Historical on-time performance
San Diego to Detroit
1,956 miData through Dec 2025Source: US DOT · BTS
Flights on SAN–DTW arrive on time 85% of the time over the last 12 months.
On-time rate85%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 1,225 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time85%Medianon timep9020 minCancel0.7%Flights1,225
Why flights run late
Delay causes
- Airline32%
- Weather6%
- Air traffic (NAS)28%
- Late aircraft34%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SAN → DTW
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 79% to 89% on time.
- Overnights89% on time · p90 15 min · 879 flights
- Mornings88% on time · p90 15 min · 1,096 flights
- Afternoons84% on time · p90 25 min · 530 flights
- Middays79% on time · p90 30 min · 1,161 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 87% on time.
- Tuesdays87% on time · p90 20 min · 467 flights
- Wednesdays86% on time · p90 20 min · 491 flights
- Saturdays86% on time · p90 20 min · 460 flights
- Mondays85% on time · p90 20 min · 566 flights
- Fridays84% on time · p90 20 min · 565 flights
- Thursdays84% on time · p90 20 min · 555 flights
- Sundays80% on time · p90 30 min · 562 flights
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