Historical on-time performance

DENSLC

Denver to Salt Lake City

390 miData through Dec 2025Source: US DOT · BTS

Flights on DEN–SLC arrive on time 75% of the time over the last 12 months.

On-time rate75%arrived within 15 min

Median delayon timetypical arrival

p90 delay50 min1 in 10 flights is worsetail risk

Cancelled0.5%of scheduled flights

based on 7,757 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Airline	On-time	Median	p90	Cancel	Flights
Delta Air Linesbest	80%	on time	45 min	0.2%	1,672
SkyWest Airlines	74%	on time	60 min	1.0%	1,357
United Airlines	75%	on time	45 min	0.1%	1,349
Frontier Airlines	78%	on time	40 min	0.6%	969
Southwest Airlines	70%	on time	50 min	0.5%	2,410

Delta Air Linesbest
On-time80%
Medianon time
p9045 min
Cancel0.2%
Flights1,672
SkyWest Airlines
On-time74%
Medianon time
p9060 min
Cancel1.0%
Flights1,357
United Airlines
On-time75%
Medianon time
p9045 min
Cancel0.1%
Flights1,349
Frontier Airlines
On-time78%
Medianon time
p9040 min
Cancel0.6%
Flights969
Southwest Airlines
On-time70%
Medianon time
p9050 min
Cancel0.5%
Flights2,410

Why flights run late

Delay causes

Airline36%
Weather4%
Air traffic (NAS)14%
Late aircraft46%
Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

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Related pages

Delay predictorfor this route→DEN airportDenver→SLC airportSalt Lake City→ExpressJet Airlines (Continental Express) on this routecarrier detail→ExpressJet Airlines (Continental Express)airline profile→