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$158+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SFO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$519
(Delta)

One-way from

$158
(Alaska Airlines)

Popular in

March

Cheapest in

May
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. 7% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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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 June 12, 2025.

This Delta deal was found by Cheapflights users on 6/11. 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.
Thu 6/265:44 amHLN - SFO
1 stop4h 38mDelta
Mon 6/305:35 amSFO - HLN
1 stop5h 52mDelta
Deal found 6/11$519
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 6/265:39 pmHLN - SFO
1 stop6h 31mUnited Airlines
Mon 6/3011:03 pmSFO - HLN
2 stops13h 55mUnited Airlines
Deal found 6/11$661
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 6/254:09 pmHLN - SFO
2 stops25h 47mAlaska Airlines
Sun 6/296:00 amSFO - HLN
2 stops8h 31mAlaska Airlines
Deal found 6/10$778

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 June 12, 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

Thu 6/26

5:44 am-9:22 am

1 stop4h 38m

San Francisco

Mon 6/30

5:35 am-12:27 pm

1 stop5h 52m

$519

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Thu 6/26

5:39 pm-11:10 pm

1 stop6h 31m

San Francisco

Mon 6/30

11:03 pm-1:58 pm

2 stops13h 55m

$661

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Wed 6/25

4:09 pm-4:56 pm

2 stops25h 47m

San Francisco

Sun 6/29

6:00 am-3:31 pm

2 stops8h 31m

$778

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 9/2

4:02 pm-8:20 pm

1 stop5h 18m

$158

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 9/2

5:50 am-9:04 am

1 stop4h 14m

$190

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sun 7/20

5:39 pm-11:10 pm

1 stop6h 31m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 $364). 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.

What is the cheapest time of day to fly from HLN to SFO?

Find hourly flight availability from Helena to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

It’s typically best to fly out from Helena to San Francisco at noon. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 June 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines flying from Helena to San Francisco round-trip?

    According to our current data, Delta ($519), United Airlines ($661), and Alaska Airlines ($778) offers the cheapest pricing from Helena to San Francisco.

  • What are the cheapest airlines to fly from Helena to San Francisco one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $158. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Helena to San Francisco for a low price.

  • 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 $364). 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 Helena?

Book flights to Helena if you plan to visit one of these locations
Roseville
Mountain View
South San Francisco
Livermore
Turlock
Santa Cruz
Manteca
Fairfield
Watsonville
Antioch
Hollister
Milpitas
Newark
Hayward
Alameda
Sunnyvale
Daly City
Union City
Campbell
Capitola

Browse thousands of different options on Cheapflights for your next trip

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$246Average$349FlexibilityNo cancel feeOn-timeN/A

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