Historical on-time performance
Chicago to Miami
Flights on ORD–MIA arrive on time 73% of the time over the last 12 months.
based on 4,365 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-time75%Medianon timep9050 minCancel1.8%Flights3,019
- United AirlinesOn-time73%Medianon timep9045 minCancel0.6%Flights1,011
- Spirit AirlinesOn-time56%Medianon timep9075 minCancel6.3%Flights335
Why flights run late
Delay causes
- Airline30%
- Weather6%
- Air traffic (NAS)28%
- Late aircraft37%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline6%
- Weather81%
- Air traffic (NAS)12%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 81 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 → MIA
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 — 84% on time.
- Mornings84% on time · p90 25 min · 5,085 flights
- Middays74% on time · p90 50 min · 3,560 flights
- Evenings66% on time · p90 70 min · 2,351 flights
- Afternoons65% on time · p90 70 min · 2,099 flights
- Overnights57% on time · p90 80 min · 207 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 79% on time.
- Tuesdays79% on time · p90 35 min · 1,818 flights
- Wednesdays78% on time · p90 40 min · 1,816 flights
- Mondays76% on time · p90 45 min · 1,922 flights
- Thursdays75% on time · p90 40 min · 1,919 flights
- Fridays74% on time · p90 50 min · 1,946 flights
- Saturdays74% on time · p90 50 min · 1,932 flights
- Sundays70% on time · p90 65 min · 1,952 flights
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