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Cheap flights from Helena to San Francisco from $271

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to San Francisco departing on 4/2. 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

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Find the cheapest flights from Helena to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
5:30 am - 8:56 am
HLN
-
SFO
4h 26m
1 stop
Delta Logo
5:40 am - 12:21 pm
SFO
-
HLN
5h 41m
1 stop
$271Delta
Thu, Apr 2 - Wed, Apr 8
Delta Logo
5:30 am - 8:56 am
HLN
-
SFO
4h 26m
1 stop
Delta Logo
5:40 am - 12:21 pm
SFO
-
HLN
5h 41m
1 stop
$286Delta
Thu, Apr 2 - Wed, Apr 8
Alaska Airlines Logo
6:22 pm - 10:27 pm
HLN
-
SFO
5h 05m
1 stop
Alaska Airlines Logo
11:13 am - 5:45 pm
SFO
-
HLN
5h 32m
1 stop
$291Alaska Airlines
Wed, Apr 1 - Wed, Apr 8
Alaska Airlines Logo
6:22 pm - 11:44 pm
HLN
-
SFO
6h 22m
1 stop
Alaska Airlines Logo
10:25 am - 5:45 pm
SFO
-
HLN
6h 20m
1 stop
$295Alaska Airlines
Thu, Apr 30 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 11:44 pm
HLN
-
SFO
6h 22m
1 stop
Alaska Airlines Logo
10:25 am - 5:45 pm
SFO
-
HLN
6h 20m
1 stop
$300Alaska Airlines
Thu, May 7 - Tue, May 12
Delta Logo
5:30 am - 8:56 am
HLN
-
SFO
4h 26m
1 stop
Delta Logo
5:40 am - 12:21 pm
SFO
-
HLN
5h 41m
1 stop
$310Delta
Thu, Apr 2 - Tue, Apr 7
Alaska Airlines Logo
6:22 pm - 10:27 pm
HLN
-
SFO
5h 05m
1 stop
Alaska Airlines Logo
1:35 pm - 5:45 pm
SFO
-
HLN
27h 10m
1 stop
$317Alaska Airlines
Wed, Apr 1 - Tue, Apr 7
Alaska Airlines Logo
6:22 pm - 11:44 pm
HLN
-
SFO
6h 22m
1 stop
Alaska Airlines Logo
5:57 pm - 5:45 pm
SFO
-
HLN
22h 48m
2 stops
$329Alaska Airlines
Thu, Apr 30 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 8:46 am
HLN
-
SFO
15h 24m
2 stops
Alaska Airlines Logo
8:52 pm - 4:06 pm
SFO
-
HLN
18h 14m
1 stop
$336Alaska Airlines
Sat, May 9 - Fri, May 15
Alaska Airlines Logo
6:22 pm - 10:27 pm
HLN
-
SFO
5h 05m
1 stop
Alaska Airlines Logo
9:07 pm - 5:45 pm
SFO
-
HLN
19h 38m
2 stops
$349Alaska Airlines
Wed, Apr 1 - Tue, Apr 7

Alaska Airlines flights from Helena to San Francisco

Our best Alaska Airlines deals on Helena to San Francisco flight tickets
Alaska Airlines
Apr 1
HLN6:22 pmHelena
5h 05m
1 stop
SFO10:27 pmSan Francisco
Apr 8
SFO11:13 amSan Francisco
5h 32m
1 stop
HLN5:45 pmHelena
$291
Alaska Airlines
Apr 30
HLN6:22 pmHelena
6h 22m
1 stop
SFO11:44 pmSan Francisco
May 5
SFO10:25 amSan Francisco
6h 20m
1 stop
HLN5:45 pmHelena
$295
Alaska Airlines
May 7
HLN6:22 pmHelena
6h 22m
1 stop
SFO11:44 pmSan Francisco
May 12
SFO10:25 amSan Francisco
6h 20m
1 stop
HLN5:45 pmHelena
$300

Delta flights from Helena to San Francisco

Our best Delta deals on Helena to San Francisco flight tickets
Delta
Apr 2
HLN5:30 amHelena
4h 26m
1 stop
SFO8:56 amSan Francisco
Apr 8
SFO5:40 amSan Francisco
5h 41m
1 stop
HLN12:21 pmHelena
$271
Delta
Apr 2
HLN5:30 amHelena
4h 26m
1 stop
SFO8:56 amSan Francisco
Apr 8
SFO5:40 amSan Francisco
5h 41m
1 stop
HLN12:21 pmHelena
$286
Delta
Apr 2
HLN5:30 amHelena
4h 26m
1 stop
SFO8:56 amSan Francisco
Apr 7
SFO5:40 amSan Francisco
5h 41m
1 stop
HLN12:21 pmHelena
$310

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 March 16, 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
Quickest round-trip

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 4/2

5:30 am-8:56 am

1 stop4h 26m

San Francisco

Wed 4/8

5:40 am-12:21 pm

1 stop5h 41m

$271

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 4/2

5:30 am-8:56 am

1 stop4h 26m

San Francisco

Wed 4/8

5:40 am-12:21 pm

1 stop5h 41m

$286

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Wed 4/1

6:22 pm-10:27 pm

1 stop5h 05m

San Francisco

Wed 4/8

11:13 am-5:45 pm

1 stop5h 32m

$291

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 4/30

6:22 pm-11:44 pm

1 stop6h 22m

San Francisco

Tue 5/5

10:25 am-5:45 pm

1 stop6h 20m

$295

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 5/7

6:22 pm-11:44 pm

1 stop6h 22m

San Francisco

Tue 5/12

10:25 am-5:45 pm

1 stop6h 20m

$300

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 4/2

5:30 am-8:56 am

1 stop4h 26m

San Francisco

Tue 4/7

5:40 am-12:21 pm

1 stop5h 41m

$310

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Wed 4/1

6:22 pm-10:27 pm

1 stop5h 05m

San Francisco

Tue 4/7

1:35 pm-5:45 pm

1 stop27h 10m

$317

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 4/30

6:22 pm-11:44 pm

1 stop6h 22m

San Francisco

Tue 5/5

5:57 pm-5:45 pm

2 stops22h 48m

$329

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 5/9

6:22 pm-8:46 am

2 stops15h 24m

San Francisco

Fri 5/15

8:52 pm-4:06 pm

1 stop18h 14m

$336

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Wed 4/1

6:22 pm-10:27 pm

1 stop5h 05m

San Francisco

Tue 4/7

9:07 pm-5:45 pm

2 stops19h 38m

$349

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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?

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to San Francisco from Helena according to our data. Alaska Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 5 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 26m

Direct flights

None
The fastest flight from Helena to San Francisco takes 4h 26m
There are no direct flights from Helena to San Francisco. There are no popular flight routes from Helena to San Francisco.
Search flight deals

  • How far is Helena to San Francisco by plane?

    The distance between Helena and San Francisco is about 805.5 mi. 4h 26m 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
12,052 reviews
Search Alaska Airlines 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
Sonoma
Bodega Bay
Walnut Creek
Roseville
Hayward
Berkeley
Santa Clara
Big Sur
Fremont
Calistoga
Vallejo
Salinas
Half Moon Bay
Daly City
Milpitas
Pacific Grove
South San Francisco

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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