Find cheap flights 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 book flights from Helena to Sioux Falls?

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

Cheapest flights

From price

23 30
Apr

30 6
6 13
13 20
20 27
May

27 4
4 11
11 18
18 25
Jun

25 1
1 8
8 15

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 $619.
What is the transportation method from the main airport to downtown in Sioux Falls?
- The distance from Sioux Falls Regional Airport to downtown is about 3 km. It takes about 20 minutes by taxi.

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.

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

Tap "Date" on flight search bar to scan through the calender for Helena to Sioux Falls airfare over next 6 months in 2025.

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

Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from Helena to Sioux Falls.

Set up a Price Alert

By setting up a Price Alert for your Helena to Sioux Falls route, you can easily track the price of your airline tickets from Helena to Sioux Falls without manually checking every day.

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

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Book early or wait unitl the last minute.

It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.

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To get the best flight booking experience on the go, download Trip.com free app and search for cheap flight tickets from Helena to Sioux Falls to get exclusive deals for you.