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$339+ Cheap flights from Helena to San Jose (HLN - SJC)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SJC
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$339
(Delta)
From Helena to San Jose
Search Deals

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 September 17, 2025.

This Delta deal was found by Cheapflights users on 9/17. 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.
Sat 10/115:45 amHLN - SJC
1 stop4h 19mDelta
Sat 10/185:55 amSJC - HLN
1 stop5h 25mDelta
Deal found 9/17$339
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 12/306:32 pmHLN - SJC
1 stop15h 50mAlaska Airlines
Fri 1/210:24 amSJC - HLN
1 stop6h 31mAlaska Airlines
Deal found 9/16$443
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.
Mon 12/296:32 pmHLN - SJC
1 stop15h 50mAlaska Airlines
Fri 1/210:24 amSJC - HLN
1 stop6h 31mAlaska Airlines
Deal found 9/14$453
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 10/116:18 pmHLN - SJC
2 stops16h 55mAlaska Airlines
Sat 10/187:45 pmSJC - HLN
1 stop20h 56mAlaska Airlines
Deal found 9/17$476
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 12/306:32 pmHLN - SJC
1 stop15h 50mAlaska Airlines
Sat 1/37:05 amSJC - HLN
2 stops9h 50mAlaska Airlines
Deal found 9/16$485
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.
Sun 12/286:32 pmHLN - SJC
1 stop15h 50mAlaska Airlines
Fri 1/25:57 pmSJC - HLN
1 stop22h 58mAlaska Airlines
Deal found 9/14$493
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.
Mon 12/296:32 pmHLN - SJC
1 stop15h 50mAlaska Airlines
Sat 1/37:05 amSJC - HLN
2 stops9h 50mAlaska Airlines
Deal found 9/14$495
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 12/306:32 pmHLN - SJC
1 stop15h 50mAlaska Airlines
Sun 1/46:15 amSJC - HLN
1 stop10h 40mAlaska Airlines
Deal found 9/16$513
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 12/296:32 pmHLN - SJC
1 stop15h 50mAlaska Airlines
Sun 1/46:15 amSJC - HLN
1 stop10h 40mAlaska Airlines
Deal found 9/16$523
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.
Sat 12/276:32 pmHLN - SJC
1 stop15h 50mAlaska Airlines
Fri 1/210:24 amSJC - HLN
1 stop6h 31mAlaska Airlines
Deal found 9/14$533

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 September 17, 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

Sat 10/11

5:45 am-9:04 am

1 stop4h 19m

San Jose

Sat 10/18

5:55 am-12:20 pm

1 stop5h 25m

$339

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 3/7

4:10 pm-10:03 pm

1 stop6h 53m

San Jose

Tue 3/10

8:10 am-3:43 pm

1 stop6h 33m

$357

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 3/7

12:50 pm-4:31 pm

1 stop4h 41m

San Jose

Tue 3/10

7:15 am-10:38 pm

2 stops14h 23m

$426

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 3/7

4:10 pm-10:03 pm

1 stop6h 53m

San Jose

Tue 3/10

2:35 pm-3:43 pm

2 stops24h 08m

$431

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Mon 12/29

6:32 pm-9:22 am

1 stop15h 50m

San Jose

Fri 1/2

10:24 am-5:55 pm

1 stop6h 31m

$453

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Sat 10/11

6:18 pm-10:13 am

2 stops16h 55m

San Jose

Sat 10/18

7:45 pm-5:41 pm

1 stop20h 56m

$476

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Tue 12/30

6:32 pm-9:22 am

1 stop15h 50m

San Jose

Sat 1/3

7:05 am-5:55 pm

2 stops9h 50m

$485

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Mon 12/29

6:32 pm-9:22 am

1 stop15h 50m

San Jose

Sat 1/3

7:05 am-5:55 pm

2 stops9h 50m

$495

HelenaSan Jose

HLN - SJC

HLNSJC

Helena

Tue 12/30

6:32 pm-9:22 am

1 stop15h 50m

San Jose

Sun 1/4

6:15 am-5:55 pm

1 stop10h 40m

$513

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

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?

Currently, September is the cheapest month in which you can book a flight from Helena to San Jose (average of $255). Flying from Helena to San Jose in June is currently the most expensive (average of $359). 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 September 17, 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
8.0
Very good
7,961 reviews

Overall

8.0

Boarding

8.2

Food

7.3

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
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Overall

8.0

Boarding

8.2

Food

7.3

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?

    For as low as $339, Delta can have you in San Jose from Helena in 4h 19m. There are 816 mi between Helena and San Jose. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from Helena to San Jose is Delta. Our recent data shows that you can find tickets from as low as $250 on this airline.

  • 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?

    Currently, September is the cheapest month in which you can book a flight from Helena to San Jose (average of $255). Flying from Helena to San Jose in June is currently the most expensive (average of $359). 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$250Average$396FlexibilityNo cancel feeOn-timeN/A

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