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

Popular airlines from Helena, MT (HLN-Helena Regional) to San Francisco Intl. Airport (SFO)

Find the cheapest month to fly from Helena (HLN) to San Francisco (SFO)

January is typically the cheapest month to fly

From US$ 220 - US$ 657 per traveler.
Flights from Helena (HLN) to San Francisco (SFO)
Origin airport
Helena Regional
Destination airport
San Francisco Intl.
Distance
817 mi

Helena to San Francisco Flights

The cheapest times to fly from Helena to San Francisco

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Helena to San Francisco are during the month of . You can find some of the cheapest flights from Helena to San Francisco with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Helena to San Francisco

Sunday is one of the best days to book for cheap flights from Helena to San Francisco: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Helena to San Francisco

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Helena to San Francisco in 2026. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Helena to San Francisco flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Helena to San Francisco airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO) cost?
Get a cheap one-way flight or cheap return flight from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO)?
is the most affordable month to fly from HLN to SFO. Traveling during quieter months is often the key to scoring lower fares.
What is the cheapest airline that flies from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest HLN to SFO flight.
How many flights per day from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO)?
There are no daily direct flights from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from HLN to SFO?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO)?
To arrive at San Francisco Intl. Airport (SFO) on schedule, choose a flight that takes off from Helena Regional Airport (HLN) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO) last-minute?
Booking your plane ticket from HLN to SFO shortly before your trip is typically more expensive. But if you're flexible with your itinerary, you could snag a cheap last-minute fare.
Is it cheaper to book a HLN to SFO flight and hotel package?
Compared with arranging flights and hotels separately, booking a HLN to SFO flight and hotel package with Expedia could result in significant savings. Better still, having everything in one convenient place will take the hassle out of travel planning. Simply pick your flights and choose from our wide range of stays, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO)?
If you reserved your HLN to SFO flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

Explore a world of travel with Expedia

*Available to One Key members.