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 4479
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Tomorrow
WN 4479 · DCA → MDW
departs 4:30 PM ET · arrives 5:35 PM CT
Forecast issued Fri 2:00 PM ET · 26h before departure
Watch this flight
Other days
Today 35%
Sat 10/3
Sun 10/4 33%
Mon 10/5 17%
Wed 10/7 17%
Odds over time
Arrive at MDW more than 15 minutes late?
12%
chance · ±1 pts
−3 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
12%
Leave 15+ late
26%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.8d
2d
Now
12h
6h
Departs
Lands
Arrive at MDW more than 15 minutes late?
Calm-weather odds: 10% · changed −3 pts in 24h
−3 pts
12%
Yes 12%
No 88%
Leave DCA more than 15 minutes late?
Calm-weather odds: 20% · changed −2 pts in 24h
−2 pts
26%
Yes 26%
No 74%
Arrive at MDW more than an hour late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to MDW?
On time or early
87%
15–30 min late
4%
30 min–1 hour late
2%
1–2 hours late
4%
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
↑
4pm departures from DCA are often late
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into MDW at that hour are often late
↓
Saturdays in October are usually quieter than average
↓
Mostly benign weather forecast at MDW
Weather at each end
DCA (origin)
Gusts 14 kt Ceiling 2,200 ft Visibility 6 mi Precip 0.03 in
MDW (destination)
Gusts 8 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.