Flight number record
DL 1027
Delta Air Lines · Atlanta to Burlington
- Route
- ATL → BTV
- Departs
- 20:10
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1027, check with Delta Air Lines.
DL 1027 lands a B, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That rests on 364 flights, with a median arrival 4 minutes early.
Key figures
On time
77.3%
Arrivals under 15 minutes late, of 353 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
1.92%
National rate is 1.89%
1 hour+ late
5.7%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 4 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 1027 flies
DL 1027 flies ATL to BTV without a single fixed slot. Its most common scheduled departure was 20:10, used on 86 of 364 flights, with 21:25 (37 flights) next.
- Departs 20:1086 flights23.6%
- Departs 21:2537 flights10.2%
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 20:10 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1027 runs 7 points better at 77.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 1027 next to ATL to BTV
Every carrier on ATL to BTV combined arrived on time 78.2% of the time across 391 flights, so DL 1027 is about level with it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1027thin sample | 364 | 77.3% | 48 min | 1.92% | B |
| All Delta Air Lines on ATL–BTV | 391 | 78.2% | 47 min | 1.79% | B |
| All carriers on ATL–BTV | 391 | 78.2% | 47 min | 1.79% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1027 quarter by quarter
DL 1027 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 67.8%, a swing of 26 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 flights93.3%
- Oct–Dec 202592 flights82.2%
- Jan–Mar 202690 flights68.6%
- Apr–Jun 202691 flights81.8%
- Jul–Sep 202661 flights67.8%
Scale runs 60% to 100%.
By weekday, DL 1027 did best on Saturday at 83.7% on time and worst on Friday at 68.6%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1027 runs when it is late
The 80 late arrivals split 26 under half an hour, 34 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early84 flights23.8%
- Within 15 min189 flights53.5%
- 15–29 min late26 flights7.4%
- 30–59 min late34 flights9.6%
- 1–2 hours late16 flights4.5%
- 2+ hours late4 flights1.1%
Scale runs 0% to 100%.
Share of 353 completed flights by arrival against schedule.
18 of 80 late departures made up the time and arrived on time, 23% of them. In the other direction, 18 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 BTV.
The worst days
Worst days for DL 1027
The latest arrival of the period was on 22 February 2026, 2 hours 52 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 February 2026 | 2 hours 52 minutes | Late-arriving aircraft |
| 22 May 2026 | 2 hours 12 minutes | Late-arriving aircraft |
| 13 July 2026 | 2 hours 1 minute | Carrier |
| 21 February 2026 | 2 hours | Carrier |
| 10 November 2025 | 1 hour 49 minutes | Carrier |
Delay causes
Why DL 1027 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,829 reported delay minutes.
- 38%Carrier
- 32%Late-arriving aircraft
- 27%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 38%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,471 of the 3,829 delay minutes reported here. The split is drawn from 3,829 delay minutes reported on DL 1027.
Cancellations sit at 1.92% against a national 1.89%, which is ordinary. Diversions add another 1.10%.
Connections and routes
What a delay on this flight costs
5.7% 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 roughly 50 minutes, which a normal layover absorbs.
The 961 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 1027 in the data flew ATL to BTV. 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 1027
For a booking, read DL 1027 as 77.3% on time with 1.92% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- 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.