Historical on-time performance
St. Louis to Detroit
440 miData through May 2026Source: US DOT · BTS
Flights on STL–DTW arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 1,759 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time88%Medianon timep9020 minCancel1.4%Flights1,082
- Southwest AirlinesOn-time75%Medianon timep9055 minCancel0.4%Flights557
- SkyWest AirlinesOn-time73%Medianon timep90110 minCancel0.8%Flights120
Why flights run late
Delay causes
- Airline43%
- Weather6%
- Air traffic (NAS)7%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline61%
- Weather17%
- Air traffic (NAS)22%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 18 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 STL → DTW
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 — 91% on time.
- Mornings91% on time · p90 5 min · 1,728 flights
- Middays87% on time · p90 20 min · 1,384 flights
- Afternoons84% on time · p90 25 min · 734 flights
- Evenings77% on time · p90 50 min · 1,602 flights
- Overnights59% on time · p90 120 min · 147 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 87% on time.
- Saturdays87% on time · p90 20 min · 646 flights
- Tuesdays87% on time · p90 25 min · 806 flights
- Wednesdays86% on time · p90 25 min · 808 flights
- Thursdays85% on time · p90 20 min · 840 flights
- Fridays82% on time · p90 25 min · 839 flights
- Sundays82% on time · p90 35 min · 816 flights
- Mondays81% on time · p90 45 min · 840 flights
Keep exploring