Southwest Airlines PHL to MDW on-time performance
Southwest Airlines nonstop flights from Philadelphia to Chicago · Aug 2025 – Jul 2026
On-time arrivals
74%
arrived < 15 min late
Cancelled
1.7%
25 flights
Avg arrival delay
20 min
71 min when late
Rank on route
#2 of 2
route average 75% on time
Key facts
- Southwest Airlines flights on PHL to MDW arrived on time 74% of the time in Aug 2025 – Jul 2026.
- 1.7% were cancelled, and 8% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 75% on time overall.
- The largest source of delay minutes was late-arriving aircraft (47%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft47%
- Air traffic control & airport congestion28%
- Airline (crew, maintenance, cleaning, fueling)21%
- Extreme weather3%
- Security0%
Other airlines on PHL to MDW
- Frontier Airlines84% on time · 12 min avg delay
Full PHL to MDW comparison →
Southwest Airlines on-time record across all routes →
1,455 Southwest Airlines flights tracked on this route; 25 cancelled, 12 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.