Flight number record
DL 390
Delta Air Lines · Los Angeles to Atlanta
- Route
- LAX → ATL
- Departs
- 06:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 390, check with Delta Air Lines.
DL 390 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 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 365 flights, with a median arrival 7 minutes early.
Set against the rest of the country, DL 390's record is 11 points better than the US average of 77.3%. That gap is worth roughly 112 fewer late arrivals for every thousand flights.
Key figures
On time
88.5%
Arrivals under 15 minutes late, of 364 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
4.4%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 7 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 390 flies
DL 390 flies LAX to ATL without a single fixed slot. Its most common scheduled departure was 06:00, used on 273 of 365 flights, with 06:15 (76 flights) next.
- Departs 06:00273 flights74.8%
- Departs 06:1576 flights20.8%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 390 runs level with that at 88.5%. 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 390 next to LAX to ATL
Every carrier on LAX to ATL combined arrived on time 78.6% of the time across 4,843 flights, so DL 390 is 10 points ahead of it. Delta flew 3,811 flights on the same city pair under all its flight numbers, including this one, and those ran 80.8% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 390 | 365 | 88.5% | 93 min | 0.27% | A+ |
| All Delta Air Lines on LAX–ATL | 3,811 | 80.8% | 66 min | 0.84% | B+ |
| All carriers on LAX–ATL | 4,843 | 78.6% | 68 min | 0.89% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 390 quarter by quarter
DL 390 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Oct–Dec 2025 at 81.5%, a swing of 19 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 flights81.5%
- Jan–Mar 202690 flights84.4%
- Apr–Jun 202691 flights92.2%
- Jul–Sep 202662 flights93.5%
Scale runs 75% to 100%.
By weekday, DL 390 ranged from 84.9% on Monday to 94.2% on Thursday. With about 52 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 390 runs when it is late
DL 390 often beats the schedule: 91 of 364 completed flights, 25%, arrived 15 minutes or more early. The 42 late arrivals split 18 under half an hour, 8 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early91 flights25.0%
- Within 15 min231 flights63.5%
- 15–29 min late18 flights4.9%
- 30–59 min late8 flights2.2%
- 1–2 hours late6 flights1.6%
- 2+ hours late10 flights2.7%
Scale runs 0% to 100%.
Share of 364 completed flights by arrival against schedule.
5 of 34 late departures made up the time and arrived on time, 15% of them. 13 flights left on time and still arrived late.
The worst days
Worst days for DL 390
The latest arrival of the period was on 20 December 2025, 10 hours 15 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 December 2025 | 10 hours 15 minutes | Carrier |
| 14 April 2026 | 9 hours 10 minutes | Late-arriving aircraft |
| 5 August 2026 | 6 hours 35 minutes | Carrier |
| 11 December 2025 | 5 hours 4 minutes | Carrier |
| 14 February 2026 | 3 hours 53 minutes | Carrier |
Delay causes
Why DL 390 runs late
Carrier accounts for 66% of the 3,922 delay minutes carriers reported here, and the remaining four split what is left.
- 66%Carrier
- 22%Late-arriving aircraft
- 10%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 66%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,588 of the 3,922 delay minutes reported here. The split is drawn from 3,922 delay minutes reported on DL 390.
Cancellations are rare at 0.27%, 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 4.4% 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.
At 1,947 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 365 flights under DL 390 in the data flew LAX to ATL. 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 390
For a booking, DL 390 has one of the better records a US domestic flight can show: 88.5% on time and 0.27% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAX to ATL, every carrier and departure
- ATL to LAX, the return direction
- Delta Air Lines 515 on the same route82.9%
- Delta Air Lines 782 on the same route79.8%
- Delta Air Lines 783 on the same route80.2%
- Delta Air Lines 899 on the same route79.5%
- Delta Air Lines 446 on the same route84.7%
- Delta Air Lines 528 on the same route84.7%
- Los Angeles International (LAX) 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.