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$109+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SJC
Mar 9 — Mar 161
Mon 3/9
Mon 3/16
1 adult, Economy
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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 February 7, 2026.

This Alaska Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:59 pm
HLN
-
SJC
1 stop7h 40m
Alaska Airlines
Wed 8/126:00 am
SJC
-
HLN
1 stop9h 22m
Alaska Airlines
Deal found 2/6$314
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/612:50 pm
HLN
-
SJC
1 stop6h 27m
Delta
Sun 8/95:00 pm
SJC
-
HLN
1 stop4h 34m
Delta
Deal found 2/5$339
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:45 am
HLN
-
SJC
1 stop4h 12m
Delta
Sat 8/85:00 pm
SJC
-
HLN
1 stop4h 34m
Delta
Deal found 2/5$344
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:45 am
HLN
-
SJC
1 stop4h 12m
Delta
Sun 8/95:00 pm
SJC
-
HLN
1 stop4h 34m
Delta
Deal found 2/5$369
This Expedia deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/184:59 pm
HLN
-
SJC
1 stop6h 05m
Alaska Airlines
Wed 6/2410:13 am
SJC
-
HLN
1 stop5h 09m
Alaska Airlines
Deal found 2/5$379
This Alaska Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/204:36 pm
HLN
-
SJC
1 stop7h 23m
Alaska Airlines
Tue 2/2410:16 am
SJC
-
HLN
1 stop4h 43m
Alaska Airlines
Deal found 2/5$559
This Alaska Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/144:36 pm
HLN
-
SJC
1 stop7h 23m
Alaska Airlines
Wed 2/182:36 pm
SJC
-
HLN
1 stop24h 23m
Alaska Airlines
Deal found 2/4$765

Find flight deals from Helena to San Jose

Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to San Jose (SJC). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 7, 2026.

Round-trip from

$339
(Delta)

One-way from

$109
(Delta)
From Helena to San Jose
Search Deals
One-way flight from Helena to San Jose
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Helena to San Jose that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 7, 2026.
Use the filters below to find and compare flights from Helena to San Jose that are best for you.

Fly from

Helena

Fly to

San Jose

Route

Depart

Return

Price

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Thu 8/6

12:50 pm-6:17 pm

1 stop6h 27m

San Jose

Sun 8/9

5:00 pm-10:34 pm

1 stop4h 34m

$339

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Wed 8/5

5:45 am-8:57 am

1 stop4h 12m

San Jose

Sat 8/8

5:00 pm-10:34 pm

1 stop4h 34m

$344

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Wed 8/5

5:45 am-8:57 am

1 stop4h 12m

San Jose

Sun 8/9

5:00 pm-10:34 pm

1 stop4h 34m

$369

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Thu 6/18

4:59 pm-12:45 pm

2 stops20h 46m

San Jose

Wed 6/24

6:00 am-4:22 pm

1 stop9h 22m

$441

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Fri 2/20

4:36 pm-10:59 pm

1 stop7h 23m

San Jose

Tue 2/24

10:16 am-3:59 pm

1 stop4h 43m

$559

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Wed 4/15

5:40 am-8:47 am

1 stop4h 07m

$109

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sun 4/26

5:40 am-8:47 am

1 stop4h 07m

$136

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Wed 4/15

6:22 pm-10:02 am

2 stops16h 40m

$163

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sun 4/26

6:22 pm-9:44 am

2 stops16h 22m

$260

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Wed 4/15

6:22 pm-6:02 pm

3 stops48h 40m

$348

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/6

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 $224). 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

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?

    Delta and Alaska Airlines can get you from Helena to San Jose, California in just under 6h 27m. Your travel time can differ by up to 14h 19m. 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 $224). 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.

See more FAQs

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