Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 2646
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Tomorrow
DL 2646 · ORD → BOS
departs 7:25 PM CT · arrives 11:00 PM ET
Forecast issued Thu 11:00 PM ET · 21h before departure
Watch this flight
Other days
Today
Sat 10/3 17%
Sun 10/4 50%
Mon 10/5 36%
Tue 10/6 29%
Wed 10/7 36%
Thu 10/8 24%
Odds over time
Arrive at BOS more than 15 minutes late?
37%
chance · ±1 pts
−4 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
37%
Leave 15+ late
42%
Arrive 1h+ late
14%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.9d
2d
Now
12h
6h
Departs
Lands
Arrive at BOS more than 15 minutes late?
Calm-weather odds: 25% · changed −4 pts in 24h
−4 pts
37%
Yes 37%
No 63%
Leave ORD more than 15 minutes late?
Calm-weather odds: 35% · changed −4 pts in 24h
−4 pts
42%
Yes 42%
No 58%
Arrive at BOS more than an hour late?
Calm-weather odds: 8% · changed −4 pts in 24h
−4 pts
14%
Yes 14%
No 86%
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
62%
15–30 min late
4%
30 min–1 hour late
19%
1–2 hours late
9%
Over 2 hours late
5%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Arrivals into BOS at that hour are often late
↑
7pm departures from ORD are often late
↑
Later flights pick up delays from earlier in the day
↓
Mostly benign weather forecast at ORD
↓
DL's recent on-time record
Weather at each end
ORD (origin)
Gusts 15 kt Ceiling 3,500 ft Visibility 4.71429 mi Precip 0.24 in
BOS (destination)
Gusts 22 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.05 in
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.