$364+ 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 11/30. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — HLN
Oct 17 — Oct 241
Round-trip
1 adult, Economy
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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
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Diego to HelenaExplore 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 September 17, 2026.
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 September 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 11/149:15 am -
1 stop5h 49m
Tue 11/174:41 pm -
1 stop27h 06m
Deal found 9/15![Alaska Airlines logo]()
$403
This Delta deal was found by Cheapflights users on 9/16. 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.
Thu 12/245:05 pm -
1 stop4h 21m
Mon 12/281:05 pm -
1 stop6h 00m
Deal found 9/16![Delta logo]()
$545
This Expedia deal was found by Cheapflights users on 9/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/266:15 am -
1 stop8h 26m
Thu 12/314:18 pm -
1 stop7h 43m
Deal found 9/13![Alaska Airlines logo]()
$597
Best flights from San Diego to HelenaDiscover carefully curated flight deals from San Diego to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
Discover carefully curated flight deals from San Diego to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 11/146:15 am -
1 stop8h 49m
Tue 11/174:41 pm -
1 stop23h 06m
Deal found 9/16![Alaska Airlines logo]()
$403
Last-minute flights from San Diego to HelenaDiscover last-minute flight deals from San Diego to Helena. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Helena. Data last updated September 17, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 9/297:15 am -
1 stop8h 26m
Sat 10/35:26 pm -
2 stops18h 56m
Deal found 9/14![Alaska Airlines logo]()
$717
This Delta deal was found by Cheapflights users on 9/15. 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.
Tue 10/66:15 am -
1 stop5h 13m
Fri 10/97:15 am -
2 stops8h 55m
Deal found 9/15![Delta logo]()
$760
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 10/87:50 am -
2 stops7h 59m
Mon 10/125:26 pm -
2 stops20h 48m
Deal found 9/14![Alaska Airlines logo]()
$627
This Delta deal was found by Cheapflights users on 9/14. 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 10/86:15 am -
1 stop5h 13m
Mon 10/127:15 am -
1 stop6h 10m
Deal found 9/14![Delta logo]()
$632
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/812:37 pm -
1 stop7h 31m
Mon 10/122:30 pm -
1 stop7h 09m
Deal found 9/14![United Airlines logo]()
$753
One-way flights from San Diego to HelenaSearch for one-way flight options from San Diego to Helena. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
Search for one-way flight options from San Diego to Helena. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/13. 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.
Sun 10/188:28 pm -
1 stop19h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Alaska Airlines logo]()
$403
This Alaska Airlines deal was found by Cheapflights users on 9/12. 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.
Sun 11/298:37 pm -
2 stops18h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Alaska Airlines logo]()
$534
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/291:30 pm -
3 stops25h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$564
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/189:29 pm -
3 stops42h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$648
This Delta deal was found by Cheapflights users on 9/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/295:13 pm -
1 stop4h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Delta logo]()
$700
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 September 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $403 (Alaska Airlines) |
One-way from | $403 (Alaska Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $597 |
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 7,457,451 searches. Data last updated September 17, 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
Cheapest round-trip
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Mon 11/30
3:46 pm-3:31 pm
2 stops22h 45m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$364
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Sun 10/18
8:28 pm-4:49 pm
1 stop19h 21m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$403
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Sat 11/14
6:15 am-4:04 pm
1 stop8h 49m
Helena
Tue 11/17
4:41 pm-2:47 pm
1 stop23h 06m
$403
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Mon 11/30
6:45 am-1:40 pm
1 stop5h 55m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$440
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Sun 11/29
8:37 pm-4:26 pm
2 stops18h 49m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$534
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Sun 11/29
1:30 pm-4:26 pm
3 stops25h 56m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$564
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Sun 10/18
9:29 pm-4:49 pm
3 stops42h 20m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$648
Quickest round-trip
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Sun 11/29
5:13 pm-10:26 pm
1 stop4h 13m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$700
Sorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
SAN-HLN
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.
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 September 17, 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.
Overall
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
Overall
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
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.
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Complete your trip
Complete your trip to Helena by adding a car rental and/or hotel reservation to your travel itinerary.
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Other flights to Helena
Explore flights to Helena departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 17, 2026.
San Diego and Helena flights
Browse other San Diego and Helena flight options. Last updated on September 17, 2026.
Other flights from San Diego
Browse through other flights departing from San Diego. Flights are based on user searches made on Cheapflights and were last updated on September 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated September 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$330 | Average$528 | FlexibilityNo cancel fee | On-timeN/A |