Flight number record
DL 1212
Delta Air Lines · Kansas City to Atlanta
- Route
- MCI → ATL
- Departs
- 07:00
- Flights
- 265
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1212, check with Delta Air Lines.
DL 1212 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.3 hours. That rests on 265 flights, with a median arrival 14 minutes early.
Set against the rest of the country, DL 1212's record is 17 points better than the US average of 77.3%. That gap is worth roughly 166 fewer late arrivals for every thousand flights.
Key figures
On time
93.9%
Arrivals under 15 minutes late, of 263 completed flights
Avg delay
139 min
Across delayed arrivals only, not all flights
Cancelled
0.75%
National rate is 1.89%
1 hour+ late
3.0%
National rate is 8.3%
These figures cover 265 flights between September 2025 and August 2026. The median arrival is 14 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 1212 flies
DL 1212 flies MCI to ATL without a single fixed slot. Its most common scheduled departure was 07:00, used on 160 of 265 flights, with 07:05 (41 flights) and 07:07 (27 flights) next.
- Departs 07:00160 flights60.4%
- Departs 07:0541 flights15.5%
- Departs 07:0727 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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1212 runs 5 points better at 93.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1212 next to MCI to ATL
Every carrier on MCI to ATL combined arrived on time 86.4% of the time across 3,246 flights, so DL 1212 is 8 points ahead of it. Delta flew 2,708 flights on the same city pair under all its flight numbers, including this one, and those ran 89.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1212thin sample | 265 | 93.9% | 139 min | 0.75% | A+ |
| All Delta Air Lines on MCI–ATL | 2,708 | 89.4% | 74 min | 1.48% | A |
| All carriers on MCI–ATL | 3,246 | 86.4% | 72 min | 1.32% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1212 quarter by quarter
Quarter by quarter DL 1212 held fairly steady: 96.7% in Jul–Sep 2025, 92.1% in Oct–Dec 2025, 92.3% in Apr–Jun 2026 and 96.8% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202590 flights92.1%
- Jan–Mar 20264 flights—
- Apr–Jun 202679 flights92.3%
- Jul–Sep 202662 flights96.8%
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1212 did best on Saturday at 100.0% on time and worst on Sunday at 81.6%. Each day rests on about 38 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1212 runs when it is late
DL 1212 often beats the schedule: 126 of 263 completed flights, 48%, arrived 15 minutes or more early. The 16 late arrivals split 4 under half an hour, 4 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early126 flights47.9%
- Within 15 min121 flights46.0%
- 15–29 min late4 flights1.5%
- 30–59 min late4 flights1.5%
- 1–2 hours late4 flights1.5%
- 2+ hours late4 flights1.5%
Scale runs 0% to 100%.
Share of 263 completed flights by arrival against schedule.
Only 13 of 263 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for DL 1212
The latest arrival of the period was on 28 December 2025, 16 hours 46 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 December 2025 | 16 hours 46 minutes | Carrier |
| 7 December 2025 | 3 hours 54 minutes | National Airspace System |
| 31 December 2025 | 3 hours 30 minutes | Carrier |
| 1 October 2025 | 3 hours 11 minutes | Carrier |
| 3 August 2026 | 1 hour 59 minutes | Carrier |
Delay causes
Why DL 1212 runs late
Carrier accounts for 78% of the 2,220 delay minutes carriers reported here, and the remaining four split what is left.
- 78%Carrier
- 17%National Airspace System
- 5%Extreme weather
The largest share of delay minutes, 78%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,733 of the 2,220 delay minutes reported here. The split is drawn from 2,220 delay minutes reported on DL 1212.
Cancellations are rare at 0.75%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.0% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 692 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.
The same number turns up on two other city pairs in the data, including ROC to DTW (62) and FSD to MSP (5), but none flew often enough under DL 1212 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MCI to ATL only.
One caution: this is a thin sample. 265 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 1212
For a booking, DL 1212 has one of the better records a US domestic flight can show: 93.9% on time and 0.75% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- MCI to ATL, every carrier and departure
- ATL to MCI, the return direction
- Delta Air Lines 1204 on the same route93.8%
- Delta Air Lines 1660 on the same route84.8%
- Delta Air Lines 3110 on the same route88.9%
- Delta Air Lines 2908 on the same route90.2%
- Delta Air Lines 2471 on the same route93.5%
- Kansas City International (MCI) 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.