BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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AIRLINE × ROUTE REPORT
SEA→IAD

United Airlines Seattle, WA (SEA) to Washington, DC (IAD) reliability

Among 690 scheduled United Airlines flights from SEA to IAD, 85.2% arrived on time, 8.4% arrived at least 30 minutes late, and 0.7% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Marketing carrier: United Airlines (UA) · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
85.2%arrived on time
8.4%30+ min late
0.7%cancelled
690scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late8.4%
60+ minutes late5.9%
Cancelled0.7%
Average arrival-3.9 mincompleted flights

What did United Airlines SEA to IAD record?

United Airlines completed 98.6% of its scheduled reportable SEA to IAD flights in the observation window. 85.2% of all scheduled flights arrived less than 15 minutes late, while 5.9% arrived at least an hour late.

What were United Airlines SEA to IAD disruption rates?

For United Airlines SEA-to-IAD flights, 8.4% arrived at least 30 minutes late, 0.7% were cancelled, and 0.7% were diverted.

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What was the United Airlines SEA to IAD scheduled cohort?

The United Airlines SEA-to-IAD cohort contained 690 scheduled flights; 680 completed, 5 were cancelled, and 5 were diverted.

Not a prediction.

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