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401 € Cheap Flights from San Francisco International to Helena

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      Travellers and cabin class, 1 Adult, Economy

      Compare San Francisco International to Helena flight deals

      Find the cheapest month or even day of the year to fly to Helena

      Book the best Helena fare with no extra fees

      Flight deals from San Francisco International to Helena

      Looking for a cheap last-minute deal or the best return flight from San Francisco International Airport to Helena Airport? If you want to travel next month, return fares start from 429 €. Find the lowest prices on one-way and return tickets right here.
      Helena.401 € per passenger.Departing Tue, 1 Jun, returning Wed, 9 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Tue, 1 Jun, arriving in Helena.Inbound indirect flight with Delta, departs from Helena on Wed, 9 Jun, arriving in San Francisco International.Price includes taxes and charges.From 401 €, select.
      Helena.422 € per passenger.Departing Fri, 2 Oct, returning Mon, 5 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Fri, 2 Oct, arriving in Helena.Inbound indirect flight with Delta, departs from Helena on Mon, 5 Oct, arriving in San Francisco International.Price includes taxes and charges.From 422 €, select.
      Helena.429 € per passenger.Departing Thu, 10 Sep, returning Wed, 16 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Thu, 10 Sep, arriving in Helena.Inbound indirect flight with Delta, departs from Helena on Wed, 16 Sep, arriving in San Francisco International.Price includes taxes and charges.From 429 €, select.
      Helena.432 € per passenger.Departing Mon, 5 Jul, returning Thu, 8 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Mon, 5 Jul, arriving in Helena.Inbound indirect flight with Delta, departs from Helena on Thu, 8 Jul, arriving in San Francisco International.Price includes taxes and charges.From 432 €, select.
      Helena.589 € per passenger.Departing Thu, 24 Sep, returning Thu, 1 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Thu, 24 Sep, arriving in Helena.Inbound indirect flight with Delta, departs from Helena on Thu, 1 Oct, arriving in San Francisco International.Price includes taxes and charges.From 589 €, select.
      Helena.682 € per passenger.Departing Sat, 26 Dec, returning Sat, 2 Jan.Return flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Sat, 26 Dec, arriving in Helena.Inbound indirect flight with Delta, departs from Helena on Sat, 2 Jan, arriving in San Francisco International.Price includes taxes and charges.From 682 €, select.
      Helena.839 € per passenger.Departing Sat, 21 Nov, returning Sat, 28 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Sat, 21 Nov, arriving in Helena.Inbound indirect flight with Delta, departs from Helena on Sat, 28 Nov, arriving in San Francisco International.Price includes taxes and charges.From 839 €, select.
      Helena.845 € per passenger.Departing Thu, 27 Aug, returning Sun, 30 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from San Francisco International on Thu, 27 Aug, arriving in Helena.Inbound indirect flight with Delta, departs from Helena on Sun, 30 Aug, arriving in San Francisco International.Price includes taxes and charges.From 845 €, select.

      Find the cheapest month to fly from San Francisco International to Helena

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Francisco International to Helena flights are currently cheapest in June.
      Aug
      from 845 €
      Sep
      from 429 €
      Oct
      from 422 €
      Nov
      from 839 €
      Dec
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      Jan
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      Feb
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      Mar
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      Apr
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      May
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      Jun
      from 401 €
      Jul
      from 432 €

      San Francisco International to Helena: Alternative routes

      Compare routes from San Francisco International to Helena below. You may find an airport to fly into that's cheaper, faster, or easier than Helena.

      Helena

      4km from central Helena
      Closest
      from 401 €
      Search flights

      Butte

      80km from central Helena
      Cheapest
      from 277 €
      Search flights

      San Francisco to Helena: Flight information

      The things to know before you go.
      Cheapest flight found401 €
      Cheapest month to flyJune

      Finding cheap flights from San Francisco International to Helena: Frequently asked questions

      The best price we found for a return flight from San Francisco International to Helena is 401 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      Currently, there are no airlines that fly direct from San Francisco International to Helena. But we found flights with one or more stops from 401 €.
      As of August 2026, there are no flights flying from San Francisco International to Helena.
      The cheapest month to fly from San Francisco International to Helena is usually June.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to Helena Airport on Tuesday, 1 June 2027.
      No airlines currently offer direct flights between San Francisco International Airport and Helena Airport. Most routes have one or more stops.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Helena but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Helena is around 40 days in advance, so don’t leave your flight to the last minute.

