$139 Cheap Alaska Airlines flights Helena (HLN) to San Diego (SAN)

View $139 flight on Sat, Aug 30, 2025Opens in a new window

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$139 Cheap Alaska Airlines flights Helena (HLN) to San Diego (SAN)

Prices were available within the past 7 days and start at $139 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Helena (HLN) to San Diego (SAN)
Origin airport
Helena Regional
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, Delta, Hawaiian Airlines, United
Popular airline
Alaska Airlines
Distance
997 mi

Frequently asked questions

How much is an Alaska Airlines flight from Helena Regional Airport (HLN) to San Diego Intl. Airport (SAN)?
You can discover affordable round-trip Alaska Airlines flights from HLN to SAN by organizing your results from "Price (lowest to highest)" on Expedia. Or search for deals from $139 for a one-way journey.**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.
What is the cheapest month to fly from HLN to SAN with Alaska Airlines?
Alaska Airlines flights to San Diego are usually more affordable in the off-peak months of January and November. Whether you need a one-way or a return ticket, you could score a better deal then.
What is the cheapest time to book flights from Helena Regional Airport (HLN) to San Diego Intl. Airport (SAN) with Alaska Airlines?
Begin your search one to three months ahead of your departure date to find cheaper fares on Alaska Airlines flights from Helena Regional Airport (HLN) to San Diego Intl. Airport (SAN). 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 cut 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 spot on, 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.
Does Alaska Airlines fly nonstop from Helena Regional Airport (HLN) to San Diego Intl. Airport (SAN)?
Click on the "Nonstop" filter when searching for direct Alaska Airlines flights from HLN to SAN. You can also compare other airlines servicing the same nonstop route.
What is the earliest Alaska Airlines flight from HLN to SAN?
Browse Alaska Airlines's earliest flights from HLN to SAN by selecting the "Early Morning" and "Morning" filters. Not only will you get to where you're going sooner, early departures are also 20% less likely to be canceled.**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.
What airports does Alaska Airlines fly into in San Diego?
Take an Alaska Airlines flight from Helena Regional Airport (HLN) to San Diego, and you'll likely touch down at San Diego Intl. Airport (SAN). This is the airline's main hub in this city.
Why fly with Alaska Airlines from HLN to SAN?
Alaska Airlines makes traveling from HLN to SAN enjoyable with top-tier customer service and a rewarding loyalty program. You even have the chance to collect points with Mileage Plan. Be sure to sign up to Expedia's free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Alaska Airlines flight from Helena Regional Airport (HLN) to San Diego Intl. Airport (SAN)?
It's usually possible to cancel or modify your flight, although there may be additional fees if you booked over 24 hours ago. Need flexible options? Make use of our "No cancel fee" and "Changes included" filters to find flights that won't charge you extra if you need to alter your plans. To update your itinerary, head to "Trips," select your flight and click on "Manage Booking" for more information.

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