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 1139
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Yesterday
WN 1139 · MDW → BZN
departs 11:40 AM CT · arrives 1:50 PM MT
Forecast issued Wed 10:00 PM ET · 9h after departure
Watch this flight
Other days
Wed 9/30
Today 49%
Fri 10/2 16%
Mon 10/5 10%
Tue 10/6 9%
Wed 10/7 12%
Odds over time
Arrive at BZN more than 15 minutes late?
31%
chance · ±0 pts
+6 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
31%
Leave 15+ late
31%
Arrive 1h+ late
10%
Cancelled
3%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at BZN more than 15 minutes late?
Calm-weather odds: 31% · changed +6 pts in 24h
+6 pts
31%
Yes 31%
No 69%
Leave MDW more than 15 minutes late?
Calm-weather odds: 31% · changed +0 pts in 24h
+0 pts
31%
Yes 31%
No 69%
Arrive at BZN more than an hour late?
Calm-weather odds: 10% · changed +2 pts in 24h
+2 pts
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: 3% · changed +2 pts in 24h
+2 pts
3%
Yes 3%
No 97%
How late will it get to BZN?
On time or early
66%
15–30 min late
14%
30 min–1 hour late
7%
1–2 hours late
7%
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 800 ft, visibility down to 2.5 mi, 0.8 in of rain forecast at MDW that day
↑
WN's recent on-time record
↑
11am departures from MDW are often late
↓
Wednesdays in September are usually quieter than average
↓
BZN usually runs smoothly
Weather at each end
MDW (origin)
Gusts 21 kt Ceiling 700 ft Visibility 2.5 mi Precip 0.94 in
BZN (destination)
Gusts 20 kt Ceiling 7,500 ft 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.