$283+ 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — HLN
Nov 29 — Dec 61
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
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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 October 30, 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 October 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 12/96:15 am -
1 stop8h 57m
Mon 12/144:49 pm -
1 stop21h 34m
Deal found 10/28![Alaska Airlines logo]()
$342
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 11/2612:13 pm -
1 stop27h 03m
Thu 12/34:49 pm -
1 stop7h 10m
Deal found 10/27![Alaska Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:20 am -
2 stops11h 08m
Thu 12/31:10 pm -
2 stops10h 42m
Deal found 10/27![Delta logo]()
$417
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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 11/106:29 pm -
2 stops20h 35m
Sat 11/144:41 pm -
2 stops18h 24m
Deal found 10/26![Alaska Airlines logo]()
$567
This Alaska Airlines deal was found by Cheapflights users on 10/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/148:12 pm -
2 stops18h 52m
Tue 11/174:41 pm -
2 stops28h 59m
Deal found 10/25![Alaska Airlines logo]()
$616
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 11/125:04 pm -
2 stops22h 00m
Mon 11/164:41 pm -
2 stops18h 24m
Deal found 10/28![Alaska Airlines logo]()
$646
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 October 30, 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 October 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 12/96:15 am -
1 stop8h 57m
Mon 12/144:49 pm -
1 stop21h 34m
Deal found 10/28![Alaska Airlines logo]()
$342
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 11/2612:13 pm -
1 stop27h 03m
Thu 12/34:49 pm -
1 stop7h 10m
Deal found 10/27![Alaska Airlines logo]()
$390
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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 11/106:29 pm -
2 stops20h 35m
Sat 11/144:41 pm -
2 stops18h 24m
Deal found 10/26![Alaska Airlines logo]()
$567
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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 3/125:51 pm -
1 stop20h 40m
Tue 3/164:08 pm -
1 stop5h 48m
Deal found 10/26![Alaska Airlines logo]()
$600
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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 3/124:50 pm -
1 stop21h 41m
Mon 3/154:08 pm -
2 stops30h 13m
Deal found 10/26![Alaska Airlines logo]()
$608
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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 -
2 stops15h 41m
Deal found 10/26![Alaska Airlines logo]()
$641
Last-minute flights from San Diego to HelenaDiscover last-minute flight deals from San Diego to Helena. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Helena. Data last updated October 30, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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 11/106:29 pm -
2 stops20h 35m
Sat 11/144:41 pm -
2 stops18h 24m
Deal found 10/26![Alaska Airlines logo]()
$567
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 11/125:04 pm -
2 stops22h 00m
Mon 11/164:41 pm -
2 stops18h 24m
Deal found 10/28![Alaska Airlines logo]()
$646
This Alaska Airlines deal was found by Cheapflights users on 10/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/148:12 pm -
2 stops18h 52m
Tue 11/174:41 pm -
2 stops28h 59m
Deal found 10/25![Alaska Airlines logo]()
$616
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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 11/165:04 pm -
2 stops22h 00m
Fri 11/204:53 pm -
2 stops15h 36m
Deal found 10/29![Alaska Airlines logo]()
$647
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 11/2612:13 pm -
1 stop27h 03m
Thu 12/34:49 pm -
1 stop7h 10m
Deal found 10/27![Alaska Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:20 am -
2 stops11h 08m
Thu 12/31:10 pm -
2 stops10h 42m
Deal found 10/27![Delta logo]()
$417
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 October 30, 2026.
Search for one-way flight options from San Diego to Helena. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Delta deal was found by Cheapflights users on 10/28. 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 1/176:15 am -
1 stop5h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Delta logo]()
$283
This deal was found by Cheapflights users on 10/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/226:45 am -
1 stop5h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![United Airlines logo]()
$363
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 1/186:20 pm -
2 stops21h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Alaska Airlines logo]()
$445
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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $342 (Alaska Airlines) |
One-way from | $283 (Delta) |
Popular in | December |
Cheapest in | January |
Average price | $549 |
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 October 30, 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
Quickest round-trip
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Sun 1/17
6:15 am-12:32 pm
1 stop5h 17m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$283
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Wed 12/9
6:15 am-4:12 pm
1 stop8h 57m
Helena
Mon 12/14
4:49 pm-1:23 pm
1 stop21h 34m
$342
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Mon 1/18
12:39 pm-9:32 pm
1 stop7h 53m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$363
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Sun 11/22
6:45 am-1:40 pm
1 stop5h 55m
Helena
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$363
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Thu 11/26
12:13 pm-4:16 pm
1 stop27h 03m
Helena
Thu 12/3
4:49 pm-10:59 pm
1 stop7h 10m
$390
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Tue 11/10
6:29 pm-4:04 pm
2 stops20h 35m
Helena
Sat 11/14
4:41 pm-10:05 am
2 stops18h 24m
$567
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Fri 3/12
5:51 pm-3:31 pm
1 stop20h 40m
Helena
Tue 3/16
4:08 pm-8:56 pm
1 stop5h 48m
$600
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Fri 3/12
4:50 pm-3:31 pm
1 stop21h 41m
Helena
Mon 3/15
4:08 pm-9:21 pm
2 stops30h 13m
$608
San DiegoHelena
SAN San Diego - HLN Helena
SANHLN
San Diego
Sat 11/14
9:15 am-4:04 pm
1 stop5h 49m
Helena
Tue 11/17
4:41 pm-7:22 am
2 stops15h 41m
$641
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 October.
| 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 October 30, 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.
Food
7.2
Overall
7.8
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
Food
7.2
Overall
7.8
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Crew
8.5
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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Find flights from San Diego to Helena, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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 October 30, 2026.
San Diego and Helena flights
Browse other San Diego and Helena flight options. Last updated on October 30, 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 October 30, 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 October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$387 | Average$549 | FlexibilityNo cancel fee | On-timeN/A |