In terms of precipitation, rainfall in South Dakota 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 South Dakota when rainfall is around 0.6 in.

If weather is an important factor for your trip to South Dakota, 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 time of day to fly from HLN to SD?

When flying from Helena to South Dakota, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from Helena to South Dakota?

Most people fly from Helena (HLN) if they book a flight from Helena to South Dakota. Helena is conveniently located just 2.7 mi from Helena’s city center.

Can I find deals for flights from Helena to South Dakota that include hotel bookings?

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

How can I find direct flights from Helena to South Dakota?

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

Can I find deals for business class flights from Helena to South Dakota?

Yes. Cheapflights offers flight deals from Helena to South Dakota 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 South Dakota

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Cheap flight deals from Helena to South Dakota

Round-trip from	$259 (Delta)

From Helena to South Dakota

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Find flight deals from Helena to South Dakota

Cheapest flights from Helena to South Dakota
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 July 30, 2025.

Fri 8/225:50 amHLN - FSD

2 stops7h 00mDelta

Sat 8/3012:56 pmFSD - HLN

2 stops10h 17mDelta

Deal found 7/28

$259

Tue 8/125:39 pmHLN - FSD

1 stop4h 27mUnited Airlines

Sat 8/165:10 pmFSD - HLN

1 stop5h 05mUnited Airlines

Deal found 7/28

$303

Best flights from Helena to South Dakota
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 July 30, 2025.

Fri 8/225:50 amHLN - FSD

2 stops7h 00mDelta

Sat 8/3012:56 pmFSD - HLN

2 stops10h 17mDelta

Deal found 7/28

$259

Tue 8/125:39 pmHLN - FSD

1 stop4h 27mUnited Airlines

Sat 8/165:10 pmFSD - HLN

1 stop5h 05mUnited Airlines

Deal found 7/28

$303

Last-minute flights from Helena to South Dakota
Discover last-minute flight deals from Helena to South Dakota. Data last updated July 30, 2025 and is based on user searches.

Tue 8/125:39 pmHLN - FSD

1 stop4h 27mUnited Airlines

Sat 8/165:10 pmFSD - HLN

1 stop5h 05mUnited Airlines

Deal found 7/28

$303

Fri 8/225:50 amHLN - FSD

2 stops7h 00mDelta

Sat 8/3012:56 pmFSD - HLN

2 stops10h 17mDelta

Deal found 7/28

$259

Fly from

Fly to

Route

Depart

Return

Price

HelenaSioux Falls

HLN - FSD

HLNFSD

Helena

Fri 8/22

5:50 am-1:50 pm

2 stops7h 00m

Sioux Falls Joe Foss Field

Sat 8/30

12:56 pm-10:13 pm

2 stops10h 17m

$259

HelenaSioux Falls

HLN - FSD

HLNFSD

Helena

Tue 8/12

5:39 pm-11:06 pm

1 stop4h 27m

Sioux Falls Joe Foss Field

Sat 8/16

5:10 pm-9:15 pm

1 stop5h 05m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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.

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

What is the cheapest month to book a flight from Helena to South Dakota?

Currently, September is the cheapest month in which you can book a flight from Helena to South Dakota (average of $334). Flying from Helena to South Dakota 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 South Dakota

Get a feel of what it's like to fly with Delta and United Airlines from Helena to South Dakota by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,980 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

7,980 reviews

Delta

8.0

Very good

7,980 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

8,896 reviews

Delta

8.0

Very good

7,980 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 airport do you fly from for flights from Helena to South Dakota?
Most people fly from Helena (HLN) if they book a flight from Helena to South Dakota. Helena is conveniently located just 2.7 mi from Helena’s city center.
Can I find deals for flights from Helena to South Dakota that include hotel bookings?
Yes. In addition to deals on Helena to South Dakota flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Helena to South Dakota?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to South Dakota.
Can I find deals for business class flights from Helena to South Dakota?
Yes. Cheapflights offers flight deals from Helena to South Dakota 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 South Dakota?
Currently, September is the cheapest month in which you can book a flight from Helena to South Dakota (average of $334). Flying from Helena to South Dakota 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 South Dakota

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 (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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Helena to South Dakota 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 South Dakota

Keep the following information in mind while searching for Helena to South Dakota flight deals. Data was last updated July 30, 2025.

Round-trip from

Find flight deals from Helena to South Dakota

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 July 30, 2025.

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 July 30, 2025.

Cheapflights Fare Finder

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

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.

Cheapflights Insights

Everything you need to know about your flight from Helena to South Dakota

What is the cheapest month to book a flight from Helena to South Dakota?

Reviews of airlines servicing South Dakota

Get a feel of what it's like to fly with Delta and United Airlines from Helena to South Dakota by reading reviews from past customers. You can also see how each airline compares 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 South Dakota. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Helena to South Dakota?

Can I find deals for flights from Helena to South Dakota that include hotel bookings?

How can I find direct flights from Helena to South Dakota?

Can I find deals for business class flights from Helena to South Dakota?

What is the cheapest month to book a flight from Helena to South Dakota?

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 South Dakota

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

Top airline flying from Helena to South Dakota

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Helena to South Dakota
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 July 30, 2025.