Schedule: the flights that flew on Thursday, Oct 22, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 1661
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 29
DL 1661 · BOS → DCA
departs 2:29 PM ET · arrives 4:16 PM ET
Forecast issued Tue 2:00 AM ET · 60h before departure
Watch this flight
Other days
Today 22%
Wed 10/28 15%
Thu 10/29
Fri 10/30 47%
Sun 11/1 33%
Mon 11/2 25%
Odds over time
Arrive at DCA more than 15 minutes late?
18%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
18%
Leave 15+ late
21%
Arrive 1h+ late
4%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
6.6d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at DCA more than 15 minutes late?
Calm-weather odds: 17% · changed – in 24h
–
18%
Yes 18%
No 82%
Leave BOS more than 15 minutes late?
Calm-weather odds: 22% · changed – in 24h
–
21%
Yes 21%
No 79%
Arrive at DCA more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to DCA?
On time or early
81%
15–30 min late
8%
30 min–1 hour late
6%
1–2 hours late
2%
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
↑
Arrivals into DCA at that hour are often late
↑
This flight has been late 26% of the time recently
↑
2pm departures from BOS are often late
↓
Mostly benign weather forecast at DCA
↓
Mostly benign weather forecast at BOS
Weather at each end
BOS (origin)
Gusts 19 kt Ceiling none (clear) Visibility 10+ mi Precip none
DCA (destination)
Gusts 8 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.