Southwest Airlines PHX to STL on-time performance
Southwest Airlines nonstop flights from Phoenix to St. Louis · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
0.2%
3 flights
Avg arrival delay
13 min
47 min when late
Rank on route
#5 of 5
route average 77% on time
Key facts
- Southwest Airlines flights on PHX to STL arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 0.2% were cancelled, and 6% arrived an hour or more late.
- That ranks #5 of 5 airlines on this route, which averaged 77% on time overall.
- The largest source of delay minutes was late-arriving aircraft (53%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft53%
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion8%
- Security1%
- Extreme weather1%
Other airlines on PHX to STL
- American Airlines78% on time · 16 min avg delay
- Frontier Airlines83% on time · 30 min avg delay
- Envoy Air93% on time · 6 min avg delay
- SkyWest Airlines89% on time · 5 min avg delay
Full PHX to STL comparison →
Southwest Airlines on-time record across all routes →
1,620 Southwest Airlines flights tracked on this route; 3 cancelled, 10 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.