Historical on-time performance
St. Louis to Phoenix
1,262 miData through May 2026Source: US DOT · BTS
Flights on STL–PHX arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 2,080 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- American AirlinesbestOn-time82%Medianon timep9055 minCancel0.8%Flights479
- Southwest AirlinesOn-time73%Medianon timep9045 minCancel0.3%Flights1,601
Why flights run late
Delay causes
- Airline41%
- Weather4%
- Air traffic (NAS)11%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline11%
- Weather78%
- Air traffic (NAS)11%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 9 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 STL → PHX
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 — 89% on time.
- Mornings89% on time · p90 15 min · 2,540 flights
- Middays82% on time · p90 20 min · 838 flights
- Afternoons76% on time · p90 40 min · 1,254 flights
- Evenings67% on time · p90 50 min · 1,274 flights
- Overnights61% on time · p90 65 min · 829 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 81% on time.
- Wednesdays81% on time · p90 35 min · 944 flights
- Tuesdays80% on time · p90 30 min · 935 flights
- Fridays78% on time · p90 35 min · 1,022 flights
- Saturdays78% on time · p90 35 min · 818 flights
- Mondays77% on time · p90 40 min · 1,022 flights
- Thursdays76% on time · p90 35 min · 974 flights
- Sundays75% on time · p90 40 min · 1,020 flights
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