Flight number record
DL 1682
Delta Air Lines · Houston to Atlanta
- Route
- IAH → ATL
- Departs
- 12:35
- Flights
- 342
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1682, check with Delta Air Lines.
DL 1682 lands a B, about a point worse than the national rate of 77.6%. About 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 342 flights, with a median arrival 3 minutes early.
Key figures
On time
76.6%
Arrivals under 15 minutes late, of 337 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
1.46%
National rate is 1.81%
1 hour+ late
8.0%
National rate is 8.1%
These figures cover 342 flights between July 2025 and June 2026. Beyond the headline rate, 8.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When DL 1682 flies
DL 1682 flies IAH to ATL without a single fixed slot. Its most common scheduled departure was 12:35, used on 36 of 342 flights, with 11:42 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 12:3536 flights10.5%
- Departs 11:4235 flights10.2%
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 12:35 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 1682 runs 2 points worse at 76.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
DL 1682 next to IAH to ATL
Every carrier on IAH to ATL combined arrived on time 77.5% of the time across 4,906 flights, so DL 1682 is about level with it. Delta flew 2,507 flights on the same city pair under all its flight numbers, including this one, and those ran 80.2% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1682thin sample | 342 | 76.6% | 55 min | 1.46% | B |
| All Delta Air Lines on IAH–ATL | 2,507 | 80.2% | 66 min | 2.07% | B |
| All carriers on IAH–ATL | 4,906 | 77.5% | 67 min | 1.92% | B |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | B |
Across the year
DL 1682 quarter by quarter
DL 1682 did not run the same all year. Its best quarter was Jan–Mar 2026 at 83.8% on time and its weakest Apr–Jun 2026 at 72.1%, a swing of 12 points on roughly 86 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 202588 flights77.9%
- Oct–Dec 202592 flights73.6%
- Jan–Mar 202676 flights83.8%
- Apr–Jun 202686 flights72.1%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1682 did best on Wednesday at 89.1% on time and worst on Monday at 63.5%. Each day rests on about 49 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 1682 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 60% of the 4,345 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 60%Late-arriving aircraft
- 20%Carrier
- 18%National Airspace System
- 2%Extreme weather
60% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 4,345 reported delay minutes here, that single category outweighs weather by 26 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 4,345 delay minutes reported on DL 1682.
Cancellations sit at 1.46% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.0% 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 689 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.
DL 1682 is not only a IAH to ATL flight. It also flew ATL to IAH (340 flights, 82.1% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 342 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ATL to IAHthin sample | 340 | 82.1% | 54 min | 1.47% | B |
What to do with this
Booking DL 1682
For a booking, read DL 1682 as 76.6% on time with 1.46% cancelled over 342 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAH to ATL, every carrier and departure
- ATL to IAH, the return direction
- Delta Air Lines 1315 on the same route88.5%
- Frontier Airlines 1404 on the same route66.9%
- Delta Air Lines 1069 on the same route91.0%
- Delta Air Lines 1585 on the same route77.8%
- Delta Air Lines 1572 on the same route78.9%
- Frontier Airlines 2400 on the same route53.3%
- George Bush Intercontinental (IAH) 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
- Why the first flight of the morning is statistically safest
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.