$359+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — FSD
Nov 25 — Dec 21
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
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 South Dakota
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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 October 26, 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 October 26, 2026.
This United Airlines deal was found by Cheapflights users on 10/23. 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 12/32:35 pm -
1 stop4h 58m
Sun 12/69:24 am -
1 stop5h 28m
Deal found 10/23![United Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 10/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/232:30 pm -
1 stop4h 50m
Tue 10/279:32 am -
1 stop5h 08m
Deal found 10/21![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:08 pm -
2 stops9h 14m
Tue 10/275:10 am -
2 stops8h 18m
Deal found 10/21![Delta logo]()
$489
This Delta deal was found by Cheapflights users on 10/22. 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 10/301:08 pm -
2 stops9h 14m
Mon 11/21:00 pm -
2 stops10h 24m
Deal found 10/22![Delta logo]()
$574
This United Airlines deal was found by Cheapflights users on 10/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:28 am -
2 stops10h 25m
Mon 11/25:06 pm -
1 stop5h 25m
Deal found 10/22![United Airlines logo]()
$943
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 October 26, 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 October 26, 2026.
This United Airlines deal was found by Cheapflights users on 10/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/306:15 am -
1 stop5h 10m
Tue 2/25:13 pm -
1 stop5h 19m
Deal found 10/21![United Airlines logo]()
$459
Last-minute flights from Helena to South DakotaDiscover last-minute flight deals from Helena to South Dakota. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from Helena to South Dakota. Data last updated October 26, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/232:30 pm -
1 stop4h 50m
Tue 10/279:32 am -
1 stop5h 08m
Deal found 10/21![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:08 pm -
2 stops9h 14m
Tue 10/275:10 am -
2 stops8h 18m
Deal found 10/21![Delta logo]()
$489
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/291:08 pm -
2 stops9h 14m
Mon 11/21:00 pm -
2 stops10h 24m
Deal found 10/21![Delta logo]()
$1,004
This United Airlines deal was found by Cheapflights users on 10/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:28 am -
1 stop16h 16m
Mon 11/25:06 pm -
1 stop5h 25m
Deal found 10/21![United Airlines logo]()
$1,168
This Delta deal was found by Cheapflights users on 10/22. 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 10/301:08 pm -
2 stops9h 14m
Mon 11/21:00 pm -
2 stops10h 24m
Deal found 10/22![Delta logo]()
$574
This United Airlines deal was found by Cheapflights users on 10/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:28 am -
2 stops10h 25m
Mon 11/25:06 pm -
1 stop5h 25m
Deal found 10/22![United Airlines logo]()
$943
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 October 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $359 (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 October 26, 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 1/30
6:15 am-12:25 pm
1 stop5h 10m
Sioux Falls Joe Foss Field
Tue 2/2
5:13 pm-9:32 pm
1 stop5h 19m
$459
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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