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.
ENVOY · FLIGHT MQ 3559
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
MQ 3559 · GSP → ORD
departs 7:20 PM ET · arrives 8:51 PM CT
Forecast issued Wed 8:00 AM ET · 35h before departure
Watch this flight
Other days
Today 47%
Thu 10/1
Fri 10/2 39%
Sat 10/3 33%
Sun 10/4 33%
Mon 10/5 32%
Tue 10/6 41%
Odds over time
Arrive at ORD more than 15 minutes late?
71%
chance · ±10 pts
−3 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
71%
Leave 15+ late
52%
Arrive 1h+ late
31%
Cancelled
7%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
25%
50%
75%
100%
2.8d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at ORD more than 15 minutes late?
Calm-weather odds: 24% · changed −3 pts in 24h
−3 pts
71%
Yes 71%
No 29%
Leave GSP more than 15 minutes late?
Calm-weather odds: 18% · changed +4 pts in 24h
+4 pts
52%
Yes 52%
No 48%
Arrive at ORD more than an hour late?
Calm-weather odds: 5% · changed +3 pts in 24h
+3 pts
31%
Yes 31%
No 69%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
7%
Yes 7%
No 93%
How late will it get to ORD?
On time or early
27%
15–30 min late
3%
30 min–1 hour late
34%
1–2 hours late
19%
Over 2 hours late
10%
Cancelled
7%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 500 ft, visibility down to 2 mi, 1.2 in of rain forecast at ORD that day
↑
Arrivals into ORD at that hour are often late
↑
ORD is busy at that time
↓
Other factors
↓
Mostly benign weather forecast at GSP
Weather at each end
GSP (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
ORD (destination)
Gusts 12 kt Ceiling 500 ft Visibility 2 mi Precip 1.23 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.