Flight number record
DL 1027
Delta Air Lines · Atlanta to Burlington
- Route
- ATL → BTV
- Departs
- 20:10
- Flights
- 365
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 3 minutes early.
Key figures
On time
77.7%
Arrivals under 15 minutes late, of 354 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
2.19%
National rate is 1.81%
1 hour+ late
5.4%
National rate is 8.1%
These figures cover 365 flights between July 2025 and June 2026. The median arrival is 3 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.
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 107 of 365 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 20:10107 flights29.3%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
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 70.5%, and DL 1027 runs 7 points better at 77.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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 387 flights, so DL 1027 is about level with it. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1027 | 365 | 77.7% | 62 min | 2.19% | B |
| All Delta Air Lines on ATL–BTV | 387 | 78.2% | 64 min | 2.07% | B |
| All carriers on ATL–BTV | 387 | 78.2% | 64 min | 2.07% | B |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | B |
Across the year
DL 1027 quarter by quarter
DL 1027 did not run the same all year. Its best quarter was Oct–Dec 2025 at 82.2% on time and its weakest Jan–Mar 2026 at 68.6%, a swing of 14 points on roughly 91 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 202592 flights77.8%
- Oct–Dec 202592 flights82.2%
- Jan–Mar 202690 flights68.6%
- Apr–Jun 202691 flights81.8%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1027 did best on Wednesday at 82.4% on time and worst on Friday at 64.7%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
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 4,885 reported delay minutes.
- 41%National Airspace System
- 38%Carrier
- 16%Late-arriving aircraft
- 4%Extreme weather
The largest share of delay minutes, 38%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,854 of the 4,885 delay minutes reported here. The split is drawn from 4,885 delay minutes reported on DL 1027.
Cancellations sit at 2.19% against a national 1.81%, which is ordinary. Diversions add another 0.82%.
Connections and routes
What a delay on this flight costs
5.4% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
Every one of the 365 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. 365 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 77.7% on time with 2.19% cancelled over 365 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.