$237+ Cheap flights from Helena to San Diego (HLN - SAN)
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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SAN
Oct 30 — Nov 61
Round-trip
1 adult, Economy
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Find cheap flights from Helena to San Diego 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 Helena to San Diego
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Best
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Cheapest flights from Helena to San DiegoExplore the most affordable flight options available from Helena to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 30, 2026.
Explore the most affordable flight options available from Helena to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/29. 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.
Sat 12/54:49 pm -
1 stop5h 28m
Wed 12/96:15 am -
1 stop8h 57m
Deal found 9/29![Alaska Airlines logo]()
$353
This Alaska Airlines deal was found by Cheapflights users on 9/26. 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 10/315:21 pm -
1 stop18h 52m
Mon 11/97:45 pm -
1 stop19h 19m
Deal found 9/26![Alaska Airlines logo]()
$403
This Delta deal was found by Cheapflights users on 9/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:08 pm -
2 stops10h 43m
Mon 11/96:30 am -
1 stop4h 57m
Deal found 9/26![Delta logo]()
$484
This Alaska Airlines deal was found by Cheapflights users on 9/27. 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 10/265:26 pm -
2 stops20h 48m
Fri 10/307:27 pm -
1 stop20h 17m
Deal found 9/27![Alaska Airlines logo]()
$539
This Expedia deal was found by Cheapflights users on 9/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:26 pm -
1 stop5h 32m
Fri 10/239:29 pm -
2 stops18h 20m
Deal found 9/26![Alaska Airlines logo]()
$561
Best flights from Helena to San DiegoDiscover carefully curated flight deals from Helena to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 30, 2026.
Discover carefully curated flight deals from Helena to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/29. 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.
Sat 12/54:49 pm -
1 stop5h 28m
Wed 12/96:15 am -
1 stop8h 57m
Deal found 9/29![Alaska Airlines logo]()
$353
This Delta deal was found by Cheapflights users on 9/28. 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 11/11:08 pm -
2 stops7h 06m
Tue 11/33:00 pm -
2 stops6h 24m
Deal found 9/28![Delta logo]()
$592
This Alaska Airlines deal was found by Cheapflights users on 9/28. 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 10/265:26 pm -
1 stop17h 40m
Mon 11/28:06 am -
2 stops30h 58m
Deal found 9/28![Alaska Airlines logo]()
$561
This Alaska Airlines deal was found by Cheapflights users on 9/26. 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.
Mon 10/195:26 pm -
1 stop6h 32m
Fri 10/235:20 pm -
1 stop22h 29m
Deal found 9/26![Alaska Airlines logo]()
$563
This Alaska Airlines deal was found by Cheapflights users on 9/27. 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 10/265:26 pm -
2 stops18h 56m
Thu 10/298:07 am -
2 stops7h 42m
Deal found 9/27![Alaska Airlines logo]()
$569
This Alaska Airlines deal was found by Cheapflights users on 9/29. 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.
Fri 10/235:26 pm -
1 stop27h 17m
Tue 10/279:20 am -
1 stop6h 29m
Deal found 9/29![Alaska Airlines logo]()
$588
Last-minute flights from Helena to San DiegoDiscover last-minute flight deals from Helena to San Diego. Data last updated September 30, 2026 and is based on user searches.
Discover last-minute flight deals from Helena to San Diego. Data last updated September 30, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 9/26. 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 10/175:26 pm -
1 stop7h 00m
Sun 10/256:15 am -
1 stop9h 34m
Deal found 9/26![Alaska Airlines logo]()
$583
This Expedia deal was found by Cheapflights users on 9/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:26 pm -
1 stop5h 32m
Fri 10/239:29 pm -
2 stops18h 20m
Deal found 9/26![Alaska Airlines logo]()
$561
This Alaska Airlines deal was found by Cheapflights users on 9/29. 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.
