No delays reported for WN 3518 (SNA→SJC, SJC→BOI, SAN→OAK) as of 6:47 PM ET. It arrived on time 54.4% of the time in June-August 2026. When it was late, the average delay was 43 minutes. 0.9% of flights were cancelled. Right now there are no reported delays at SNA, SJC, BOI, SAN, OAK.
May not fly today
Leg 1 of 3 (SNA → SJC): Next leg SNA → SJC, scheduled 10:00 AM local time. No delays at SNA right now. This flight number flew about 3 days a week in June-August 2026, so it may not operate today.
Cancellation risk: Medium 0.9% of its flights were cancelled in June-August 2026; rough weather at OAK.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Southwest for official times.
What to do now
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| SNA → SJC Santa Ana, CA to San Jose, CA | 10:00 AM → 11:20 AM | 100% |
| SJC → BOI San Jose, CA to Boise, ID | 11:55 AM → 2:25 PM | 94% |
| SAN → OAK San Diego, CA to Oakland, CA | 1:20 PM → 2:55 PM | 42% |
Local times. Schedules change; check your booking.
How reliable is WN 3518?
| Arrived on time (within 15 min) | 54.4% |
| Average delay when late | 43 min |
| Cancelled | 0.9% |
| Diverted | 1.9% |
| Flights tracked | 106 |
Best and worst days to fly WN 3518
WN 3518 was most reliable on Tuesdays (100% on time) and least reliable on Sundays (14%).
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
| Friday | |
| Saturday | Too few flights |
| Sunday |
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 SAN → OAK
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 3518 delayed today?
Right now there are no reported delays at SNA, SJC, BOI, SAN, OAK. Checked 6:47 PM ET. For this flight's gate and exact status, check the Southwest app.
Is WN 3518 usually on time?
WN 3518 arrived within 15 minutes of schedule 54.4% of the time in June-August 2026, with an average delay of 43 minutes when late.
How often is WN 3518 cancelled?
0.9% of WN 3518 flights were cancelled in June-August 2026.