Historical on-time performance
Chicago to Key West
1,251 miData through Dec 2025Source: US DOT · BTS
Flights on ORD–EYW arrive on time 69% of the time over the last 12 months.
On-time rate69%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled1.8%of scheduled flights
based on 336 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.
- United AirlinesOn-time71%Medianon timep9080 minCancel0.0%Flights100
- Republic AirwaysOn-time64%Medianon timep9050 minCancel1.6%Flights61
- Envoy AirOn-time70%Medianon timep9040 minCancel2.9%Flights175
Why flights run late
Delay causes
- Airline24%
- Weather5%
- Air traffic (NAS)41%
- Late aircraft30%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ORD → EYW
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 73% to 77% on time.
- Middays77% on time · p90 50 min · 607 flights
- Mornings73% on time · p90 45 min · 519 flights
Best day of week
Tuesdays are the most reliable day to fly this route — 87% on time.
- Tuesdays87% on time · p90 30 min · 165 flights · limited
- Wednesdays75% on time · p90 45 min · 162 flights · limited
- Mondays74% on time · p90 40 min · 164 flights · limited
- Sundays73% on time · p90 55 min · 164 flights · limited
- Saturdays72% on time · p90 50 min · 177 flights · limited
- Fridays71% on time · p90 40 min · 160 flights · limited
- Thursdays71% on time · p90 50 min · 158 flights · limited
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