Carrier route record
DLLAX→ATL
Delta Air Lines · Los Angeles to Atlanta
- Flights
- 3,844
- Period
- July 2025 to June 2026
- Share of route
- 77%
- Carriers
- 4
Historical statistics for July 2025 to June 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 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 3,844 flights. The strongest carrier on the route with a full sample, American Airlines, flew 379 at 66.8% on time.
The US average over the same twelve months is 77.6%, 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
81.5%
Arrivals under 15 minutes late, of 3,801 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
0.86%
National rate is 1.81%
Whole route
78.4%
Every carrier on LAX to ATL, 5,013 flights
These figures cover 3,844 flights between July 2025 and June 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.
Carrier by carrier
Delta against every carrier on LAX to ATL
Delta flew 3,844 of the 5,013 flights on LAX to ATL, most of the route. Its 81.5% on time is 3 points better than the route as a whole, which runs 78.4%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Spirit at 84.7% to Frontier at 60.1%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. American Airlines arrives on time 66.8% of the time; Frontier Airlines manages 60.1%. Sample sizes sit next to every figure, because a two-point gap across 520 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 270 | 84.7% | 67 min | 0.74% | B+ |
| Delta Air Lines (this page) | 3,844 | 81.5% | 64 min | 0.86% | B+ |
| American Airlines | 379 | 66.8% | 85 min | 0.53% | C+ |
| Frontier Airlines | 520 | 60.1% | 69 min | 1.73% | D |
American leads Frontier by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
Delta flight numbers on LAX to ATL
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 11 points, against 7 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am732 flights88.1%
- 8am–11am695 flights79.0%
- 11am–2pm799 flights81.7%
- 2pm–5pm407 flights80.1%
- 5pm–8pm258 flights85.9%
- 8pm–5am953 flights77.6%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 88.1% of the time, against 77.6% for the overnight window. That is 11 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 953 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 361 flights.
Across the week, Wednesday is the strongest day at 84.6% on time and Saturday the weakest at 79.1%. 6 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Delta runs late on this route
One category carries most of the weight here. Carrier accounts for 57% of the 45,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 57%Carrier
- 26%Late-arriving aircraft
- 16%National Airspace System
- 1%Extreme weather
- 0%Security
The largest share of delay minutes, 57%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 26,000 of the 45,000 delay minutes reported here. The split is drawn from 44,603 reported delay minutes.
Cancellations are rare at 0.86%, below the national 1.81% 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
5.1% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 79.6% on time across 3,849 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 3,844 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. 3,801 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 ATL84.7%
- American Airlines on LAX to ATL66.8%
- Frontier Airlines on LAX to ATL60.1%
- 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 7.04 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.