      Currently, Delta offers the cheapest flight tickets to Helena.

      Flying from San Francisco International Airport (SFO) to Helena Airport (HLN): what you need to know

      • Give yourself plenty of time to make your SFO to HLN flight. Generally, it's best to arrive two hours before international departures and an hour ahead for domestic flights.

      • During popular months like July, it's a good idea to get to the airport earlier than normal. Arrive two hours before domestic departures and four hours ahead of an international flight whenever you're flying during a peak period in general.

      • If you'd like to explore another city along the way, look for a flight with a stopover. To see your options for tickets from San Francisco International Airport to Helena Airport, deselect 'Direct flights only.' Denver International Airport is a sought-after stop between SFO and HLN.

      How to find the cheapest flights from San Francisco International Airport (SFO) to Helena Airport (HLN)

      • Currently, 199 € is the cheapest price we've seen for a one-way San Francisco International Airport to Helena Airport flight. The best price for a return ticket is 401 €. Keep in mind that fares can change due to demand when booking.

      • It's usually smart to book in advance if you're hoping to get cheap tickets from SFO to HLN. That's because airlines adjust prices based on demand, which tends to rise closer to departure.

      • The 'Whole month' search function shows you the cheapest flights from San Francisco International Airport to Helena Airport throughout the month. It's an easy way to snap up a bargain if your plans are flexible.

      • Stay on top of deals for cheap flights from SFO to HLN by setting up a Price Alert. You'll get an email or notification through the app when fares go down.

      • Pick your preferred departure and arrival times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from San Francisco International Airport to Helena Airport.

      Handy information about San Francisco International Airport (SFO)

      • When it comes to the on-time performance of San Francisco International Airport, 78% of flights arrive within the scheduled timeframe.

      • San Francisco International Airport is about 21 kilometres from central San Francisco. If you're ride-sharing, catching a taxi or driving from the centre, it'll take you 25 minutes or so to arrive, depending on the traffic.

      • Taking public transport? Expect a trip time of around 35 minutes.

      • Booked an early flight from San Francisco International Airport to Helena Airport? Avoid rushing to the terminal (and get some extra shut-eye) by picking one of these hotels close to SFO:

      Arriving at Helena Airport (HLN)

      • The last thing you want is a long trip to your hotel if you're landing late on a San Francisco International Airport to Helena Airport flight. Stay at one of these accommodation options near HLN instead:

      • Go where the road takes you with a Helena Airport rental car. Pick up your wheels from Budget, Enterprise or Avis and see more of Helena and beyond.

      • Book your vehicle from Helena Airport a few weeks in advance to get the best possible rate. If you're going away during peak season, it's a good idea to book even earlier.

      When to fly to Helena Airport (HLN)

      • The quietest month for a flight from San Francisco International Airport to Helena Airport is March, while October is the most popular. Pick the best time to go to Helena based on whether you prefer a bustling atmosphere or a more laid-back vibe.

      • Lock in your flight from San Francisco International Airport to Helena Airport for July if you'd like to go to Helena during its warmest month. You can expect temperatures of between 9ºC (48ºF) and 31ºC (88ºF).

      • Search for cheap tickets from SFO to HLN in February if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -17ºC (1ºF) and 3ºC (37ºF) on average.

      Explore more of the United States

      • Helena has loads to offer, but there are so many other parts of the United States waiting to be discovered. Around 418 kilometres west of Helena, a trip to Spokane will keep you busy. Check out popular attractions like Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes.

      • Boise is another essential stop in the United States and is around 467 kilometres south-west of Helena. No trip is complete without visiting Cathedral Of The Rockies, Boise Depot and St. John's Cathedral.

      Plan the rest of your trip from San Francisco to Helena

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.