United AirlinesDepart11:15
Sat, Nov 14STL → SUX
3h 26m · 1 stop
$380one way, per person
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- Cheapest fare
- $380
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 3h 21m
United Airlines · Sat, Nov 14
from $380
Usually 1+ stop
680 km
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Cheapest month to fly from St Louis to Sioux City
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
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About flights from St Louis to Sioux City
St Louis (STL) and Sioux City (SUX) are about 680 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 3h 21m. Over the next few months, one-way fares start from $380, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from St Louis to Sioux City?
The cheapest one-way fare we've seen recently is $380 with United Airlines, departing Saturday, November 14, 2026.
What is the cheapest month to fly from St Louis to Sioux City?
November 2026 currently has the lowest fares, from $380 one way.
Are there direct flights from St Louis to Sioux City?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from St Louis to Sioux City?
The quickest journey we've seen takes about 3h 21m. St Louis and Sioux City are around 680 km apart.
Which airlines fly from St Louis to Sioux City?
Recent fares on this route were with United Airlines.
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