About 1 in 4 DL 303 flights from Dallas arrived 15+ minutes late, diverted or cancelled over the past year (27%); 3.2% were cancelled. The typical flight landed 8 minutes early.
DL 303: DFW → BOS
Scheduled to leave Dallas at 6:55 p.m. local time. Over the past year it arrived on time 73% of the time (251 flights), in line with other DL flights on the route at that hour (74%). Last seen in the data Jul 6, 2026.
Usually Delta Air Lines's last flight of the day from Dallas to Boston (98% of days). Delta Air Lines's last DFW–BOS flight was cancelled 2.7% of the time, against 2.2% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 7:05 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 43 | 74% |
| Tuesday | 41 | 68% |
| Wednesday | 39 | 72% |
| Thursday | 39 | 82% |
| Friday | 41 | 88% |
| Saturday | 9 | — |
| Sunday | 39 | 59% |
Why it was late
All flights DFW → BOS · Connecting off DL 303? Check the risk
DL 303: BOS → DFW
Scheduled to leave Boston at 12:05 p.m. local time. Over the past year it arrived on time 70% of the time (185 flights), worse than other DL flights on the route at that hour (79%). Last seen in the data Aug 30, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 29 | 79% |
| Tuesday | 29 | 66% |
| Wednesday | 29 | 62% |
| Thursday | 29 | 76% |
| Friday | 29 | 76% |
| Saturday | 12 | — |
| Sunday | 28 | 68% |
Why it was late
All flights BOS → DFW · Connecting off DL 303? Check the risk
Questions
How often is DL 303 from DFW to BOS late?
Delta Air Lines 303 from Dallas/Fort Worth, TX to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 27% of 251 scheduled flights between September 2025 and August 2026. 3.2% were cancelled.
How often is DL 303 from BOS to DFW late?
Delta Air Lines 303 from Boston, MA to Dallas/Fort Worth, TX arrived 15 or more minutes late, was diverted or was cancelled on 30% of 185 scheduled flights between September 2025 and August 2026. 1.1% 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.