLN
-
SFO
7h 48m
2 stops
Delta Logo
5:50 am - 12:15 pm
SFO
-
HLN
5h 25m
1 stop
$380Delta
Tue, Sep 1 - Sun, Sep 6
Alaska Airlines Logo
5:11 pm - 10:45 pm
HLN
-
SFO
6h 34m
1 stop
Alaska Airlines Logo
5:16 pm - 4:34 pm
SFO
-
HLN
22h 18m
2 stops
$396Alaska Airlines
Thu, Aug 27 - Mon, Aug 31
Delta Logo
6:50 am - 3:50 pm
HLN
-
SFO
10h 00m
2 stops
Delta Logo
2:36 pm - 10:30 pm
SFO
-
HLN
6h 54m
2 stops
$418Delta
Sat, Aug 29 - Sat, Sep 5
Delta Logo
5:40 am - 1:31 pm
HLN
-
SFO
8h 51m
2 stops
Delta Logo
2:36 pm - 10:30 pm
SFO
-
HLN
6h 54m
2 stops
$418Delta
Tue, Sep 1 - Sun, Sep 6
United Airlines Logo
2:35 pm - 3:25 pm
HLN
-
SFO
25h 50m
2 stops
United Airlines Logo
9:07 pm - 1:45 pm
SFO
-
HLN
15h 38m
2 stops
$608United Airlines
Thu, Aug 27 - Mon, Aug 31
United Airlines Logo
6:15 am - 11:23 am
HLN
-
SFO
6h 08m
1 stop
United Airlines Logo
5:00 am - 1:45 pm
SFO
-
HLN
7h 45m
1 stop
$717United Airlines
Tue, Aug 18 - Fri, Aug 21

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Alaska Airlines flights from Helena to San Francisco

Our best Alaska Airlines deals on Helena to San Francisco flight tickets
Alaska Airlines
Aug 29
HLN5:11 pmHelena
6h 39m
1 stop
SFO10:50 pmSan Francisco
Sep 5
SFO7:22 pmSan Francisco
20h 12m
1 stop
HLN4:34 pmHelena
$329
Alaska Airlines
Sep 1
HLN5:11 pmHelena
18h 47m
1 stop
SFO10:58 amSan Francisco
Sep 6
SFO6:00 amSan Francisco
9h 34m
1 stop
HLN4:34 pmHelena
$349
Alaska Airlines
Sep 1
HLN5:11 pmHelena
18h 47m
1 stop
SFO10:58 amSan Francisco
Sep 6
SFO7:00 amSan Francisco
8h 34m
1 stop
HLN4:34 pmHelena
$374

Delta flights from Helena to San Francisco

Our best Delta deals on Helena to San Francisco flight tickets
Delta
Aug 29
HLN6:50 amHelena
10h 00m
2 stops
SFO3:50 pmSan Francisco
Sep 5
SFO5:06 pmSan Francisco
4h 24m
1 stop
HLN10:30 pmHelena
$360
Delta
Sep 1
HLN12:55 pmHelena
7h 48m
2 stops
SFO7:43 pmSan Francisco
Sep 6
SFO5:50 amSan Francisco
5h 25m
1 stop
HLN12:15 pmHelena
$380
Delta
Aug 29
HLN6:50 amHelena
10h 00m
2 stops
SFO3:50 pmSan Francisco
Sep 5
SFO2:36 pmSan Francisco
6h 54m
2 stops
HLN10:30 pmHelena
$418

momondo Fare Finder

 
Customize your flight search to find flights from Helena to San Francisco 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 August 1, 2026.
Use the filters below to find and compare flights from Helena to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 8/29

5:11 pm-10:50 pm

1 stop6h 39m

San Francisco

Sat 9/5

7:22 pm-4:34 pm

1 stop20h 12m

$329

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 9/1

5:11 pm-10:58 am

1 stop18h 47m

San Francisco

Sun 9/6

6:00 am-4:34 pm

1 stop9h 34m

$349

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 8/29

6:50 am-3:50 pm

2 stops10h 00m

San Francisco

Sat 9/5

5:06 pm-10:30 pm

1 stop4h 24m

$360

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 9/1

5:11 pm-10:58 am

1 stop18h 47m

San Francisco

Sun 9/6

7:00 am-4:34 pm

1 stop8h 34m

$374
Quickest round-trip

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 9/1

12:55 pm-7:43 pm

2 stops7h 48m

San Francisco

Sun 9/6

5:50 am-12:15 pm

1 stop5h 25m

$380

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 8/27

5:11 pm-10:45 pm

1 stop6h 34m

San Francisco

Mon 8/31

5:16 pm-4:34 pm

2 stops22h 18m

$396

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 8/29

6:50 am-3:50 pm

2 stops10h 00m

San Francisco

Sat 9/5

2:36 pm-10:30 pm

2 stops6h 54m

$418

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 9/1

5:40 am-1:31 pm

2 stops8h 51m

San Francisco

Sun 9/6

2:36 pm-10:30 pm

2 stops6h 54m

$418

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 8/27

2:35 pm-3:25 pm

2 stops25h 50m

San Francisco

Mon 8/31

9:07 pm-1:45 pm

2 stops15h 38m

$608

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 8/18

6:15 am-11:23 am

1 stop6h 08m

San Francisco

Fri 8/21

5:00 am-1:45 pm

1 stop7h 45m

$717

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

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

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 Helena to San Francisco?

Delta and Alaska Airlines are the most popular carriers operating from Helena to San Francisco

What airlines fly to San Francisco?

United Airlines, Alaska Airlines and Delta are the top three most popular airlines that fly to San Francisco from Helena according to our data. United Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 4 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

When to book flights from Helena to San Francisco

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

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

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

Fastest flight time

4h 18m

Direct flights

None
The fastest flight from Helena to San Francisco takes 4h 18m
There are no direct flights from Helena to San Francisco. There are no popular flight routes from Helena to San Francisco.
Search flight deals

Frequently asked questions about flying from Helena to San Francisco

  • How far is Helena to San Francisco by plane?

    The distance between Helena and San Francisco is about 805.7 mi. 4h 18m is a normal flight duration for this route.

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

    Prices for flights from Helena Airport to San Francisco Airport are updated daily.

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

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

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

    The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Helena to San Francisco?

Best airlines flying from Helena to San Francisco

Compare and see reviews for airlines that fly from Helena to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $238Free CancellationRating
7.9
12,742 reviews
Search Alaska Airlines flights
DeltaPriceFrom $238Free CancellationRating
7.8
8,498 reviews
Search Delta flights

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
South San Francisco
Fremont
Berkeley
Hayward
Walnut Creek
Bodega Bay
Sonoma
Roseville
Santa Clara
Vallejo
Salinas
Sunnyvale
Burlingame
Milpitas
Daly City
Palo Alto
Big Sur

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco from Helena.

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

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

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

momondo provides multiple filters to help you find the best flight to San Francisco from Helena. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to San Francisco from Helena 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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