About 1 in 4 DL 5645 flights from Washington arrived 15+ minutes late, diverted or cancelled over the past year (25%); 1.6% were cancelled. The typical flight landed 6 minutes early.
DL 5645: DCA → MSN
Scheduled to leave Washington at 3:40 p.m. local time, operated by Republic Airways as YX 5645. Over the past year it arrived on time 75% of the time (304 flights), in line with other DL flights on the route at that hour (75%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 52 | 83% |
| Tuesday | 51 | 80% |
| Wednesday | 50 | 72% |
| Thursday | 49 | 69% |
| Friday | 49 | 71% |
| Saturday | 2 | — |
| Sunday | 51 | 75% |
Why it was late
All flights DCA → MSN · Connecting off DL 5645? Check the risk
DL 5645: MSN → DCA
Scheduled to leave Madison at 5:20 p.m. local time, operated by Republic Airways as YX 5645. Over the past year it arrived on time 69% of the time (304 flights), in line with other DL flights on the route at that hour (69%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 52 | 77% |
| Tuesday | 51 | 69% |
| Wednesday | 50 | 66% |
| Thursday | 49 | 69% |
| Friday | 49 | 63% |
| Saturday | 2 | — |
| Sunday | 51 | 73% |
Why it was late
All flights MSN → DCA · Connecting off DL 5645? Check the risk
Questions
How often is DL 5645 from DCA to MSN late?
Delta Air Lines 5645 from Washington, DC to Madison, WI arrived 15 or more minutes late, was diverted or was cancelled on 25% of 304 scheduled flights between September 2025 and August 2026. 1.6% were cancelled.
How often is DL 5645 from MSN to DCA late?
Delta Air Lines 5645 from Madison, WI to Washington, DC arrived 15 or more minutes late, was diverted or was cancelled on 31% of 304 scheduled flights between September 2025 and August 2026. 2.6% 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.