About 1 in 3 DL 5731 flights from Pittsburgh arrived 15+ minutes late, diverted or cancelled over the past year (36%); 5.0% were cancelled. The typical flight landed 9 minutes early.
DL 5731: PIT → BOS
Scheduled to leave Pittsburgh at 2:25 p.m. local time, operated by Republic Airways as YX 5731. Over the past year it arrived on time 64% of the time (180 flights), in line with other DL flights on the route at that hour (66%). Last seen in the data Aug 30, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 27 | 56% |
| Tuesday | 26 | 62% |
| Wednesday | 26 | 65% |
| Thursday | 26 | 58% |
| Friday | 25 | 72% |
| Saturday | 30 | 73% |
| Sunday | 20 | 65% |
Why it was late
All flights PIT → BOS · Connecting off DL 5731? Check the risk
DL 5731: BOS → PIT
Scheduled to leave Boston at 11:45 a.m. local time, operated by Republic Airways as YX 5731. Over the past year it arrived on time 86% of the time (167 flights), in line with other DL flights on the route at that hour (86%). Last seen in the data Aug 30, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 28 | 82% |
| Tuesday | 28 | 86% |
| Wednesday | 28 | 96% |
| Thursday | 28 | 75% |
| Friday | 25 | 92% |
| Saturday | 10 | — |
| Sunday | 20 | 80% |
Why it was late
All flights BOS → PIT · Connecting off DL 5731? Check the risk
Questions
How often is DL 5731 from PIT to BOS late?
Delta Air Lines 5731 from Pittsburgh, PA to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 36% of 180 scheduled flights between September 2025 and August 2026. 5.0% were cancelled.
How often is DL 5731 from BOS to PIT late?
Delta Air Lines 5731 from Boston, MA to Pittsburgh, PA arrived 15 or more minutes late, was diverted or was cancelled on 14% of 167 scheduled flights between September 2025 and August 2026. 0.6% 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.