HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Helena

$165+ 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 7/16. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — HLN
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Diego to Helena with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 junio 12, 2025.

Round-trip from

$267
(Delta)

One-way from

$165
(Delta)

Popular in

June

Cheapest in

July

Average price

$749
From San Diego to Helena
Search Deals
One-way flight from San Diego to Helena
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find 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 junio 12, 2025.

This Delta deal was found by Cheapflights users on 6/11. 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.
mié. 9/246:15 amSAN - HLN
1 stop5h 09mDelta
mar. 9/305:40 amHLN - SAN
1 stop4h 24mDelta
Deal found 6/11$267
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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.
mié. 9/247:15 amSAN - HLN
1 stop7h 06mAlaska Airlines
mar. 9/304:02 pmHLN - SAN
2 stops16h 39mAlaska Airlines
Deal found 6/11$295
This United Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 7/27:27 pmSAN - HLN
3 stops20h 28mUnited Airlines
mar. 7/85:39 pmHLN - SAN
1 stop5h 35mUnited Airlines
Deal found 6/10$592
This Hawaiian Airlines deal was found by Cheapflights users on 6/10. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/26:15 amSAN - HLN
1 stop8h 16mHawaiian Airlines
mar. 7/84:09 pmHLN - SAN
1 stop7h 46mHawaiian Airlines
Deal found 6/10$619

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 junio 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

mié. 9/24

6:15 am-12:24 pm

1 stop5h 09m

Helena

mar. 9/30

5:40 am-9:04 am

1 stop4h 24m

$267

San DiegoHelena

SAN - HLN

SANHLN

San Diego

mié. 9/24

7:15 am-3:21 pm

1 stop7h 06m

Helena

mar. 9/30

4:02 pm-7:41 am

2 stops16h 39m

$295

San DiegoHelena

SAN - HLN

SANHLN

San Diego

mié. 7/2

7:27 pm-4:55 pm

3 stops20h 28m

Helena

mar. 7/8

5:39 pm-10:14 pm

1 stop5h 35m

$592

San DiegoHelena

SAN - HLN

SANHLN

San Diego

mié. 7/2

6:15 am-3:31 pm

1 stop8h 16m

Helena

mar. 7/8

4:09 pm-10:55 pm

1 stop7h 46m

$619

San DiegoHelena

SAN - HLN

SANHLN

San Diego

mié. 7/16

5:00 pm-10:47 pm

1 stop4h 47m

$165

San DiegoHelena

SAN - HLN

SANHLN

San Diego

lun. 7/14

8:10 am-3:31 pm

2 stops30h 21m

$300

San DiegoHelena

SAN - HLN

SANHLN

San Diego

lun. 7/14

5:50 pm-9:15 pm

3 stops26h 25m

$444

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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, February is the cheapest month in which you can book a flight from San Diego to Helena (average of $353). Flying from San Diego to Helena in July is currently the most expensive (average of $555). 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 Helena by month

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

In terms of precipitation, rainfall in Helena ranges from 0.3 - 2.1 inches per month. June is typically the wettest month, when rainfall can reach 2.1 in. February is typically the driest time to visit Helena when rainfall is around 0.3 in.

Temperature in Helena by month

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

If weather is an important factor for your trip to Helena, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 21.2 F).

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 junio 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $267. Additional round-trip tickets that might be worth considering are offered by Alaska Airlines and United Airlines, with the lowest prices starting at $295 and $592, respectively. Users have found that Delta is 37% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from San Diego to Helena one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $165. Users have also found prices from $300 and $444 on Alaska Airlines and United Airlines, respectively.

  • 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, February is the cheapest month in which you can book a flight from San Diego to Helena (average of $353). Flying from San Diego to Helena in July is currently the most expensive (average of $555). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Diego to Helena

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Bozeman flights
Los Angeles to Bozeman flights
Los Angeles to Kalispell flights
San Francisco to Kalispell flights
San Diego to Kalispell flights
San Francisco to Missoula flights
Los Angeles to Missoula flights
Ontario to Bozeman flights
San Diego to Bozeman flights
Ontario to Kalispell flights
Sacramento to Bozeman flights
San Diego to Missoula flights
Ontario to Missoula flights
San Jose to Kalispell flights
Santa Ana to Missoula flights
Santa Ana to Kalispell flights
Santa Ana to Bozeman flights
Los Angeles to Billings flights
San Francisco to West Yellowstone flights
Sacramento to Kalispell flights
Las Vegas to Bozeman flights
San Jose to Bozeman flights
Oakland to Kalispell flights
Burbank to Missoula flights
Oakland to Bozeman flights
Burbank to Kalispell flights
Fresno to Bozeman flights
Los Angeles to Helena flights
Oakland to Missoula flights
San Jose to Missoula flights
Sacramento to Missoula flights
San Francisco to Helena flights
San Francisco to Billings flights
Ontario to Billings flights
San Diego to Great Falls flights
San Jose to West Yellowstone flights
Las Vegas to Kalispell flights
Medford to Kalispell flights
Burbank to Bozeman flights
Sacramento to Helena flights
Reno to Billings flights
Fresno to Kalispell flights
Palm Springs to Bozeman flights
San Diego to Billings flights
Santa Barbara to Bozeman flights
Fresno to Missoula flights
Los Angeles to Great Falls flights
Medford to Billings flights
Santa Ana to West Yellowstone flights
Los Angeles to Butte flights

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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$219Average$397FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$293Average$351FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.