Delta Air Lines Salt Lake City, UT (SLC) to Seattle, WA (SEA) reliability

Among 2,222 scheduled Delta Air Lines flights from SLC to SEA, 82.8% arrived on time, 9.4% 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 SIGNALLower disruption

82.8%arrived on time

9.4%30+ min late

0.5%cancelled

2,222scheduled flights

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

30+ minutes late9.4%

60+ minutes late4.4%

Cancelled0.5%

Average arrival+0.1 mincompleted flights

What did Delta Air Lines SLC to SEA record?

Delta Air Lines completed 99.5% of its scheduled reportable SLC to SEA flights in the observation window. 82.8% of all scheduled flights arrived less than 15 minutes late, while 4.4% arrived at least an hour late.

What were Delta Air Lines SLC to SEA disruption rates?

For Delta Air Lines SLC-to-SEA flights, 9.4% arrived at least 30 minutes late, 0.5% were cancelled, and 0.0% were diverted.

Compare all airlines on this route

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

The Delta Air Lines SLC-to-SEA cohort contained 2,222 scheduled flights; 2,210 completed, 12 were cancelled, and 0 were diverted.

Not a prediction.

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