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Helena

$109+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — HLN
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
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 January 27, 2026.

This Delta deal was found by Cheapflights users on 1/25. 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.
Wed 4/16:15 am
SAN
-
HLN
1 stop5h 06m
Delta
Sun 4/55:30 am
HLN
-
SAN
1 stop4h 15m
Delta
Deal found 1/25$325
This Trip.com deal was found by Cheapflights users on 1/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/136:15 am
SAN
-
HLN
1 stop8h 44m
Multiple Airlines
Fri 3/206:22 pm
HLN
-
SAN
1 stop6h 36m
Multiple Airlines
Deal found 1/27$330
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 4/110:48 am
SAN
-
HLN
1 stop5h 57m
Alaska Airlines
Sat 4/46:22 pm
HLN
-
SAN
2 stops14h 34m
Alaska Airlines
Deal found 1/27$341
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 3/308:05 pm
SAN
-
HLN
2 stops20h 40m
Alaska Airlines
Fri 4/36:22 pm
HLN
-
SAN
2 stops14h 34m
Alaska Airlines
Deal found 1/27$353
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 3/138:39 am
SAN
-
HLN
1 stop6h 20m
Alaska Airlines
Fri 3/206:22 pm
HLN
-
SAN
2 stops15h 57m
Alaska Airlines
Deal found 1/27$362
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 3/278:43 pm
SAN
-
HLN
1 stop20h 02m
Alaska Airlines
Wed 4/16:22 pm
HLN
-
SAN
1 stop23h 34m
Alaska Airlines
Deal found 1/27$368
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 3/308:43 pm
SAN
-
HLN
1 stop20h 02m
Alaska Airlines
Wed 4/16:22 pm
HLN
-
SAN
2 stops14h 23m
Alaska Airlines
Deal found 1/27$377
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 3/308:43 pm
SAN
-
HLN
1 stop20h 02m
Alaska Airlines
Sat 4/46:22 pm
HLN
-
SAN
2 stops14h 34m
Alaska Airlines
Deal found 1/27$378
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 3/319:03 pm
SAN
-
HLN
2 stops19h 42m
Alaska Airlines
Sat 4/46:22 pm
HLN
-
SAN
2 stops14h 34m
Alaska Airlines
Deal found 1/27$379
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 4/110:48 am
SAN
-
HLN
1 stop5h 57m
Alaska Airlines
Fri 4/36:22 pm
HLN
-
SAN
2 stops14h 34m
Alaska Airlines
Deal found 1/27$382

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$325
(Delta)

One-way from

$109
(Alaska Airlines)

Popular in

June

Cheapest in

July

Average price

$398
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
Highest demand for flights based on searches. 2% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 27, 2026.
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

Wed 4/1

6:15 am-12:21 pm

1 stop5h 06m

Helena

Sun 4/5

5:30 am-8:45 am

1 stop4h 15m

$325

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 3/27

8:43 pm-5:45 pm

1 stop20h 02m

Helena

Wed 4/1

6:22 pm-4:56 pm

1 stop23h 34m

$368

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Mon 3/30

8:43 pm-5:45 pm

1 stop20h 02m

Helena

Wed 4/1

6:22 pm-7:45 am

2 stops14h 23m

$377

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Mon 3/30

8:43 pm-5:45 pm

1 stop20h 02m

Helena

Sat 4/4

6:22 pm-7:56 am

2 stops14h 34m

$378

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 3/31

9:03 pm-5:45 pm

2 stops19h 42m

Helena

Sat 4/4

6:22 pm-7:56 am

2 stops14h 34m

$379

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 3/31

5:52 pm-5:45 pm

1 stop22h 53m

Helena

Sun 4/5

6:22 pm-7:56 am

2 stops14h 34m

$382

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Wed 4/1

6:15 am-5:45 pm

1 stop10h 30m

Helena

Sun 4/5

6:22 pm-7:56 am

2 stops14h 34m

$382

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 3/31

6:15 am-12:21 pm

1 stop5h 06m

Helena

Fri 4/3

5:30 am-8:45 am

1 stop4h 15m

$389

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Wed 4/1

6:15 am-12:21 pm

1 stop5h 06m

Helena

Fri 4/3

5:30 am-8:45 am

1 stop4h 15m

$389

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 3/31

6:15 am-12:21 pm

1 stop5h 06m

Helena

Sun 4/5

5:30 am-8:45 am

1 stop4h 15m

$389

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 15 results
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 January.
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 January 27, 2026.
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
11,799 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,799 reviews
Alaska Airlines
8.0
Very good
11,799 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,121 reviews
Alaska Airlines
8.0
Very good
11,799 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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 Delta and Alaska Airlines fly from San Diego to Helena in about 5h 06m. The time it takes to get you to your destination can typically vary by up to 14h 56m. 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 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 62% 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 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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$158Average$328FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$312Average$363FlexibilityNo cancel feeOn-time75%

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