ORD to SUX flight delays
Chicago, IL (ORD) Sioux City, IA (SUX) · 436 miles
730 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
62.75%
Arrived on time
Within 15 minutes of schedule
3.7%
Cancelled
Share of scheduled flights
115 min
When late, late by
Average across delayed arrivals
44 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In September it ran 54 points more punctual than in April — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
Cancellation, not delay, is the risk worth pricing here: 3.7% of scheduled flights never operated. A late flight still gets you there. A cancelled one leaves you rebooking, and on a route with few daily departures that can mean losing a day.
This is a late route. Flights from Chicago to Sioux City miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
The two directions do not behave alike. SUX to ORD arrives on time 12.6 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Which airline should you fly on this route?
Over July 2024 – July 2026, SkyWest Airlines arrived on time most often on ORD to SUX. Flights ran closest to schedule in September and worst in July.
Every airline on ORD to SUX
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 730 | 62.75% | 3.7% | 115 min | F |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SUX to ORD Sioux City back to Chicago 75.35% on time DOther routes from Chicago
Common questions
Are flights from Chicago to Sioux City usually delayed?
62.75% of flights on the ORD to SUX route arrived within 15 minutes of schedule, so roughly 4 in every ten arrived late. That is worse than the average route in this record.
Which airlines fly from Chicago to Sioux City?
Only SkyWest Airlines appears in the published record on this route, with 730 flights and 62.75% arriving on time.
How often are ORD to SUX flights cancelled?
3.7% of scheduled flights did not operate — about 37 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
What is the best month to fly Chicago to Sioux City?
September, when 89.7% of flights arrived on time. The worst was April at 35.7%.
When ORD to SUX flights are late, how late are they?
About 115 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on ORD to SUX during July 2024 – July 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →