Southwest Airlines DEN to SAN on-time performance
Southwest Airlines nonstop flights from Denver to San Diego · Aug 2025 – Jul 2026
On-time arrivals
69%
arrived < 15 min late
Cancelled
0.5%
13 flights
Avg arrival delay
18 min
54 min when late
Rank on route
#5 of 5
route average 75% on time
Key facts
- Southwest Airlines flights on DEN to SAN arrived on time 69% of the time in Aug 2025 – Jul 2026.
- 0.5% were cancelled, and 9% arrived an hour or more late.
- That ranks #5 of 5 airlines on this route, which averaged 75% on time overall.
- The largest source of delay minutes was late-arriving aircraft (50%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft50%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion19%
- Extreme weather1%
- Security0%
Other airlines on DEN to SAN
- United Airlines80% on time · 12 min avg delay
- Frontier Airlines81% on time · 14 min avg delay
- Alaska Airlines84% on time · 10 min avg delay
- SkyWest Airlines71% on time · 14 min avg delay
Full DEN to SAN comparison →
Southwest Airlines on-time record across all routes →
2,388 Southwest Airlines flights tracked on this route; 13 cancelled, 8 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.