Historical on-time performance
Fort Lauderdale to Chicago
1,166 miData through May 2026Source: US DOT · BTS
Flights on FLL–MDW arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights
based on 1,133 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time70%Medianon timep9050 minCancel1.4%Flights1,133
Why flights run late
Delay causes
- Airline34%
- Weather3%
- Air traffic (NAS)17%
- Late aircraft46%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline13%
- Weather56%
- Air traffic (NAS)31%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 16 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 FLL → MDW
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 10 min · 1,105 flights
- Middays74% on time · p90 40 min · 886 flights
- Afternoons63% on time · p90 65 min · 416 flights
- Overnights59% on time · p90 75 min · 242 flights
- Evenings57% on time · p90 65 min · 817 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 80% on time.
- Wednesdays80% on time · p90 30 min · 446 flights
- Tuesdays76% on time · p90 45 min · 449 flights
- Saturdays74% on time · p90 45 min · 614 flights
- Thursdays74% on time · p90 45 min · 473 flights
- Fridays69% on time · p90 50 min · 476 flights
- Mondays69% on time · p90 50 min · 473 flights
- Sundays66% on time · p90 65 min · 535 flights
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