Flight OddsUA3997 IAD → SAT
United Airlines · Washington, DC to San Antonio, TX · 3 flights observed, 2026-05-02 to 2026-05-16 · 1,362 mi
UA3997 covers more than one route in the data window — the stats below are for IAD → SAT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
67%
Median delay
-7 min
90th percentile
+32 min
Cancellation rate
0%
How often is UA3997 on time?
Across 3 flights on IAD → SAT from 2026-05-02 to 2026-05-16, UA3997 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +32 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 | 2 | 67% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 33% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 3 | 67% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | No data | — |
| Wed | No data | — |
| Thu | No data | — |
| Fri | No data | — |
| Sat | 3 | 67% |
| 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…