Route reliability record
ATL→SNA
Atlanta to Santa Ana
- Flights
- 1,020
- Period
- September 2025 to August 2026
- Distance
- 1,919 mi
- Carriers
- 1
This route lands a B+, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That rests on 1,020 ATL to SNA flights, with a median arrival 1 minute early.
Best time to fly ATL to SNA: a 2pm–5pm departure, ideally on a Saturday. Flights in that window arrived on time 84.5% of the time and Saturday flights 84.4%, against 76.0% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.0%
Arrivals under 15 minutes late, of 1,004 completed flights
Avg delay
51 min
Across delayed arrivals only, not all flights
Cancelled
0.88%
National rate is 1.89%
Best carrier
Delta
76.0% on time across 1,020 flights
These figures cover 1,020 flights between September 2025 and August 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
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Carrier by carrier
Which airline is most reliable on ATL to SNA
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 |
|---|---|---|---|---|---|
| Delta Air Lines | 1,020 | 76.0% | 51 min | 0.88% | B+ |
Flight by flight
Flights on ATL to SNA
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Best ways to make this trip
The most reliable ways to fly Atlanta to Santa Ana
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 4 of the top 5 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. ATL → LAXAtlanta to Los Angeles | Delta Air Lines | 78.5% | 79.1% | 0.73% | 5am–8am, Wed | DL 898 08:05 |
| 2. ATL → SNAAtlanta to Santa Ana | Delta Air Lines | 75.3% | 76.0% | 0.88% | 2pm–5pm, Sat | DL 826 20:51 |
| 3. ATL → ONTAtlanta to Ontario | Delta Air Lines | 72.9% | 74.2% | 1.71% | 8am–11am, Wed | DL 665 09:41 |
| 4. ATL → LAXAtlanta to Los Angeles | American Airlines | 72.4% | 73.0% | 0.80% | 2pm–5pm, Wed | — |
| 5. ATL → LAXAtlanta to Los Angeles | Frontier Airlines | 69.4% | 70.5% | 1.63% | 8am–11am, Wed | F9 4315 10:35 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 15 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am279 flights74.6%
- 11am–2pm128 flights69.5%
- 2pm–5pm71 flights84.5%
- 5pm–8pm264 flights74.5%
- 8pm–5am278 flights79.6%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 69.5% on time against 84.5% for 2pm–5pm. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8am–11am window is the busiest, with 279 flights scheduled in it.
Explore
Filter ATL to SNA by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On ATL to SNA, the best departure window is 2pm–5pm at 84.5% on time and the worst is 11am–2pm at 69.5%, a wide gap of 15.0 points. All US flights leaving 2pm–5pm ran 71.9%.
- 5–8am—
- 8–11am74.6%
- 11am–2pm69.5%
- 2–5pm84.5%
- 5–8pm74.5%
- 8pm–5am79.6%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 14 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
February is the weak month at 70.0% on time, against 84.2% in January. 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. September was the busiest month here, with 103 flights.
Across the week, Saturday is the strongest day at 84.4% on time and Thursday the weakest at 72.6%, a spread of 12 points.
Delay causes
Why this route gets delayed
Carrier accounts for 56% of the 12,000 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Carrier
- 27%National Airspace System
- 13%Late-arriving aircraft
- 3%Extreme weather
- 1%Security
The largest share of delay minutes, 56%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,996 of the 12,000 delay minutes reported here. The split is drawn from 12,394 reported delay minutes.
Cancellations are rare at 0.88%, 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 actually 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 roughly 50 minutes, which a normal layover absorbs.
At 1,919 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 79.9% on time across 1,020 flights, 4 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 4 points of difference.
One caution: this is a thin sample. 1,020 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.
Work out the risk of missing a connection in SNA after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 1,020 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 76.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 1,004 completed flights over 12 months sit behind that.
Common questions
ATL to SNA questions
How often is ATL to SNA delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 24.0% of the 1,020 flights in this analysis, against 22.7% nationally. Delayed flights are late by roughly 50 minutes on average.
How reliable is ATL to SNA compared with the rest of the country?
76.0% of flights arrive on time here against a national 77.3%, a difference of about a point against it. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on ATL to SNA?
The 2pm–5pm departure window is the strongest at 84.5% on time. The 11am–2pm window is the weakest at 69.5%, 15 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 February delays on ATL to SNA?
February is the weakest month at 70.0% on time, compared with 84.2% in January. Across the year that is 14 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- SNA to ATL — the return legseparate record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- John Wayne Airport (SNA) delay statistics
- ATL to LGA, a related route72.3%
- SFO to SNA, a related route77.4%
- ATL to MCO, a related route70.3%
- Delta Air Lines on-time record76.0%
- 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
Direction matters. ATL to SNA and SNA to ATL are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.