$369+ Cheap flights from Helena to Sioux Falls (HLN - FSD)
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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — FSD
Oct 17 — Oct 241
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 Sioux Falls
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Best
Last-minute
Cheapest flights from Helena to Sioux FallsExplore the most affordable flight options available from Helena to Sioux Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
Explore the most affordable flight options available from Helena to Sioux Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/22:30 pm -
1 stop4h 50m
Sun 10/49:42 am -
1 stop5h 06m
Deal found 9/14![United Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/12:30 pm -
1 stop4h 50m
Mon 10/55:04 pm -
1 stop5h 04m
Deal found 9/16![United Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/12:23 pm -
1 stop4h 41m
Sat 11/75:06 pm -
1 stop5h 25m
Deal found 9/15![United Airlines logo]()
$488
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 9/15. 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 11/12:23 pm -
1 stop4h 41m
Fri 11/69:32 am -
1 stop5h 08m
Deal found 9/15![United Airlines logo]()
$666
Best flights from Helena to Sioux FallsDiscover carefully curated flight deals from Helena to Sioux Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
Discover carefully curated flight deals from Helena to Sioux Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/22:30 pm -
1 stop4h 50m
Sun 10/49:42 am -
1 stop5h 06m
Deal found 9/14![United Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/12:30 pm -
1 stop4h 50m
Mon 10/55:04 pm -
1 stop5h 04m
Deal found 9/16![United Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/14![United Airlines logo]()
$419
Last-minute flights from Helena to Sioux FallsDiscover last-minute flight deals from Helena to Sioux Falls. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from Helena to Sioux Falls. Data last updated September 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/12:30 pm -
1 stop4h 50m
Mon 10/55:04 pm -
1 stop5h 04m
Deal found 9/16![United Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/22:30 pm -
1 stop4h 50m
Sun 10/49:42 am -
1 stop5h 06m
Deal found 9/14![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 9/14. 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 10/27:15 am -
2 stops11h 28m
Sun 10/45:05 am -
2 stops8h 12m
Deal found 9/14![Delta logo]()
$1,119
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 Sioux Falls
Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to Sioux Falls (FSD). 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 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $369 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from Helena to Sioux Falls 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 17, 2026.
Use the filters below to find and compare flights from Helena to Sioux Falls that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HelenaSioux Falls
HLN Helena - FSD Sioux Falls Joe Foss Field
HLNFSD
Helena
Fri 10/2
2:30 pm-8:20 pm
1 stop4h 50m
Sioux Falls Joe Foss Field
Sun 10/4
9:42 am-1:48 pm
1 stop5h 06m
$369
Quickest round-trip
HelenaSioux Falls
HLN Helena - FSD Sioux Falls Joe Foss Field
HLNFSD
Helena
Thu 10/1
2:30 pm-8:20 pm
1 stop4h 50m
Sioux Falls Joe Foss Field
Mon 10/5
5:04 pm-9:08 pm
1 stop5h 04m
$381
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
$419
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Helena-Sioux Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Helena-Sioux Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Helena-Sioux Falls flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Helena-Sioux Falls 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-Sioux Falls 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 Sioux Falls
Have a flexible travel schedule? Discover the best time to fly to Sioux Falls 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.
Related info for your journey
Find useful and relevant information for your journey from Helena to Sioux Falls. 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 Sioux Falls?
Book flights to Sioux Falls if you plan to visit one of these locationsYankton
Marshall
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