About 1 in 9 DL 3990 flights from Grand Rapids arrived 15+ minutes late, diverted or cancelled over the past year (12%); 1.5% were cancelled. The typical flight landed 13 minutes early.
DL 3990: GRR → MSP
Scheduled to leave Grand Rapids at 11:30 a.m. local time, operated by SkyWest as OO 3990. Over the past year it arrived on time 88% of the time (138 flights), better than other DL flights on the route at that hour (84%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 20 | 90% |
| Tuesday | 19 | — |
| Wednesday | 19 | — |
| Thursday | 20 | 90% |
| Friday | 20 | 90% |
| Saturday | 20 | 85% |
| Sunday | 20 | 80% |
Why it was late
All flights GRR → MSP · Connecting off DL 3990? Check the risk
DL 3990: MSP → GRR
Scheduled to leave Minneapolis at 9:00 a.m. local time, operated by SkyWest as OO 3990. Over the past year it arrived on time 88% of the time (138 flights), better than other DL flights on the route at that hour (84%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 20 | 90% |
| Tuesday | 19 | — |
| Wednesday | 19 | — |
| Thursday | 20 | 90% |
| Friday | 20 | 85% |
| Saturday | 20 | 85% |
| Sunday | 20 | 85% |
Why it was late
All flights MSP → GRR · Connecting off DL 3990? Check the risk
Questions
How often is DL 3990 from GRR to MSP late?
Delta Air Lines 3990 from Grand Rapids, MI to Minneapolis, MN arrived 15 or more minutes late, was diverted or was cancelled on 12% of 138 scheduled flights between September 2025 and August 2026. 1.5% were cancelled.
How often is DL 3990 from MSP to GRR late?
Delta Air Lines 3990 from Minneapolis, MN to Grand Rapids, MI arrived 15 or more minutes late, was diverted or was cancelled on 12% of 138 scheduled flights between September 2025 and August 2026. 1.5% 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.