Flight OddsAA991 SFO → ORD
American Airlines · San Francisco, CA to Chicago, IL · 28 flights observed, 2025-08-06 to 2025-09-02 · 1,846 mi
AA991 covers more than one route in the data window — the stats below are for SFO → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
63%
Median delay
-3 min
90th percentile
+37 min
Cancellation rate
4%
How often is AA991 on time?
Across 28 flights on SFO → ORD from 2025-08-06 to 2025-09-02, AA991 arrived within 15 minutes of schedule 63% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +37 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 17 | 63% |
| 16-30 min | 6 | 22% |
| 31-60 min | 2 | 7% |
| 61-120 min | 2 | 7% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 25 | 64% | +9 min |
| 2025-09 | 2 | 50% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 67% |
| Tue | 4 | 75% |
| Wed | 4 | 100% |
| Thu | 4 | 50% |
| Fri | 4 | 50% |
| Sat | 4 | 50% |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…