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 4070
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Tomorrow
WN 4070 · MDW → BWI
departs 8:50 AM CT · arrives 11:40 AM ET
Forecast issued Sat 3:00 PM ET · 19h before departure
Watch this flight
Odds over time
Arrive at BWI more than 15 minutes late?
12%
chance · ±0 pts
+3 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
12%
Leave 15+ late
10%
Arrive 1h+ late
2%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
5.5d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at BWI more than 15 minutes late?
Calm-weather odds: 8% · changed +3 pts in 24h
+3 pts
12%
Yes 12%
No 88%
Leave MDW more than 15 minutes late?
Calm-weather odds: 8% · changed +2 pts in 24h
+2 pts
10%
Yes 10%
No 90%
Arrive at BWI more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
1%
Yes 1%
No 99%
How late will it get to BWI?
On time or early
87%
15–30 min late
8%
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
↑
Cloud base down to 200 ft, visibility down to 0.5 mi forecast at BWI that day
↑
Other factors
↓
Mostly benign weather forecast at MDW
↓
Arrivals into BWI at that hour are usually not late
Weather at each end
MDW (origin)
Gusts 11 kt Ceiling none (clear) Visibility 10+ mi Precip none
BWI (destination)
Gusts 11 kt Ceiling 200 ft Visibility 0.5 mi Precip 0.13 in
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.