Historical on-time performance
Chicago to Phoenix
1,440 miData through May 2026Source: US DOT · BTS
Flights on ORD–PHX arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled1.6%of scheduled flights
based on 5,402 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time79%Medianon timep9040 minCancel0.4%Flights1,944
- Frontier AirlinesOn-time72%Medianon timep9060 minCancel5.1%Flights39
- American AirlinesOn-time71%Medianon timep9055 minCancel2.2%Flights2,992
- Southwest AirlinesOn-time55%Median5 minp9065 minCancel1.9%Flights427
Why flights run late
Delay causes
- Airline34%
- Weather4%
- Air traffic (NAS)15%
- Late aircraft46%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline5%
- Weather81%
- Air traffic (NAS)14%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 84 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 ORD → 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 — 86% on time.
- Mornings86% on time · p90 20 min · 5,727 flights
- Middays80% on time · p90 40 min · 4,493 flights
- Afternoons72% on time · p90 60 min · 2,529 flights
- Evenings71% on time · p90 65 min · 2,628 flights
- Overnights64% on time · p90 70 min · 2,089 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 80% on time.
- Tuesdays80% on time · p90 40 min · 2,399 flights
- Saturdays80% on time · p90 35 min · 2,464 flights
- Wednesdays80% on time · p90 40 min · 2,388 flights
- Thursdays77% on time · p90 45 min · 2,534 flights
- Mondays76% on time · p90 45 min · 2,558 flights
- Fridays75% on time · p90 50 min · 2,570 flights
- Sundays74% on time · p90 45 min · 2,555 flights
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