How long is the flight from Helena to San Jose, California?

Alaska Airlines can get you from Helena to San Jose, California in just under 16h. Your travel time can differ by up to . The distance from Helena to San Jose, California is about 816 mi.

In terms of precipitation, rainfall in San Jose, California ranges from 0.0 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. July is typically the driest time to visit San Jose, California when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Jose, California, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 50.0 F).

What is the cheapest time of day to fly from HLN to SJC?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Helena to San Jose, California as you normally would.

Can I find deals for flights from Helena to San Jose that include hotel bookings?

Yes. In addition to deals on Helena to San Jose flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Helena to San Jose?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to San Jose.

Can I find deals for business class flights from Helena to San Jose?

Yes. Cheapflights offers flight deals from Helena to San Jose by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$120+ Flights from Helena to San Jose, CA

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Cheap flight deals from Helena to San Jose

Cheapest flights from Helena to San Jose
Explore the most affordable flight options available from Helena to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Wed 12/312:26 pmHLN - SJC

1 stop7h 50mUnited Airlines

Sun 1/42:29 pmSJC - HLN

1 stop6h 02mUnited Airlines

Deal found 12/16

$580

Wed 12/316:32 pmHLN - SJC

2 stops14h 50mAlaska Airlines

Sun 1/46:15 amSJC - HLN

1 stop10h 40mAlaska Airlines

Deal found 12/16

$782

Best flights from Helena to San Jose
Discover carefully curated flight deals from Helena to San Jose that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.

Sat 1/246:48 pmHLN - SJC

1 stop16h 00mAlaska Airlines

Tue 1/2711:00 amSJC - HLN

1 stop6h 11mAlaska Airlines

Deal found 12/15

$270

Wed 12/312:26 pmHLN - SJC

1 stop7h 50mUnited Airlines

Sun 1/42:29 pmSJC - HLN

1 stop6h 02mUnited Airlines

Deal found 12/16

$580

Fri 3/274:10 pmHLN - SJC

1 stop25h 35mAlaska Airlines

Sun 3/298:10 amSJC - HLN

1 stop6h 28mAlaska Airlines

Deal found 12/16

$466

Wed 12/316:32 pmHLN - SJC

2 stops14h 50mAlaska Airlines

Sun 1/46:15 amSJC - HLN

1 stop10h 40mAlaska Airlines

Deal found 12/16

$782

Last-minute flights from Helena to San Jose
Discover last-minute flight deals from Helena to San Jose. Data last updated December 16, 2025 and is based on user searches.

Wed 12/312:26 pmHLN - SJC

1 stop7h 50mUnited Airlines

Sun 1/42:29 pmSJC - HLN

1 stop6h 02mUnited Airlines

Deal found 12/16

$580

Wed 12/316:32 pmHLN - SJC

2 stops14h 50mAlaska Airlines

Sun 1/46:15 amSJC - HLN

1 stop10h 40mAlaska Airlines

Deal found 12/16

$782

Sat 1/36:32 pmHLN - SJC

2 stops15h 26mAlaska Airlines

Mon 1/55:57 pmSJC - HLN

1 stop22h 58mAlaska Airlines

Deal found 12/16

$721

Sat 1/246:48 pmHLN - SJC

1 stop16h 00mAlaska Airlines

Tue 1/2711:00 amSJC - HLN

1 stop6h 11mAlaska Airlines

Deal found 12/15

$270

One-way flights from Helena to San Jose
Search for one-way flight options from Helena to San Jose. Find affordable one-way fares based on user searches. Data last updated December 16, 2025.

Tue 1/135:30 amHLN - SJC

1 stop4h 27mDelta

Deal found 12/15

$120

Find flight deals from Helena to San Jose

Round-trip from	$270 (Alaska Airlines)
One-way from	$120 (Delta)

From Helena to San Jose

Search Deals

One-way flight from Helena to San Jose

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Fly from

Fly to

Route

Depart

Return

Price

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 1/24

6:48 pm-9:48 am

1 stop16h 00m

San Jose

Tue 1/27

11:00 am-6:11 pm

1 stop6h 11m

$270

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Fri 3/27

4:10 pm-4:45 pm

1 stop25h 35m

San Jose

Sun 3/29

8:10 am-3:38 pm

1 stop6h 28m

$466

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Wed 12/31

2:26 pm-9:16 pm

1 stop7h 50m

San Jose

Sun 1/4

2:29 pm-9:31 pm

1 stop6h 02m

$580

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Wed 12/31

6:32 pm-8:22 am

2 stops14h 50m

San Jose

Sun 1/4

6:15 am-5:55 pm

1 stop10h 40m

$782

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Tue 1/13

5:30 am-8:57 am

1 stop4h 27m

$120

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Best time to book a flight from Helena to San Jose

Have a flexible travel schedule? Discover the best time to fly to San Jose from Helena with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Helena to San Jose

What is the cheapest month to book a flight from Helena to San Jose, California?

Currently, July is the cheapest month in which you can book a flight from Helena to San Jose, California (average of $41). Flying from Helena to San Jose, California in May is currently the most expensive (average of $219). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

How long is the flight from Helena to San Jose, California?
Alaska Airlines can get you from Helena to San Jose, California in just under 16h. Your travel time can differ by up to . The distance from Helena to San Jose, California is about 816 mi.
Can I find deals for flights from Helena to San Jose that include hotel bookings?
Yes. In addition to deals on Helena to San Jose flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Helena to San Jose?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to San Jose.
Can I find deals for business class flights from Helena to San Jose?
Yes. Cheapflights offers flight deals from Helena to San Jose by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Helena to San Jose, California?
Currently, July is the cheapest month in which you can book a flight from Helena to San Jose, California (average of $41). Flying from Helena to San Jose, California in May is currently the most expensive (average of $219). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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$120+ Cheap flights from Helena to San Jose, CA (HLN - SJC)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Helena to San Jose with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Helena to San Jose

Cheapest flights from Helena to San JoseExplore the most affordable flight options available from Helena to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Explore the most affordable flight options available from Helena to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Find flight deals from Helena to San Jose

Round-trip from

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Use the filters below to find and compare flights from Helena to San Jose that are best for you.

Best time to book a flight from Helena to San Jose

Have a flexible travel schedule? Discover the best time to fly to San Jose from Helena with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Helena to San Jose

What is the cheapest month to book a flight from Helena to San Jose, California?

Related info for your journey

Find useful and relevant information for your journey from Helena to San Jose. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Helena to San Jose, California?

Can I find deals for flights from Helena to San Jose that include hotel bookings?

How can I find direct flights from Helena to San Jose?

Can I find deals for business class flights from Helena to San Jose?

What is the cheapest month to book a flight from Helena to San Jose, California?

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Cheapest flights from Helena to San Jose
Explore the most affordable flight options available from Helena to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.