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Sioux Falls

$239+ Cheap flights from Helena to Sioux Falls (HLN - FSD)

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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — FSD
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap 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 16, 2025.

Round-trip from

$418
(United Airlines)

One-way from

$239
(United Airlines)
From Helena to Sioux Falls Joe Foss Field
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One-way flight from Helena to Sioux Falls Joe Foss Field
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Find flight deals from Helena to Sioux Falls

Cheapest flights from Helena to Sioux Falls
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 16, 2025.

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.
Thu 9/185:20 pmHLN - FSD
1 stop5h 20mUnited Airlines
Tue 9/239:16 amFSD - HLN
1 stop5h 14mUnited Airlines
Deal found 9/14$324

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 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Helena to Sioux Falls that are best for you.

Fly from

Helena

Fly to

Sioux Falls

Route

Depart

Return

Price

HelenaSioux Falls

HLN - FSD

HLNFSD

Helena

Sat 3/7

2:30 pm-8:46 pm

1 stop5h 16m

Sioux Falls Joe Foss Field

Wed 3/11

5:00 pm-8:59 pm

1 stop4h 59m

$418

HelenaSioux Falls

HLN - FSD

HLNFSD

Helena

Sat 3/7

12:50 pm-10:58 pm

2 stops9h 08m

Sioux Falls Joe Foss Field

Wed 3/11

4:09 pm-10:38 pm

2 stops31h 29m

$731

HelenaSioux Falls

HLN - FSD

HLNFSD

Helena

Tue 10/21

5:18 pm-11:15 pm

1 stop4h 57m

$239

HelenaSioux Falls

HLN - FSD

HLNFSD

Helena

Tue 10/21

1:00 pm-10:57 pm

2 stops8h 57m

$244

HelenaSioux Falls

HLN - FSD

HLNFSD

Helena

Tue 10/21

6:18 pm-10:57 pm

3 stops51h 39m

$549

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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.
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 Sioux Falls

What is the cheapest month to book a flight from Helena to Sioux Falls?

Currently, September is the cheapest month in which you can book a flight from Helena to Sioux Falls (average of $334). Flying from Helena to Sioux Falls in December is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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.

  • How long is the flight from Helena to Sioux Falls?

    Airlines like United Airlines fly from Helena to Sioux Falls in about 5h 16m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 770 mi.

  • Can I find deals for flights from Helena to Sioux Falls that include hotel bookings?

    Yes. In addition to deals on Helena to Sioux Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Helena to Sioux Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to Sioux Falls.

  • Can I find deals for business class flights from Helena to Sioux Falls?

    Yes. Cheapflights offers flight deals from Helena to Sioux Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Helena to Sioux Falls?

    Currently, September is the cheapest month in which you can book a flight from Helena to Sioux Falls (average of $334). Flying from Helena to Sioux Falls in December is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Sioux Falls?

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Marshall

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