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

Denver, CO (DEN) to Salt Lake City, UT (SLC) flight delay odds

Historically, 77.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 7,758 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
77.1%arrived on time
14.1%30+ min late
0.5%cancelled
7,758scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.8%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+6.9 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 morning1,61689.7%5.9%0.2%
Late morning1,19380.6%10.2%0.5%
Afternoon2,29978.6%12.2%0.7%
Evening1,98066.8%22.1%0.3%
Night67065.7%23.9%0.9%

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
Monday1,16775.4%15.5%0.3%
Tuesday1,10981.8%11.1%0.4%
Wednesday1,09978.0%13.6%0.5%
Thursday1,14976.2%14.3%0.4%
Friday1,15774.8%16.5%0.8%
Saturday98280.0%10.6%0.6%
Sunday1,09573.9%16.7%0.4%

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
Southwest Airlines2,32970.8%17.9%0.5%
Delta Air Lines1,68981.8%11.1%0.4%
SkyWest Airlines1,39978.6%13.7%0.9%
United Airlines1,33177.3%13.1%0.2%
Frontier Airlines1,01081.3%12.3%0.5%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202568758.2%27.4%1.5%
August 202566972.9%18.8%0.7%
September 202564482.1%9.6%0.0%
October 202566381.4%9.2%0.0%
November 202558882.1%8.5%1.9%
December 202562871.8%18.5%0.3%
January 202663483.6%7.7%0.0%
February 202661683.1%10.2%0.8%
March 202666880.1%13.9%0.4%
April 202663981.7%11.0%0.0%
May 202666581.1%14.6%0.0%
June 202665768.6%18.4%0.2%

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.

Airline37.4%
Late aircraft45.5%
National airspace13.0%
Weather4.0%
Security0.1%
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.