Historical on-time performance
Phoenix to St. Louis
Flights on PHX–STL arrive on time 78% of the time over the last 12 months.
based on 2,079 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- American AirlinesOn-time80%Medianon timep9035 minCancel0.6%Flights478
- Southwest AirlinesOn-time77%Medianon timep9035 minCancel0.2%Flights1,601
Why flights run late
Delay causes
- Airline40%
- Weather1%
- Air traffic (NAS)9%
- Late aircraft49%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline17%
- Weather83%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 6 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly PHX → STL
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 91% on time.
- Mornings91% on time · p90 10 min · 2,270 flights
- Middays81% on time · p90 25 min · 1,449 flights
- Evenings74% on time · p90 45 min · 1,786 flights
- Afternoons69% on time · p90 50 min · 836 flights
- Overnights58% on time · p90 75 min · 466 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 84% on time.
- Wednesdays84% on time · p90 25 min · 955 flights
- Tuesdays82% on time · p90 25 min · 938 flights
- Saturdays81% on time · p90 30 min · 817 flights
- Fridays79% on time · p90 35 min · 1,041 flights
- Thursdays78% on time · p90 40 min · 1,001 flights
- Mondays77% on time · p90 35 min · 1,035 flights
- Sundays76% on time · p90 35 min · 1,025 flights
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