HLN - SFO

$168 Find Cheap Flights from Helena to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Helena to San Francisco departing on 2/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helena to San Francisco, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helena to San Francisco, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$250
Alaska Airlines
Wed 2/25Sat 2/28
HLN - SFO • 1 stop
Cheapest one-way
$168
Alaska Airlines
Wed 2/18
HLN - SFO • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $250 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Helena to San Francisco (HLN-SFO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Helena to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Helena to San Francisco

Wed, Feb 25 - Sat, Feb 28
Alaska Airlines Logo
4:36 pm - 9:55 pm
HLN
-
SFO
6h 19m
1 stop
Alaska Airlines Logo
6:30 am - 3:59 pm
SFO
-
HLN
8h 29m
1 stop
$250Alaska Airlines
Wed, Feb 25 - Sat, Feb 28
Alaska Airlines Logo
4:36 pm - 10:56 pm
HLN
-
SFO
7h 20m
1 stop
Alaska Airlines Logo
7:28 pm - 3:59 pm
SFO
-
HLN
19h 31m
1 stop
$260Alaska Airlines
Wed, Feb 25 - Sat, Feb 28
Alaska Airlines Logo
4:36 pm - 10:56 pm
HLN
-
SFO
7h 20m
1 stop
Alaska Airlines Logo
6:30 am - 3:59 pm
SFO
-
HLN
8h 29m
1 stop
$270Alaska Airlines
Wed, Feb 25 - Sat, Feb 28
Alaska Airlines Logo
4:36 pm - 8:46 am
HLN
-
SFO
17h 10m
2 stops
Alaska Airlines Logo
6:30 am - 3:59 pm
SFO
-
HLN
8h 29m
1 stop
$288Alaska Airlines
Wed, Feb 25 - Sat, Feb 28
Alaska Airlines Logo
4:36 pm - 12:15 pm
HLN
-
SFO
20h 39m
2 stops
Alaska Airlines Logo
6:30 am - 3:59 pm
SFO
-
HLN
8h 29m
1 stop
$308Alaska Airlines
Mon, Feb 23 - Thu, Feb 26
Alaska Airlines Logo
4:36 pm - 9:55 pm
HLN
-
SFO
6h 19m
1 stop
Alaska Airlines Logo
8:42 am - 3:59 pm
SFO
-
HLN
6h 17m
1 stop
$313Alaska Airlines
Wed, Feb 25 - Sat, Feb 28
Alaska Airlines Logo
4:36 pm - 8:46 am
HLN
-
SFO
17h 10m
2 stops
Alaska Airlines Logo
6:00 am - 3:59 pm
SFO
-
HLN
8h 59m
2 stops
$334Alaska Airlines
Mon, May 4 - Thu, May 7
Alaska Airlines Logo
6:22 pm - 11:30 am
HLN
-
SFO
18h 08m
2 stops
Alaska Airlines Logo
9:10 pm - 5:45 pm
SFO
-
HLN
19h 35m
1 stop
$346Alaska Airlines
Mon, May 4 - Thu, May 7
Alaska Airlines Logo
6:22 pm - 11:44 pm
HLN
-
SFO
6h 22m
1 stop
Alaska Airlines Logo
9:00 am - 5:45 pm
SFO
-
HLN
7h 45m
1 stop
$347Alaska Airlines
Mon, May 4 - Thu, May 7
Alaska Airlines Logo
6:22 pm - 11:30 am
HLN
-
SFO
18h 08m
2 stops
Alaska Airlines Logo
9:10 pm - 5:45 pm
SFO
-
HLN
19h 35m
1 stop
$352Alaska Airlines
Booking Insights

KAYAK's insights & trends for Helena to San Francisco flights

Get data-powered insights and trends into flights from Helena to San Francisco to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Helena to San Francisco?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Helena to San Francisco were found on Alaska Airlines ($250) and United Airlines ($559).

Good to know

Low seasonDecember
Cheapest flight$168
Best time to beat the crowds with an average 56% drop in price.
Most popular time to fly and prices are also 33% lower on average.
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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Helena to San Francisco

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

    In the last 3 days, the lowest price for a flight from Helena to San Francisco was $168 for a one-way ticket and $250 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Helena to San Francisco?

    Helena and San Francisco are both served by 1 main airport. You will leave Helena from Helena and will be arriving at San Francisco.

  • Which aircraft models fly most regularly from Helena to San Francisco?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Helena to San Francisco?

    SkyTeam is the only airline alliance operating flights between Helena and San Francisco.

  • How does KAYAK find such low prices on flights from Helena to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Helena to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Helena to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Helena is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Helena to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Helena with another airline. Booking your flights between Helena and SFO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Helena to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Helena up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Helena to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from Helena to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Helena to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8128 reviews
7.9Comfort
8.5Crew
7.8Entertainment
7.2Food
8.1Boarding
Airline reviews

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

4.0 OkayLauren, Jan 2026
ATL - SFO
Read more Delta reviews

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

Food was surprisingly good but the WiFi was not great

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

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

Information on your arrival and departure airports