Schedule: the flights that flew on Saturday, Oct 24, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

UNITED · FLIGHT UA 2331 SCHEDULED · TYPICAL SCHEDULE

Saturday, October 31

UA 2331 · ORD → BOS

departs 6:20 PM CT · arrives 9:56 PM ET

Forecast issued Thu 4:00 PM ET · 51h before departure

Arrive at BOS more than 15 minutes late?

39% chance · ±7 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
61%
15–30 min late
12%
30 min–1 hour late
14%
1–2 hours late
10%
Over 2 hours late
3%
Cancelled
<1%

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

What’s moving the odds

↑ 6pm departures from ORD are often late

↑ Later flights pick up delays from earlier in the day

↑ Arrivals into BOS at that hour are often late

↓ Mostly benign weather forecast at BOS

↓ BOS usually runs smoothly

Weather at each end

ORD (origin) Gusts10 kt Ceiling7,000 ft Visibility10+ mi Precip0.30 in

BOS (destination) Gusts17 kt Ceilingnone (clear) 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 2331 · ORD → BOS

Odds over time

How late will it get to BOS?