What are the cheapest airlines flying from Helena to Sioux Falls round-trip?

Our cheapest airline available from Helena to Sioux Falls is Delta. Our recent data shows that you can find tickets from as low as $259 on this airline. An additional option worth looking into is United Airlines, starting at $319.

What is the cheapest day to fly from Helena to Sioux Falls?

Travelers seeking maximum savings on their Helena to Sioux Falls flight should consider departing on Thursday at noon when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Sioux Falls ranges from 0.6 - 3.9 inches per month. June is typically the wettest month, when rainfall can reach 3.9 in. January is typically the driest time to visit Sioux Falls when rainfall is around 0.6 in.

If weather is an important factor for your trip to Sioux Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

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

Flights from Helena to Sioux Falls are found to be more expensive on Thursday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Sioux Falls.

What is the cheapest time of day to fly from HLN to FSD?

It’s typically best to fly out from Helena to Sioux Falls in the morning. Doing so could potentially save you 5% on the flight price compared to flying at noon, which is usually more expensive.

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.

$259+ Flights from Helena to Sioux Falls

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Cheap flight deals from Helena to Sioux Falls

Round-trip from	$259 (Delta)

From Helena to Sioux Falls Joe Foss Field

Search Deals

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 July 3, 2025.

Sat 8/301:00 pmHLN - FSD

2 stops9h 46mDelta

Sat 9/612:56 pmFSD - HLN

2 stops10h 17mDelta

Deal found 7/1

$259

Sat 8/305:20 pmHLN - FSD

1 stop4h 40mUnited Airlines

Tue 9/911:44 amFSD - HLN

1 stop5h 20mUnited Airlines

Deal found 7/1

$319

Best flights from Helena to Sioux Falls
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 July 3, 2025.

Sat 8/301:00 pmHLN - FSD

2 stops9h 46mDelta

Tue 9/95:00 amFSD - HLN

2 stops8h 20mDelta

Deal found 7/1

$259

Sat 8/305:20 pmHLN - FSD

1 stop4h 40mUnited Airlines

Sat 9/65:06 pmFSD - HLN

1 stop5h 05mUnited Airlines

Deal found 7/1

$319

Last-minute flights from Helena to Sioux Falls
Discover last-minute flight deals from Helena to Sioux Falls. Data last updated July 3, 2025 and is based on user searches.

Fri 7/115:39 pmHLN - FSD

1 stop4h 58mUnited Airlines

Sun 7/139:15 amFSD - HLN

1 stop5h 43mUnited Airlines

Deal found 7/2

$469

Fri 7/111:00 pmHLN - FSD

2 stops9h 44mDelta

Sun 7/136:00 amFSD - HLN

2 stops7h 20mDelta

Deal found 7/2

$983

Sat 8/301:00 pmHLN - FSD

2 stops9h 46mDelta

Sat 9/612:56 pmFSD - HLN

2 stops10h 17mDelta

Deal found 7/1

$259

Sat 8/305:20 pmHLN - FSD

1 stop4h 40mUnited Airlines

Tue 9/911:44 amFSD - HLN

1 stop5h 20mUnited Airlines

Deal found 7/1

$319

Cheapflights Fare Finder

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

Price

HelenaSioux Falls

HLN - FSD

HLNFSD

Helena

Sat 8/30

1:00 pm-11:46 pm

2 stops9h 46m

Sioux Falls Joe Foss Field

Tue 9/9

5:00 am-12:20 pm

2 stops8h 20m

$259

HelenaSioux Falls

HLN - FSD

HLNFSD

Helena

Sat 8/30

5:20 pm-11:00 pm

1 stop4h 40m

Sioux Falls Joe Foss Field

Sat 9/6

5:06 pm-9:11 pm

1 stop5h 05m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 a feel of what it's like to fly with Delta and 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.

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,982 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,861 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Helena to Sioux Falls round-trip?
Our cheapest airline available from Helena to Sioux Falls is Delta. Our recent data shows that you can find tickets from as low as $259 on this airline. An additional option worth looking into is United Airlines, starting at $319.
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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Helena to Sioux Falls

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$378	Average$571	FlexibilityNo cancel fee	On-time69%

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$259+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Helena to Sioux Falls with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Helena to Sioux Falls

Round-trip from

Find flight deals from Helena to Sioux Falls

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 July 3, 2025.

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 July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Helena to Sioux Falls that are best for you.

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.

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?

Reviews of airlines servicing Sioux Falls

Get a feel of what it's like to fly with Delta and 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.

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.

What are the cheapest airlines flying from Helena to Sioux Falls round-trip?

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Helena to Sioux Falls

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Helena to Sioux Falls

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Book with Flexibility

Travel Smart

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 July 3, 2025.