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.
REPUBLIC · FLIGHT YX 4729
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Tomorrow
YX 4729 · GRR → ORD
departs 7:54 PM ET · arrives 8:37 PM CT
Forecast issued Sat 7:00 AM ET · 37h before departure
Watch this flight
Other days
Today 15%
Sun 10/4
Mon 10/5 11%
Tue 10/6 32%
Wed 10/7 22%
Fri 10/9 19%
Odds over time
Arrive at ORD more than 15 minutes late?
18%
chance · ±4 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
18%
Leave 15+ late
15%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at ORD more than 15 minutes late?
Calm-weather odds: 14% · changed +0 pts in 24h
+0 pts
18%
Yes 18%
No 82%
Leave GRR more than 15 minutes late?
Calm-weather odds: 15% · changed +1 pt in 24h
+1 pt
15%
Yes 15%
No 85%
Arrive at ORD more than an hour late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to ORD?
On time or early
82%
15–30 min late
9%
30 min–1 hour late
3%
1–2 hours late
4%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Arrivals into ORD at that hour are often late
↑
This flight has been late 30% of the time recently
↑
Later flights pick up delays from earlier in the day
↓
Other factors
↓
Mostly benign weather forecast at ORD
Weather at each end
GRR (origin)
Gusts 21 kt Ceiling none (clear) Visibility 10+ mi Precip none
ORD (destination)
Gusts 12 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.