Flight number record
DL 1207
Delta Air Lines · Detroit to Dallas-Fort Worth
- Route
- DTW → DFW
- Departs
- 21:15
- Flights
- 362
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1207, check with Delta Air Lines.
DL 1207 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 362 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.6%, so DL 1207 runs 5 points behind the country as a whole. Across a thousand flights that is about 51 extra late arrivals.
Key figures
On time
72.5%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
1.38%
National rate is 1.81%
1 hour+ late
12.4%
National rate is 8.1%
These figures cover 362 flights between July 2025 and June 2026. Beyond the headline rate, 12.4% 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 1207 flies
DL 1207 flies DTW to DFW without a single fixed slot. Its most common scheduled departure was 21:15, used on 67 of 362 flights, with 19:57 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 21:1567 flights18.5%
- Departs 19:5737 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 21:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 1207 runs 2 points better at 72.5%. 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 1207 next to DTW to DFW
Every carrier on DTW to DFW combined arrived on time 75.3% of the time across 3,509 flights, so DL 1207 is 3 points behind it. Delta flew 1,405 flights on the same city pair under all its flight numbers, including this one, and those ran 76.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1207thin sample | 362 | 72.5% | 63 min | 1.38% | C |
| All Delta Air Lines on DTW–DFW | 1,405 | 76.3% | 57 min | 1.71% | B |
| All carriers on DTW–DFW | 3,509 | 75.3% | 76 min | 2.25% | B |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | B |
Across the year
DL 1207 quarter by quarter
DL 1207 did not run the same all year. Its best quarter was Apr–Jun 2026 at 78.7% on time and its weakest Jan–Mar 2026 at 66.3%, a swing of 12 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 flights72.8%
- Oct–Dec 202589 flights71.9%
- Jan–Mar 202690 flights66.3%
- Apr–Jun 202691 flights78.7%
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1207 did best on Thursday at 84.3% on time and worst on Saturday at 62.7%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 1207 runs late
One category carries most of the weight here. Carrier accounts for 50% of the 6,149 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.
- 50%Carrier
- 29%Late-arriving aircraft
- 20%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 50%, 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 3,045 of the 6,149 delay minutes reported here. The split is drawn from 6,149 delay minutes reported on DL 1207.
Cancellations sit at 1.38% against a national 1.81%, which is ordinary. Diversions add another 0.28%.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.4% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 986 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 362 flights under DL 1207 in the data flew DTW to DFW. 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. 362 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 1207
For a booking, DL 1207 is a flight to put a long connection behind. 12.4% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- DTW to DFW, every carrier and departure
- DFW to DTW, the return direction
- Delta Air Lines 2746 on the same route79.4%
- Delta Air Lines 1543 on the same route72.0%
- American Airlines 1108 on the same route85.4%
- Delta Air Lines 1041 on the same route82.7%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Dallas/Fort Worth International (DFW) 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
- How often a connection fails at the major US hubs
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.