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

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

Among 1,866 scheduled United Airlines flights from SFO to BOS, 78.1% arrived on time, 14.8% arrived at least 30 minutes late, and 1.0% 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
78.1%arrived on time
14.8%30+ min late
1.0%cancelled
1,866scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late14.8%
60+ minutes late8.9%
Cancelled1.0%
Average arrival+3.8 mincompleted flights

What did United Airlines SFO to BOS record?

United Airlines completed 98.8% of its scheduled reportable SFO to BOS flights in the observation window. 78.1% of all scheduled flights arrived less than 15 minutes late, while 8.9% arrived at least an hour late.

What were United Airlines SFO to BOS disruption rates?

For United Airlines SFO-to-BOS flights, 14.8% arrived at least 30 minutes late, 1.0% were cancelled, and 0.2% were diverted.

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What was the United Airlines SFO to BOS scheduled cohort?

The United Airlines SFO-to-BOS cohort contained 1,866 scheduled flights; 1,844 completed, 19 were cancelled, and 3 were diverted.

Not a prediction.

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