About 1 in 8 DL 788 flights from Detroit arrived 15+ minutes late, diverted or cancelled over the past year (13%); 0.6% were cancelled. The typical flight landed 14 minutes early.
DL 788: DTW → SAT
Scheduled to leave Detroit at 8:25 a.m. local time. Over the past year it arrived on time 87% of the time (327 flights), in line with other DL flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 51 | 84% |
| Tuesday | 51 | 94% |
| Wednesday | 51 | 88% |
| Thursday | 51 | 82% |
| Friday | 48 | 85% |
| Saturday | 27 | 78% |
| Sunday | 48 | 92% |
Why it was late
All flights DTW → SAT · Connecting off DL 788? Check the risk
DL 788: SAT → DTW
Scheduled to leave San Antonio at 11:50 a.m. local time. Over the past year it arrived on time 87% of the time (222 flights), in line with other DL flights on the route at that hour (88%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 37 | 84% |
| Tuesday | 37 | 92% |
| Wednesday | 37 | 84% |
| Thursday | 36 | 89% |
| Friday | 34 | 88% |
| Saturday | 8 | — |
| Sunday | 33 | 91% |
Why it was late
All flights SAT → DTW · Connecting off DL 788? Check the risk
Questions
How often is DL 788 from DTW to SAT late?
Delta Air Lines 788 from Detroit, MI to San Antonio, TX arrived 15 or more minutes late, was diverted or was cancelled on 13% of 327 scheduled flights between September 2025 and August 2026. 0.6% were cancelled.
How often is DL 788 from SAT to DTW late?
Delta Air Lines 788 from San Antonio, TX to Detroit, MI arrived 15 or more minutes late, was diverted or was cancelled on 13% of 222 scheduled flights between September 2025 and August 2026. 0.9% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.