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 1277
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Tomorrow
WN 1277 · SAN → LAS
departs 7:05 AM PT · arrives 8:35 AM PT
Forecast issued Sat 4:00 PM ET · 18h before departure
Watch this flight
Odds over time
Arrive at LAS more than 15 minutes late?
10%
chance · ±3 pts
+3 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
10%
Leave 15+ late
7%
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 LAS more than 15 minutes late?
Calm-weather odds: 9% · changed +3 pts in 24h
+3 pts
10%
Yes 10%
No 90%
Leave SAN more than 15 minutes late?
Calm-weather odds: 7% · changed +1 pt in 24h
+1 pt
7%
Yes 7%
No 93%
Arrive at LAS 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 LAS?
On time or early
89%
15–30 min late
6%
30 min–1 hour late
2%
1–2 hours late
1%
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
↑
SAN is prone to delays
↑
LAS is prone to delays
↑
This flight has been late 18% of the time recently
↓
Early flights usually leave on time
↓
Mostly benign weather forecast at LAS
Weather at each end
SAN (origin)
Gusts 14 kt
Ceiling none (clear)
Visibility 10+ mi
Precip none
LAS (destination)
Gusts 13 kt
Ceiling none (clear)
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.