WN3858 PHX → BOI

Southwest Airlines · Phoenix, AZ to Boise, ID · 15 flights observed, 2026-03-05 to 2026-04-06 · 735 mi

This flight's reliability varies a lot by day of week — 80% on-time on Thursdays vs. 40% on Mondays.

WN3858 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
60%
Median delay
-7 min
90th percentile
+60 min
Cancellation rate
0%

How often is WN3858 on time?

Across 15 flights on PHX → BOI from 2026-03-05 to 2026-04-06, WN3858 arrived within 15 minutes of schedule 60% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +60 min or later. 0% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time960%
16-30 min00%
31-60 min427%
61-120 min213%
2+ hrs00%

Performance by month

MonthFlightsOn-timeAvg delay
2026-031258%+16 min
2026-04367%+8 min

Performance by day of week

DayFlightsOn-time
Mon540%
TueNo data—
WedNo data—
Thu580%
Fri560%
SatNo data—
SunNo data—

Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…