SFO - HLN

$280 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 11/26. 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 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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Everything you should know

Cheapest round-trip
$305
Hawaiian Airlines
Fri 12/12Fri 12/19
SFO - HLN • 1 stop
Cheapest one-way
$280
Delta
Wed 11/26
SFO - HLN • 1 stop
Top airlines
Hawaiian Airlines
Cheapest • from $305 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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Flight Deals
Booking Insights
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

Fri, Dec 12 - Fri, Dec 19
Hawaiian Airlines Logo
9:00 am - 5:51 pmSFO-HLN
7h 51m1 stop
Hawaiian Airlines Logo
6:32 pm - 10:54 pmHLN-SFO
5h 22m1 stop
$305Hawaiian Airlines
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Sat, Apr 25 - Wed, Apr 29
Alaska Airlines Logo
8:00 am - 3:38 pmSFO-HLN
6h 38m1 stop
Alaska Airlines Logo
4:10 pm - 8:10 pmHLN-SFO
5h 00m1 stop
$348Alaska Airlines
Find Deal
Thu, Nov 27 - Fri, Dec 5
Alaska Airlines Logo
2:30 pm - 6:52 pmSFO-HLN
27h 22m1 stop
Alaska Airlines Logo
6:28 pm - 10:45 pmHLN-SFO
5h 17m1 stop
$392Alaska Airlines
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Thu, Apr 23 - Sun, Apr 26
Delta Logo
6:00 am - 12:23 pmSFO-HLN
5h 23m1 stop
Delta Logo
5:45 am - 9:09 amHLN-SFO
4h 24m1 stop
$394Delta
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Sat, Apr 25 - Wed, Apr 29
Alaska Airlines Logo
9:10 am - 3:38 pmSFO-HLN
5h 28m1 stop
Alaska Airlines Logo
4:10 pm - 8:56 amHLN-SFO
17h 46m2 stops
$397Alaska Airlines
Find Deal
Fri, Dec 12 - Fri, Dec 19
Alaska Airlines Logo
8:00 am - 5:51 pmSFO-HLN
8h 51m2 stops
Alaska Airlines Logo
6:32 pm - 9:36 pmHLN-SFO
28h 04m2 stops
$423Alaska Airlines
Find Deal
Sun, Nov 16 - Wed, Nov 19
Alaska Airlines Logo
11:40 am - 5:36 pmSFO-HLN
4h 56m1 stop
Alaska Airlines Logo
6:13 pm - 10:44 amHLN-SFO
17h 31m1 stop
$430Alaska Airlines
Find Deal
Thu, Apr 23 - Sun, Apr 26
Alaska Airlines Logo
9:10 am - 3:38 pmSFO-HLN
5h 28m1 stop
Alaska Airlines Logo
4:10 pm - 8:52 amHLN-SFO
17h 42m2 stops
$441Alaska Airlines
Find Deal
Sat, Apr 25 - Wed, Apr 29
Delta Logo
1:59 pm - 10:34 pmSFO-HLN
7h 35m2 stops
Delta Logo
12:50 pm - 10:31 pmHLN-SFO
10h 41m2 stops
$455Delta
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Wed, Nov 26 - Sun, Nov 30
Delta Logo
5:00 pm - 10:30 pmSFO-HLN
4h 30m1 stop
Delta Logo
5:30 am - 8:56 amHLN-SFO
4h 26m1 stop
$849Delta
Find Deal
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$280
Best time to beat the crowds with an average 48% drop in price.
Most popular time to fly and prices are also 15% 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 $280 for a one-way ticket and $305 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?

    SkyTeam, and oneworld 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 $420 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 11220 reviews
7.0Entertainment
7.1Food
8.1Boarding
8.5Crew
7.8Comfort
Airline reviews

Flight was delayed 14 hours! We missed an entire day of our vacation and had to pay for hotel that we didn’t use

2.0 MediocreAnonymous, Oct 2025SFO - OGG
Read more Alaska Airlines reviews

Flight was delayed 14 hours! We missed an entire day of our vacation and had to pay for hotel that we didn’t use

Could not check in online. Called airline twice, thinking Hawaiian Airlines could check me in during phone call. NO. In 2nd phone call, Customer Service explained that due to “transition period” of Hawaiian Airlines/Alaska Airlines merger, I could only check in at the airport. In addition, flight to Kahului was late at arrival gate; I made connection to Lihue but my bag did not, so I had to return to Lihue airport a couple hours after my arrival to retrieve the bag.

I still in San Francisco😡the flight has delay and lm not sure l can back to Seattle or not😡lm here from 7.30pm and still waiting😡 l never will use of Kayak.

On time boarding, take off and landing. Will fly again with Alaska Airlines.

Flight was smooth, pleasant passengers and crew. Enjoyed the experience

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.

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.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

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.

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

Information on your arrival and departure airports

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