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Cheap flights from Helena to San Francisco from $256

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 10/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Helena to San Francisco

Cheap round-trip flights

Hawaiian Airlines Logo
6:18 pm - 10:29 pmHLN-SFO
5h 11m1 stop
Hawaiian Airlines Logo
11:40 am - 5:36 pmSFO-HLN
4h 56m1 stop
$256Hawaiian Airlines
Find Deal
Sat, Oct 18 - Mon, Oct 27
Delta Logo
1:00 pm - 11:33 pmHLN-SFO
11h 33m2 stops
Delta Logo
6:00 am - 12:20 pmSFO-HLN
5h 20m1 stop
$304Delta
Find Deal
Sat, Oct 18 - Mon, Oct 27
Delta Logo
1:00 pm - 11:33 pmHLN-SFO
11h 33m2 stops
Delta Logo
6:15 am - 12:20 pmSFO-HLN
29h 05m2 stops
$315Delta
Find Deal
Sat, Oct 18 - Mon, Oct 27
Delta Logo
12:50 pm - 6:42 pmHLN-SFO
6h 52m1 stop
Delta Logo
5:45 am - 12:27 pmSFO-HLN
5h 42m1 stop
$349Delta
Find Deal
Sat, Mar 7 - Wed, Mar 11
Delta Logo
12:50 pm - 4:29 pmHLN-SFO
4h 39m1 stop
Delta Logo
5:45 am - 12:27 pmSFO-HLN
5h 42m1 stop
$374Delta
Find Deal
Sat, Mar 7 - Wed, Mar 11
Alaska Airlines Logo
6:32 pm - 9:33 amHLN-SFO
16h 01m1 stop
Alaska Airlines Logo
10:13 am - 5:55 pmSFO-HLN
6h 42m1 stop
$453Alaska Airlines
Find Deal
Mon, Dec 29 - Fri, Jan 2
Alaska Airlines Logo
6:32 pm - 11:54 pmHLN-SFO
6h 22m1 stop
Alaska Airlines Logo
5:42 pm - 5:55 pmSFO-HLN
23h 13m1 stop
$464Alaska Airlines
Find Deal
Sun, Dec 28 - Sat, Jan 3
United Airlines Logo
5:18 pm - 8:43 amHLN-SFO
16h 25m2 stops
United Airlines Logo
10:40 pm - 4:40 pmSFO-HLN
17h 00m2 stops
$646United Airlines
Find Deal
Thu, Oct 16 - Sun, Oct 19
United Airlines Logo
6:30 am - 5:19 pmHLN-SFO
11h 49m1 stop
United Airlines Logo
11:00 pm - 2:09 pmSFO-HLN
14h 09m2 stops
$761United Airlines
Find Deal
Thu, Oct 16 - Thu, Oct 16
Logo
6:18 pm - 11:54 amHLN-SFO
18h 36m3 stops
Logo
7:00 am - 5:36 pmSFO-HLN
9h 36m2 stops
$838
Find Deal
Sat, Oct 18 - Mon, Oct 27

Alaska Airlines flights from Helena to San Francisco

Our best Alaska Airlines deals on Helena to San Francisco flight tickets
Alaska Airlines
Dec 29
HLN6:32 pmHelena
16h 01m
1 stop
SFO9:33 amSan Francisco
Jan 2
SFO10:13 amSan Francisco
6h 42m
1 stop
HLN5:55 pmHelena
$453
Find similar
Alaska Airlines
Dec 28
HLN6:32 pmHelena
6h 22m
1 stop
SFO11:54 pmSan Francisco
Jan 3
SFO5:42 pmSan Francisco
23h 13m
1 stop
HLN5:55 pmHelena
$464
Find similar
Alaska Airlines
Dec 29
HLN6:32 pmHelena
16h 01m
1 stop
SFO9:33 amSan Francisco
Jan 3
SFO7:00 amSan Francisco
9h 55m
1 stop
HLN5:55 pmHelena
$478
Find similar

United Airlines flights from Helena to San Francisco

Our best United Airlines deals on Helena to San Francisco flight tickets
United Airlines
Oct 16
HLN5:18 pmHelena
16h 25m
2 stops
SFO8:43 amSan Francisco
Oct 19
SFO10:40 pmSan Francisco
17h 00m
2 stops
HLN4:40 pmHelena
$646
Find similar
United Airlines
Sep 22
HLN5:20 pmHelena
6h 50m
1 stop
SFO11:10 pmSan Francisco
Sep 29
SFO6:35 amSan Francisco
6h 34m
1 stop
HLN2:09 pmHelena
$705
Find similar
United Airlines
Oct 16
HLN6:30 amHelena
11h 49m
1 stop
SFO5:19 pmSan Francisco
Oct 16
SFO11:00 pmSan Francisco
14h 09m
2 stops
HLN2:09 pmHelena
$761
Find similar

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 September 15, 2025.
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

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 10/18

6:18 pm-10:29 pm

1 stop5h 11m

San Francisco

Mon 10/27

11:40 am-5:36 pm

1 stop4h 56m

$256

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 10/18

1:00 pm-11:33 pm

2 stops11h 33m

San Francisco

Mon 10/27

6:00 am-12:20 pm

1 stop5h 20m

$304

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 10/18

1:00 pm-11:33 pm

2 stops11h 33m

San Francisco

Mon 10/27

6:15 am-12:20 pm

2 stops29h 05m

$315

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 3/7

12:50 pm-6:42 pm

1 stop6h 52m

San Francisco

Wed 3/11

5:45 am-12:27 pm

1 stop5h 42m

$349

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 3/7

12:50 pm-4:29 pm

1 stop4h 39m

San Francisco

Wed 3/11

5:45 am-12:27 pm

1 stop5h 42m

$374

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Mon 12/29

6:32 pm-9:33 am

1 stop16h 01m

San Francisco

Fri 1/2

10:13 am-5:55 pm

1 stop6h 42m

$453

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sun 12/28

6:32 pm-11:54 pm

1 stop6h 22m

San Francisco

Sat 1/3

5:42 pm-5:55 pm

1 stop23h 13m

$464

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 10/16

5:18 pm-8:43 am

2 stops16h 25m

San Francisco

Sun 10/19

10:40 pm-4:40 pm

2 stops17h 00m

$646

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 10/16

6:30 am-5:19 pm

1 stop11h 49m

San Francisco

Thu 10/16

11:00 pm-2:09 pm

2 stops14h 09m

$761

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 10/18

6:18 pm-11:54 am

3 stops18h 36m

San Francisco

Mon 10/27

7:00 am-5:36 pm

2 stops9h 36m

$838

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 day to depart on your flight to San Francisco?

The cheapest day to depart from Helena to San Francisco is on a Monday when prices can be found for as low as $327. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $679.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Helena to San Francisco flights are usually those with departure times at noon. Our users have found flights to San Francisco at noon for as low as $356. Flights in the morning are often more expensive with an average ticket price of $421.

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

Direct flights

None
There are no direct flights from Helena to San Francisco. There are no popular flight routes from Helena to San Francisco.
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  • How far is Helena to San Francisco by plane?

    The distance between Helena and San Francisco is about 805.5 mi. 4h 39m 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 $246Free CancellationRating
7.9
7,954 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
Calistoga
Bodega Bay
Roseville
Hayward
Big Sur
Santa Clara
Daly City
Fremont
Berkeley
Half Moon Bay
Walnut Creek
Vallejo
Redwood City
Salinas
South San Francisco
Fairfield

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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