Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ENVOY · FLIGHT MQ 3556
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
MQ 3556 · ORD → GSP
departs 8:00 AM CT · arrives 11:01 AM ET
Forecast issued Thu 10:00 PM ET · 59h before departure
Watch this flight
Other days
Today 19%
Fri 10/2 26%
Sat 10/3 8%
Sun 10/4
Mon 10/5 9%
Tue 10/6 7%
Wed 10/7 13%
Odds over time
Arrive at GSP more than 15 minutes late?
10%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
10%
Leave 15+ late
8%
Arrive 1h+ late
3%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
5.5d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at GSP more than 15 minutes late?
Calm-weather odds: 5% · changed – in 24h
–
10%
Yes 10%
No 90%
Leave ORD more than 15 minutes late?
Calm-weather odds: 8% · changed – in 24h
–
8%
Yes 8%
No 92%
Arrive at GSP more than an hour late?
Calm-weather odds: 2% · changed – in 24h
–
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
1%
Yes 1%
No 99%
How late will it get to GSP?
On time or early
89%
15–30 min late
5%
30 min–1 hour late
3%
1–2 hours late
2%
Over 2 hours late
<1%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 200 ft, visibility down to 1 mi, 1.3 in of rain forecast at GSP that day
↑
8am departures from ORD are often late
↓
Mostly benign weather forecast at ORD
↓
GSP usually runs smoothly
Weather at each end
ORD (origin)
Gusts 13 kt Ceiling none (clear) Visibility 10+ mi Precip none
GSP (destination)
Gusts 14 kt Ceiling 200 ft Visibility 1 mi Precip 1.34 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.