About 1 in 5 DL 4173 flights from Detroit arrived 15+ minutes late, diverted or cancelled over the past year (22%); 1.4% were cancelled. The typical flight landed 12 minutes early.
DL 4173: DTW → MBS
Scheduled to leave Detroit at 9:35 p.m. local time, operated by SkyWest as OO 4173. Over the past year it arrived on time 78% of the time (290 flights), better than other DL flights on the route at that hour (74%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from Detroit to Saginaw (100% of days). Delta Air Lines's last DTW–MBS flight was cancelled 1.4% of the time, against 1.1% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 10:10 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 42 | 79% |
| Tuesday | 41 | 73% |
| Wednesday | 41 | 78% |
| Thursday | 41 | 88% |
| Friday | 42 | 76% |
| Saturday | 42 | 79% |
| Sunday | 41 | 73% |
Why it was late
All flights DTW → MBS · Connecting off DL 4173? Check the risk
Questions
How often is DL 4173 from DTW to MBS late?
Delta Air Lines 4173 from Detroit, MI to Saginaw/Bay City/Midland, MI arrived 15 or more minutes late, was diverted or was cancelled on 22% of 290 scheduled flights between September 2025 and August 2026. 1.4% 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.