Southwest Airlines PHL to DEN on-time performance
Southwest Airlines nonstop flights from Philadelphia to Denver · Aug 2025 – Jul 2026
On-time arrivals
69%
arrived < 15 min late
Cancelled
1.1%
10 flights
Avg arrival delay
19 min
54 min when late
Rank on route
#3 of 4
route average 75% on time
Key facts
- Southwest Airlines flights on PHL to DEN arrived on time 69% of the time in Aug 2025 – Jul 2026.
- 1.1% were cancelled, and 8% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 75% on time overall.
- The largest source of delay minutes was late-arriving aircraft (35%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft35%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion29%
- Extreme weather3%
- Security0%
Other airlines on PHL to DEN
- United Airlines84% on time · 14 min avg delay
- American Airlines73% on time · 18 min avg delay
- Frontier Airlines67% on time · 38 min avg delay
Full PHL to DEN comparison →
Southwest Airlines on-time record across all routes →
879 Southwest Airlines flights tracked on this route; 10 cancelled, 6 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.