Flight number record
DL 1207
Delta Air Lines · Detroit to Dallas-Fort Worth
- Route
- DTW → DFW
- Departs
- 21:15
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. 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 77.3%, so DL 1207 runs 4 points behind the country as a whole. Across a thousand flights that is about 43 extra late arrivals.
Key figures
On time
73.0%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
1.38%
National rate is 1.89%
1 hour+ late
13.2%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. Beyond the headline rate, 13.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 20:46 (49 flights) and 19:57 (37 flights) next.
- Departs 21:1567 flights18.5%
- Departs 20:4649 flights13.5%
- Departs 19:5737 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 21:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1207 runs 3 points better at 73.0%. 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 1207 next to DTW to DFW
Every carrier on DTW to DFW combined arrived on time 75.8% of the time across 3,482 flights, so DL 1207 is 3 points behind it. Delta flew 1,406 flights on the same city pair under all its flight numbers, including this one, and those ran 77.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1207thin sample | 362 | 73.0% | 65 min | 1.38% | C |
| All Delta Air Lines on DTW–DFW | 1,406 | 77.4% | 57 min | 1.71% | B |
| All carriers on DTW–DFW | 3,482 | 75.8% | 73 min | 2.24% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1207 quarter by quarter
DL 1207 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jan–Mar 2026 at 66.3%, a swing of 24 points on roughly 72 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 flights90.0%
- Oct–Dec 202589 flights71.9%
- Jan–Mar 202690 flights66.3%
- Apr–Jun 202691 flights78.7%
- Jul–Sep 202662 flights67.7%
Scale runs 60% to 95%.
By weekday, DL 1207 did best on Thursday at 84.3% on time and worst on Sunday at 66.0%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1207 runs when it is late
DL 1207 often beats the schedule: 102 of 356 completed flights, 29%, arrived 15 minutes or more early. The 96 late arrivals split 26 under half an hour, 23 between 30 and 60 minutes, and 47 an hour or more.
- 15+ min early102 flights28.7%
- Within 15 min158 flights44.4%
- 15–29 min late26 flights7.3%
- 30–59 min late23 flights6.5%
- 1–2 hours late35 flights9.8%
- 2+ hours late12 flights3.4%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
17 of 98 late departures made up the time and arrived on time, 17% of them. 15 flights left on time and still arrived late.
The worst days
Worst days for DL 1207
The latest arrival of the period was on 29 December 2025, 4 hours 10 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 29 December 2025 | 4 hours 10 minutes | Carrier |
| 24 June 2026 | 4 hours 9 minutes | Carrier |
| 9 November 2025 | 3 hours 15 minutes | Late-arriving aircraft |
| 15 March 2026 | 2 hours 43 minutes | Carrier |
| 5 August 2026 | 2 hours 39 minutes | Late-arriving aircraft |
Delay causes
Why DL 1207 runs late
Carrier accounts for 51% of the 6,217 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Carrier
- 29%Late-arriving aircraft
- 18%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 51%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,196 of the 6,217 delay minutes reported here. The split is drawn from 6,217 delay minutes reported on DL 1207.
Cancellations sit at 1.38% against a national 1.89%, which is ordinary. Diversions add another 0.28%.
Connections and routes
What a delay on this flight costs
13.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
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. 13.2% 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 route80.6%
- Delta Air Lines 1543 on the same route73.7%
- American Airlines 1108 on the same route85.4%
- Delta Air Lines 1041 on the same route84.4%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.