Southwest Airlines BOI to PHX on-time performance
Southwest Airlines nonstop flights from Boise to Phoenix · Aug 2025 – Jul 2026
On-time arrivals
82%
arrived < 15 min late
Cancelled
0.5%
4 flights
Avg arrival delay
11 min
60 min when late
Rank on route
#2 of 5
route average 84% on time
Key facts
- Southwest Airlines flights on BOI to PHX arrived on time 82% of the time in Aug 2025 – Jul 2026.
- 0.5% were cancelled, and 4% arrived an hour or more late.
- That ranks #2 of 5 airlines on this route, which averaged 84% on time overall.
- The largest source of delay minutes was late-arriving aircraft (59%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft59%
- Airline (crew, maintenance, cleaning, fueling)26%
- Air traffic control & airport congestion14%
- Extreme weather0%
- Security0%
Other airlines on BOI to PHX
- SkyWest Airlines86% on time · 14 min avg delay
- Envoy Air76% on time · 12 min avg delay
- American Airlines73% on time · 27 min avg delay
- Alaska Airlines60% on time · 8 min avg delay
Full BOI to PHX comparison →
Southwest Airlines on-time record across all routes →
813 Southwest Airlines flights tracked on this route; 4 cancelled, 3 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.