Flight OddsDL3997 SEA → PDX
Delta Air Lines · Seattle, WA to Portland, OR · 197 flights observed, 2025-07-01 to 2026-06-06 · 129 mi
DL3997 covers more than one route in the data window — the stats below are for SEA → PDX, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
91%
Median delay
-11 min
90th percentile
+14 min
Cancellation rate
0%
How often is DL3997 on time?
Across 197 flights on SEA → PDX from 2025-07-01 to 2026-06-06, DL3997 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +14 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 | 179 | 91% |
| 16-30 min | 8 | 4% |
| 31-60 min | 5 | 3% |
| 61-120 min | 3 | 2% |
| 2+ hrs | 2 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 27 | 81% | +2 min |
| 2025-08 | 29 | 97% | -11 min |
| 2025-09 | 30 | 93% | -9 min |
| 2025-10 | 27 | 89% | -8 min |
| 2025-11 | 16 | 100% | -15 min |
| 2025-12 | 16 | 94% | -4 min |
| 2026-04 | 16 | 88% | +11 min |
| 2026-05 | 30 | 90% | +1 min |
| 2026-06 | 6 | 83% | +4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 30 | 90% |
| Tue | 30 | 100% |
| Wed | 30 | 83% |
| Thu | 30 | 87% |
| Fri | 30 | 87% |
| Sat | 18 | 94% |
| Sun | 29 | 97% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…