Southwest Airlines SLC to DEN on-time performance
Southwest Airlines nonstop flights from Salt Lake City to Denver · Aug 2025 – Jul 2026
On-time arrivals
73%
arrived < 15 min late
Cancelled
0.6%
13 flights
Avg arrival delay
14 min
48 min when late
Rank on route
#5 of 5
route average 79% on time
Key facts
- Southwest Airlines flights on SLC to DEN arrived on time 73% of the time in Aug 2025 – Jul 2026.
- 0.6% were cancelled, and 6% 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 air traffic control & airport congestion (46%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion46%
- Late-arriving aircraft37%
- Airline (crew, maintenance, cleaning, fueling)16%
- Extreme weather1%
- Security0%
Other airlines on SLC to DEN
- Delta Air Lines81% on time · 14 min avg delay
- SkyWest Airlines85% on time · 11 min avg delay
- United Airlines81% on time · 13 min avg delay
- Frontier Airlines79% on time · 17 min avg delay
Full SLC to DEN comparison →
Southwest Airlines on-time record across all routes →
2,306 Southwest Airlines flights tracked on this route; 13 cancelled, 4 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.