Route reliability record
ATL→OAJ
Atlanta to Jacksonville
- Flights
- 736
- Period
- September 2025 to August 2026
- Distance
- 399 mi
- Carriers
- 1
This route sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land close to two hours behind schedule. That rests on 736 ATL to OAJ flights, with a median arrival 3 minutes early.
Best time to fly ATL to OAJ: a 8am–11am departure, ideally on a Thursday. Flights in that window arrived on time 85.5% of the time and Thursday flights 78.7%, against 74.9% 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
74.9%
Arrivals under 15 minutes late, of 716 completed flights
Avg delay
119 min
Across delayed arrivals only, not all flights
Cancelled
2.58%
National rate is 1.89%
Best carrier
SkyWest
74.9% on time across 736 flights
These figures cover 736 flights between September 2025 and August 2026. Beyond the headline rate, 11.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on ATL to OAJ
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 |
|---|---|---|---|---|---|
| SkyWest Airlines | 736 | 74.9% | 119 min | 2.58% | C |
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Best ways to make this trip
The most reliable ways to fly Atlanta to Jacksonville
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. 1 of the top 2 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. ATL → ILMAtlanta to Wilmington | Delta Air Lines | 83.1% | 83.9% | 0.96% | 8am–11am, Wed | DL 3070 22:40 |
| 2. ATL → OAJAtlanta to Jacksonville | SkyWest Airlines | 73.0% | 74.9% | 2.58% | 8am–11am, Thu | — |
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 21 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am203 flights85.5%
- 11am–2pm108 flights78.3%
- 2pm–5pm205 flights65.0%
- 5pm–8pm7 flights—
- 8pm–5am213 flights73.0%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 85.5% of the time, against 65.0% for the afternoon window. That is 21 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 213 flights scheduled in it.
Explore
Filter ATL to OAJ 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 OAJ, the best departure window is 8am–11am at 85.5% on time and the worst is 2pm–5pm at 65.0%, a wide gap of 20.5 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am—
- 8–11am85.5%
- 11am–2pm78.3%
- 2–5pm65.0%
- 5–8pm—
- 8pm–5am73.0%
best all US flightsScale 55% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 22 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.
April is the best month on the calendar at 86.2% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. March was the busiest month here, with 118 flights.
Across the week, Thursday is the strongest day at 78.7% on time and Friday the weakest at 70.8%, a spread of 8 points.
Delay causes
Why this route gets delayed
Carrier accounts for 75% of the 21,000 delay minutes carriers reported here, and the remaining four split what is left.
- 75%Carrier
- 17%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 17% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.9 times the usual weather exposure. The split is drawn from 21,403 reported delay minutes.
The largest share of delay minutes, 75%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 16,000 of the 21,000 delay minutes reported here.
Cancellations run at 2.58%, against 1.89% nationally. That is about one flight in 40 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
11.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 399 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 79.8% on time across 735 flights, 5 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 5 points of difference.
One caution: this is a thin sample. 736 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 OAJ after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 736 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 74.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 716 completed flights over 12 months sit behind that.
Common questions
ATL to OAJ questions
How often is ATL to OAJ 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 25.1% of the 736 flights in this analysis, against 22.7% nationally. Delayed flights are late by close to two hours on average.
How reliable is ATL to OAJ compared with the rest of the country?
74.9% of flights arrive on time here against a national 77.3%, a difference of 2 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 OAJ?
The 8am–11am departure window is the strongest at 85.5% on time. The 2pm–5pm window is the weakest at 65.0%, 21 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 May delays on ATL to OAJ?
May is the weakest month at 63.8% on time, compared with 86.2% in April. Across the year that is 22 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
- OAJ to ATL — the return legseparate record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- ATL to LGA, a related route72.3%
- ATL to MCO, a related route70.3%
- ATL to FLL, a related route70.7%
- SkyWest Airlines on-time record74.9%
- The US routes with the most cancellations
- The best time of day to fly, according to 7.05 million flight records
Direction matters. ATL to OAJ and OAJ 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.