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Helena

$264+ Cheap flights from San Diego to Helena (SAN - HLN)

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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — HLN
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from San Diego to Helena

Cheapest flights from San Diego to Helena
Explore the most affordable flight options available from San Diego to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/11. 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.
Sat 12/276:30 amSAN - HLN
1 stop6h 15mUnited Airlines
Wed 12/316:10 amHLN - SAN
1 stop28h 29mUnited Airlines
Deal found 12/11$564
This Delta deal was found by Cheapflights users on 12/11. 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 12/206:15 amSAN - HLN
1 stop5h 15mDelta
Thu 1/81:10 pmHLN - SAN
1 stop4h 26mDelta
Deal found 12/11$609
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/256:30 amSAN - HLN
1 stop6h 15mUnited Airlines
Wed 12/316:10 amHLN - SAN
1 stop15h 37mUnited Airlines
Deal found 12/10$623
This Alaska Airlines deal was found by Cheapflights users on 12/9. 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 12/309:24 pmSAN - HLN
1 stop19h 31mAlaska Airlines
Sun 1/46:32 pmHLN - SAN
1 stop15h 53mAlaska Airlines
Deal found 12/9$644
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Sat 12/206:30 amSAN - HLN
1 stop6h 15mUnited Airlines
Thu 1/86:15 amHLN - SAN
2 stops33h 37mUnited Airlines
Deal found 12/11$672
This Delta deal was found by Cheapflights users on 12/9. 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 12/255:03 pmSAN - HLN
1 stop4h 27mDelta
Wed 12/315:30 amHLN - SAN
1 stop6h 05mDelta
Deal found 12/9$699
This United Airlines deal was found by Cheapflights users on 12/9. 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 12/295:40 pmSAN - HLN
2 stops26h 51mUnited Airlines
Fri 1/26:10 amHLN - SAN
1 stop28h 29mUnited Airlines
Deal found 12/9$780
This Alaska Airlines deal was found by Cheapflights users on 12/9. 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 12/2910:10 pmSAN - HLN
2 stops18h 45mAlaska Airlines
Fri 1/26:32 pmHLN - SAN
2 stops15h 03mAlaska Airlines
Deal found 12/9$789

Find flight deals from San Diego to Helena

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$264
(Alaska Airlines)

Popular in

June

Cheapest in

July

Average price

$373
Provider with most accurate pricing for San Diego-Helena flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Diego-Helena flights.
Search Deals
From San Diego to Helena
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego 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 December 12, 2025.
Use the filters below to find and compare flights from San Diego to Helena that are best for you.

Fly from

San Diego

Fly to

Helena

Route

Depart

Return

Price

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Sat 1/31

6:15 am-6:11 pm

1 stop10h 56m

Helena

Tue 2/3

6:48 pm-10:07 am

1 stop16h 19m

$264

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Sat 1/31

6:15 am-6:11 pm

1 stop10h 56m

Helena

Sun 2/8

6:48 pm-7:19 pm

1 stop25h 31m

$275

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Sat 12/27

6:30 am-1:45 pm

1 stop6h 15m

Helena

Wed 12/31

6:10 am-9:39 am

1 stop28h 29m

$564

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Sat 12/20

6:30 am-1:45 pm

1 stop6h 15m

$430

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Compare providers for flights from San Diego to Helena

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 San Diego to Helena in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 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 San Diego-Helena flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Diego-Helena flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Diego-Helena flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Diego-Helena flights, Cheapflights users trust eDreams the most. eDreams 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 San Diego-Helena 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 San Diego to Helena

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

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

Currently, May is the cheapest month in which you can book a flight from San Diego to Helena (average of $90). Flying from San Diego to Helena in December is currently the most expensive (average of $204). 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 Helena

Get insights into the airlines that provide service to Helena. 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 Helena. Reviews last updated December 12, 2025.
See what other customers who have flown with Alaska Airlines and Delta from San Diego to Helena have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,429 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Alaska Airlines
8.0
Very good
11,429 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Delta
7.9
Good
8,008 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.

Related info for your journey

Find useful and relevant information for your journey from San Diego 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 Diego to Helena?

    Airlines like Alaska Airlines fly from San Diego to Helena in about 10h 56m. The time it takes to get you to your destination can typically vary by up to . The distance between San Diego and Helena is about 997 mi.

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

    Flying on Delta is currently your cheapest option to Helena, with prices starting at $158. Another option worth looking into is Alaska Airlines, starting at $312 round trip. Users have found that Delta is 60% cheaper than the other options available to this destination.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from San Diego to Helena (average of $90). Flying from San Diego to Helena in December is currently the most expensive (average of $204). 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.

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Top 2 airlines flying from San Diego to Helena

Discover the top 2 airlines that operate flights from San Diego to Helena. 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$219Average$328FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$312Average$363FlexibilityNo cancel feeOn-time75%

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