Flight OddsWN1877 SJC → MDW
Southwest Airlines · San Jose, CA to Chicago, IL · 42 flights observed, 2026-04-07 to 2026-06-03 · 1,838 mi
WN1877 covers more than one route in the data window — the stats below are for SJC → MDW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
49%
Median delay
+16 min
90th percentile
+44 min
Cancellation rate
0%
How often is WN1877 on time?
Across 42 flights on SJC → MDW from 2026-04-07 to 2026-06-03, WN1877 arrived within 15 minutes of schedule 49% of the time. The median arrival delay was +16 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 | 20 | 49% |
| 16-30 min | 11 | 27% |
| 31-60 min | 8 | 20% |
| 61-120 min | 2 | 5% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 18 | 67% | +8 min |
| 2026-05 | 20 | 30% | +29 min |
| 2026-06 | 3 | 67% | +7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 43% |
| Tue | 9 | 44% |
| Wed | 9 | 56% |
| Thu | 8 | 50% |
| Fri | 8 | 50% |
| Sat | No data | — |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…