$399+ Cheap flights from Helena (HLN) to South Dakota
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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — FSD
Oct 13 — Oct 201
Round-trip
1 adult, Economy
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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
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Best
Last-minute
Cheapest flights from Helena to South DakotaExplore the most affordable flight options available from Helena to South Dakota. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2026.
Explore the most affordable flight options available from Helena to South Dakota. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2026.
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Sat 9/266:25 am -
1 stop5h 24m
Wed 9/305:04 pm -
1 stop5h 14m
Deal found 9/11![United Airlines logo]()
$509
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/186:15 am -
1 stop5h 24m
Mon 9/219:35 am -
1 stop5h 10m
Deal found 9/9![United Airlines logo]()
$583
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:25 am -
1 stop16h 19m
Tue 11/35:06 pm -
1 stop5h 25m
Deal found 9/12![United Airlines logo]()
$588
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/186:15 am -
1 stop5h 24m
Sun 9/205:05 pm -
1 stop5h 25m
Deal found 9/9![United Airlines logo]()
$626
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/186:15 am -
2 stops15h 57m
Sat 9/195:15 pm -
1 stop5h 15m
Deal found 9/10![United Airlines logo]()
$738
This Delta deal was found by Cheapflights users on 9/9. 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 9/187:15 am -
2 stops14h 36m
Sun 9/208:23 am -
2 stops15h 01m
Deal found 9/9![Delta logo]()
$822
This Delta deal was found by Cheapflights users on 9/9. 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 9/187:15 am -
2 stops14h 36m
Sat 9/1910:40 am -
2 stops12h 49m
Deal found 9/9![Delta logo]()
$889
Best flights from Helena to South DakotaDiscover carefully curated flight deals from Helena to South Dakota that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
Discover carefully curated flight deals from Helena to South Dakota that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 1/232:30 pm -
1 stop5h 16m
Tue 1/265:00 pm -
1 stop4h 59m
Deal found 9/10![United Airlines logo]()
$399
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:25 am -
1 stop16h 19m
Tue 11/35:06 pm -
1 stop5h 25m
Deal found 9/12![United Airlines logo]()
$588
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Sat 9/266:25 am -
2 stops15h 46m
Wed 9/305:04 pm -
1 stop5h 14m
Deal found 9/11![United Airlines logo]()
$808
Last-minute flights from Helena to South DakotaDiscover last-minute flight deals from Helena to South Dakota. Data last updated September 13, 2026 and is based on user searches.
Discover last-minute flight deals from Helena to South Dakota. Data last updated September 13, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/186:15 am -
1 stop5h 24m
Mon 9/219:35 am -
1 stop5h 10m
Deal found 9/9![United Airlines logo]()
$583
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/186:15 am -
1 stop5h 24m
Sun 9/205:05 pm -
1 stop5h 25m
Deal found 9/9![United Airlines logo]()
$626
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/186:15 am -
2 stops15h 57m
Sat 9/195:15 pm -
1 stop5h 15m
Deal found 9/10![United Airlines logo]()
$738
This Delta deal was found by Cheapflights users on 9/9. 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 9/187:15 am -
2 stops14h 36m
Sun 9/208:23 am -
2 stops15h 01m
Deal found 9/9![Delta logo]()
$822
This Delta deal was found by Cheapflights users on 9/9. 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 9/187:15 am -
2 stops14h 36m
Sat 9/1910:40 am -
2 stops12h 49m
Deal found 9/9![Delta logo]()
$889
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Sat 9/266:25 am -
1 stop5h 24m
Wed 9/305:04 pm -
1 stop5h 14m
Deal found 9/11![United Airlines logo]()
$509
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:25 am -
1 stop16h 19m
Tue 11/35:06 pm -
1 stop5h 25m
Deal found 9/12![United Airlines logo]()
$588
Find flight deals from Helena to South Dakota
Keep the following information in mind while searching for Helena to South Dakota flight deals. Data was last updated September 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $399 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from Helena to South Dakota 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 13, 2026.
Use the filters below to find and compare flights from Helena to South Dakota that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
HelenaSioux Falls
HLN Helena - FSD Sioux Falls Joe Foss Field
HLNFSD
Helena
Sat 1/23
2:30 pm-8:46 pm
1 stop5h 16m
Sioux Falls Joe Foss Field
Tue 1/26
5:00 pm-8:59 pm
1 stop4h 59m
$399
HelenaSioux Falls
HLN Helena - FSD Sioux Falls Joe Foss Field
HLNFSD
Helena
Thu 10/15
6:25 am-11:44 pm
1 stop16h 19m
Sioux Falls Joe Foss Field
Tue 11/3
5:06 pm-9:31 pm
1 stop5h 25m
$588
HelenaSioux Falls
HLN Helena - FSD Sioux Falls Joe Foss Field
HLNFSD
Helena
Sat 9/26
6:25 am-11:11 pm
2 stops15h 46m
Sioux Falls Joe Foss Field
Wed 9/30
5:04 pm-9:18 pm
1 stop5h 14m
$808
Sorted by cheapest first
Best time to book a flight from Helena to South Dakota
Have a flexible travel schedule? Discover the best time to fly to South Dakota from Helena with our price prediction graph.
HLN-FSD
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.
Cheapflights Insights
Everything you need to know about your flight from Helena to South Dakota
HLN-USSD
HLN-FSD
No data available for this route at this time. Please check back soon.
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