About 1 in 2 DL 2646 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (44%); 5.4% were cancelled. The typical flight landed 3 minutes late.
DL 2646: BOS → ORD
Scheduled to leave Boston at 4:15 p.m. local time. Over the past year it arrived on time 56% of the time (259 flights), in line with other DL flights on the route at that hour (56%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 40 | 43% |
| Tuesday | 38 | 63% |
| Wednesday | 38 | 61% |
| Thursday | 37 | 57% |
| Friday | 39 | 69% |
| Saturday | 29 | 48% |
| Sunday | 38 | 47% |
Why it was late
All flights BOS → ORD · Connecting off DL 2646? Check the risk
DL 2646: ORD → BOS
Scheduled to leave Chicago at 7:25 p.m. local time. Over the past year it arrived on time 54% of the time (170 flights), better than other DL flights on the route at that hour (51%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from Chicago to Boston (100% of days). Delta Air Lines's last ORD–BOS flight was cancelled 6.9% of the time, against 3.4% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 7:10 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 27 | 48% |
| Tuesday | 26 | 69% |
| Wednesday | 26 | 58% |
| Thursday | 25 | 36% |
| Friday | 25 | 72% |
| Saturday | 16 | — |
| Sunday | 25 | 40% |
Why it was late
All flights ORD → BOS · Connecting off DL 2646? Check the risk
Questions
How often is DL 2646 from BOS to ORD late?
Delta Air Lines 2646 from Boston, MA to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 44% of 259 scheduled flights between September 2025 and August 2026. 5.4% were cancelled.
How often is DL 2646 from ORD to BOS late?
Delta Air Lines 2646 from Chicago, IL to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 46% of 170 scheduled flights between September 2025 and August 2026. 8.8% 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.