Schedule: the flights that flew on Sunday, Oct 25, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

DELTA · FLIGHT DL 2639 SCHEDULED · TYPICAL SCHEDULE

Sunday, November 1 Tomorrow

DL 2639 · JFK → BOS

departs 9:31 PM ET · arrives 10:37 PM ET

Forecast issued Fri 11:00 PM ET · 48h before departure

Arrive at BOS more than 15 minutes late?

30% chance · ±5 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
70%
15–30 min late
13%
30 min–1 hour late
8%
1–2 hours late
7%
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

↑ 9pm departures from JFK are often late

↑ This flight has been late 28% of the time recently

↑ Arrivals into BOS at that hour are often late

↓ Mostly benign weather forecast at JFK

↓ Mostly benign weather forecast at BOS

Weather at each end

JFK (origin) Gusts7 kt Ceilingnone (clear) Visibility10+ mi Precipnone

BOS (destination) Gusts12 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.

DL 2639 · JFK → BOS

Odds over time

How late will it get to BOS?