Flight OddsWN3998 MDW → SAT
Southwest Airlines · Chicago, IL to San Antonio, TX · 33 flights observed, 2026-03-05 to 2026-04-06 · 1,036 mi
WN3998 covers more than one route in the data window — the stats below are for MDW → SAT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
71%
Median delay
-3 min
90th percentile
+78 min
Cancellation rate
6%
How often is WN3998 on time?
Across 33 flights on MDW → SAT from 2026-03-05 to 2026-04-06, WN3998 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +78 min or later. 6% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 22 | 71% |
| 16-30 min | 2 | 6% |
| 31-60 min | 2 | 6% |
| 61-120 min | 3 | 10% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 25 | 76% | +11 min |
| 2026-04 | 6 | 50% | +56 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 3 | 67% |
| Wed | 4 | 100% |
| Thu | 5 | 60% |
| Fri | 5 | 60% |
| Sat | 5 | 40% |
| Sun | 4 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…