$223+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — HLN
Aug 28 — Sep 41
Round-trip
1 adult, Economy
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Find cheap flights from San Diego to Helena with Cheapflights
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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
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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
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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 July 29, 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 July 29, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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.
Sat 11/146:15 am
SAN
- HLN
1 stop8h 49m
Alaska Airlines
Wed 11/184:41 pm
HLN
- SAN
1 stop7h 50m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$303
This Alaska Airlines deal was found by Cheapflights users on 7/26. 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 10/235:20 pm
SAN
- HLN
1 stop22h 29m
Alaska Airlines
Sun 10/255:26 pm
HLN
- SAN
1 stop20h 57m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$368
This Orbitz deal was found by Cheapflights users on 7/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/88:28 pm
SAN
- HLN
1 stop19h 21m
Alaska Airlines
Mon 10/125:26 pm
HLN
- SAN
1 stop19h 24m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$394
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 12/511:52 am
SAN
- HLN
1 stop26h 39m
Alaska Airlines
Wed 12/94:08 pm
HLN
- SAN
2 stops29h 18m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$450
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 July 29, 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 July 29, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/26. 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 11/146:15 am
SAN
- HLN
1 stop8h 49m
Alaska Airlines
Wed 11/184:41 pm
HLN
- SAN
1 stop7h 50m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 7/25. 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.
Thu 9/105:01 pm
SAN
- HLN
1 stop4h 23m
Delta
Sun 9/137:15 am
HLN
- SAN
1 stop6h 15m
Delta
Deal found 7/25![Delta logo]()
$561
This Orbitz deal was found by Cheapflights users on 7/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/88:28 pm
SAN
- HLN
1 stop19h 21m
Alaska Airlines
Mon 10/125:26 pm
HLN
- SAN
1 stop19h 24m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$394
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 12/51:45 pm
SAN
- HLN
1 stop24h 46m
Alaska Airlines
Wed 12/94:08 pm
HLN
- SAN
1 stop5h 48m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$463
This Alaska Airlines deal was found by Cheapflights users on 7/25. 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.
Thu 9/106:15 am
SAN
- HLN
1 stop9h 26m
Alaska Airlines
Sun 9/135:18 pm
HLN
- SAN
2 stops20h 17m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$626
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 8/1310:09 am
SAN
- HLN
1 stop5h 23m
Alaska Airlines
Mon 8/175:09 pm
HLN
- SAN
2 stops19h 49m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$688
Last-minute flights from San Diego to HelenaDiscover last-minute flight deals from San Diego to Helena. Data last updated July 29, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Helena. Data last updated July 29, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/27. 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.
Wed 8/55:01 pm
SAN
- HLN
1 stop18h 14m
Delta
Mon 8/1012:55 pm
HLN
- SAN
2 stops7h 24m
Delta
Deal found 7/27![Delta logo]()
$769
This Delta deal was found by Cheapflights users on 7/27. 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.
Wed 8/51:25 pm
SAN
- HLN
1 stop8h 05m
Delta
Sat 8/86:50 am
HLN
- SAN
1 stop17h 02m
Delta
Deal found 7/27![Delta logo]()
$813
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 8/610:09 am
SAN
- HLN
1 stop5h 23m
Alaska Airlines
Mon 8/105:09 pm
HLN
- SAN
1 stop7h 12m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$880
This United Airlines deal was found by Cheapflights users on 7/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:30 am
SAN
- HLN
1 stop6h 03m
United Airlines
Thu 8/132:35 pm
HLN
- SAN
1 stop6h 59m
United Airlines
Deal found 7/25![United Airlines logo]()
$715
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 8/1310:09 am
SAN
- HLN
1 stop5h 23m
Alaska Airlines
Mon 8/175:09 pm
HLN
- SAN
2 stops19h 49m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$688
This Delta deal was found by Cheapflights users on 7/28. 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.
Thu 8/135:01 pm
SAN
- HLN
1 stop4h 29m
Delta
Mon 8/175:40 am
HLN
- SAN
1 stop4h 01m
Delta
Deal found 7/28![Delta logo]()
$735
This United Airlines deal was found by Cheapflights users on 7/24. 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.
Fri 8/146:30 am
SAN
- HLN
1 stop6h 15m
United Airlines
Sun 8/166:15 am
HLN
- SAN
1 stop7h 26m
United Airlines
Deal found 7/24![United Airlines logo]()
$782
This Delta deal was found by Cheapflights users on 7/28. 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.
