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$219+ 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 6/18. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SFO
Jan 29 — Feb 51
Thu 1/29
Thu 2/5
1 adult, Economy
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Cheap flight deals from Helena to San Francisco

Best flights from Helena to San Francisco
Discover carefully curated flight deals from Helena to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 30, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/28. 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.
Sat 1/246:48 pmHLN - SFO
1 stop5h 15mAlaska Airlines
Sat 1/317:00 amSFO - HLN
1 stop10h 11mAlaska Airlines
Deal found 12/28$254
This Alaska Airlines deal was found by Cheapflights users on 12/29. 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.
Wed 1/286:48 pmHLN - SFO
1 stop5h 15mAlaska Airlines
Sat 1/3112:00 pmSFO - HLN
1 stop5h 11mAlaska Airlines
Deal found 12/29$254
This United Airlines deal was found by Cheapflights users on 12/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/126:15 amHLN - SFO
1 stop8h 14mUnited Airlines
Fri 1/1610:45 amSFO - HLN
2 stops25h 56mUnited Airlines
Deal found 12/28$568
This Alaska Airlines deal was found by Cheapflights users on 12/29. 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.
Tue 1/136:48 pmHLN - SFO
1 stop5h 15mAlaska Airlines
Sat 1/177:00 amSFO - HLN
1 stop10h 11mAlaska Airlines
Deal found 12/29$558
This Alaska Airlines deal was found by Cheapflights users on 12/27. 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.
Sat 1/106:48 pmHLN - SFO
1 stop5h 15mAlaska Airlines
Wed 1/1412:00 pmSFO - HLN
1 stop5h 11mAlaska Airlines
Deal found 12/27$558
This Alaska Airlines deal was found by Cheapflights users on 12/28. 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.
Mon 1/126:48 pmHLN - SFO
1 stop5h 15mAlaska Airlines
Fri 1/1612:00 pmSFO - HLN
1 stop5h 11mAlaska Airlines
Deal found 12/28$558

Find 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 December 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$254
(Alaska Airlines)

One-way from

$219
(Delta)

Popular in

July

Cheapest in

May

Average price

$371
Provider with most accurate pricing for Helena-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Helena-San Francisco flights.
Search Deals
From Helena to San Francisco
Search Deals
One-way flight from Helena to San Francisco
Search Deals
Highest demand for flights based on searches. 31% potential increase in price ($175 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 30, 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

Sat 1/24

6:48 pm-11:03 pm

1 stop5h 15m

San Francisco

Sat 1/31

7:00 am-6:11 pm

1 stop10h 11m

$254

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Wed 1/28

6:48 pm-11:03 pm

1 stop5h 15m

San Francisco

Sat 1/31

12:00 pm-6:11 pm

1 stop5h 11m

$254

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 1/13

6:48 pm-11:03 pm

1 stop5h 15m

San Francisco

Sat 1/17

7:00 am-6:11 pm

1 stop10h 11m

$558

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 1/10

6:48 pm-11:03 pm

1 stop5h 15m

San Francisco

Wed 1/14

12:00 pm-6:11 pm

1 stop5h 11m

$558

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Mon 1/12

6:48 pm-11:03 pm

1 stop5h 15m

San Francisco

Fri 1/16

12:00 pm-6:11 pm

1 stop5h 11m

$558

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Mon 1/12

6:15 am-1:29 pm

1 stop8h 14m

San Francisco

Fri 1/16

10:45 am-1:41 pm

2 stops25h 56m

$568

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 6/18

12:50 pm-6:35 pm

1 stop6h 45m

$219

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 6/18

4:59 pm-12:30 pm

2 stops20h 31m

$273

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/29

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Helena-San Francisco flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, July is the cheapest month in which you can book a flight from Helena to San Francisco (average of $41). Flying from Helena to San Francisco in May is currently the most expensive (average of $219). 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 December 30, 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
7.9
Good
8,017 reviews

Entertainment

7.9

Overall

7.9

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

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
7.9
Good
8,017 reviews
Delta
7.9
Good
8,017 reviews

Entertainment

7.9

Overall

7.9

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

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 $254, Alaska Airlines can have you in San Francisco from Helena in 5h 15m. There are 816 mi between Helena and San Francisco.

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

    According to our current data, Delta ($238), offers the cheapest pricing from Helena to San Francisco. Delta is currently priced 38% 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, July is the cheapest month in which you can book a flight from Helena to San Francisco (average of $41). Flying from Helena to San Francisco in May is currently the most expensive (average of $219). 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
South San Francisco
Santa Cruz
Livermore
Santa Clara
Watsonville
Redwood City
Sunnyvale
San Bruno
Daly City
Manteca
Turlock
San Carlos
Vallejo
Hollister
San Ramon
Foster City
Union City
Davis
Emeryville

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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 December 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$238Average$264FlexibilityNo cancel feeOn-timeN/A

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