Historical on-time performance
Detroit to San Antonio
1,214 miData through Dec 2025Source: US DOT · BTS
Flights on DTW–SAT 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)
Cancelled0.4%of scheduled flights
based on 932 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time80%Medianon timep9040 minCancel0.4%Flights932
Why flights run late
Delay causes
- Airline55%
- Weather3%
- Air traffic (NAS)23%
- Late aircraft19%
- 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 → SAT
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 74% to 85% on time.
- Evenings85% on time · p90 20 min · 93 flights · limited
- Mornings85% on time · p90 25 min · 1,043 flights
- Middays82% on time · p90 40 min · 631 flights
- Afternoons81% on time · p90 30 min · 151 flights · limited
- Overnights74% on time · p90 50 min · 857 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 85% on time.
- Tuesdays85% on time · p90 30 min · 400 flights
- Wednesdays83% on time · p90 30 min · 399 flights
- Thursdays81% on time · p90 30 min · 406 flights
- Saturdays80% on time · p90 35 min · 322 flights
- Mondays80% on time · p90 40 min · 426 flights
- Fridays79% on time · p90 40 min · 417 flights
- Sundays77% on time · p90 45 min · 405 flights
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