Flight OddsWN3878 MDW → PHL
Southwest Airlines · Chicago, IL to Philadelphia, PA · 21 flights observed, 2025-07-01 to 2025-08-03 · 668 mi
WN3878 covers more than one route in the data window — the stats below are for MDW → PHL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
76%
Median delay
-2 min
90th percentile
+44 min
Cancellation rate
0%
How often is WN3878 on time?
Across 21 flights on MDW → PHL from 2025-07-01 to 2025-08-03, WN3878 arrived within 15 minutes of schedule 76% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +44 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 16 | 76% |
| 16-30 min | 2 | 10% |
| 31-60 min | 2 | 10% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 19 | 79% | +10 min |
| 2025-08 | 2 | 50% | +11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | 5 | 100% |
| Wed | 5 | 80% |
| Thu | No data | — |
| Fri | 1 | 100% |
| Sat | 5 | 60% |
| Sun | 5 | 60% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…