Southwest Airlines DEN to SLC on-time performance
Southwest Airlines nonstop flights from Denver to Salt Lake City · Aug 2025 – Jul 2026
On-time arrivals
73%
arrived < 15 min late
Cancelled
0.4%
9 flights
Avg arrival delay
15 min
51 min when late
Rank on route
#5 of 5
route average 79% on time
Key facts
- Southwest Airlines flights on DEN to SLC arrived on time 73% of the time in Aug 2025 – Jul 2026.
- 0.4% were cancelled, and 7% arrived an hour or more late.
- That ranks #5 of 5 airlines on this route, which averaged 79% on time overall.
- The largest source of delay minutes was late-arriving aircraft (53%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft53%
- Airline (crew, maintenance, cleaning, fueling)39%
- Air traffic control & airport congestion7%
- Extreme weather1%
- Security0%
Other airlines on DEN to SLC
- Delta Air Lines83% on time · 14 min avg delay
- SkyWest Airlines80% on time · 14 min avg delay
- United Airlines79% on time · 13 min avg delay
- Frontier Airlines82% on time · 11 min avg delay
Full DEN to SLC comparison →
Southwest Airlines on-time record across all routes →
2,307 Southwest Airlines flights tracked on this route; 9 cancelled, 2 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.