Delta Air Lines Seattle, WA (SEA) to Raleigh/Durham, NC (RDU) reliability

Among 364 scheduled Delta Air Lines flights from SEA to RDU, 75.5% arrived on time, 11.5% arrived at least 30 minutes late, and 1.4% 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 SIGNALGenerally reliable

75.5%arrived on time

11.5%30+ min late

1.4%cancelled

364scheduled flights

Based on July 2025–June 2026; on time means arrival less than 15 minutes late.

30+ minutes late11.5%

60+ minutes late5.8%

Cancelled1.4%

Average arrival+3.9 mincompleted flights

What did Delta Air Lines SEA to RDU record?

Delta Air Lines completed 98.4% of its scheduled reportable SEA to RDU flights in the observation window. 75.5% of all scheduled flights arrived less than 15 minutes late, while 5.8% arrived at least an hour late.

What were Delta Air Lines SEA to RDU disruption rates?

For Delta Air Lines SEA-to-RDU flights, 11.5% arrived at least 30 minutes late, 1.4% were cancelled, and 0.3% were diverted.

Compare all airlines on this route

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

The Delta Air Lines SEA-to-RDU cohort contained 364 scheduled flights; 358 completed, 5 were cancelled, and 1 were diverted.

Not a prediction.

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