About 1 in 4 DL 5644 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (28%); 6.0% were cancelled. The typical flight landed 8 minutes early.
DL 5644: BOS → BWI
Scheduled to leave Boston at 5:25 p.m. local time, operated by Republic Airways as YX 5644. Over the past year it arrived on time 72% of the time (331 flights), in line with other DL flights on the route at that hour (72%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from Boston to Baltimore (61% of days). Delta Air Lines's last BOS–BWI flight was cancelled 6.3% of the time, against 3.4% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 6:35 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 57% |
| Tuesday | 48 | 71% |
| Wednesday | 48 | 79% |
| Thursday | 47 | 87% |
| Friday | 48 | 71% |
| Saturday | 44 | 77% |
| Sunday | 47 | 60% |
Why it was late
All flights BOS → BWI · Connecting off DL 5644? Check the risk
DL 5644: BWI → BOS
Scheduled to leave Baltimore at 7:59 p.m. local time, operated by Republic Airways as YX 5644. Over the past year it arrived on time 61% of the time (304 flights), worse than other DL flights on the route at that hour (77%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from Baltimore to Boston (100% of days). Delta Air Lines's last BWI–BOS flight was cancelled 6.6% of the time, against 3.0% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 6:21 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 50 | 60% |
| Tuesday | 50 | 64% |
| Wednesday | 50 | 54% |
| Thursday | 49 | 69% |
| Friday | 49 | 69% |
| Saturday | 10 | — |
| Sunday | 46 | 46% |
Why it was late
All flights BWI → BOS · Connecting off DL 5644? Check the risk
Questions
How often is DL 5644 from BOS to BWI late?
Delta Air Lines 5644 from Boston, MA to Baltimore, MD arrived 15 or more minutes late, was diverted or was cancelled on 28% of 331 scheduled flights between September 2025 and August 2026. 6.0% were cancelled.
How often is DL 5644 from BWI to BOS late?
Delta Air Lines 5644 from Baltimore, MD to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 39% of 304 scheduled flights between September 2025 and August 2026. 6.6% 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.