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$145+ 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 6/27. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SJC
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
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 January 21, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/21. 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.
Tue 2/244:36 pm
HLN
-
SJC
1 stop18h 52m
Alaska Airlines
Thu 2/268:00 am
SJC
-
HLN
1 stop6h 59m
Alaska Airlines
Deal found 1/21$297
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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.
Mon 5/46:22 pm
HLN
-
SJC
1 stop5h 13m
Alaska Airlines
Thu 5/76:15 am
SJC
-
HLN
1 stop10h 30m
Alaska Airlines
Deal found 1/20$418
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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.
Thu 2/56:48 pm
HLN
-
SJC
2 stops15h 28m
Alaska Airlines
Mon 2/97:22 pm
SJC
-
HLN
2 stops21h 49m
Alaska Airlines
Deal found 1/21$714
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 1/306:48 pm
HLN
-
SJC
1 stop19h 20m
Alaska Airlines
Tue 2/36:02 pm
SJC
-
HLN
1 stop23h 09m
Alaska Airlines
Deal found 1/20$791
This Delta deal was found by Cheapflights users on 1/21. 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 2/55:30 am
HLN
-
SJC
1 stop4h 30m
Delta
Mon 2/94:54 pm
SJC
-
HLN
1 stop4h 35m
Delta
Deal found 1/21$852
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 1/236:48 pm
HLN
-
SJC
1 stop23h 20m
Alaska Airlines
Mon 1/2611:00 am
SJC
-
HLN
1 stop6h 11m
Alaska Airlines
Deal found 1/21$863

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 January 21, 2026.

Round-trip from

$297
(Alaska Airlines)

One-way from

$145
(Delta)
From Helena to San Jose
Search Deals
One-way flight from Helena to San Jose
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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 January 21, 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

Tue 2/24

4:36 pm-10:28 am

1 stop18h 52m

San Jose

Thu 2/26

8:00 am-3:59 pm

1 stop6h 59m

$297

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Mon 5/4

6:22 pm-10:35 pm

1 stop5h 13m

San Jose

Thu 5/7

6:15 am-5:45 pm

1 stop10h 30m

$418

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Thu 2/5

6:48 pm-9:16 am

2 stops15h 28m

San Jose

Mon 2/9

7:22 pm-6:11 pm

2 stops21h 49m

$714

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Thu 2/5

5:30 am-9:00 am

1 stop4h 30m

San Jose

Mon 2/9

4:54 pm-10:29 pm

1 stop4h 35m

$852

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 6/27

4:59 pm-10:04 pm

1 stop6h 05m

$145

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 6/27

5:45 am-8:57 am

1 stop4h 12m

$145

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sun 6/28

5:45 am-8:57 am

1 stop4h 12m

$145

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Mon 2/2

5:30 am-9:00 am

1 stop4h 30m

$421

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

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

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?

    Alaska Airlines can get you from Helena to San Jose, California in just under 18h 52m. 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 $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.

See more FAQs

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