About 1 in 7 DL 4145 flights from Seattle arrived 15+ minutes late, diverted or cancelled over the past year (15%); 0.5% were cancelled. The typical flight landed 10 minutes early.
DL 4145: SEA → GEG
Scheduled to leave Seattle at 1:30 p.m. local time, operated by SkyWest as OO 4145. Over the past year it arrived on time 85% of the time (365 flights), worse than other DL flights on the route at that hour (89%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 81% |
| Tuesday | 52 | 92% |
| Wednesday | 52 | 92% |
| Thursday | 52 | 75% |
| Friday | 52 | 79% |
| Saturday | 52 | 88% |
| Sunday | 52 | 88% |
Why it was late
All flights SEA → GEG · Connecting off DL 4145? Check the risk
Questions
How often is DL 4145 from SEA to GEG late?
Delta Air Lines 4145 from Seattle, WA to Spokane, WA arrived 15 or more minutes late, was diverted or was cancelled on 15% of 365 scheduled flights between September 2025 and August 2026. 0.5% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.