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Cheap flights from Helena to San Francisco from $236

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 8/15. 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
4:48 pm - 11:44 pm
HLN
-
SFO
7h 56m
1 stop
Alaska Airlines Logo
9:40 am - 4:11 pm
SFO
-
HLN
5h 31m
1 stop
$360Alaska Airlines
Wed, Oct 28 - Sat, Oct 31
Alaska Airlines Logo
4:48 pm - 11:44 pm
HLN
-
SFO
7h 56m
1 stop
Alaska Airlines Logo
9:40 am - 4:11 pm
SFO
-
HLN
5h 31m
1 stop
$365Alaska Airlines
Wed, Oct 28 - Sat, Oct 31
Alaska Airlines Logo
4:41 pm - 9:35 pm
HLN
-
SFO
5h 54m
1 stop
Alaska Airlines Logo
8:30 am - 4:04 pm
SFO
-
HLN
6h 34m
1 stop
$381Alaska Airlines
Tue, Nov 3 - Wed, Nov 4
Alaska Airlines Logo
4:48 pm - 9:29 pm
HLN
-
SFO
5h 41m
1 stop
Alaska Airlines Logo
7:00 am - 4:11 pm
SFO
-
HLN
8h 11m
2 stops
$413Alaska Airlines
Wed, Oct 28 - Sat, Oct 31
Delta Logo
5:40 am - 8:50 am
HLN
-
SFO
4h 10m
1 stop
Delta Logo
5:50 am - 12:15 pm
SFO
-
HLN
5h 25m
1 stop
$414Delta
Thu, Aug 27 - Sat, Aug 29
Alaska Airlines Logo
4:48 pm - 11:44 pm
HLN
-
SFO
7h 56m
1 stop
Alaska Airlines Logo
7:40 am - 4:11 pm
SFO
-
HLN
7h 31m
2 stops
$416Alaska Airlines
Wed, Oct 28 - Sat, Oct 31
Delta Logo
12:55 pm - 9:19 pm
HLN
-
SFO
9h 24m
2 stops
Delta Logo
5:50 am - 12:15 pm
SFO
-
HLN
5h 25m
1 stop
$419Delta
Thu, Aug 27 - Sat, Aug 29
Alaska Airlines Logo
4:41 pm - 8:30 pm
HLN
-
SFO
4h 49m
1 stop
Alaska Airlines Logo
6:40 am - 4:04 pm
SFO
-
HLN
8h 24m
2 stops
$422Alaska Airlines
Tue, Nov 3 - Wed, Nov 4
Delta Logo
5:40 am - 1:31 pm
HLN
-
SFO
8h 51m
2 stops
Delta Logo
11:54 am - 10:30 pm
SFO
-
HLN
9h 36m
2 stops
$425Delta
Thu, Aug 27 - Sat, Aug 29
Alaska Airlines Logo
5:11 pm - 10:45 pm
HLN
-
SFO
6h 34m
1 stop
Alaska Airlines Logo
8:53 pm - 4:41 pm
SFO
-
HLN
18h 48m
1 stop
$454Alaska Airlines
Thu, Sep 3 - Mon, Sep 7

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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
Oct 28
HLN4:48 pmHelena
5h 41m
1 stop
SFO9:29 pmSan Francisco
Oct 31
SFO9:40 amSan Francisco
5h 31m
1 stop
HLN4:11 pmHelena
$360
Alaska Airlines
Aug 26
HLN5:11 pmHelena
6h 39m
1 stop
SFO10:50 pmSan Francisco
Sep 1
SFO6:00 amSan Francisco
9h 34m
1 stop
HLN4:34 pmHelena
$362
Alaska Airlines
Nov 3
HLN4:41 pmHelena
5h 54m
1 stop
SFO9:35 pmSan Francisco
Nov 4
SFO8:30 amSan Francisco
6h 34m
1 stop
HLN4:04 pmHelena
$381

Delta flights from Helena to San Francisco

Our best Delta deals on Helena to San Francisco flight tickets
Delta
Aug 27
HLN5:40 amHelena
4h 10m
1 stop
SFO8:50 amSan Francisco
Aug 29
SFO5:50 amSan Francisco
5h 25m
1 stop
HLN12:15 pmHelena
$414
Delta
Aug 27
HLN12:55 pmHelena
9h 24m
2 stops
SFO9:19 pmSan Francisco
Aug 29
SFO5:50 amSan Francisco
5h 25m
1 stop
HLN12:15 pmHelena
$419
Delta
Aug 27
HLN5:40 amHelena
8h 51m
2 stops
SFO1:31 pmSan Francisco
Aug 29
SFO11:54 amSan Francisco
9h 36m
2 stops
HLN10:30 pmHelena
$425

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 June 17, 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

Wed 10/28

4:48 pm-11:44 pm

1 stop7h 56m

San Francisco

Sat 10/31

9:40 am-4:11 pm

1 stop5h 31m

$360

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Wed 10/28

4:48 pm-11:44 pm

1 stop7h 56m

San Francisco

Sat 10/31

9:40 am-4:11 pm

1 stop5h 31m

$365

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 11/3

4:41 pm-9:35 pm

1 stop5h 54m

San Francisco

Wed 11/4

8:30 am-4:04 pm

1 stop6h 34m

$381

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Wed 10/28

4:48 pm-9:29 pm

1 stop5h 41m

San Francisco

Sat 10/31

7:00 am-4:11 pm

2 stops8h 11m

$413
Quickest round-trip

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 8/27

5:40 am-8:50 am

1 stop4h 10m

San Francisco

Sat 8/29

5:50 am-12:15 pm

1 stop5h 25m

$414

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Wed 10/28

4:48 pm-11:44 pm

1 stop7h 56m

San Francisco

Sat 10/31

7:40 am-4:11 pm

2 stops7h 31m

$416

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 8/27

12:55 pm-9:19 pm

2 stops9h 24m

San Francisco

Sat 8/29

5:50 am-12:15 pm

1 stop5h 25m

$419

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 11/3

4:41 pm-8:30 pm

1 stop4h 49m

San Francisco

Wed 11/4

6:40 am-4:04 pm

2 stops8h 24m

$422

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 8/27

5:40 am-1:31 pm

2 stops8h 51m

San Francisco

Sat 8/29

11:54 am-10:30 pm

2 stops9h 36m

$425

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 9/3

5:11 pm-10:45 pm

1 stop6h 34m

San Francisco

Mon 9/7

8:53 pm-4:41 pm

1 stop18h 48m

$454

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?

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 39% 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 10m

Direct flights

None
The fastest flight from Helena to San Francisco takes 4h 10m
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 10m 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
DeltaPriceFrom $238Free CancellationRating
7.8
8,406 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
Sonoma
Hayward
Bodega Bay
Roseville
Fremont
Walnut Creek
Santa Clara
South San Francisco
Berkeley
Vallejo
Sunnyvale
Salinas
Big Sur
Pacific Grove
Daly City
Burlingame
Calistoga

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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