Delta Air Lines departures from Seattle, WA (SEA)

Among 32,257 scheduled Delta Air Lines flights departing SEA, 80.3% arrived on time, 11.0% arrived at least 30 minutes late, and 1.1% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Origin and marketing-carrier cohort · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption

80.3%arrived on time

11.0%30+ min late

1.1%cancelled

32,257scheduled flights

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

30+ minutes late11.0%

60+ minutes late5.5%

Cancelled1.1%

Diverted0.4%

What does the Delta Air Lines SEA sample show?

Delta Air Lines completed 98.6% of its scheduled departures from SEA; 5.5% arrived at least one hour late and 0.4% were diverted.

What were Delta Air Lines at SEA disruption rates?

For Delta Air Lines departures from SEA, 11.0% arrived at least 30 minutes late, 1.1% were cancelled, and 0.4% were diverted.

Compare all airlines at SEA

How large was the Delta Air Lines cohort at SEA?

The Delta Air Lines cohort at SEA contained 32,257 scheduled flights, including 31,795 completed flights, 340 cancellations, and 122 diversions.