Likely delayed: there are delays at WN 391's airports as of 6:51 PM ET. It arrived on time 53.2% of the time in June-August 2026. When it was late, the average delay was 47 minutes. None were cancelled. AUS has major delays (runway construction, max 3 hours and 3 minutes), so this flight is likely to be delayed.
Likely delayed
Leg 2 of 3 (AUS → SAN): Likely delayed: AUS has major delays (runway construction, max 3 hours and 3 minutes). Scheduled to leave at 6:10 PM local time. This flight number flew about 5 days a week in June-August 2026, so it may not operate today.
Cancellation risk: High 0% of its flights were cancelled in June-August 2026; AUS has major delays; rough weather at AUS.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Southwest for official times. Live position: adsb.lol (open data, ODbL).
Book a backup seat DCA → SJCThis flight is cancelled often; a refundable backup costs little
What to do now
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| DCA → STL Washington, DC to St. Louis, MO | 8:00 AM → 9:10 AM | 88% |
| AUS → SAN Austin, TX to San Diego, CA | 6:10 PM → 7:05 PM | 48% |
| SAN → SJC San Diego, CA to San Jose, CA | 6:10 PM → 7:30 PM | 0% |
Local times. Schedules change; check your booking.
How reliable is WN 391?
| Arrived on time (within 15 min) | 53.2% |
| Average delay when late | 47 min |
| Cancelled | 0% |
| Diverted | 0% |
| Flights tracked | 77 |
Best and worst days to fly WN 391
WN 391 was most reliable on Saturdays (78% on time) and least reliable on Thursdays (33%).
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| Tuesday | |
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Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Southwest to the Department of Transportation.
Other flights AUS → SAN
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Southwest app.
Southwest delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is WN 391 delayed today?
AUS has major delays (runway construction, max 3 hours and 3 minutes), so this flight is likely to be delayed. Checked 6:51 PM ET. For this flight's gate and exact status, check the Southwest app.
Is WN 391 usually on time?
WN 391 arrived within 15 minutes of schedule 53.2% of the time in June-August 2026, with an average delay of 47 minutes when late.
How often is WN 391 cancelled?
0% of WN 391 flights were cancelled in June-August 2026.