HLN - SFO

$271 Find Cheap Flights from Helena to San Francisco

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Helena to San Francisco departing on 4/2. 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
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Everything you should know

Cheapest round-trip
$271
Delta
Thu 4/2Wed 4/8
HLN - SFO • 1 stop
Cheapest one-way
$390
Alaska Airlines
Thu 5/21
HLN - SFO • 1 stop
Top airlines
Cheapest • from $271 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Helena and San Francisco. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $349 (round-trip)
Shortest trip • 5h 18m (one-way)
Insights
Insights
Insights
Insights
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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

Thu, Apr 2 - Wed, Apr 8
Delta Logo
5:30 am - 8:56 am
HLN
-
SFO
4h 26m
1 stop
Delta Logo
5:40 am - 12:21 pm
SFO
-
HLN
5h 41m
1 stop
$271Delta
Thu, Apr 30 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 11:44 pm
HLN
-
SFO
6h 22m
1 stop
Alaska Airlines Logo
10:25 am - 5:45 pm
SFO
-
HLN
6h 20m
1 stop
$295Alaska Airlines
Thu, May 7 - Tue, May 12
Alaska Airlines Logo
6:22 pm - 11:44 pm
HLN
-
SFO
6h 22m
1 stop
Alaska Airlines Logo
10:25 am - 5:45 pm
SFO
-
HLN
6h 20m
1 stop
$300Alaska Airlines
Thu, Apr 2 - Tue, Apr 7
Delta Logo
5:30 am - 8:56 am
HLN
-
SFO
4h 26m
1 stop
Delta Logo
5:40 am - 12:21 pm
SFO
-
HLN
5h 41m
1 stop
$310Delta
Thu, Apr 30 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 11:44 pm
HLN
-
SFO
6h 22m
1 stop
Alaska Airlines Logo
5:57 pm - 5:45 pm
SFO
-
HLN
22h 48m
2 stops
$329Alaska Airlines
Sat, May 9 - Fri, May 15
Alaska Airlines Logo
6:22 pm - 8:46 am
HLN
-
SFO
15h 24m
2 stops
Alaska Airlines Logo
8:52 pm - 4:06 pm
SFO
-
HLN
18h 14m
1 stop
$336Alaska Airlines
Fri, May 8 - Wed, May 13
Delta Logo
5:45 am - 8:53 am
HLN
-
SFO
4h 08m
1 stop
Delta Logo
5:40 am - 12:23 pm
SFO
-
HLN
5h 43m
1 stop
$350Delta
Thu, May 7 - Tue, May 12
Alaska Airlines Logo
6:22 pm - 11:44 pm
HLN
-
SFO
6h 22m
1 stop
Alaska Airlines Logo
7:15 am - 5:45 pm
SFO
-
HLN
9h 30m
2 stops
$368Alaska Airlines
Thu, Apr 9 - Sat, Apr 11
Alaska Airlines Logo
6:22 pm - 8:40 am
HLN
-
SFO
15h 18m
2 stops
Alaska Airlines Logo
7:59 pm - 5:45 pm
SFO
-
HLN
20h 46m
2 stops
$393Alaska Airlines
Thu, Apr 30 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 9:58 am
HLN
-
SFO
16h 36m
2 stops
Alaska Airlines Logo
7:40 pm - 5:45 pm
SFO
-
HLN
21h 05m
2 stops
$396Alaska 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 Delta ($271) and Alaska Airlines ($295).

Good to know

Low seasonDecember
Cheapest flight$271
Best time to beat the crowds with an average 56% drop in price.
Most popular time to fly with an average 29% increase in price.
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 $390 for a one-way ticket and $271 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?

    oneworld 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 airlines 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
Alaska AirlinesOverall score based on 12058 reviews
7.0Entertainment
8.5Crew
8.1Boarding
7.0Food
7.8Comfort
Airline reviews

i canceled my return flight package with Alaska Airlines. Customer Service was excellent and assisted me to cancelled both of our reservations and returned the payment in full. that is excellent service and understanding and empathy of the customers' needs. i like Alaska Airlines and recommend AS to everyone.

10.0 ExcellentBoris, Mar 2026
SEA - SFO
Read more Alaska Airlines reviews

i canceled my return flight package with Alaska Airlines. Customer Service was excellent and assisted me to cancelled both of our reservations and returned the payment in full. that is excellent service and understanding and empathy of the customers' needs. i like Alaska Airlines and recommend AS to everyone.

Representatives both at the gate and on the plane have zero interest in helping you! It’s really unfortunate…

I was in economy class and there was plenty of leg room. New interior which was nice and they served various kinds of chips and sodas on the red eye. You couldn't get a bottle of water but they instead served it in a medium paper cup from a reinforced structured paper container, environmental friendly.

Great experience, staff and crew were very professional, friendly and helpful!

I fell asleep and missed my flight and they rescheduled me no problem. Staff was professional and the plane was clean. I was very happy with my experience.

Alaska used to be a top notch airline. With it's growth it is now in line with the big airlines. Not bad, not great.

Overall it was fine, however one of my two checked bags did not arrive and I was told it was left in Palm Springs. I don't understand how one of the two bags made it through fine but the other got lost .

The seats are very small. I’m 5’ 3”, so don’t think I should notice. The food selection was non existent and very disappointing. 5 hour flight plus TSA, etc. I would have appreciated a small salad, crudités. Something fresher not just chips.

Was notified the departure would be late. Later on it was suddenly on time. Traffic by LAX was horrendous, and I missed the flight.

you sent me to some shitty "Airfaireassist" thing that did a bait and switch on the faire. Won't be using Kayak ever again

Left a few minutes early. Got in 15 minutes early. Very attentive service on board. Very organized boarding.

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Delta continues to set the benchmark for traveler-friendly service with minimal disruption and clear communication within the mainland US (coast to coast). I am consistently pleased to be a Delta customer, and this experience once again met my expectations. There was a brief delay departing from MIA due to a technical issue that required the aircraft to return to the gate. However, the situation was handled professionally and transparently. Fortunately, my planned layover allowed ample buffer time, so the adjustment caused no stress. Overall, another smooth and reassuring experience.

Awful - both legs. The check in was awful, getting on the plane required walking down a spiral staircase (dangerous), then taking a bus about 5 miles out from the terminal. The seat was broken (I was in business), there was no internet during the flight (both legs). The aircraft was very old. I saw rust in some place, tape holding things up in the bathroom. This was an unacceptable experience for such a long haul flight.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

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.

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

Information on your arrival and departure airports