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$265+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — FSD
ago. 25 — sep. 11
lun. 8/25
lun. 9/1
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 agosto 20, 2025.

Round-trip from

$265
(United Airlines)
From Helena to Sioux Falls Joe Foss Field
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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 agosto 20, 2025.

This United Airlines deal was found by Cheapflights users on 8/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/302:44 pmHLN - FSD
1 stop4h 37mUnited Airlines
sáb. 10/49:30 amFSD - HLN
1 stop5h 37mUnited Airlines
Deal found 8/20$265
This United Airlines deal was found by Cheapflights users on 8/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/252:30 pmHLN - FSD
1 stop4h 59mUnited Airlines
lun. 9/19:15 amFSD - HLN
1 stop5h 15mUnited Airlines
Deal found 8/18$354
This Delta deal was found by Cheapflights users on 8/18. 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.
lun. 8/251:00 pmHLN - FSD
2 stops9h 46mDelta
lun. 9/15:00 amFSD - HLN
2 stops8h 20mDelta
Deal found 8/18$569

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 agosto 20, 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

mar. 9/30

2:44 pm-8:21 pm

1 stop4h 37m

Sioux Falls Joe Foss Field

sáb. 10/4

9:30 am-2:07 pm

1 stop5h 37m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

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.

Reviews of airlines servicing Sioux Falls

Get insights into the airlines that provide service to Sioux Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sioux Falls. Reviews last updated agosto 20, 2025.
Get a feel of what it's like to fly with United Airlines from Helena to Sioux Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,928 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,928 reviews
United Airlines
7.4
Good
8,928 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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 4h 37m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 770 mi.

  • What is the cheapest airline to fly from Helena to Sioux Falls round-trip?

    Our cheapest airline available from Helena to Sioux Falls is United Airlines. Our recent data shows that you can find tickets from as low as $378 on this airline.

  • 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

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Alternative routes for Helena to Sioux Falls

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Top airline flying from Helena to Sioux Falls

Discover the top airline that operate flights from Helena to Sioux Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$378Average$571FlexibilityNo cancel feeOn-time69%

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