Schedule: the flights that flew on Saturday, Oct 24, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 1551
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 31
WN 1551 · DEN → BOI
departs 2:09 PM MT · arrives 4:07 PM MT
Forecast issued Thu 2:00 AM ET · 62h before departure
Watch this flight
Other days
Today 19%
Fri 10/30 19%
Sat 10/31
Sun 11/1 35%
Mon 11/2 27%
Odds over time
Arrive at BOI more than 15 minutes late?
18%
chance · ±3 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
18%
Leave 15+ late
25%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.7d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at BOI more than 15 minutes late?
Calm-weather odds: 17% · changed – in 24h
–
18%
Yes 18%
No 82%
Leave DEN more than 15 minutes late?
Calm-weather odds: 24% · changed – in 24h
–
25%
Yes 25%
No 75%
Arrive at BOI more than an hour late?
Calm-weather odds: 3% · changed – in 24h
–
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to BOI?
On time or early
82%
15–30 min late
11%
30 min–1 hour late
3%
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
↑
2pm departures from DEN are often late
↑
This flight has been late 49% of the time recently
↑
Later flights pick up delays from earlier in the day
↓
Mostly benign weather forecast at DEN
↓
WN's recent on-time record
Weather at each end
DEN (origin)
Gusts 11 kt Ceiling none (clear) Visibility 10+ mi Precip none
BOI (destination)
Gusts 10 kt Ceiling 2,300 ft Visibility 6.66667 mi Precip 0.09 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.