Schedule: a typical summer Saturday (the flights of Jul 25, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3308
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Yesterday
WN 3308 · MDW → GRR
departs 8:35 PM CT · arrives 10:40 PM ET
Forecast issued Sat 10:00 PM ET · 0h before departure
Watch this flight
Odds over time
Arrive at GRR more than 15 minutes late?
20%
chance · ±1 pts
+1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
20%
Leave 15+ late
34%
Arrive 1h+ late
4%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.0d
2d
1d
12h
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 20% · changed +1 pt in 24h
+1 pt
20%
Yes 20%
No 80%
Leave MDW more than 15 minutes late?
Calm-weather odds: 34% · changed +6 pts in 24h
+6 pts
34%
Yes 34%
No 66%
Arrive at GRR more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to GRR?
On time or early
79%
15–30 min late
9%
30 min–1 hour late
7%
1–2 hours late
3%
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
↑
WN's recent on-time record
↑
Later flights pick up delays from earlier in the day
↑
8pm departures from MDW are often late
↓
Mostly benign weather forecast at MDW
↓
Saturdays in October are usually quieter than average
Weather at each end
MDW (origin)
Gusts 20 kt Ceiling none (clear) Visibility 10+ mi Precip none
GRR (destination)
Gusts 11 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.