Schedule: the flights that flew on Tuesday, Oct 20, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4435
SCHEDULED · TYPICAL SCHEDULE
Tuesday, October 27 Today
WN 4435 · MDW → SLC
departs 8:56 PM CT · arrives 11:11 PM MT
Forecast issued Tue 1:00 AM ET · 21h before departure
Watch this flight
Other days
Today
Wed 10/28 30%
Thu 10/29 38%
Fri 10/30 35%
Mon 11/2 38%
Odds over time
Arrive at SLC more than 15 minutes late?
30%
chance · ±5 pts
+2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
30%
Leave 15+ late
32%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.9d
2d
Now
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 25% · changed +2 pts in 24h
+2 pts
30%
Yes 30%
No 70%
Leave MDW more than 15 minutes late?
Calm-weather odds: 30% · changed +1 pt in 24h
+1 pt
32%
Yes 32%
No 68%
Arrive at SLC more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SLC?
On time or early
70%
15–30 min late
13%
30 min–1 hour late
11%
1–2 hours late
5%
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
↑
8pm departures from MDW are often late
↑
Later flights pick up delays from earlier in the day
↑
WN's recent on-time record
↓
Mostly benign weather forecast at MDW
↓
Tuesdays in October are usually quieter than average
Weather at each end
MDW (origin)
Gusts 9 kt Ceiling 11,333 ft Visibility 10+ mi Precip none
SLC (destination)
Gusts 14 kt Ceiling none (clear) Visibility 10+ mi Precip 0.01 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.