Southwest Airlines MDW to PHL on-time performance
Southwest Airlines nonstop flights from Chicago to Philadelphia · Aug 2025 – Jul 2026
On-time arrivals
76%
arrived < 15 min late
Cancelled
1.7%
25 flights
Avg arrival delay
15 min
59 min when late
Rank on route
#2 of 2
route average 76% on time
Key facts
- Southwest Airlines flights on MDW to PHL arrived on time 76% of the time in Aug 2025 – Jul 2026.
- 1.7% were cancelled, and 6% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (31%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion31%
- Late-arriving aircraft31%
- Extreme weather6%
- Security1%
Other airlines on MDW to PHL
- Frontier Airlines84% on time · 27 min avg delay
Full MDW to PHL comparison →
Southwest Airlines on-time record across all routes →
1,454 Southwest Airlines flights tracked on this route; 25 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.