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.
DELTA · FLIGHT DL 2639
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 31 Today
DL 2639 · JFK → BOS
departs 9:31 PM ET · arrives 10:37 PM ET
Forecast issued Fri 11:00 PM ET · 22h before departure
Watch this flight
Other days
Today
Sun 11/1 30%
Mon 11/2 30%
Tue 11/3 26%
Wed 11/4 31%
Thu 11/5 41%
Odds over time
Arrive at BOS more than 15 minutes late?
20%
chance · ±3 pts
−1 pt · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
20%
Leave 15+ late
22%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.9d
2d
Now
12h
6h
Departs
Lands
Arrive at BOS more than 15 minutes late?
Calm-weather odds: 25% · changed −1 pt in 24h
−1 pt
20%
Yes 20%
No 80%
Leave JFK more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
22%
Yes 22%
No 78%
Arrive at BOS more than an hour late?
Calm-weather odds: 7% · changed +0 pts in 24h
+0 pts
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to BOS?
On time or early
79%
15–30 min late
8%
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
↑
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)
Gusts 14 kt Ceiling none (clear) Visibility 10+ mi Precip none
BOS (destination)
Gusts 19 kt Ceiling none (clear) Visibility 10+ mi Precip none
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.