Cheap Alaska Airlines flights San Francisco (SFO) to Helena (HLN)

Set the “Price (lowest to highest)” filter on Expedia to look for cheap Alaska Airlines return flights from SFO to HLN. Affordable one-way fares are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Browse for one-way or return flights to Helena in December or January. You could find an affordable fare with Alaska Airlines during these off-season months.

Start searching one to three months ahead of your departure date to get cheap fares on Alaska Airlines flights from San Francisco Intl. Airport (SFO) to Helena Regional Airport (HLN). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing right, and you can enjoy significant savings on domestic journeys.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To find out if there’s a direct route from SFO to HLN with Alaska Airlines or any other carriers, use our “Nonstop” filter when searching for flights.

To find the earliest departure from SFO to HLN with Alaska Airlines, sort your results by “Early Morning” and “Morning.” Choosing an early flight generally means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Board an Alaska Airlines flight from San Francisco Intl. Airport (SFO) to Helena, and you’re most likely to come in to Helena Regional Airport (HLN). This is the airline’s main hub in this city.

Jetting off from SFO to HLN with Alaska Airlines means enjoying a host of benefits, such as top-tier customer service and an excellent in-flight experience. Plus, when you book through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That’s on top of the Mileage Plan points you can earn with Alaska Airlines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of making your booking, but your airline may charge you after that. For more details about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to adjust your plans without being charged, tick the “Changes included” or “No cancel fee” filter when planning your next adventure.