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.
SOUTHWEST · FLIGHT WN 4479
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 4479 · DCA → MDW
departs 3:10 PM ET · arrives 4:15 PM CT
Forecast issued Fri 7:00 PM ET · 44h before departure
Watch this flight
Other days
Today 26%
Sat 10/3 16%
Sun 10/4
Mon 10/5 17%
Odds over time
Arrive at MDW more than 15 minutes late?
30%
chance · ±0 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
30%
Leave 15+ late
42%
Arrive 1h+ late
11%
Cancelled
3%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.7d
Now
1d
12h
6h
Departs
Lands
Arrive at MDW more than 15 minutes late?
Calm-weather odds: 16% · changed +0 pts in 24h
+0 pts
30%
Yes 30%
No 70%
Leave DCA more than 15 minutes late?
Calm-weather odds: 26% · changed +0 pts in 24h
+0 pts
42%
Yes 42%
No 58%
Arrive at MDW more than an hour late?
Calm-weather odds: 4% · changed −1 pt in 24h
−1 pt
11%
Yes 11%
No 89%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
How late will it get to MDW?
On time or early
68%
15–30 min late
9%
30 min–1 hour late
9%
1–2 hours late
8%
Over 2 hours late
3%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 500 ft, 0.5 in of rain forecast at DCA that day
↑
3pm departures from DCA are often late
↑
WN's recent on-time record
↓
Mostly benign weather forecast at MDW
↓
Sundays in October are usually quieter than average
Weather at each end
DCA (origin)
Gusts 9 kt Ceiling 700 ft Visibility 1 mi Precip 0.46 in
MDW (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.