Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.

UNITED · FLIGHT UA 2001 SCHEDULED · TYPICAL SCHEDULE

Friday, October 2 Tomorrow

UA 2001 · SFO → BOS

departs 4:15 PM PT · arrives 1:11 AM ET

Forecast issued Thu 10:00 AM ET · 33h before departure

Arrive at BOS more than 15 minutes late?

14% chance · ±2 pts +0 pts · 24h

HOW SURE WE ARE Moderate. The odds now blend history with early weather forecasts.

How late will it get to BOS?

On time or early
85%
15–30 min late
2%
30 min–1 hour late
7%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
<1%

Gate arrival compared with the scheduled arrival. The ranges add up to 100%.

What’s moving the odds

↑ 4pm departures from SFO are often late

↑ Arrivals into BOS at that hour are often late

↑ SFO is prone to delays

↓ Mostly benign weather forecast at BOS

↓ Cloud base down to 100 ft, visibility down to 0.2 mi forecast at SFO that day

Weather at each end

SFO (origin) Gusts8 kt Ceiling1,100 ft Visibility7 mi Precipnone

BOS (destination) Gusts20 kt Ceiling6,000 ft Visibility10+ mi Precipnone

How this resolves

Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.

Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.

UA 2001 · SFO → BOS

Odds over time

How late will it get to BOS?