SFO - HLN

$136 Find Cheap Flights from San Francisco to Helena

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Helena departing on 1/29. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Helena, 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 San Francisco to Helena, as well as popular online travel agencies
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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Helena 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 San Francisco to Helena

Wed, Mar 4 - Fri, Mar 13
Delta Logo
5:45 am - 12:27 pmSFO-HLN
5h 42m1 stop
Delta Logo
12:50 pm - 6:42 pmHLN-SFO
6h 52m1 stop
$311Delta
Find Deal
Wed, Mar 4 - Thu, Mar 12
Delta Logo
10:31 am - 10:38 pmSFO-HLN
11h 07m2 stops
Delta Logo
12:50 pm - 6:42 pmHLN-SFO
6h 52m1 stop
$321Delta
Find Deal
Wed, Mar 4 - Sat, Mar 14
Delta Logo
5:45 am - 12:27 pmSFO-HLN
5h 42m1 stop
Delta Logo
12:50 pm - 4:29 pmHLN-SFO
4h 39m1 stop
$336Delta
Find Deal
Wed, Mar 4 - Sat, Mar 14
Delta Logo
6:05 am - 10:38 pmSFO-HLN
15h 33m2 stops
Delta Logo
5:35 am - 9:22 amHLN-SFO
4h 47m1 stop
$346Delta
Find Deal
Sat, Mar 7 - Thu, Mar 12
Delta Logo
5:45 am - 12:27 pmSFO-HLN
5h 42m1 stop
Delta Logo
12:50 pm - 6:42 pmHLN-SFO
6h 52m1 stop
$349Delta
Find Deal
Tue, Sep 30 - Tue, Oct 7
Hawaiian Airlines Logo
8:00 am - 3:21 pmSFO-HLN
6h 21m1 stop
Hawaiian Airlines Logo
6:18 pm - 10:29 pmHLN-SFO
5h 11m1 stop
$405Hawaiian Airlines
Find Deal
Wed, Mar 4 - Sun, Mar 15
Alaska Airlines Logo
9:10 am - 3:43 pmSFO-HLN
5h 33m1 stop
Alaska Airlines Logo
4:10 pm - 10:15 amHLN-SFO
19h 05m1 stop
$443Alaska Airlines
Find Deal
Wed, Mar 4 - Sun, Mar 15
Alaska Airlines Logo
8:00 am - 3:43 pmSFO-HLN
6h 43m2 stops
Alaska Airlines Logo
4:10 pm - 9:11 amHLN-SFO
18h 01m1 stop
$455Alaska Airlines
Find Deal
Wed, Oct 1 - Sun, Oct 5
United Airlines Logo
11:03 am - 2:09 pmSFO-HLN
26h 06m2 stops
United Airlines Logo
5:18 pm - 9:42 amHLN-SFO
17h 24m1 stop
$616United Airlines
Find Deal
Sat, Sep 27 - Sat, Oct 4
United Airlines Logo
8:52 pm - 4:40 pmSFO-HLN
18h 48m1 stop
United Airlines Logo
5:18 pm - 10:57 pmHLN-SFO
6h 39m1 stop
$644United Airlines
Find Deal

Everything you should know

Top airlines
Delta
Cheapest • from $311 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$311
Delta
Wed 3/4Fri 3/13
SFO - HLN • 1 stop
Cheapest one-way
$136
Alaska Airlines
Thu 1/29
SFO - HLN • 1 stop
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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 Helena!
Booking Insights

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

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

What’s the cheapest day of the week to fly from San Francisco to Helena?

The average price of all round-trip flights from San Francisco to Helena clicked on KAYAK for each day over the last 12 months.

When flying from San Francisco to Helena, you should consider leaving on a Monday and avoid Sundays if you are looking for the best rates. For your return to San Francisco, you’ll find the best rates on Mondays and the most expensive ones on Sundays.

Good to know

Low seasonOctober
Cheapest flight$136
Best time to beat the crowds with an average 52% drop in price.
Most popular time to fly and prices are also 23% lower on average.
Flight from San Francisco to Helena

When to book flights from San Francisco to Helena

Are your dates flexible? Find out the best times to travel from San Francisco to Helena 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 San Francisco to Helena

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

    In the last 3 days, the lowest price for a flight from San Francisco to Helena was $136 for a one-way ticket and $311 for a round-trip.

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

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

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

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

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

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between San Francisco and Helena, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from San Francisco to Helena, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from San Francisco to Helena are Alaska Airlines and Delta. With an average price for the route of $511 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $408 and an overall rating of 7.9.

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

    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 San Francisco to Helena.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Helena from San Francisco 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 San Francisco to Helena?

    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 Helena with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and HLN 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 San Francisco to Helena?

    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 Helena from San Francisco 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 San Francisco to Helena

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Helena. 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 San Francisco to Helena? 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.1Entertainment
7.8Comfort
8.5Crew
8.1Boarding
7.1Food
Airline reviews

Flight attendant was awful, I felt second hand embarrassment with every one of her interactions with people onboard. She was so incredibly rude every chance she got

2.0 MediocreAnonymous, Sep 2025SFO - PAE
Read more Alaska Airlines reviews

Flight attendant was awful, I felt second hand embarrassment with every one of her interactions with people onboard. She was so incredibly rude every chance she got

Great flight - efficient and cheerful team on board, at SFO gate. Also, PAE (Paine Field, Everett, WA) is a great little airport to fly out or in to!

I was sitting towards back of plane and the flight attendants I thought spoke unusually loud for an evening flight. They chatted and chatted all night long and it seemed odd to me that they didn’t try to lower their voices. It is annoying as a passenger to hear all their conversations.

Had to pay $8 for internet wasnt cool, no tv’s, had to use phone to watch movies, no food choices seemed available unless u ordered in advance maybe I'm wrong about that but seemed that way, no snacks were served. Seemed a very bare bones flight. But it was on time and safe so that was good

We were singled out, greeted and helped with check-in at the busy airport. They offered to take our bags there and gave no fuss when we said they were carry-on. With United just last week I had to put up a fight just to get onto the flight with my one authorized carry-on.

boarding was late worst was going back LAX to SFO delayed not once ? but TWICE😡I was at the airport practically almost 5 hours of previous time , very inconvenient! i would have spend longer time with family , I was wanting to avoid TSA line? but it just got me to spend unwanted time @ d airport

Plane boarded and left on time or very close to the stated departure. Arrived on time. Staff was subdued. Could not hear the flight attendant too well. No announcement from the pilot which is always nice. Biggest complaint absolutely no little snacks! But the important thing is we left and arrived on time and we survived.

Crew was not happy to be there and neither was I 😭 well at least the lady that helped me.. I was stuck in the middle seat between two men. Totally my fault since I didn’t pay a fee to select my seat though. I recommend paying the fee even if you’re in a budget. It’s better than being placed aaaaallllllll the way in the back next to the smelly bathrooms. The seats didn’t recline either!! It was a red eye flight so I got no sleep whatsoever. Ordered a coffee and it tasted like…. Let’s just say it was horrible. I had to to return it to the same crew lady and she looked at me like this girl…. Sorry but I was not going to drink that- please take it back!! Oh and lastly, my luggage was completely broken and damaged. All wheels were missing by the time my luggage came around in the luggage cart. Lmao. Overall poor experience to say the least. Tickets were cheap though😂😂😂

Delayed flight both ways. Then, on the return flight, we were stuck on the tarmac for at least 30+ minutes. Idk what happened, but this was a bad experience.

Great flight, no bumps to speak of, pleasant crew, good inflight entertainment choices

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

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

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