BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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BOS→SFO

United Airlines Boston, MA (BOS) to San Francisco, CA (SFO) reliability

Among 1,867 scheduled United Airlines flights from BOS to SFO, 75.3% arrived on time, 15.5% arrived at least 30 minutes late, and 1.1% 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 SIGNALGenerally reliable
75.3%arrived on time
15.5%30+ min late
1.1%cancelled
1,867scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late15.5%
60+ minutes late8.8%
Cancelled1.1%
Average arrival+5.5 mincompleted flights

What did United Airlines BOS to SFO record?

United Airlines completed 98.7% of its scheduled reportable BOS to SFO flights in the observation window. 75.3% of all scheduled flights arrived less than 15 minutes late, while 8.8% arrived at least an hour late.

What were United Airlines BOS to SFO disruption rates?

For United Airlines BOS-to-SFO flights, 15.5% arrived at least 30 minutes late, 1.1% were cancelled, and 0.2% were diverted.

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What was the United Airlines BOS to SFO scheduled cohort?

The United Airlines BOS-to-SFO cohort contained 1,867 scheduled flights; 1,843 completed, 21 were cancelled, and 3 were diverted.

Not a prediction.

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