Southwest Airlines SAN to DEN on-time performance
Southwest Airlines nonstop flights from San Diego to Denver · Aug 2025 – Jul 2026
On-time arrivals
72%
arrived < 15 min late
Cancelled
0.8%
18 flights
Avg arrival delay
17 min
55 min when late
Rank on route
#5 of 5
route average 79% on time
Key facts
- Southwest Airlines flights on SAN to DEN arrived on time 72% of the time in Aug 2025 – Jul 2026.
- 0.8% were cancelled, and 9% 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%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)19%
- Extreme weather3%
- Security0%
Other airlines on SAN to DEN
- United Airlines86% on time · 10 min avg delay
- Frontier Airlines82% on time · 15 min avg delay
- Alaska Airlines85% on time · 9 min avg delay
- SkyWest Airlines75% on time · 13 min avg delay
Full SAN to DEN comparison →
Southwest Airlines on-time record across all routes →
2,386 Southwest Airlines flights tracked on this route; 18 cancelled, 10 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.