DL3953 PortlandPDX · 09:31 SeattleSEA · 10:40
DL3953 by Delta Air Lines flies from Portland (PDX) to Seattle (SEA) for the Fri, Oct 30 departure.
departs PDX · 29 min late
Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operation0 cancelled · 8 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at PDX and SEA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
Tomorrow on this route
ForecastPortland to Seattle with Delta Air Lines · Sat 31 Oct, local date
- Chance a departure is cancelled
- 0.4%0.9× usual
- Chance a departure leaves 60+ min late
- 4.9%0.8× usual
Forecast weather: 35% chance of fog at Portland; 30% chance of fog at Seattle
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 8 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Portland to Seattle flights today
same route · Delta Air LinesIf DL3953 is cancelled, these are the other Delta Air Lines nonstop flights from Portland to Seattle on the same day, with scheduled departure times in PDX local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How DL3953 actually runs
Pro Flight Search has tracked every published board update for DL3953 across the PDX and SEA boards: schedule changes, gate pushes and actual clocks. Usually departs ~22 min late. Based on 8 confirmed departures · 2/8 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how DL3953 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as PDX and SEA published them.
Planning around DL3953? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search: DL3953 Portland to Seattle on-time performance, measured from the PDX and SEA airport boards.
https://proflightsearch.com/flight/DL3953
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