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Helena

$161+ Cheap flights from San Diego to Helena (SAN - 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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — HLN
Apr 13 — Apr 201
Mon 4/13
Mon 4/20
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 March 14, 2026.

This Alaska Airlines deal was found by Cheapflights users on 3/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:35 pm
SAN
-
HLN
1 stop21h 10m
Alaska Airlines
Sat 5/26:22 pm
HLN
-
SAN
1 stop20h 05m
Alaska Airlines
Deal found 3/11$234
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 4/2910:01 pm
SAN
-
HLN
2 stops18h 44m
Alaska Airlines
Sat 5/26:22 pm
HLN
-
SAN
1 stop20h 05m
Alaska Airlines
Deal found 3/12$312
This Alaska Airlines deal was found by Cheapflights users on 3/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:15 am
SAN
-
HLN
1 stop10h 30m
Alaska Airlines
Sun 4/126:22 pm
HLN
-
SAN
1 stop6h 37m
Alaska Airlines
Deal found 3/10$321
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Thu 4/96:32 am
SAN
-
HLN
1 stop6h 07m
United Airlines
Sun 4/122:25 pm
HLN
-
SAN
1 stop7h 57m
United Airlines
Deal found 3/9$341

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 March 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$234
(Alaska Airlines)

One-way from

$161
(Delta)

Popular in

June

Cheapest in

July

Average price

$490
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
One-way flight from San Diego to Helena
Search Deals
High demand for flights, 5% potential price rise
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 14, 2026.
Use the filters below to find and compare flights from San Diego to Helena that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 4/28

7:35 pm-5:45 pm

1 stop21h 10m

Helena

Sat 5/2

6:22 pm-1:27 pm

1 stop20h 05m

$245

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 4/9

6:32 am-1:39 pm

1 stop6h 07m

Helena

Sun 4/12

2:25 pm-9:22 pm

1 stop7h 57m

$341
Quickest round-trip

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Wed 6/24

6:15 am-12:23 pm

1 stop5h 08m

Helena

Mon 6/29

5:45 am-8:59 am

1 stop4h 14m

$409

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 6/16

10:02 pm-4:49 pm

2 stops17h 47m

Helena

Fri 6/19

5:26 pm-11:59 pm

1 stop7h 33m

$417

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 4/7

12:44 pm-5:45 pm

1 stop28h 01m

Helena

Thu 4/9

6:22 pm-7:56 am

2 stops14h 34m

$428

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Wed 6/24

8:15 pm-4:49 pm

2 stops19h 34m

Helena

Mon 6/29

5:26 pm-8:04 am

2 stops15h 38m

$449
Cheapest one-way
Quickest one-way

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 4/9

6:15 am-12:21 pm

1 stop5h 06m

$161

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 4/9

6:15 am-5:45 pm

1 stop10h 30m

$166

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Sun 4/19

6:32 am-1:39 pm

1 stop6h 07m

$196

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 7/10

6:15 am-12:23 pm

1 stop5h 08m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Diego-Helena flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 March 14, 2026.
See what other customers who have flown with 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.
Delta
7.9
Good
8,291 reviews

Crew

8.5

Overall

7.9

Food

7.2

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
7.9
Good
8,291 reviews
Delta
7.9
Good
8,291 reviews

Crew

8.5

Overall

7.9

Food

7.2

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

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 and United Airlines fly from San Diego to Helena in about 6h 07m. The time it takes to get you to your destination can typically vary by up to 15h 03m. The distance between San Diego and Helena is about 997 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Flying on Delta is currently your cheapest option to Helena, with prices starting at $219. Users have found that Delta is 47% 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.

See more FAQs

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Top airline flying from San Diego to Helena

Discover the top airline 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 March 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$219Average$368FlexibilityNo cancel feeOn-timeN/A

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