Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4536
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Tomorrow
WN 4536 · IND → BWI
departs 4:10 PM ET · arrives 5:50 PM ET
Forecast issued Tue 5:00 PM ET · 23h before departure
Watch this flight
Other days
Today 19%
Wed 9/30
Thu 10/1 19%
Fri 10/2 20%
Mon 10/5 17%
Odds over time
Arrive at BWI more than 15 minutes late?
16%
chance · ±0 pts
−2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
22%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
Now
12h
6h
Departs
Lands
Arrive at BWI more than 15 minutes late?
Calm-weather odds: 13% · changed −2 pts in 24h
−2 pts
16%
Yes 16%
No 84%
Leave IND more than 15 minutes late?
Calm-weather odds: 20% · changed +2 pts in 24h
+2 pts
22%
Yes 22%
No 78%
Arrive at BWI more than an hour late?
Calm-weather odds: 3% · 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 BWI?
On time or early
84%
15–30 min late
7%
30 min–1 hour late
5%
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
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into BWI at that hour are often late
↑
WN's recent on-time record
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at BWI
Weather at each end
IND (origin)
Gusts 13 kt Ceiling none (clear) Visibility 10+ mi Precip none
BWI (destination)
Gusts 10 kt Ceiling none (clear) Visibility 5 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.