$198+ Cheap flights from San Francisco to Helena (SFO - 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — HLN
Aug 22 — Aug 291
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Francisco 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 Francisco to Helena
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Francisco to HelenaExplore the most affordable flight options available from San Francisco to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.
Explore the most affordable flight options available from San Francisco to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/18. 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 10/216:00 am
SFO
- HLN
1 stop9h 11m
Alaska Airlines
Sat 10/244:48 pm
HLN
- SFO
1 stop7h 56m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$323
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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 9/177:00 am
SFO
- HLN
1 stop8h 41m
Alaska Airlines
Tue 9/225:18 pm
HLN
- SFO
1 stop17h 19m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$343
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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 9/176:00 am
SFO
- HLN
1 stop9h 41m
Alaska Airlines
Mon 9/215:18 pm
HLN
- SFO
1 stop20h 45m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$353
This Delta deal was found by Cheapflights users on 7/19. 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 9/1710:29 am
SFO
- HLN
2 stops24h 48m
Delta
Tue 9/2212:57 pm
HLN
- SFO
2 stops8h 21m
Delta
Deal found 7/19![Delta logo]()
$358
This Delta deal was found by Cheapflights users on 7/19. 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 9/185:45 am
SFO
- HLN
1 stop5h 32m
Delta
Tue 9/227:15 am
HLN
- SFO
1 stop6h 03m
Delta
Deal found 7/19![Delta logo]()
$375
This Delta deal was found by Cheapflights users on 7/22. 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 9/1710:29 am
SFO
- HLN
2 stops24h 48m
Delta
Mon 9/2112:57 pm
HLN
- SFO
2 stops29h 01m
Delta
Deal found 7/22![Delta logo]()
$378
This Delta deal was found by Cheapflights users on 7/22. 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 9/185:45 am
SFO
- HLN
1 stop5h 32m
Delta
Mon 9/2112:57 pm
HLN
- SFO
2 stops29h 01m
Delta
Deal found 7/22![Delta logo]()
$384
Best flights from San Francisco to HelenaDiscover carefully curated flight deals from San Francisco to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 23, 2026.
Discover carefully curated flight deals from San Francisco to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 23, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/18. 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 10/216:00 am
SFO
- HLN
1 stop9h 11m
Alaska Airlines
Sat 10/244:48 pm
HLN
- SFO
1 stop7h 56m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$323
This Delta deal was found by Cheapflights users on 7/19. 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 9/188:59 pm
SFO
- HLN
2 stops14h 18m
Delta
Tue 9/227:15 am
HLN
- SFO
1 stop6h 03m
Delta
Deal found 7/19![Delta logo]()
$364
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 9/177:00 am
SFO
- HLN
1 stop8h 41m
Alaska Airlines
Tue 9/225:18 pm
HLN
- SFO
1 stop17h 19m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 7/22. 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 9/1710:29 am
SFO
- HLN
2 stops24h 48m
Delta
Mon 9/2112:57 pm
HLN
- SFO
2 stops29h 01m
Delta
Deal found 7/22![Delta logo]()
$378
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 9/177:00 am
SFO
- HLN
1 stop8h 41m
Alaska Airlines
Mon 9/215:18 pm
HLN
- SFO
1 stop27h 41m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$358
This Delta deal was found by Cheapflights users on 7/19. 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 8/215:50 am
SFO
- HLN
1 stop5h 25m
Delta
Mon 8/245:40 am
HLN
- SFO
2 stops8h 51m
Delta
Deal found 7/19![Delta logo]()
$400
This Delta deal was found by Cheapflights users on 7/20. 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 8/185:08 pm
SFO
- HLN
1 stop4h 22m
Delta
Mon 8/245:40 am
HLN
- SFO
1 stop4h 10m
Delta
Deal found 7/20![Delta logo]()
$433
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 9/36:00 am
SFO
- HLN
1 stop9h 34m
Alaska Airlines
Tue 9/85:18 pm
HLN
- SFO
1 stop18h 41m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$443
This Delta deal was found by Cheapflights users on 7/18. 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 8/215:50 am
SFO
- HLN
1 stop5h 25m
Delta
Sun 8/235:40 am
HLN
- SFO
1 stop4h 10m
Delta
Deal found 7/18![Delta logo]()
$445
Last-minute flights from San Francisco to HelenaDiscover last-minute flight deals from San Francisco to Helena. Data last updated July 23, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Helena. Data last updated July 23, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/19. 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 8/95:50 am
SFO
- HLN
1 stop5h 25m
Delta
Tue 8/1112:55 pm
HLN
- SFO
1 stop4h 18m
Delta
Deal found 7/19![Delta logo]()
$471
This Delta deal was found by Cheapflights users on 7/20. 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 8/185:08 pm
SFO
- HLN
1 stop4h 22m
Delta
Mon 8/245:40 am
HLN
- SFO
1 stop4h 10m
Delta
Deal found 7/20![Delta logo]()
$433
This Trip.com deal was found by Cheapflights users on 7/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:03 am
SFO
- HLN
1 stop6h 31m
Alaska Airlines
Wed 8/265:11 pm
HLN
- SFO
1 stop5h 19m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$411
This Delta deal was found by Cheapflights users on 7/22. 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 8/195:50 am
SFO
- HLN
1 stop5h 25m
Delta
Wed 8/265:40 am
HLN
- SFO
2 stops6h 03m
Delta
Deal found 7/22![Delta logo]()
$428
This Delta deal was found by Cheapflights users on 7/19. 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 8/215:50 am
SFO
- HLN
1 stop5h 25m
Delta
Mon 8/245:40 am
HLN
- SFO
1 stop4h 10m
Delta
Deal found 7/19![Delta logo]()
$395
This Delta deal was found by Cheapflights users on 7/18. 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 8/215:50 am
SFO
- HLN
1 stop5h 25m
Delta
Sun 8/235:40 am
HLN
- SFO
1 stop4h 10m
Delta
Deal found 7/18![Delta logo]()
$445
One-way flights from San Francisco to HelenaSearch for one-way flight options from San Francisco to Helena. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.
