Southwest Airlines DEN to PHL on-time performance
Southwest Airlines nonstop flights from Denver to Philadelphia · Aug 2025 – Jul 2026
On-time arrivals
63%
arrived < 15 min late
Cancelled
0.8%
7 flights
Avg arrival delay
23 min
56 min when late
Rank on route
#4 of 4
route average 74% on time
Key facts
- Southwest Airlines flights on DEN to PHL arrived on time 63% of the time in Aug 2025 – Jul 2026.
- 0.8% were cancelled, and 11% arrived an hour or more late.
- That ranks #4 of 4 airlines on this route, which averaged 74% on time overall.
- The largest source of delay minutes was late-arriving aircraft (49%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft49%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion23%
- Extreme weather2%
- Security0%
Other airlines on DEN to PHL
- United Airlines80% on time · 14 min avg delay
- American Airlines79% on time · 23 min avg delay
- Frontier Airlines66% on time · 33 min avg delay
Full DEN to PHL comparison →
Southwest Airlines on-time record across all routes →
879 Southwest Airlines flights tracked on this route; 7 cancelled, 1 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.