About 1 in 2 DL 5221 flights from Cincinnati arrived 15+ minutes late, diverted or cancelled over the past year (41%); 0.9% were cancelled. The typical flight landed 7 minutes late.
DL 5221: CVG → DCA
Scheduled to leave Cincinnati at 12:25 p.m. local time, operated by Endeavor Air as 9E 5221. Over the past year it arrived on time 59% of the time (340 flights), in line with other DL flights on the route at that hour (57%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 50 | 62% |
| Tuesday | 50 | 58% |
| Wednesday | 49 | 57% |
| Thursday | 48 | 50% |
| Friday | 47 | 55% |
| Saturday | 48 | 71% |
| Sunday | 48 | 60% |
Why it was late
All flights CVG → DCA · Connecting off DL 5221? Check the risk
DL 5221: DCA → CVG
Scheduled to leave Washington at 2:45 p.m. local time, operated by Endeavor Air as 9E 5221. Over the past year it arrived on time 64% of the time (293 flights), better than other DL flights on the route at that hour (61%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 46 | 70% |
| Tuesday | 45 | 64% |
| Wednesday | 45 | 58% |
| Thursday | 44 | 55% |
| Friday | 43 | 70% |
| Saturday | 27 | 85% |
| Sunday | 43 | 56% |
Why it was late
All flights DCA → CVG · Connecting off DL 5221? Check the risk
Questions
How often is DL 5221 from CVG to DCA late?
Delta Air Lines 5221 from Cincinnati, OH to Washington, DC arrived 15 or more minutes late, was diverted or was cancelled on 41% of 340 scheduled flights between September 2025 and August 2026. 0.9% were cancelled.
How often is DL 5221 from DCA to CVG late?
Delta Air Lines 5221 from Washington, DC to Cincinnati, OH arrived 15 or more minutes late, was diverted or was cancelled on 36% of 293 scheduled flights between September 2025 and August 2026. 2.4% 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.