Fri 10/235:26 pm -
1 stop27h 17m
Tue 10/279:20 am -
1 stop6h 29m
Deal found 9/29![Alaska Airlines logo]()
$588
This Alaska Airlines deal was found by Cheapflights users on 9/27. 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 10/265:26 pm -
2 stops20h 48m
Fri 10/307:27 pm -
1 stop20h 17m
Deal found 9/27![Alaska Airlines logo]()
$539
This Alaska Airlines deal was found by Cheapflights users on 9/28. 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 10/265:26 pm -
1 stop25h 26m
Mon 11/27:45 pm -
1 stop19h 19m
Deal found 9/28![Alaska Airlines logo]()
$568
This Alaska Airlines deal was found by Cheapflights users on 9/27. 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 10/265:26 pm -
2 stops18h 56m
Thu 10/298:07 am -
2 stops7h 42m
Deal found 9/27![Alaska Airlines logo]()
$569
This Alaska Airlines deal was found by Cheapflights users on 9/26. 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 10/315:21 pm -
1 stop18h 52m
Mon 11/97:45 pm -
1 stop19h 19m
Deal found 9/26![Alaska Airlines logo]()
$403
This Delta deal was found by Cheapflights users on 9/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:08 pm -
2 stops10h 43m
Mon 11/96:30 am -
1 stop4h 57m
Deal found 9/26![Delta logo]()
$484
One-way flights from Helena to San DiegoSearch for one-way flight options from Helena to San Diego. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
Search for one-way flight options from Helena to San Diego. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
This Priceline deal was found by Cheapflights users on 9/30. 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 2/35:00 pm -
1 stop5h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Alaska Airlines logo]()
$237
This United Airlines deal was found by Cheapflights users on 9/30. 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 12/62:35 pm -
1 stop7h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![United Airlines logo]()
$273
This Delta deal was found by Cheapflights users on 9/30. 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 12/61:10 pm -
2 stops10h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Delta logo]()
$278
This Delta deal was found by Cheapflights users on 9/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/21:05 pm -
1 stop6h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Delta logo]()
$293
This Delta deal was found by Cheapflights users on 9/27. 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.
Fri 10/161:08 pm -
1 stop6h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Delta logo]()
$373
This Alaska Airlines deal was found by Cheapflights users on 9/30. 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 10/135:26 pm -
2 stops24h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Alaska Airlines logo]()
$382
This Alaska Airlines deal was found by Cheapflights users on 9/30. 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 10/145:26 pm -
1 stop7h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Alaska Airlines logo]()
$403
This Alaska Airlines deal was found by Cheapflights users on 9/28. 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 10/75:26 pm -
2 stops22h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Alaska Airlines logo]()
$420
This United Airlines deal was found by Cheapflights users on 9/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/82:30 pm -
1 stop7h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![United Airlines logo]()
$493
Find flight deals from Helena to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to San Diego (SAN). 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 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $353 (Alaska Airlines) |
One-way from | $293 (Delta) |
Cheapflights Fare Finder
Customize your flight search to find flights from Helena to San Diego 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 30, 2026.
Use the filters below to find and compare flights from Helena to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Wed 2/3
5:00 pm-8:13 pm
2 stops28h 13m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$255
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sun 12/6
2:35 pm-8:41 pm
1 stop7h 06m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$273
Quickest round-trip
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 1/2
1:05 pm-6:05 pm
1 stop6h 00m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$293
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 12/5
4:49 pm-9:17 pm
1 stop5h 28m
San Diego
Wed 12/9
6:15 am-4:12 pm
1 stop8h 57m
$353
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Fri 10/16
5:26 pm-11:59 pm
1 stop7h 33m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$373
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Fri 10/16
1:08 pm-10:51 pm
2 stops10h 43m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$378
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Fri 10/16
2:30 pm-12:31 am
2 stops11h 01m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$378
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Tue 10/13
5:26 pm-4:40 pm
2 stops24h 14m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$382
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Wed 10/7
5:26 pm-3:19 pm
2 stops22h 53m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$420
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Wed 10/7
6:25 am-12:55 pm
1 stop7h 30m
San Diego
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$493
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from Helena to San Diego
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 Helena to San Diego 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 Helena-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Helena-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Helena-San Diego flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Helena-San Diego 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 Helena-San Diego 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 Helena to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Helena with our price prediction graph.
HLN-SAN
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 San Diego
Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated September 30, 2026.
Get a feel of what it's like to fly with Delta from Helena to San Diego by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.8
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Boarding
8.1
Food
7.2
Overall
7.8
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Related info for your journey
Find useful and relevant information for your journey from Helena to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
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Julian
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Lemon Grove
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Helena and San Diego flights
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Top airline flying from Helena to San Diego
Discover the top airline that operate flights from Helena to San Diego. 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 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$306 | Average$417 | FlexibilityNo cancel fee | On-timeN/A |