Fri 8/143:00 pm
SAN
- HLN
2 stops6h 30m
Delta
Sun 8/165:40 am
HLN
- SAN
2 stops10h 30m
Delta
Deal found 7/28![Delta logo]()
$848
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 July 29, 2026.
Search for one-way flight options from San Diego to Helena. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
This Priceline deal was found by Cheapflights users on 7/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:15 am
SAN
- HLN
1 stop8h 19m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$223
This Delta deal was found by Cheapflights users on 7/27. 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 9/105:01 pm
SAN
- HLN
1 stop4h 23m
Delta
Deal found 7/27![Delta logo]()
$233
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 9/246:55 am
SAN
- HLN
2 stops8h 46m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$264
This Delta deal was found by Cheapflights users on 7/27. 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.
Sat 8/226:29 am
SAN
- HLN
1 stop4h 46m
Delta
Deal found 7/27![Delta logo]()
$293
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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.
Fri 10/99:14 pm
SAN
- HLN
2 stops18h 35m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$295
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 9/109:16 pm
SAN
- HLN
2 stops42h 25m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$341
This United Airlines deal was found by Cheapflights users on 7/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:30 am
SAN
- HLN
1 stop6h 03m
United Airlines
Deal found 7/25![United Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/29:01 pm
SAN
- HLN
3 stops42h 33m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$511
This Priceline deal was found by Cheapflights users on 7/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:50 am
SAN
- HLN
2 stops8h 42m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$548
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/109:59 am
SAN
- HLN
3 stops29h 42m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$624
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 July 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $303 (Alaska Airlines) |
One-way from | $223 (Priceline) |
Popular in | December |
Cheapest in | September |
Average price | $618 |
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 July 29, 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 - HLN
SANHLN
San Diego
Sat 11/14
6:15 am-4:04 pm
1 stop8h 49m
Helena
Wed 11/18
4:41 pm-11:31 pm
1 stop7h 50m
$333
San DiegoHelena
SAN - HLN
SANHLN
San Diego
Thu 10/8
8:28 pm-4:49 pm
1 stop19h 21m
Helena
Mon 10/12
5:26 pm-11:50 am
1 stop19h 24m
$394
San DiegoHelena
SAN - HLN
SANHLN
San Diego
Sat 12/5
1:45 pm-3:31 pm
1 stop24h 46m
Helena
Wed 12/9
4:08 pm-8:56 pm
1 stop5h 48m
$463
Quickest round-trip
San DiegoHelena
SAN - HLN
SANHLN
San Diego
Thu 9/10
5:01 pm-10:24 pm
1 stop4h 23m
Helena
Sun 9/13
7:15 am-12:30 pm
1 stop6h 15m
$561
San DiegoHelena
SAN - HLN
SANHLN
San Diego
Thu 9/10
6:15 am-4:41 pm
1 stop9h 26m
Helena
Sun 9/13
5:18 pm-12:35 pm
2 stops20h 17m
$626
San DiegoHelena
SAN - HLN
SANHLN
San Diego
Thu 8/13
10:09 am-4:32 pm
1 stop5h 23m
Helena
Mon 8/17
5:09 pm-11:58 am
2 stops19h 49m
$688
Cheapest one-way
San DiegoHelena
SAN - HLN
SANHLN
San Diego
Thu 9/24
7:15 am-4:41 pm
1 stop8h 26m
$233
Quickest one-way
San DiegoHelena
SAN - HLN
SANHLN
San Diego
Thu 9/10
5:01 pm-10:24 pm
1 stop4h 23m
$233
San DiegoHelena
SAN - HLN
SANHLN
San Diego
Fri 10/9
5:01 pm-10:24 pm
1 stop4h 23m
$233
San DiegoHelena
SAN - HLN
SANHLN
San Diego
Sat 8/22
6:29 am-12:15 pm
1 stop4h 46m
$293
Showing 1-10 of 15 resultsSorted 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 July.
| 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 July 29, 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.
Comfort
7.8
Entertainment
7.8
Crew
8.5
Overall
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
Comfort
7.8
Entertainment
7.8
Crew
8.5
Overall
7.8
Boarding
8.1
Food
7.2
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 July 29, 2026.
San Diego and Helena flights
Browse other San Diego and Helena flight options. Last updated on July 29, 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 July 29, 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 2,558,603 searches. Data last updated July 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$328 | Average$528 | FlexibilityNo cancel fee | On-timeN/A |