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.
REPUBLIC · FLIGHT YX 4640
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
YX 4640 · ORD → MDT
departs 9:18 PM CT · arrives 12:22 AM ET
Forecast issued Sun 3:00 AM ET · 43h before departure
Watch this flight
Other days
Today 16%
Mon 10/5
Fri 10/9 15%
Odds over time
Arrive at MDT more than 15 minutes late?
9%
chance · ±1 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
9%
Leave 15+ late
9%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.9d
Now
1d
12h
6h
Departs
Lands
Arrive at MDT more than 15 minutes late?
Calm-weather odds: 9% · changed −1 pt in 24h
−1 pt
9%
Yes 9%
No 91%
Leave ORD more than 15 minutes late?
Calm-weather odds: 8% · changed +0 pts in 24h
+0 pts
9%
Yes 9%
No 91%
Arrive at MDT more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to MDT?
On time or early
91%
15–30 min late
4%
30 min–1 hour late
2%
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
↑
9pm departures from ORD are often late
↑
Later flights pick up delays from earlier in the day
↑
MDT is prone to delays
↓
Mostly benign weather forecast at ORD
↓
Mondays in October are usually quieter than average
Weather at each end
ORD (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
MDT (destination)
Gusts 20 kt Ceiling 900 ft Visibility 3.66667 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.