Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SKYWEST · FLIGHT OO 3988
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Today
OO 3988 · DTW → IAD
departs 9:38 PM ET · arrives 11:13 PM ET
Forecast issued Thu 2:00 AM ET · 20h before departure
Watch this flight
Other days
Today
Fri 10/2 18%
Sat 10/3 11%
Sun 10/4 18%
Mon 10/5 16%
Tue 10/6 14%
Wed 10/7 14%
Odds over time
Arrive at IAD more than 15 minutes late?
34%
chance · ±2 pts
+8 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
34%
Leave 15+ late
43%
Arrive 1h+ late
16%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at IAD more than 15 minutes late?
Calm-weather odds: 19% · changed +8 pts in 24h
+8 pts
34%
Yes 34%
No 66%
Leave DTW more than 15 minutes late?
Calm-weather odds: 28% · changed +12 pts in 24h
+12 pts
43%
Yes 43%
No 57%
Arrive at IAD more than an hour late?
Calm-weather odds: 10% · changed +6 pts in 24h
+6 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 IAD?
On time or early
65%
15–30 min late
12%
30 min–1 hour late
6%
1–2 hours late
12%
Over 2 hours late
4%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 500 ft forecast at DTW that day
↑
OO's recent on-time record
↑
This flight has been late 31% of the time recently
↓
DTW usually runs smoothly
↓
Mostly benign weather forecast at IAD
Weather at each end
DTW (origin)
Gusts 18 kt Ceiling 500 ft Visibility 3 mi Precip 0.19 in
IAD (destination)
Gusts 9 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.