Carrier route record
DLLAX→ATL
Delta Air Lines · Los Angeles to Atlanta
- Flights
- 3,811
- Period
- September 2025 to August 2026
- Share of route
- 79%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on LAX to ATL lands a B+, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 3,811 flights. The strongest carrier on the route with a full sample, Frontier Airlines, flew 489 at 68.2% on time.
The US average over the same twelve months is 77.3%, so there is little to separate Delta on LAX to ATL from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
80.8%
Arrivals under 15 minutes late, of 3,767 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
0.84%
National rate is 1.89%
Whole route
78.6%
Every carrier on LAX to ATL, 4,843 flights
These figures cover 3,811 flights between September 2025 and August 2026. The median arrival is 5 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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Carrier by carrier
Delta against every carrier on LAX to ATL
Delta flew 3,811 of the 4,843 flights on LAX to ATL, most of the route. Its 80.8% on time is 2 points better than the route as a whole, which runs 78.6%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Spirit at 85.5% to American at 66.5%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 2 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 167 | 85.5% | 68 min | 0.60% | A+ |
| Delta Air Lines (this page) | 3,811 | 80.8% | 66 min | 0.84% | B+ |
| Frontier Airlines | 489 | 68.2% | 65 min | 1.64% | C |
| American Airlines | 376 | 66.5% | 84 min | 0.53% | C+ |
No carrier stands out. Frontier tops the table at 68.2%, 2 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
Delta flight numbers on LAX to ATL
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Departure window
When Delta runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 17 points, against 2 points between the best and worst carrier.
- 5am–8am730 flights87.9%
- 8am–11am695 flights71.3%
- 11am–2pm770 flights83.0%
- 2pm–5pm420 flights81.2%
- 5pm–8pm219 flights86.6%
- 8pm–5am977 flights79.2%
Scale runs 65% to 95%.
Book the early departure. Flights leaving between 5am–8am arrive on time 87.9% of the time, against 71.3% for the morning window. That is 17 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 977 flights scheduled in it.
Across the year
Delta on LAX to ATL through the year
December is the weak month at 72.1% on time, against 89.1% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. July was the busiest month here, with 357 flights.
Across the week, Wednesday is the strongest day at 83.5% on time and Saturday the weakest at 77.4%, a spread of 6 points.
Arrival by arrival
How late Delta on LAX to ATL runs when it is late
Delta on LAX to ATL often beats the schedule: 945 of 3,767 completed flights, 25%, arrived 15 minutes or more early. The 722 late arrivals split 318 under half an hour, 200 between 30 and 60 minutes, and 204 an hour or more.
- 15+ min early945 flights25.1%
- Within 15 min2,100 flights55.7%
- 15–29 min late318 flights8.4%
- 30–59 min late200 flights5.3%
- 1–2 hours late115 flights3.1%
- 2+ hours late89 flights2.4%
Scale runs 0% to 100%.
Share of 3,767 completed flights by arrival against schedule.
185 of 708 late departures made up the time and arrived on time, 26% of them. In the other direction, 199 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ATL.
The worst days
Worst days for Delta on LAX to ATL
The latest arrival of the period was on 17 August 2026, 14 hours 18 minutes 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 |
|---|---|---|
| 17 August 2026 | 14 hours 18 minutes | Carrier |
| 21 April 2026 | 13 hours 14 minutes | Carrier |
| 26 July 2026 | 12 hours 41 minutes | Carrier |
| 11 October 2025 | 11 hours 27 minutes | Carrier |
| 8 December 2025 | 11 hours 2 minutes | Carrier |
Delay causes
Why Delta runs late on this route
Carrier accounts for 56% of the 48,000 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Carrier
- 26%Late-arriving aircraft
- 17%National Airspace System
- 1%Extreme weather
- 0%Security
The largest share of delay minutes, 56%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 27,000 of the 48,000 delay minutes reported here. The split is drawn from 47,657 reported delay minutes.
Cancellations are rare at 0.84%, 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 stage length
What a delay here costs
5.4% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
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.
The return leg runs 79.1% on time across 3,817 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 3,811 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Delta on LAX to ATL
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 89.1% on time and December 72.1%, a swing of 17 points. If the dates move at all, move them out of December before you think about anything else. 3,767 completed flights over 12 months sit behind that.
Related
Where to go next
- LAX to ATL, every carrier
- Delta on ATL to LAX, the return leg
- Spirit Airlines on LAX to ATL85.5%
- Frontier Airlines on LAX to ATL68.2%
- American Airlines on LAX to ATL66.5%
- Delta Air Lines network-wide record
- Los Angeles International (LAX) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- The best time of day to fly, according to 7.05 million flight records
- Worst months to fly in the US, ranked by the data
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.