BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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AIRLINE × ROUTE REPORT
SEA→DCA

Delta Air Lines Seattle, WA (SEA) to Washington, DC (DCA) reliability

Among 365 scheduled Delta Air Lines flights from SEA to DCA, 89.0% arrived on time, 5.5% arrived at least 30 minutes late, and 3.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Marketing carrier: Delta Air Lines (DL) · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
89.0%arrived on time
5.5%30+ min late
3.0%cancelled
365scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late5.5%
60+ minutes late3.3%
Cancelled3.0%
Average arrival-2.8 mincompleted flights

What did Delta Air Lines SEA to DCA record?

Delta Air Lines completed 96.7% of its scheduled reportable SEA to DCA flights in the observation window. 89.0% of all scheduled flights arrived less than 15 minutes late, while 3.3% arrived at least an hour late.

What were Delta Air Lines SEA to DCA disruption rates?

For Delta Air Lines SEA-to-DCA flights, 5.5% arrived at least 30 minutes late, 3.0% were cancelled, and 0.3% were diverted.

Compare all airlines on this route

What was the Delta Air Lines SEA to DCA scheduled cohort?

The Delta Air Lines SEA-to-DCA cohort contained 365 scheduled flights; 353 completed, 11 were cancelled, and 1 were diverted.

Not a prediction.

This is a descriptive historical rate. Schedule changes, seasonal operations and current conditions may differ.