Delta Air Lines Atlanta, GA (ATL) to Seattle, WA (SEA) reliability

Among 2,371 scheduled Delta Air Lines flights from ATL to SEA, 78.5% arrived on time, 11.3% arrived at least 30 minutes late, and 0.5% 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

78.5%arrived on time

11.3%30+ min late

0.5%cancelled

2,371scheduled flights

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

30+ minutes late11.3%

60+ minutes late4.6%

Cancelled0.5%

Average arrival+3.4 mincompleted flights

What did Delta Air Lines ATL to SEA record?

Delta Air Lines completed 99.2% of its scheduled reportable ATL to SEA flights in the observation window. 78.5% of all scheduled flights arrived less than 15 minutes late, while 4.6% arrived at least an hour late.

What were Delta Air Lines ATL to SEA disruption rates?

For Delta Air Lines ATL-to-SEA flights, 11.3% arrived at least 30 minutes late, 0.5% were cancelled, and 0.3% were diverted.

Compare all airlines on this route

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

The Delta Air Lines ATL-to-SEA cohort contained 2,371 scheduled flights; 2,352 completed, 11 were cancelled, and 8 were diverted.

Not a prediction.

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