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$136+ Cheap flights from Helena to San Francisco (HLN - SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SFO
oct. 29 — nov. 51
mié. 10/29
mié. 11/5
1 adult, Economy
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Cheap flight deals from Helena to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septiembre 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$273
(Delta)

One-way from

$136
(Alaska Airlines)

Popular in

July

Cheapest in

May

Average price

$264
Provider with most accurate pricing for Helena-San Francisco flight deals.
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Provider most trusted by Cheapflights users for Helena-San Francisco flights.
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From Helena to San Francisco
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One-way flight from Helena to San Francisco
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Highest demand for flights based on searches. 27% potential increase in price ($156 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Helena to San Francisco

Cheapest flights from Helena to San Francisco
Explore the most affordable flight options available from Helena to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 29, 2025.

This Delta deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/81:00 pmHLN - SFO
1 stop3h 59mDelta
mié. 11/126:00 amSFO - HLN
1 stop5h 26mDelta
Deal found 9/28$273
This Alaska Airlines deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/316:32 pmHLN - SFO
1 stop16h 01mAlaska Airlines
vie. 1/210:13 amSFO - HLN
1 stop6h 42mAlaska Airlines
Deal found 9/27$340
This Alaska Airlines deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/86:13 pmHLN - SFO
2 stops14h 21mAlaska Airlines
mié. 11/1211:40 amSFO - HLN
1 stop4h 56mAlaska Airlines
Deal found 9/28$343
This Alaska Airlines deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/316:32 pmHLN - SFO
1 stop16h 01mAlaska Airlines
sáb. 1/38:46 pmSFO - HLN
1 stop20h 09mAlaska Airlines
Deal found 9/27$367
This Alaska Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/166:18 pmHLN - SFO
1 stop5h 00mAlaska Airlines
lun. 10/206:20 pmSFO - HLN
1 stop22h 21mAlaska Airlines
Deal found 9/29$440
This Alaska Airlines deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/306:32 pmHLN - SFO
1 stop6h 22mAlaska Airlines
vie. 1/210:13 amSFO - HLN
1 stop6h 42mAlaska Airlines
Deal found 9/27$451
This Expedia deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/296:32 pmHLN - SFO
1 stop16h 01mAlaska Airlines
mar. 12/308:46 pmSFO - HLN
1 stop20h 09mAlaska Airlines
Deal found 9/27$474

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated septiembre 29, 2025.
Use the filters below to find and compare flights from Helena to San Francisco that are best for you.

Fly from

Helena

Fly to

San Francisco

Route

Depart

Return

Price

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

sáb. 11/8

1:00 pm-3:59 pm

1 stop3h 59m

San Francisco

mié. 11/12

6:00 am-12:26 pm

1 stop5h 26m

$273

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

mié. 12/31

6:32 pm-9:33 am

1 stop16h 01m

San Francisco

vie. 1/2

10:13 am-5:55 pm

1 stop6h 42m

$340

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

sáb. 11/8

6:13 pm-7:34 am

2 stops14h 21m

San Francisco

mié. 11/12

11:40 am-5:36 pm

1 stop4h 56m

$343

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

sáb. 3/7

4:10 pm-10:18 pm

1 stop7h 08m

San Francisco

mié. 3/11

9:10 am-3:43 pm

1 stop5h 33m

$348

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

mié. 12/31

6:32 pm-9:33 am

1 stop16h 01m

San Francisco

sáb. 1/3

8:46 pm-5:55 pm

1 stop20h 09m

$367

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

sáb. 3/7

12:50 pm-4:29 pm

1 stop4h 39m

San Francisco

mié. 3/11

5:45 am-12:27 pm

1 stop5h 42m

$384

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

mar. 10/28

6:13 pm-10:41 pm

1 stop5h 28m

$136

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

sáb. 11/8

1:00 pm-3:59 pm

1 stop3h 59m

$137

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

mié. 12/31

6:32 pm-9:33 am

1 stop16h 01m

$177

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

vie. 10/17

6:18 pm-10:29 pm

1 stop5h 11m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

Showing 1-10 of 14 results
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Compare providers for flights from Helena to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Helena to San Francisco in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Helena-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Helena-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Helena-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Helena-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Helena-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Helena to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Helena with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Helena to San Francisco

What is the cheapest month to book a flight from Helena to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Helena to San Francisco (average of $276). Flying from Helena to San Francisco in June is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated septiembre 29, 2025.
Peruse reviews from past customers who have flown with Delta from Helena to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,964 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,964 reviews
Delta
8.0
Very good
7,964 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Helena to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Helena to San Francisco?

    For as low as $273, Delta can have you in San Francisco from Helena in 3h 59m. There are 816 mi between Helena and San Francisco. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Helena to San Francisco round-trip?

    According to our current data, Delta ($246), offers the cheapest pricing from Helena to San Francisco. Delta is currently priced 39% below the average price you’ll pay for this route.

  • Can I find deals for flights from Helena to San Francisco that include hotel bookings?

    Yes. In addition to deals on Helena to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Helena to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to San Francisco.

  • Can I find deals for business class flights from Helena to San Francisco?

    Yes. Cheapflights offers flight deals from Helena to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Helena to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Helena to San Francisco (average of $276). Flying from Helena to San Francisco in June is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
Santa Cruz
Livermore
South San Francisco
Turlock
Antioch
Watsonville
Santa Clara
Manteca
Sunnyvale
Hollister
Vacaville
Foster City
Union City
Vallejo
Fairfield
Burlingame
Redwood City
San Mateo
San Leandro

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Top airline flying from Helena to San Francisco

Discover the top airline that operate flights from Helena to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$246Average$325FlexibilityNo cancel feeOn-timeN/A

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