Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
ENVOY · FLIGHT MQ 3559
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
MQ 3559 · GSP → ORD
departs 7:20 PM ET · arrives 8:51 PM CT
Forecast issued Wed 4:00 AM ET · 15h before departure
Watch this flight
Other days
Today
Thu 10/1 73%
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?
61%
chance · ±3 pts
+7 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
61%
Leave 15+ late
42%
Arrive 1h+ late
24%
Cancelled
5%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at ORD more than 15 minutes late?
Calm-weather odds: 20% · changed +7 pts in 24h
+7 pts
61%
Yes 61%
No 39%
Leave GSP more than 15 minutes late?
Calm-weather odds: 13% · changed +5 pts in 24h
+5 pts
42%
Yes 42%
No 58%
Arrive at ORD more than an hour late?
Calm-weather odds: 5% · changed +4 pts in 24h
+4 pts
24%
Yes 24%
No 76%
Cancelled?
Calm-weather odds: <1% · changed +1 pt in 24h
+1 pt
5%
Yes 5%
No 95%
How late will it get to ORD?
On time or early
37%
15–30 min late
10%
30 min–1 hour late
26%
1–2 hours late
17%
Over 2 hours late
5%
Cancelled
5%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 700 ft, visibility down to 2 mi, 0.9 in of rain forecast at ORD that day
↑
Arrivals into ORD at that hour are often late
↑
ORD is busy at that time
↓
Wednesdays in September are usually quieter than average
↓
Other factors
Weather at each end
GSP (origin)
Gusts 6 kt Ceiling none (clear) Visibility 10+ mi Precip none
ORD (destination)
Gusts 20 kt Ceiling 700 ft Visibility 2 mi Precip 0.93 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.