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 1187
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
DL 1187 · DTW → BOS
departs 9:59 PM ET · arrives 11:59 PM ET
Forecast issued Fri 5:00 AM ET · 17h before departure
Watch this flight
Other days
Today
Sat 10/3 11%
Sun 10/4 25%
Mon 10/5 28%
Tue 10/6 18%
Wed 10/7 24%
Odds over time
Arrive at BOS more than 15 minutes late?
28%
chance · ±2 pts
+10 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
28%
Leave 15+ late
35%
Arrive 1h+ late
16%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.0d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at BOS more than 15 minutes late?
Calm-weather odds: 16% · changed +10 pts in 24h
+10 pts
28%
Yes 28%
No 72%
Leave DTW more than 15 minutes late?
Calm-weather odds: 26% · changed +8 pts in 24h
+8 pts
35%
Yes 35%
No 65%
Arrive at BOS more than an hour late?
Calm-weather odds: 6% · changed +10 pts in 24h
+10 pts
16%
Yes 16%
No 84%
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
71%
15–30 min late
0%
30 min–1 hour late
12%
1–2 hours late
13%
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
↑
Arrivals into BOS at that hour are often late
↑
Mostly benign weather forecast at BOS
↑
Later flights pick up delays from earlier in the day
↓
DTW usually runs smoothly
↓
Gusts to 27 kt, cloud base down to 1,200 ft, visibility down to 1.5 mi, 2.7 in of rain forecast at DTW that day
Weather at each end
DTW (origin)
Gusts 27 kt Ceiling 1,200 ft Visibility 1.5 mi Precip 2.72 in
BOS (destination)
Gusts 21 kt Ceiling 4,500 ft Visibility 10+ mi Precip 0.08 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.