About 6 in 10 DL 2804 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (59%); 5.0% were cancelled. The typical flight landed 20 minutes late.
DL 2804: BOS → ORD
Scheduled to leave Boston at 8:45 p.m. local time. Over the past year it arrived on time 41% of the time (140 flights), worse than other DL flights on the route at that hour (45%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from Boston to Chicago (99% of days). Delta Air Lines's last BOS–ORD flight was cancelled 5.0% of the time, against 4.2% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 7:30 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 21 | 24% |
| Tuesday | 20 | 50% |
| Wednesday | 20 | 55% |
| Thursday | 20 | 30% |
| Friday | 20 | 60% |
| Saturday | 19 | — |
| Sunday | 20 | 25% |
Why it was late
All flights BOS → ORD · Connecting off DL 2804? Check the risk
Questions
How often is DL 2804 from BOS to ORD late?
Delta Air Lines 2804 from Boston, MA to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 59% of 140 scheduled flights between September 2025 and August 2026. 5.0% 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.