SUX to DEN flight delays
Sioux City, IA (SUX) Denver, CO (DEN) · 466 miles
864 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
67.69%
Arrived on time
Within 15 minutes of schedule
1.85%
Cancelled
Share of scheduled flights
101 min
When late, late by
Average across delayed arrivals
34 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In December it ran 62.5 points more punctual than in June — 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.
The two directions do not behave alike. DEN to SUX arrives on time 12 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.
This route does worse than its own airport. SUX as a whole runs 9.6 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
This is a late route. Flights from Sioux City to Denver miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
Which airline should you fly on this route?
Over July 2024 – July 2026, SkyWest Airlines arrived on time most often on SUX to DEN. Flights ran closest to schedule in November and worst in August.
Every airline on SUX to DEN
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 | 864 | 67.69% | 1.85% | 101 min | D |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
DEN to SUX Denver back to Sioux City 79.72% on time COther routes from Sioux City
Common questions
Are flights from Sioux City to Denver usually delayed?
67.69% of flights on the SUX to DEN route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airlines fly from Sioux City to Denver?
Only SkyWest Airlines appears in the published record on this route, with 864 flights and 67.69% arriving on time.
How often are SUX to DEN flights cancelled?
1.85% of scheduled flights did not operate — about 19 in every thousand. That is in the normal range.
What is the best month to fly Sioux City to Denver?
December, when 93.5% of flights arrived on time. The worst was June at 31%.
When SUX to DEN flights are late, how late are they?
About 101 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 SUX to DEN 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 →