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$409+ Cheap flights from Helena to San Diego (HLN - SAN)

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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SAN
abr. 21 — abr. 281
lun. 4/21
lun. 4/28
1 adult, Economy
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Cheap flight deals from Helena to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to San Diego (SAN). 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 abril 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$409
(Delta)

Popular in

September

Cheapest in

February

Average price

$691
Provider with most accurate pricing for Helena-San Diego flight deals.
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Provider most trusted by Cheapflights users for Helena-San Diego flights.
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From Helena to San Diego
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Helena to San Diego

Cheapest flights from Helena to San Diego
Explore the most affordable flight options available from Helena to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 16, 2025.

This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/85:45 amHLN - SAN
1 stop4h 12mDelta
vie. 7/115:10 pmSAN - HLN
1 stop4h 23mDelta
Deal found 4/16$409
This Alaska Airlines deal was found by Cheapflights users on 4/16. 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.
mar. 7/84:08 pmHLN - SAN
1 stop6h 39mAlaska Airlines
vie. 7/119:32 pmSAN - HLN
2 stops16h 59mAlaska Airlines
Deal found 4/16$410
This United Airlines deal was found by Cheapflights users on 4/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/52:16 pmHLN - SAN
1 stop7h 39mUnited Airlines
sáb. 5/107:00 amSAN - HLN
1 stop5h 31mUnited Airlines
Deal found 4/16$454
This United deal was found by Cheapflights users on 4/16. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/112:16 pmHLN - SAN
2 stops11h 07mMultiple Airlines
vie. 5/168:15 amSAN - HLN
1 stop6h 16mMultiple Airlines
Deal found 4/16$1,092

Cheapflights Fare Finder

Customize your flight search to find flights from Helena to San Diego 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 abril 16, 2025.
Use the filters below to find and compare flights from Helena to San Diego that are best for you.

Fly from

Helena

Fly to

San Diego

Route

Depart

Return

Price

HelenaSan Diego

HLN - SAN

HLNSAN

Helena

mar. 7/8

5:45 am-8:57 am

1 stop4h 12m

San Diego

vie. 7/11

5:10 pm-10:33 pm

1 stop4h 23m

$409

HelenaSan Diego

HLN - SAN

HLNSAN

Helena

mar. 7/8

4:08 pm-9:47 pm

1 stop6h 39m

San Diego

vie. 7/11

9:32 pm-3:31 pm

2 stops16h 59m

$410

HelenaSan Diego

HLN - SAN

HLNSAN

Helena

lun. 5/5

2:16 pm-8:55 pm

1 stop7h 39m

San Diego

sáb. 5/10

7:00 am-1:31 pm

1 stop5h 31m

$454

HelenaSan Diego

HLN - SAN

HLNSAN

Helena

dom. 5/11

2:16 pm-12:23 am

2 stops11h 07m

San Diego

vie. 5/16

8:15 am-3:31 pm

1 stop6h 16m

$1,092

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Compare providers for flights from Helena to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Helena to San Diego in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Helena-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Helena-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Helena-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Helena-San Diego flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Helena-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Helena to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego 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 Diego

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

Currently, August is the cheapest month in which you can book a flight from Helena to San Diego (average of $286). Flying from Helena to San Diego in March is currently the most expensive (average of $366). 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.

Rainfall in San Diego by month

Plan your trip to San Diego by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.

Temperature in San Diego by month

Plan your trip to San Diego by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 Diego. Reviews last updated abril 16, 2025.
Alaska Airlines
8.0
Very good
9,876 reviews

Crew

8.5

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,876 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Crew

8.5

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,916 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Crew

8.5

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,665 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Crew

8.5

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

Find useful and relevant information for your journey from Helena to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Helena to San Diego round-trip?

    Our cheapest airline available from Helena to San Diego is Delta. Our recent data shows that you can find tickets from as low as $409 on this airline. Additional options worth looking into are Alaska Airlines and United Airlines, starting at $410 and $454 round-trip. Delta is currently priced 22% below the average price you’ll pay for this route.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Helena to San Diego (average of $286). Flying from Helena to San Diego in March is currently the most expensive (average of $366). 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

Traveling to a place near Helena?

Book flights to Helena if you plan to visit one of these locations
El Cajon
Chula Vista
Lemon Grove
National City
Imperial Beach
La Mesa
Alpine
Poway
Santee
Coronado

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Top airline flying from Helena to San Diego

Discover the top airline that operate flights from Helena to San Diego. 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 abril 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$294Average$508FlexibilityNo cancel feeOn-timeN/A

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