Historical on-time performance
Detroit to St. Louis
440 miData through Dec 2025Source: US DOT · BTS
Flights on DTW–STL arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 1,709 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-time80%Medianon timep9040 minCancel0.6%Flights1,199
- Southwest AirlinesOn-time80%Medianon timep9035 minCancel0.6%Flights510
Why flights run late
Delay causes
- Airline45%
- Weather4%
- Air traffic (NAS)14%
- Late aircraft38%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DTW → STL
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 90% on time.
- Mornings90% on time · p90 10 min · 1,478 flights
- Middays87% on time · p90 20 min · 1,289 flights
- Afternoons81% on time · p90 35 min · 1,160 flights
- Overnights77% on time · p90 40 min · 1,275 flights
- Evenings74% on time · p90 55 min · 470 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 86% on time.
- Tuesdays86% on time · p90 25 min · 830 flights
- Saturdays84% on time · p90 20 min · 634 flights
- Wednesdays84% on time · p90 30 min · 829 flights
- Mondays83% on time · p90 30 min · 861 flights
- Thursdays83% on time · p90 25 min · 853 flights
- Fridays82% on time · p90 30 min · 852 flights
- Sundays80% on time · p90 45 min · 813 flights
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