Flight OddsWN121 PHX → BOI
Southwest Airlines · Phoenix, AZ to Boise, ID · 59 flights observed, 2025-11-02 to 2026-01-05 · 735 mi
WN121 covers more than one route in the data window — the stats below are for PHX → BOI, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
66%
Median delay
+3 min
90th percentile
+45 min
Cancellation rate
0%
How often is WN121 on time?
Across 59 flights on PHX → BOI from 2025-11-02 to 2026-01-05, WN121 arrived within 15 minutes of schedule 66% of the time. The median arrival delay was +3 min, and the worst 10% of flights arrived +45 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 | 39 | 66% |
| 16-30 min | 10 | 17% |
| 31-60 min | 8 | 14% |
| 61-120 min | 2 | 3% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 25 | 72% | +4 min |
| 2025-12 | 29 | 62% | +14 min |
| 2026-01 | 5 | 60% | +12 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 10 | 70% |
| Tue | 9 | 78% |
| Wed | 9 | 67% |
| Thu | 8 | 88% |
| Fri | 9 | 33% |
| Sat | 5 | 80% |
| Sun | 9 | 56% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…