Historical on-time performance
Chicago to Miami
1,182 miData through May 2026Source: US DOT · BTS
Flights on MDW–MIA arrive on time 71% of the time over the last 12 months.
On-time rate71%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 380 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time71%Medianon timep9040 minCancel1.3%Flights380
Why flights run late
Delay causes
- Airline36%
- Weather0%
- Air traffic (NAS)25%
- Late aircraft38%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather80%
- Air traffic (NAS)20%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 5 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 MDW → MIA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 55% to 79% on time.
- Mornings79% on time · p90 30 min · 958 flights
- Middays77% on time · p90 55 min · 240 flights
- Evenings68% on time · p90 75 min · 628 flights
- Overnights61% on time · p90 70 min · 228 flights
- Afternoons55% on time · p90 85 min · 208 flights
Best day of week
Tuesdays are the most reliable day to fly this route — 83% on time.
- Tuesdays83% on time · p90 40 min · 243 flights
- Mondays75% on time · p90 60 min · 340 flights
- Wednesdays73% on time · p90 65 min · 248 flights
- Fridays71% on time · p90 60 min · 336 flights
- Saturdays71% on time · p90 50 min · 421 flights
- Thursdays67% on time · p90 55 min · 326 flights
- Sundays67% on time · p90 50 min · 348 flights
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