Flight number record
DL 322
Delta Air Lines · Boston to Atlanta
- Route
- BOS → ATL
- Departs
- 14:00
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 322, check with Delta Air Lines.
DL 322 lands a B, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 364 flights, with a median arrival 5 minutes early.
Key figures
On time
78.0%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
1 hour+ late
7.0%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 5 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 322 flies
DL 322 flies BOS to ATL without a single fixed slot. Its most common scheduled departure was 14:00, used on 88 of 364 flights, with 13:55 (82 flights) and 13:45 (48 flights) next.
- Departs 14:0088 flights24.2%
- Departs 13:5582 flights22.5%
- Departs 13:4548 flights13.2%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 14:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 322 runs 6 points better at 78.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 322 next to BOS to ATL
Every carrier on BOS to ATL combined arrived on time 76.8% of the time across 5,050 flights, so DL 322 is about level with it. Delta flew 3,726 flights on the same city pair under all its flight numbers, including this one, and those ran 80.8% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 322thin sample | 364 | 78.0% | 62 min | 1.10% | B |
| All Delta Air Lines on BOS–ATL | 3,726 | 80.8% | 75 min | 1.85% | B |
| All carriers on BOS–ATL | 5,050 | 76.8% | 72 min | 2.24% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 322 quarter by quarter
DL 322 did not run the same all year. Its best quarter was Apr–Jun 2026 at 82.4% on time and its weakest Jul–Sep 2026 at 66.7%, a swing of 16 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights80.0%
- Oct–Dec 202592 flights78.3%
- Jan–Mar 202689 flights80.2%
- Apr–Jun 202691 flights82.4%
- Jul–Sep 202662 flights66.7%
Scale runs 60% to 90%.
By weekday, DL 322 did best on Wednesday at 90.4% on time and worst on Sunday at 62.7%. Each day rests on about 52 flights, so a gap of 28 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 322 runs when it is late
DL 322 often beats the schedule: 104 of 359 completed flights, 29%, arrived 15 minutes or more early. The 79 late arrivals split 26 under half an hour, 28 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early104 flights29.0%
- Within 15 min176 flights49.0%
- 15–29 min late26 flights7.2%
- 30–59 min late28 flights7.8%
- 1–2 hours late17 flights4.7%
- 2+ hours late8 flights2.2%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
21 of 79 late departures made up the time and arrived on time, 27% of them. In the other direction, 21 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ATL.
The worst days
Worst days for DL 322
The latest arrival of the period was on 14 June 2026, 7 hours 39 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 June 2026 | 7 hours 39 minutes | Carrier |
| 15 December 2025 | 6 hours 27 minutes | Carrier |
| 25 November 2025 | 3 hours 11 minutes | Late-arriving aircraft |
| 26 January 2026 | 3 hours 7 minutes | National Airspace System |
| 14 January 2026 | 2 hours 48 minutes | Carrier |
Delay causes
Why DL 322 runs late
Carrier accounts for 48% of the 4,897 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 28%Late-arriving aircraft
- 24%National Airspace System
The largest share of delay minutes, 48%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,370 of the 4,897 delay minutes reported here. The split is drawn from 4,897 delay minutes reported on DL 322.
Cancellations sit at 1.10% against a national 1.89%, which is ordinary. Diversions add another 0.27%.
Connections and routes
What a delay on this flight costs
7.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 946 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 364 flights under DL 322 in the data flew BOS to ATL. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 364 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking DL 322
For a booking, read DL 322 as 78.0% on time with 1.10% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BOS to ATL, every carrier and departure
- ATL to BOS, the return direction
- Delta Air Lines 695 on the same route86.0%
- Delta Air Lines 973 on the same route79.1%
- Delta Air Lines 456 on the same route89.4%
- Delta Air Lines 385 on the same route86.4%
- Delta Air Lines 923 on the same route87.2%
- Delta Air Lines 2464 on the same route74.9%
- Boston Logan International (BOS) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.