Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 391SCHEDULED · TYPICAL ODDS
WN 391 · AUS → SAN
departs 6:10 PM CT · arrives 7:05 PM PT
Forecast issued Thu 12:00 PM ET · 103h before departure
Typical odds
Too early for a weather forecast — these are typical odds for this flight on a Monday in October, from the weather this date has had in past years (the range shows how much they varied). They’ll switch to forecast-based odds about 3 days before departure.
Odds over time
Arrive at SAN more than 15 minutes late?
28%chance · ±8 pts+0 pts · 24h
HOW SURE WE ARELow. This is mostly a starting point from history; weather forecasts haven't kicked in yet.
How late will it get to SAN?
On time or early
72%
15–30 min late
6%
30 min–1 hour late
14%
1–2 hours late
5%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.