Flight number record
DL 306
Delta Air Lines · Austin to Los Angeles
- Route
- AUS → LAX
- Departs
- 07:20
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 306, check with Delta Air Lines.
DL 306 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 13 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 365 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 306's record is 13 points better than the US average of 77.3%. That gap is worth roughly 125 fewer late arrivals for every thousand flights.
Key figures
On time
89.8%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
1 hour+ late
3.0%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 10 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 306 flies
DL 306 flies AUS to LAX without a single fixed slot. Its most common scheduled departure was 07:20, used on 206 of 365 flights, with 07:25 (50 flights) next.
- Departs 07:20206 flights56.4%
- Departs 07:2550 flights13.7%
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 07:20 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 306 runs level with that at 89.8%. 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 306 next to AUS to LAX
Every carrier on AUS to LAX combined arrived on time 82.6% of the time across 4,084 flights, so DL 306 is 7 points ahead of it. Delta flew 1,293 flights on the same city pair under all its flight numbers, including this one, and those ran 84.7% on time. 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 306 | 365 | 89.8% | 81 min | 1.10% | A |
| All Delta Air Lines on AUS–LAX | 1,293 | 84.7% | 65 min | 1.16% | B |
| All carriers on AUS–LAX | 4,084 | 82.6% | 66 min | 0.66% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 306 quarter by quarter
DL 306 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Apr–Jun 2026 at 85.7%, a swing of 14 points on roughly 73 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 flights100.0%
- Oct–Dec 202592 flights92.4%
- Jan–Mar 202690 flights88.4%
- Apr–Jun 202691 flights85.7%
- Jul–Sep 202662 flights88.7%
Scale runs 75% to 100%.
By weekday, DL 306 ranged from 86.0% on Sunday to 94.2% on Monday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 306 runs when it is late
DL 306 often beats the schedule: 148 of 361 completed flights, 41%, arrived 15 minutes or more early. Most of the lateness is short. 21 of the 37 late arrivals were under half an hour behind, and 11 reached an hour or more.
- 15+ min early148 flights41.0%
- Within 15 min176 flights48.8%
- 15–29 min late21 flights5.8%
- 30–59 min late5 flights1.4%
- 1–2 hours late4 flights1.1%
- 2+ hours late7 flights1.9%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 23 departures that left 15 minutes late or more, only 2 made it up before arrival. 16 flights left on time and still arrived late.
The worst days
Worst days for DL 306
The latest arrival of the period was on 3 June 2026, 9 hours 1 minute behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 June 2026 | 9 hours 1 minute | Carrier |
| 22 August 2026 | 5 hours 36 minutes | Carrier |
| 21 January 2026 | 5 hours 15 minutes | Carrier |
| 15 March 2026 | 5 hours 8 minutes | Carrier |
| 28 April 2026 | 4 hours 54 minutes | Carrier |
Delay causes
Why DL 306 runs late
Carrier accounts for 83% of the 3,010 delay minutes carriers reported here, and the remaining four split what is left.
- 83%Carrier
- 11%National Airspace System
- 6%Late-arriving aircraft
- 0%Extreme weather
The largest share of delay minutes, 83%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,498 of the 3,010 delay minutes reported here. The split is drawn from 3,010 delay minutes reported on DL 306.
Cancellations sit at 1.10% 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 3.0% 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 1,242 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 365 flights under DL 306 in the data flew AUS to LAX. 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. 365 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 306
For a booking, DL 306 has one of the better records a US domestic flight can show: 89.8% on time and 1.10% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- AUS to LAX, every carrier and departure
- LAX to AUS, the return direction
- Austin-Bergstrom International (AUS) delay statistics
- Los Angeles International (LAX) 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.