Historical on-time performance
Atlanta to Chicago
Flights on ATL–MDW arrive on time 74% of the time over the last 12 months.
based on 3,535 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.
- Delta Air LinesOn-time78%Medianon timep9035 minCancel2.7%Flights1,406
- Southwest AirlinesOn-time75%Medianon timep9040 minCancel1.4%Flights1,550
- Frontier AirlinesOn-time63%Medianon timep90105 minCancel1.2%Flights579
Why flights run late
Delay causes
- Airline36%
- Weather5%
- Air traffic (NAS)14%
- Late aircraft45%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline45%
- Weather48%
- Air traffic (NAS)6%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 66 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 ATL → 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 — 87% on time.
- Mornings87% on time · p90 15 min · 2,882 flights
- Middays81% on time · p90 30 min · 2,296 flights
- Afternoons76% on time · p90 45 min · 2,063 flights
- Evenings68% on time · p90 60 min · 1,483 flights
- Overnights66% on time · p90 75 min · 2,318 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 82% on time.
- Wednesdays82% on time · p90 30 min · 1,510 flights
- Tuesdays81% on time · p90 35 min · 1,542 flights
- Saturdays78% on time · p90 40 min · 1,290 flights
- Mondays76% on time · p90 50 min · 1,648 flights
- Fridays75% on time · p90 45 min · 1,673 flights
- Thursdays75% on time · p90 50 min · 1,681 flights
- Sundays72% on time · p90 50 min · 1,698 flights
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