Flight number record
DL 2507
Delta Air Lines · Austin to Miami
- Route
- AUS → MIA
- Departs
- 09:00
- Flights
- 283
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2507, check with Delta Air Lines.
DL 2507 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 283 flights, with a median arrival 12 minutes early.
Set against the rest of the country, DL 2507's record is 12 points better than the US average of 77.3%. That gap is worth roughly 123 fewer late arrivals for every thousand flights.
Key figures
On time
89.6%
Arrivals under 15 minutes late, of 279 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
1.41%
National rate is 1.89%
1 hour+ late
3.6%
National rate is 8.3%
These figures cover 283 flights between September 2025 and August 2026. The median arrival is 12 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 2507 flies
DL 2507 flies AUS to MIA without a single fixed slot. Its most common scheduled departure was 09:00, used on 99 of 283 flights, with 08:45 (62 flights) and 08:35 (57 flights) next.
- Departs 09:0099 flights35.0%
- Departs 08:4562 flights21.9%
- Departs 08:3557 flights20.1%
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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2507 runs 6 points better at 89.6%. 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 2507 next to AUS to MIA
Every carrier on AUS to MIA combined arrived on time 79.8% of the time across 2,236 flights, so DL 2507 is 10 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2507thin sample | 283 | 89.6% | 74 min | 1.41% | A |
| All Delta Air Lines on AUS–MIAthin sample | 283 | 89.6% | 74 min | 1.41% | A |
| All carriers on AUS–MIA | 2,236 | 79.8% | 73 min | 1.12% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2507 quarter by quarter
Quarter by quarter DL 2507 held fairly steady: 87.5% in Oct–Dec 2025, 87.6% in Jan–Mar 2026, 92.1% in Apr–Jun 2026 and 90.2% 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.
- Oct–Dec 202540 flights87.5%
- Jan–Mar 202690 flights87.6%
- Apr–Jun 202691 flights92.1%
- Jul–Sep 202662 flights90.2%
Scale runs 80% to 100%.
By weekday, DL 2507 did best on Tuesday at 95.0% on time and worst on Saturday at 75.6%. Each day rests on about 40 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2507 runs when it is late
DL 2507 often beats the schedule: 123 of 279 completed flights, 44%, arrived 15 minutes or more early. The 29 late arrivals split 12 under half an hour, 7 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early123 flights44.1%
- Within 15 min127 flights45.5%
- 15–29 min late12 flights4.3%
- 30–59 min late7 flights2.5%
- 1–2 hours late5 flights1.8%
- 2+ hours late5 flights1.8%
Scale runs 0% to 100%.
Share of 279 completed flights by arrival against schedule.
8 of 31 late departures made up the time and arrived on time, 26% of them. 6 flights left on time and still arrived late.
The worst days
Worst days for DL 2507
The latest arrival of the period was on 18 December 2025, 7 hours 49 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 March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 December 2025 | 7 hours 49 minutes | Carrier |
| 17 March 2026 | 4 hours 7 minutes | Carrier |
| 16 March 2026 | 3 hours 25 minutes | Carrier |
| 27 March 2026 | 2 hours 22 minutes | Late-arriving aircraft |
| 2 January 2026 | 2 hours 3 minutes | Carrier |
Delay causes
Why DL 2507 runs late
Carrier accounts for 73% of the 2,143 delay minutes carriers reported here, and the remaining four split what is left.
- 73%Carrier
- 17%National Airspace System
- 5%Late-arriving aircraft
- 5%Extreme weather
The largest share of delay minutes, 73%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,561 of the 2,143 delay minutes reported here. The split is drawn from 2,143 delay minutes reported on DL 2507.
Cancellations sit at 1.41% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.6% 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 1,103 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 GRB to MSP (1) and MSP to GRB (1), but none flew often enough under DL 2507 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to AUS to MIA only.
One caution: this is a thin sample. 283 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 2507
For a booking, DL 2507 has one of the better records a US domestic flight can show: 89.6% on time and 1.41% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- AUS to MIA, every carrier and departure
- MIA to AUS, the return direction
- Austin-Bergstrom International (AUS) delay statistics
- Miami International (MIA) 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.