Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SKYWEST · FLIGHT OO 4821
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Yesterday
OO 4821 · DFW → GRI
departs 3:50 PM CT · arrives 5:47 PM CT
Forecast issued Mon 10:00 PM ET · 5h after departure
Watch this flight
Other days
Mon 10/5
Wed 10/7 11%
Thu 10/8 18%
Fri 10/9 20%
Sat 10/10 22%
Sun 10/11 27%
Odds over time
Arrive at GRI more than 15 minutes late?
28%
chance · ±0 pts
−3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
28%
Leave 15+ late
28%
Arrive 1h+ late
8%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.7d
2d
1d
12h
6h
Departs
Lands
Arrive at GRI more than 15 minutes late?
Calm-weather odds: 28% · changed −3 pts in 24h
−3 pts
28%
Yes 28%
No 72%
Leave DFW more than 15 minutes late?
Calm-weather odds: 28% · changed −1 pt in 24h
−1 pt
28%
Yes 28%
No 72%
Arrive at GRI more than an hour late?
Calm-weather odds: 8% · changed −1 pt in 24h
−1 pt
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to GRI?
On time or early
71%
15–30 min late
11%
30 min–1 hour late
9%
1–2 hours late
4%
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
↑
OO's recent on-time record
↑
3pm departures from DFW are often late
↑
DFW is busy at that time
↓
Mostly benign weather forecast at DFW
↓
Mondays in October are usually quieter than average
Weather at each end
DFW (origin)
Gusts 18 kt Ceiling 6,000 ft Visibility 10+ mi Precip none
GRI (destination)
Gusts 24 kt Ceiling none (clear) Visibility 9 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.