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

Among 2,219 scheduled Delta Air Lines flights from SEA to SLC, 86.4% arrived on time, 7.5% 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

86.4%arrived on time

7.5%30+ min late

0.5%cancelled

2,219scheduled flights

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

30+ minutes late7.5%

60+ minutes late4.1%

Cancelled0.5%

Average arrival-1.4 mincompleted flights

What did Delta Air Lines SEA to SLC record?

Delta Air Lines completed 99.4% of its scheduled reportable SEA to SLC flights in the observation window. 86.4% of all scheduled flights arrived less than 15 minutes late, while 4.1% arrived at least an hour late.

What were Delta Air Lines SEA to SLC disruption rates?

For Delta Air Lines SEA-to-SLC flights, 7.5% arrived at least 30 minutes late, 0.5% were cancelled, and 0.1% were diverted.

Compare all airlines on this route

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

The Delta Air Lines SEA-to-SLC cohort contained 2,219 scheduled flights; 2,205 completed, 12 were cancelled, and 2 were diverted.

Not a prediction.

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