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Helena

$136+ Cheap flights from San Jose to Helena (SJC - HLN)

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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
SJC — HLN
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from San Jose to Helena

Discover tips and strategies to find the most affordable flight options for your journey from San Jose (SJC) to Helena (HLN). 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 September 15, 2025.

Round-trip from

$315
(Delta)

One-way from

$136
(Alaska Airlines)
From San Jose to Helena
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One-way flight from San Jose to Helena
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Find flight deals from San Jose to Helena

Cheapest flights from San Jose to Helena
Explore the most affordable flight options available from San Jose to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Delta deal was found by Cheapflights users on 9/14. 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 12/115:45 amSJC - HLN
1 stop5h 41mDelta
Sun 12/145:30 amHLN - SJC
1 stop4h 40mDelta
Deal found 9/14$365
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 12/117:00 amSJC - HLN
2 stops9h 51mAlaska Airlines
Sun 12/146:28 pmHLN - SJC
1 stop5h 31mAlaska Airlines
Deal found 9/14$424
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2912:30 pmSJC - HLN
1 stop7h 30mUnited Airlines
Fri 10/36:30 amHLN - SJC
1 stop8h 10mUnited Airlines
Deal found 9/14$573
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 11/227:01 pmSJC - HLN
1 stop22h 51mAlaska Airlines
Sat 11/297:32 pmHLN - SJC
1 stop5h 26mAlaska Airlines
Deal found 9/15$669
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 9/239:00 amSJC - HLN
1 stop5h 21mAlaska Airlines
Mon 9/294:02 pmHLN - SJC
1 stop6h 03mAlaska Airlines
Deal found 9/15$675
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 9/179:00 amSJC - HLN
1 stop5h 21mAlaska Airlines
Mon 9/294:02 pmHLN - SJC
1 stop6h 03mAlaska Airlines
Deal found 9/15$709
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/228:45 amSJC - HLN
1 stop6h 19mUnited Airlines
Mon 9/292:44 pmHLN - SJC
1 stop7h 09mUnited Airlines
Deal found 9/15$734
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 9/228:02 pmSJC - HLN
2 stops18h 19mAlaska Airlines
Mon 9/294:02 pmHLN - SJC
1 stop6h 03mAlaska Airlines
Deal found 9/15$782
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/228:45 amSJC - HLN
1 stop6h 19mUnited Airlines
Sun 9/282:44 pmHLN - SJC
1 stop20h 08mUnited Airlines
Deal found 9/15$806

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Jose to Helena 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 September 15, 2025.
Use the filters below to find and compare flights from San Jose to Helena that are best for you.

Fly from

San Jose

Fly to

Helena

Route

Depart

Return

Price

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Thu 3/5

5:45 am-12:27 pm

1 stop5h 42m

Helena

Sat 3/14

5:35 am-9:12 am

1 stop4h 37m

$315

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Thu 3/5

5:45 am-12:27 pm

1 stop5h 42m

Helena

Thu 3/12

5:35 am-9:12 am

1 stop4h 37m

$315

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Wed 3/4

7:15 am-10:38 pm

2 stops14h 23m

Helena

Thu 3/12

5:35 am-9:12 am

1 stop4h 37m

$325

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Wed 3/4

7:15 am-10:38 pm

2 stops14h 23m

Helena

Fri 3/13

5:35 am-9:12 am

1 stop4h 37m

$325

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Wed 3/4

5:45 am-12:27 pm

1 stop5h 42m

Helena

Sun 3/15

5:35 am-9:12 am

1 stop4h 37m

$346

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Thu 3/5

5:45 am-12:27 pm

1 stop5h 42m

Helena

Sun 3/15

5:35 am-9:12 am

1 stop4h 37m

$346

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Sat 3/7

5:45 am-12:27 pm

1 stop5h 42m

Helena

Fri 3/13

5:35 am-9:12 am

1 stop4h 37m

$357

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Sun 3/8

5:45 am-12:27 pm

1 stop5h 42m

Helena

Sat 3/14

5:35 am-9:12 am

1 stop4h 37m

$357

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Sun 3/8

5:45 am-12:27 pm

1 stop5h 42m

Helena

Fri 3/13

5:35 am-9:12 am

1 stop4h 37m

$357

San JoseHelena

SJC - HLN

SJCHLN

San Jose

Mon 3/9

5:45 am-12:27 pm

1 stop5h 42m

Helena

Fri 3/13

5:35 am-9:12 am

1 stop4h 37m

$357

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 18 results
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Best time to book a flight from San Jose to Helena

Have a flexible travel schedule? Discover the best time to fly to Helena from San Jose 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 San Jose to Helena

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

Currently, February is the cheapest month in which you can book a flight from San Jose to Helena (average of $353). Flying from San Jose to Helena in May is currently the most expensive (average of $517). 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 San Jose to Helena. 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 San Jose to Helena?

    A quick flight from San Jose to Helena can take about 5h 42m. Delta provides one of the quickest options available for as low as $315. The distance from San Jose to Helena is about 816 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Jose to Helena 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 San Jose to Helena?

    Currently, February is the cheapest month in which you can book a flight from San Jose to Helena (average of $353). Flying from San Jose to Helena in May is currently the most expensive (average of $517). 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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