Flight OddsDL3953 PDX → SEA
Delta Air Lines · Portland, OR to Seattle, WA · 365 flights observed, 2025-07-01 to 2026-06-30 · 129 mi
DL3953 covers more than one route in the data window — the stats below are for PDX → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
83%
Median delay
-9 min
90th percentile
+29 min
Cancellation rate
1%
How often is DL3953 on time?
Across 365 flights on PDX → SEA from 2025-07-01 to 2026-06-30, DL3953 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +29 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 300 | 83% |
| 16-30 min | 29 | 8% |
| 31-60 min | 19 | 5% |
| 61-120 min | 12 | 3% |
| 2+ hrs | 3 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 71% | +8 min |
| 2025-08 | 31 | 84% | -4 min |
| 2025-09 | 30 | 87% | -4 min |
| 2025-10 | 31 | 84% | -1 min |
| 2025-11 | 29 | 86% | -7 min |
| 2025-12 | 31 | 74% | +5 min |
| 2026-01 | 31 | 87% | -1 min |
| 2026-02 | 28 | 96% | -5 min |
| 2026-03 | 30 | 83% | +3 min |
| 2026-04 | 30 | 80% | -9 min |
| 2026-05 | 31 | 84% | -5 min |
| 2026-06 | 30 | 77% | +5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 52 | 87% |
| Tue | 53 | 83% |
| Wed | 52 | 87% |
| Thu | 52 | 75% |
| Fri | 51 | 82% |
| Sat | 52 | 77% |
| Sun | 51 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…