Historical on-time performance
Chicago to Atlanta
590 miData through May 2026Source: US DOT · BTS
Flights on MDW–ATL arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled2.0%of scheduled flights
based on 3,538 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time83%Medianon timep9030 minCancel3.0%Flights1,406
- Southwest AirlinesOn-time77%Medianon timep9040 minCancel1.2%Flights1,553
- Frontier AirlinesOn-time69%Medianon timep9050 minCancel1.4%Flights579
Why flights run late
Delay causes
- Airline41%
- Weather3%
- Air traffic (NAS)21%
- Late aircraft34%
- Security1%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline46%
- Weather51%
- Air traffic (NAS)3%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 69 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 → ATL
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 — 85% on time.
- Mornings85% on time · p90 20 min · 3,614 flights
- Middays83% on time · p90 30 min · 3,053 flights
- Afternoons75% on time · p90 45 min · 1,660 flights
- Evenings73% on time · p90 55 min · 2,157 flights
- Overnights62% on time · p90 75 min · 525 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 82% on time.
- Wednesdays82% on time · p90 30 min · 1,506 flights
- Tuesdays82% on time · p90 35 min · 1,537 flights
- Thursdays81% on time · p90 35 min · 1,672 flights
- Saturdays80% on time · p90 30 min · 1,294 flights
- Mondays79% on time · p90 35 min · 1,646 flights
- Fridays78% on time · p90 35 min · 1,662 flights
- Sundays75% on time · p90 45 min · 1,692 flights
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