Route reliability record
ATL→LAX
Atlanta to Los Angeles
- Flights
- 189,811
- Period
- June 2025 to May 2026
- Distance
- 1,942 mi
- Carriers
- 1
This route carries a cancellation problem, not just a delay problem: 5.1% of scheduled flights never operate, against 2.2% nationally. Of the ones that do fly, about seven flights in ten arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 189,811 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 75.9%, so this route runs 5 points behind the country as a whole. Across a thousand flights that is about 53 extra late arrivals.
Key figures
On time
70.6%
Arrivals under 15 minutes late, of 179,590 completed flights
Avg delay
50 min
Across delayed arrivals only, not all flights
Cancelled
5.10%
National rate is 2.23%
Best carrier
PSA
70.6% on time across 189,811 flights
These figures cover 190,000 flights between June 2025 and May 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Which airline is most reliable on ATL to LAX
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| PSA Airlines | 189,811 | 70.6% | 57 min | 5.10% | C− |
Departure window
The best time of day to leave
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 190,000 flights.
- 5am–8am29,421 flights71.8%
- 8am–11am38,911 flights71.2%
- 11am–2pm35,115 flights70.6%
- 2pm–5pm33,217 flights69.9%
- 5pm–8pm34,166 flights69.2%
- 8pm–5am18,981 flights70.2%
Scale runs 60% to 75%. Rows with fewer than 30 flights show a dash.
The time of day barely matters here. The 5am–8am window tops the set at 71.8% and 5pm–8pm sits at 69.2%, 3 points apart across 189,811 flights. Pick the departure that suits the trip: whatever is going wrong here is not accumulating over the course of the day.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 189,811 flights. The strip shows how much of this route's record is set by the calendar rather than by the operation.
The year is unusually even here, with only 3 points between the best and worst months. July is the softest at 69.0%, but the seasonal effect is small enough that it should not drive when you travel.
Across the week, Saturday is the strongest day at 74.8% on time and Friday the weakest at 67.4%. 7 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Carrier accounts for 42% of the 2.66 million 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.
- 42%Carrier
- 25%National Airspace System
- 22%Late-arriving aircraft
- 10%Extreme weather
- 0%Security
The largest share of delay minutes, 42%, 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 1.13 million of the 2.66 million delay minutes reported here.
Cancellations run at 5.10%, against 2.23% nationally. That is about one flight in twenty cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here actually costs
8.9% of arrivals land an hour or more late, close to the national 8.6%. 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 are the about 50 minutes kind, which a normal layover absorbs.
At 1,942 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 is a different operation and performs like one: it runs 81.2% on time across 12,505 flights, 11 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 11 points of difference.
189,811 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
What to do with this
Booking this route
Put together: the delay figures matter less here than the 5.10% cancellation rate. A late arrival costs you about 50 minutes; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic.
Common questions
ATL to LAX questions
How often is ATL to LAX delayed?
Roughly one flight in three arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 29.4% of the 189,811 flights in this analysis, against 24.1% nationally. Delayed flights are late by about 50 minutes on average.
How reliable is ATL to LAX compared with the rest of the country?
70.6% of flights arrive on time here against a national 75.9%, a difference of 5 points against it. That is worth a C− on this site's grading scale.
What time of day has the fewest delays on ATL to LAX?
The 5am–8am departure window is the strongest at 71.8% on time. The 5pm–8pm window is the weakest at 69.2%, 3 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on ATL to LAX?
July is the weakest month at 69.0% on time, compared with 71.6% in September. Across the year that is 3 points between the best and worst months. The seasonal swing is modest enough that it should not decide when you travel.
Related
Where to go next
- LAX to ATL — the return legseparate record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Los Angeles International (LAX) delay statistics
- PSA Airlines on-time record70.6%
- What a cancellation rate actually tells you (and what it hides)
- Connecting flights: how much buffer the data says you need
Direction matters. ATL to LAX and LAX to ATL are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.