United AirlinesDepart06:00
Sat, Nov 14SUX → STL
3h 36m · 1 stop
$384one way, per person
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- Cheapest fare
- $384
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 3h 36m
United Airlines · Sat, Nov 14
from $384
Usually 1+ stop
680 km
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Cheapest month to fly from Sioux City to St Louis
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 Sioux City to St Louis
Sioux City (SUX) and St Louis (STL) 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 36m. Over the next few months, one-way fares start from $384, 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 Sioux City to St Louis?
The cheapest one-way fare we've seen recently is $384 with United Airlines, departing Saturday, November 14, 2026.
What is the cheapest month to fly from Sioux City to St Louis?
November 2026 currently has the lowest fares, from $384 one way.
Are there direct flights from Sioux City to St Louis?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Sioux City to St Louis?
The quickest journey we've seen takes about 3h 36m. Sioux City and St Louis are around 680 km apart.
Which airlines fly from Sioux City to St Louis?
Recent fares on this route were with United Airlines.
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