Flight OddsWN3878 LAS → SEA
Southwest Airlines · Las Vegas, NV to Seattle, WA · 18 flights observed, 2025-11-22 to 2026-01-04 · 867 mi
WN3878 covers more than one route in the data window — the stats below are for LAS → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
44%
Median delay
+20 min
90th percentile
+94 min
Cancellation rate
0%
How often is WN3878 on time?
Across 18 flights on LAS → SEA from 2025-11-22 to 2026-01-04, WN3878 arrived within 15 minutes of schedule 44% of the time. The median arrival delay was +20 min, and the worst 10% of flights arrived +94 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 8 | 44% |
| 16-30 min | 4 | 22% |
| 31-60 min | 2 | 11% |
| 61-120 min | 4 | 22% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 4 | 75% | +15 min |
| 2025-12 | 11 | 36% | +27 min |
| 2026-01 | 3 | 33% | +41 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 33% |
| Tue | 3 | 67% |
| Wed | 1 | 100% |
| Thu | No data | — |
| Fri | 3 | 33% |
| Sat | 5 | 20% |
| Sun | 3 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…