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

Delta and Alaska Airlines can get you from Helena to San Jose, California in just under 4h 12m. Your travel time can differ by up to 16h 42m. The distance from Helena to San Jose, California is about 816 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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.

$238+ Flights from Helena to San Jose, CA

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Cheap flight deals from Helena to San Jose

Round-trip from	$259 (Alaska Airlines)
One-way from	$238 (Alaska Airlines)

From Helena to San Jose

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One-way flight from Helena to San Jose

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Find 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 January 7, 2026.

Fri 5/15:30 amHLN - SJC

1 stop4h 12mDelta

Tue 5/56:00 amSJC - HLN

1 stop5h 24mDelta

Deal found 1/7

$255

Wed 1/286:48 pmHLN - SJC

1 stop20h 54mAlaska Airlines

Sat 1/3111:00 amSJC - HLN

1 stop6h 11mAlaska Airlines

Deal found 1/6

$259

Fri 5/16:22 pmHLN - SJC

2 stops18h 45mAlaska Airlines

Tue 5/512:44 pmSJC - HLN

2 stops28h 01mAlaska Airlines

Deal found 1/7

$321

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 January 7, 2026.

Fri 5/15:30 amHLN - SJC

1 stop4h 12mDelta

Tue 5/56:00 amSJC - HLN

1 stop5h 24mDelta

Deal found 1/7

$255

Wed 1/286:48 pmHLN - SJC

1 stop20h 54mAlaska Airlines

Sat 1/3111:00 amSJC - HLN

1 stop6h 11mAlaska Airlines

Deal found 1/6

$259

Fri 5/16:22 pmHLN - SJC

2 stops18h 45mAlaska Airlines

Tue 5/512:44 pmSJC - HLN

2 stops28h 01mAlaska Airlines

Deal found 1/7

$321

Last-minute flights from Helena to San Jose
Discover last-minute flight deals from Helena to San Jose. Data last updated January 7, 2026 and is based on user searches.

Wed 1/286:48 pmHLN - SJC

1 stop20h 54mAlaska Airlines

Sat 1/3111:00 amSJC - HLN

1 stop6h 11mAlaska Airlines

Deal found 1/6

$259

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 January 7, 2026.

Mon 1/266:48 pmHLN - SJC

1 stop16h 00mAlaska Airlines

Deal found 1/6

$238

Fly from

Fly to

Route

Depart

Return

Price

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Fri 5/1

5:30 am-8:42 am

1 stop4h 12m

San Jose

Tue 5/5

6:00 am-12:24 pm

1 stop5h 24m

$255

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Wed 1/28

6:48 pm-2:42 pm

1 stop20h 54m

San Jose

Sat 1/31

11:00 am-6:11 pm

1 stop6h 11m

$259

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Fri 5/1

6:22 pm-12:07 pm

2 stops18h 45m

San Jose

Tue 5/5

12:44 pm-5:45 pm

2 stops28h 01m

$321

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Mon 1/26

6:48 pm-9:48 am

1 stop16h 00m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

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 $228). 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?
Delta and Alaska Airlines can get you from Helena to San Jose, California in just under 4h 12m. Your travel time can differ by up to 16h 42m. The distance from Helena to San Jose, California is about 816 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
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 $228). 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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$238+ 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 1/26. 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

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Cheap flight deals from Helena to San Jose

Round-trip from

One-way from

Find 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 January 7, 2026.

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 January 7, 2026.

Cheapflights Fare Finder

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 January 7, 2026.