Cheap Flights from Sioux Falls to St Louis

Compare Sioux Falls to St Louis flight deals

Find the cheapest month or even day of the year to fly to St Louis

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Flight deals from Sioux Falls to St Louis

Looking for a cheap last-minute deal or the best return flight from Sioux Falls Airport to St Louis Airport? If you want to travel next month, return fares start from $476. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Sioux Falls to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Sioux Falls to St Louis flights are currently cheapest in July.

Sioux Falls to St Louis: Alternative routes

Compare routes from Sioux Falls to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

Sioux Falls to St Louis: Flight information

The things to know before you go.
Cheapest flight found$476
Cheapest month to flyJuly

Finding cheap flights from Sioux Falls to St Louis: Frequently asked questions

The best price we found for a return flight from Sioux Falls to St Louis is $476. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Sioux Falls to St Louis. But we found flights with one or more stops from $476.
As of June 2026, there are no flights flying from Sioux Falls to St Louis.
The cheapest month to fly from Sioux Falls to St Louis is usually July.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Sioux Falls Airport to St Louis Airport on Tuesday, 21 July 2026.
No airlines currently offer direct flights between Sioux Falls Airport and St Louis Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, United offers the cheapest flight tickets to St Louis.

Flying from Sioux Falls Airport (FSD) to St Louis Airport (STL): what you need to know

  • Sioux Falls and St Louis are in the UTC-6 timezone. This means you won't need to account for any time differences.

  • Your FSD to STL flight won't wait if you're late, so get to the airport with time to spare. Arrive up to one hour in advance for domestic flights and two hours ahead when you're flying internationally.

  • Flying during a peak time like May? School holidays and other high seasons can lead to longer queues and delays at security. Be extra cautious and get there up to four hours ahead of international flights and two hours before domestic departures.

  • Consider adding a stopover when booking your ticket from Sioux Falls Airport to St Louis Airport. Simply deselect 'Direct flights only' to break up your trip, or perhaps see a new city along the way. Here's where you can stop between FSD and STL:

    • Chicago O'Hare International Airport

    • Minneapolis St Paul Airport

    • Nashville Airport

How to find the cheapest flights from Sioux Falls Airport (FSD) to St Louis Airport (STL)

  • Currently, $449 is the lowest price we've found for a one-way Sioux Falls Airport to St Louis Airport flight. The best price for a return plane ticket is $476. Remember that fares may change due to availability when booking.

  • It's usually best to book ahead of time if you want to find cheap tickets from FSD to STL. That's because airlines adjust prices based on demand, which tends to increase closer to departure.

  • If you're flexible with your travel dates, use the 'Whole month' search tool. It'll show you the cheapest price in each month when searching for your flight from Sioux Falls Airport to St Louis Airport.

  • There's no need to check every day to find out if fares have gone down when you create a Price Alert. We'll update you as soon as there's a change in price on cheap flights from FSD to STL.

  • Tailor your flights with filters. Pick your preferred departure and arrival times, airlines and total journey duration. You can also sort results by 'Fastest,' 'Best' or 'Cheapest' flights from Sioux Falls Airport to St Louis Airport.

Handy information about Sioux Falls Airport (FSD)

  • You'll find FSD at 2801 Jaycee Lane.

  • 70% of flights that leave from Sioux Falls Airport land at their destination on schedule.

  • Central Sioux Falls to Sioux Falls Airport is approximately 10 kilometres. Depending on traffic, it'll take about 15 minutes to get there if you're ride-sharing, catching a taxi or driving.

  • The journey on public transport typically takes 35 minutes.

  • Searching for a handy hotel near FSD? If you're boarding an early flight from Sioux Falls Airport to St Louis Airport, these stays will put you moments from your check-in counter:

Arriving at St Louis Airport (STL)

Getting from St Louis Airport (STL) to central St Louis

  • You'll find STL at 10701 Lambert International Blvd..

  • St Louis Airport is approximately 24 kilometres from central St Louis. Driving there takes about 25 minutes.

  • It takes roughly 30 minutes to get there by public transport.

When to fly to St Louis Airport (STL)

  • The quietest month for a flight from Sioux Falls Airport to St Louis Airport is March, while July is the busiest. Pick the best time to go to St Louis based on whether you prefer a more fast-paced or easygoing experience.

  • Book your flight from Sioux Falls Airport to St Louis Airport for July if you'd like to go to St Louis during its warmest month. You can expect temperatures of between 17ºC and 33ºC.

  • If you like travelling in cooler conditions, search for a cheap ticket from FSD to STL in January. Average temperatures are between -7ºC and 8ºC then.

Explore more of the United States

  • St Louis is always a good idea, but there are so many other corners of the United States you should also see. About 418 kilometres north-east of St Louis, a trip to Chicago will keep your itinerary busy. Check out popular attractions like Millennium Park, Art Institute of Chicago and Willis Tower.

  • Around 370 kilometres east of St Louis, Indianapolis is another favourite stop in the United States. Start your sightseeing at Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.