Search for one-way flight options from San Francisco to Helena. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.
This Delta deal was found by Cheapflights users on 7/23. 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 9/185:45 am
SFO
- HLN
1 stop5h 32m
Delta
Deal found 7/23![Delta logo]()
$198
This Delta deal was found by Cheapflights users on 7/23. 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 9/1711:58 am
SFO
- HLN
2 stops9h 26m
Delta
Deal found 7/23![Delta logo]()
$203
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 12/108:15 am
SFO
- HLN
1 stop6h 16m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$236
This Delta deal was found by Cheapflights users on 7/22. 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 12/106:00 am
SFO
- HLN
1 stop5h 24m
Delta
Deal found 7/22![Delta logo]()
$241
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 9/189:13 pm
SFO
- HLN
2 stops18h 28m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$302
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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 9/1510:36 am
SFO
- HLN
1 stop5h 05m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 7/23. 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 9/175:00 am
SFO
- HLN
1 stop7h 45m
United Airlines
Deal found 7/23![United Airlines logo]()
$355
This Delta deal was found by Cheapflights users on 7/23. 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 8/75:50 am
SFO
- HLN
1 stop5h 25m
Delta
Deal found 7/23![Delta logo]()
$358
Find flight deals from San Francisco to Helena
Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) 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 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $323 (Alaska Airlines) |
One-way from | $198 (Delta) |
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco 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 23, 2026.
Use the filters below to find and compare flights from San Francisco to Helena that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Wed 10/21
6:00 am-4:11 pm
1 stop9h 11m
Helena
Sat 10/24
4:48 pm-11:44 pm
1 stop7h 56m
$323
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Thu 9/17
7:00 am-4:41 pm
1 stop8h 41m
Helena
Tue 9/22
5:18 pm-9:37 am
1 stop17h 19m
$348
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Thu 9/17
7:00 am-4:41 pm
1 stop8h 41m
Helena
Mon 9/21
5:18 pm-7:59 pm
1 stop27h 41m
$358
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Fri 9/18
8:59 pm-12:17 pm
2 stops14h 18m
Helena
Tue 9/22
7:15 am-12:18 pm
1 stop6h 03m
$364
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Thu 9/17
10:29 am-12:17 pm
2 stops24h 48m
Helena
Mon 9/21
12:57 pm-4:58 pm
2 stops29h 01m
$378
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Fri 8/21
5:50 am-12:15 pm
1 stop5h 25m
Helena
Mon 8/24
5:40 am-1:31 pm
2 stops8h 51m
$400
Quickest round-trip
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Tue 8/18
5:08 pm-10:30 pm
1 stop4h 22m
Helena
Mon 8/24
5:40 am-8:50 am
1 stop4h 10m
$433
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Thu 9/3
6:00 am-4:34 pm
1 stop9h 34m
Helena
Tue 9/8
5:18 pm-10:59 am
1 stop18h 41m
$443
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Fri 8/21
5:50 am-12:15 pm
1 stop5h 25m
Helena
Sun 8/23
5:40 am-8:50 am
1 stop4h 10m
$445
Cheapest one-way
San FranciscoHelena
SFO - HLN
SFOHLN
San Francisco
Fri 9/18
5:45 am-12:17 pm
1 stop5h 32m
$198
Showing 1-10 of 13 resultsSorted by cheapest first
Compare providers for flights from San Francisco 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 Francisco 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 Francisco-Helena flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Helena flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Helena flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Francisco-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 Francisco-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 Francisco to Helena
Have a flexible travel schedule? Discover the best time to fly to Helena from San Francisco with our price prediction graph.
SFO-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.
Related info for your journey
Find useful and relevant information for your journey from San Francisco to Helena. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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
Complete your trip
Flights by cabin class
Helena flight routes
Other flight options
Other flights from San Francisco
Popular flights