Historical on-time performance
Atlanta to St. Louis
Flights on ATL–STL arrive on time 81% of the time over the last 12 months.
based on 3,564 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-time81%Medianon timep9030 minCancel2.1%Flights2,380
- Southwest AirlinesOn-time80%Medianon timep9035 minCancel0.8%Flights1,153
- Frontier AirlinesOn-time71%Medianon timep9035 minCancel3.2%Flights31
Why flights run late
Delay causes
- Airline45%
- Weather5%
- Air traffic (NAS)11%
- Late aircraft38%
- Security1%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline69%
- Weather31%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 59 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 → STL
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 — 88% on time.
- Mornings88% on time · p90 15 min · 2,453 flights
- Middays85% on time · p90 20 min · 2,279 flights
- Afternoons82% on time · p90 25 min · 1,971 flights
- Evenings75% on time · p90 40 min · 1,922 flights
- Overnights71% on time · p90 50 min · 1,989 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 86% on time.
- Wednesdays86% on time · p90 20 min · 1,444 flights
- Tuesdays85% on time · p90 25 min · 1,440 flights
- Saturdays82% on time · p90 30 min · 1,229 flights
- Thursdays82% on time · p90 25 min · 1,635 flights
- Fridays80% on time · p90 30 min · 1,633 flights
- Mondays80% on time · p90 35 min · 1,625 flights
- Sundays72% on time · p90 45 min · 1,608 flights
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