Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
ENVOY · FLIGHT MQ 3991
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
MQ 3991 · BNA → DCA
departs 3:30 PM CT · arrives 6:26 PM ET
Forecast issued Tue 3:00 PM ET · 2h before departure
Watch this flight
Other days
Today
Wed 9/30 15%
Thu 10/1 15%
Fri 10/2 25%
Sun 10/4 18%
Mon 10/5 23%
Odds over time
Arrive at DCA more than 15 minutes late?
18%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
18%
Leave 15+ late
13%
Arrive 1h+ late
3%
Cancelled
2%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at DCA more than 15 minutes late?
Calm-weather odds: 17% · changed +0 pts in 24h
+0 pts
18%
Yes 18%
No 82%
Leave BNA more than 15 minutes late?
Calm-weather odds: 13% · changed +2 pts in 24h
+2 pts
13%
Yes 13%
No 87%
Arrive at DCA more than an hour late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: 2% · changed +1 pt in 24h
+1 pt
2%
Yes 2%
No 98%
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
<1%
Cancelled
2%
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
↑
3pm departures from BNA are often late
↑
BNA is busy at that time
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at DCA
Weather at each end
BNA (origin)
Gusts 4 kt Ceiling none (clear) Visibility 10+ mi Precip none
DCA (destination)
Gusts 7 kt Ceiling 4,000 ft 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.