Flight OddsSouthwest Airlines · Chicago, IL to San Francisco, CA · 58 flights observed, 2026-04-07 to 2026-06-03 · 1,855 mi
WN3917 covers more than one route in the data window — the stats below are for MDW → SFO, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN3917 on time?
Across 58 flights on MDW → SFO from 2026-04-07 to 2026-06-03, WN3917 arrived within 15 minutes of schedule 21% of the time. The median arrival delay was +45 min, and the worst 10% of flights arrived +107 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 | 12 | 21% |
| 16-30 min | 9 | 16% |
| 31-60 min | 23 | 40% |
| 61-120 min | 8 | 14% |
| 2+ hrs | 6 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 24 | 29% | +36 min |
| 2026-05 | 31 | 13% | +62 min |
| 2026-06 | 3 | 33% | +23 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 13% |
| Tue | 9 | 11% |
| Wed | 9 | 22% |
| Thu | 8 | 13% |
| Fri | 8 | 13% |
| Sat | 8 | 50% |
| Sun | 8 | 25% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…