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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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SJC
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
1 adult, Economy
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Cheap 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 November 21, 2025.

Round-trip from

$254
(Delta)

One-way from

$120
(United 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 November 21, 2025.

This Delta deal was found by Cheapflights users on 11/19. 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.
Tue 12/95:30 amHLN - SJC
1 stop4h 40mDelta
Thu 12/115:45 amSJC - HLN
1 stop5h 40mDelta
Deal found 11/19$372
This Alaska Airlines deal was found by Cheapflights users on 11/19. 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 12/96:28 pmHLN - SJC
1 stop26h 32mAlaska Airlines
Thu 12/117:40 amSJC - HLN
2 stops9h 11mAlaska Airlines
Deal found 11/19$464
This Alaska Airlines deal was found by Cheapflights users on 11/19. 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 12/46:28 pmHLN - SJC
1 stop5h 31mAlaska Airlines
Mon 12/811:16 amSJC - HLN
1 stop5h 35mAlaska Airlines
Deal found 11/19$558
This Alaska Airlines deal was found by Cheapflights users on 11/20. 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 11/217:32 pmHLN - SJC
1 stop5h 26mAlaska Airlines
Tue 12/211:16 amSJC - HLN
1 stop5h 35mAlaska Airlines
Deal found 11/20$873
This lol.travel deal was found by Cheapflights users on 11/20. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/247:32 pmHLN - SJC
1 stop5h 26mHawaiian Airlines
Thu 12/1111:16 amSJC - HLN
1 stop5h 35mHawaiian Airlines
Deal found 11/20$969
This Delta deal was found by Cheapflights users on 11/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/215:30 amHLN - SJC
2 stops10h 27mDelta
Tue 12/22:05 pmSJC - HLN
2 stops7h 25mDelta
Deal found 11/20$1,612

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 November 21, 2025.
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 1/15

1:10 pm-10:57 am

2 stops22h 47m

San Jose

Sat 1/17

5:54 am-12:27 pm

1 stop5h 33m

$254

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Fri 4/24

5:45 am-8:57 am

1 stop4h 12m

San Jose

Sun 4/26

5:45 am-12:23 pm

1 stop5h 38m

$314

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Tue 12/9

5:30 am-9:10 am

1 stop4h 40m

San Jose

Thu 12/11

5:45 am-12:25 pm

1 stop5h 40m

$372

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Tue 12/9

6:28 pm-8:00 pm

1 stop26h 32m

San Jose

Thu 12/11

7:40 am-5:51 pm

2 stops9h 11m

$464

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Fri 4/24

4:10 pm-10:04 pm

1 stop6h 54m

San Jose

Sun 4/26

7:00 am-3:38 pm

2 stops31h 38m

$536

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Thu 12/4

6:28 pm-10:59 pm

1 stop5h 31m

San Jose

Mon 12/8

11:16 am-5:51 pm

1 stop5h 35m

$558

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 1/31

6:15 am-1:38 pm

1 stop8h 23m

$120

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 1/17

2:27 pm-8:56 pm

1 stop7h 29m

$144

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 1/31

6:48 pm-4:37 pm

2 stops22h 49m

$187

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 1/17

6:48 pm-4:37 pm

2 stops22h 49m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

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.

Reviews of airlines servicing San Jose

Get insights into the airlines that provide service to San Jose. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Jose. Reviews last updated November 21, 2025.
Read reviews from past customers who have flown Delta from Helena to San Jose. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,002 reviews

Food

7.3

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,002 reviews
Delta
7.9
Good
8,002 reviews

Food

7.3

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 can get you from Helena to San Jose, California in just under 22h 47m. Your travel time can differ by up to . The distance from Helena to San Jose, California is about 816 mi.

  • What is the cheapest airline to fly from Helena to San Jose, California round-trip?

    Flying on Delta is currently your cheapest option to San Jose, California, with prices starting at $336.

  • 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.

See more FAQs

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Top airline flying from Helena to San Jose

Discover the top airline that operate flights from Helena to San Jose. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$336Average$418FlexibilityNo cancel feeOn-timeN/A

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