BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
DENSUX

Denver, CO (DEN) to Sioux City, IA (SUX) flight delay odds

Historically, 81.8% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 500 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
81.8%arrived on time
11.0%30+ min late
1.6%cancelled
500scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.2%all scheduled flights
120+ minutes late2.8%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+2.0 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning17689.8%5.7%1.7%
Afternoon18775.4%15.0%1.6%
Night12580.8%12.0%1.6%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday7774.0%20.8%0.0%
Tuesday6686.4%7.6%0.0%
Wednesday6388.9%6.3%1.6%
Thursday7685.5%6.6%2.6%
Friday7775.3%13.0%2.6%
Saturday6485.9%6.2%3.1%
Sunday7779.2%14.3%1.3%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines50081.8%11.0%1.6%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 20253158.1%25.8%3.2%
August 20253164.5%29.0%3.2%
September 20253093.3%3.3%0.0%
October 20253190.3%6.5%0.0%
November 20252989.7%6.9%0.0%
December 20253158.1%16.1%3.2%
January 20265789.5%7.0%1.8%
February 20265589.1%7.3%0.0%
March 20266285.5%8.1%3.2%
April 20264789.4%8.5%0.0%
May 20264979.6%10.2%4.1%
June 20264778.7%12.8%0.0%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline33.4%
Late aircraft40.3%
National airspace17.5%
Weather8.3%
Security0.6%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.