HLN - SFO

$284 Find Cheap Flights from Helena to San Francisco - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$333
Typical prices: $258-$533
Alaska Airlines
Tue 1/30Fri 2/2
HLN - SFO • 1 stop
Cheapest one-way
$284
Typical prices: $279-$774
Delta
Mon 11/19
HLN - SFO • 2 stops
When to travel
January
Cheapest • 39% price drop
January
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Seattle/Tacoma Intl (SEA)
Cheapest • Avg $287 (round-trip)
Salt Lake City (SLC)
Shortest trip • 5h 01m (one-way)
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Cheap Flights from Helena to San Francisco (HLN-SFO)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Helena to San Francisco

Sat, Jan 30 - Tue, Feb 2
Alaska Airlines Logo
5:00 pm - 10:56 pmHLN  Helena-SFO San Francisco
6h 56m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
5:39 pm - 4:23 pmSFO  San Francisco-HLN Helena
21h 44m1 stop Seattle/Tacoma Intl
$333Alaska Airlines
Sat, Jan 30 - Tue, Feb 2
Alaska Airlines Logo
5:00 pm - 9:40 pmHLN  Helena-SFO San Francisco
5h 40m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
11:46 am - 4:23 pmSFO  San Francisco-HLN Helena
27h 37m2 stops San Diego Seattle/Tacoma Intl
$381Alaska Airlines
Sat, Jan 30 - Tue, Feb 2
Alaska Airlines Logo
5:00 pm - 9:40 pmHLN  Helena-SFO San Francisco
5h 40m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
11:46 am - 4:23 pmSFO  San Francisco-HLN Helena
27h 37m2 stops San Diego Seattle/Tacoma Intl
$391Alaska Airlines
Thu, Nov 26 - Thu, Dec 3
Delta Logo
9:59 am - 8:08 pmHLN  Helena-SFO San Francisco
11h 09m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
6:00 am - 12:30 pmSFO  San Francisco-HLN Helena
5h 30m1 stop Salt Lake City
$556Delta
Thu, Nov 26 - Thu, Dec 3
Delta Logo
9:59 am - 8:08 pmHLN  Helena-SFO San Francisco
11h 09m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
11:50 am - 10:32 pmSFO  San Francisco-HLN Helena
9h 42m2 stops Los Angeles Salt Lake City
$561Delta
Fri, Nov 13 - Tue, Nov 17
Delta Logo
7:00 am - 3:35 pmHLN  Helena-SFO San Francisco
9h 35m2 stops Salt Lake City Los Angeles
Delta Logo
5:50 am - 12:27 pmSFO  San Francisco-HLN Helena
5h 37m1 stop Salt Lake City
$770Delta
Fri, Nov 13 - Tue, Nov 17
Delta Logo
1:07 pm - 8:17 pmHLN  Helena-SFO San Francisco
8h 10m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
2:47 pm - 10:26 pmSFO  San Francisco-HLN Helena
6h 39m2 stops Los Angeles Salt Lake City
$775Delta
Booking Insights

Price, demand and travel trends for Helena to San Francisco flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Helena to San Francisco?

Round-trip flights from Helena to San Francisco typically range from $258 to $533. The lowest price found in the past 5 days was $333, on Alaska Airlines.

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Key details for Helena to San Francisco flights

Low season

June

Cheapest flight

$284
Beat the crowds with an average 89% drop in travelers.
The most popular month to fly with an average 56% increase in travelers.
One-way flight from Helena to San Francisco

When to book flights from Helena to San Francisco

Are your dates flexible? Find out the best times to travel from Helena to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Helena to San Francisco flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Helena to San Francisco?

    Only Economy Class is available on flights from Helena to San Francisco.

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

    There are currently no nonstop flights available from Helena to San Francisco. Flights with 1 layover take between 5h 01m and 6h 49m in total, depending on the connection.

  • Do I need a passport to fly from Helena to San Francisco?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Helena to San Francisco flight?

    Round-trip flights from Helena to San Francisco range from $258 to $533, with an average of $388 over the past 12 months. Anything below $258 counts as a good deal.

  • Have flight prices from Helena to San Francisco changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $333 to $1,214. That means the highest observed fare was about 4x higher than the lowest one.

  • How are flight prices from Helena to San Francisco looking right now?

    One-way fares from Helena to San Francisco are currently lower than usual. Average one-way flight prices are about $462, which is 41% below the typical average for this route.

  • What car rental options are available at San Francisco Airport (SFO)?

    San Francisco Airport (SFO) hosts 5 major car rental companies, with daily rates averaging $63 for economy cars. Top options include:

    • Europcar
    • Thrifty
    • Dollar
    • Hertz
    • Fox

  • Which airports can I use when flying from Helena to San Francisco?

    Flights from Helena to San Francisco usually depart from Helena (HLN) and arrive at San Francisco (SFO).

  • Which airports do connecting flights from Helena to San Francisco pass through?

    One-stop flights from Helena to San Francisco most commonly connect through:

    • Salt Lake City (SLC) - 65% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 31% of one-stop connections
    • Denver Intl (DEN) - 4% of one-stop connections

  • Can I save money by using flexible dates for flights from Helena to San Francisco?

    Yes. Flexible dates can save you up to 70% on flights from Helena to San Francisco. Thursday is the cheapest departure day at $278 round-trip on average, while Monday is the most expensive at $908, a difference of $630.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Helena to San Francisco?

    Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 5h 01m, compared with 5h 59m via Denver Intl (DEN) and 6h 49m via Seattle/Tacoma Intl (SEA).

  • What is the time difference between Helena and San Francisco?

    San Francisco is 1 hour behind Helena (Pacific Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in San Francisco?

    Some of the most popular sights in San Francisco are Fisherman's Wharf, Union Square and Moscone Center. These are among the most viewed places in San Francisco on KAYAK.

Your guide to booking Helena to San Francisco flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure and avoid flying on Monday. On this route, Thursday flights average $278, about $630 less than Monday fares (69% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Helena to San Francisco trip for January. Fares historically average $238 round-trip in that month - typically $670 less than the most expensive month, which is November (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to San Francisco Airport.

    • Grand Hyatt At Sfo

More options for your flight from Helena to San Francisco

Complete your trip to San Francisco with a hotel stay or car rental

Car rentals in San Francisco
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