Cheap flight deals from Helena to Sioux Falls

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

Round-trip
One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to fly from Helena to Sioux Falls?

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights

From price

20 27
May

27 4
4 11
11 18
18 25
Jun

25 1
1 8
8 15
15 22
22 29
Jul

29 6
6 13

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

When are flight tickets from Helena (HLN) to Sioux Falls (FSD) the cheapest?

Airlines adjust prices for flights from Helena to Sioux Falls based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much do flights from Helena (HLN) to Sioux Falls (FSD) cost?

According to Trip.com's data, the lowest price is around Rp 10,412,787.

How to find a cheap flight from Helena to Sioux Falls

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Helena to Sioux Falls. Book your flights at the right time and save more.

Be flexible with your travel dates to get the cheapest Helena to Sioux Falls ticket.

Tap "Date" in the flight search bar to browse the calendar and find airfare from Helena to Sioux Falls for the next six months in 2025. If you're looking to fly within the next three months, the lowest fare is Rp 4251156 for a one-way ticket on Sat, Apr 26.

Compare cheap Helena to Sioux Falls flight deals from hundreds of airlines.

Our powerful search system compares prices from over 500 airlines. So you can find the cheapest flights from Helena to Sioux Falls. The most affordable airline currently operating on this route is United Airlines.

Set up a Price Alert to track fare drops.

Set up a Price Alert for your Helena to Sioux Falls route to track ticket prices effortlessly—no need to check manually every day.

Don't miss out on cheap Helena to Sioux Falls flight deals and promo codes.

Stay updated on the latest deals with Trip.com Deals and Promo Codes for cheap flights. Sign up for a free membership to unlock even more exclusive flight discounts.

Book early or wait unitl the last minute to fine the best fares.

It's always better to book early! Airlines typically release their lowest fares about a year before departure, so check as soon as flights become available. If you miss that window, you may still find great deals closer to your travel date.

Search for flights on the go.

For the best booking experience on the go, download Trip.com and search for cheap flights from Helena to Sioux Falls to access exclusive deals just for you.

Flight Info | Helena to Sioux Falls

Cheapest one-way flight price	Rp 4,251,155
Off-season for travel	July
Peak season for travel	May
Flight distance	1,240.5 km
Popular airline	Alaska Airlines