Historical on-time performance
San Antonio to Detroit
1,214 miData through May 2026Source: US DOT · BTS
Flights on SAT–DTW arrive on time 89% of the time over the last 12 months.
On-time rate89%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 935 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time89%Medianon timep9015 minCancel0.7%Flights935
Why flights run late
Delay causes
- Airline47%
- Weather10%
- Air traffic (NAS)12%
- Late aircraft31%
- Security1%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline71%
- Weather29%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 7 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 SAT → 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 — 93% on time.
- Mornings93% on time · p90 5 min · 1,107 flights
- Middays86% on time · p90 20 min · 645 flights
- Afternoons83% on time · p90 30 min · 1,049 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 85% to 90% on time.
- Saturdays90% on time · p90 10 min · 325 flights
- Wednesdays89% on time · p90 15 min · 401 flights
- Tuesdays88% on time · p90 20 min · 401 flights
- Thursdays88% on time · p90 15 min · 412 flights
- Fridays88% on time · p90 15 min · 424 flights
- Mondays86% on time · p90 25 min · 427 flights
- Sundays85% on time · p90 25 min · 412 flights
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