Route reliability record
ATL→OKC
Atlanta to Oklahoma City
- Flights
- 1,813
- Period
- September 2025 to August 2026
- Distance
- 761 mi
- Carriers
- 3
This route lands a B, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 1,813 ATL to OKC flights, with a median arrival 9 minutes early.
Best time to fly ATL to OKC: a 8am–11am departure, ideally on a Wednesday. Flights in that window arrived on time 88.5% of the time and Wednesday flights 87.9%, against 82.1% for the route overall.
Set against the rest of the country, this route's record is 5 points better than the US average of 77.3%. That gap is worth roughly 48 fewer late arrivals for every thousand flights.
Key figures
On time
82.1%
Arrivals under 15 minutes late, of 1,764 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
2.65%
National rate is 1.89%
Best carrier
Delta
83.0% on time across 1,723 flights
These figures cover 1,813 flights between September 2025 and August 2026. The median arrival is 9 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
Which airline is most reliable on ATL to OKC
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 |
|---|---|---|---|---|---|
| Southwest Airlinesthin sample | 1 | 100.0% | — | 0.00% | A+ |
| Delta Air Lines | 1,723 | 83.0% | 58 min | 2.61% | B |
| Frontier Airlinesthin sample | 89 | 64.0% | 83 min | 3.37% | D− |
Flight by flight
Flights on ATL to OKC
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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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 12 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am370 flights88.5%
- 11am–2pm327 flights83.3%
- 2pm–5pm400 flights76.2%
- 5pm–8pm356 flights81.4%
- 8pm–5am360 flights81.8%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 88.5% of the time, against 76.2% for the afternoon window. That is 12 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 400 flights scheduled in it.
Explore
Filter ATL to OKC 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 OKC, the best departure window is 8am–11am at 88.5% on time and the worst is 2pm–5pm at 76.2%, a wide gap of 12.3 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am—
- 8–11am88.5%
- 11am–2pm83.3%
- 2–5pm76.2%
- 5–8pm81.4%
- 8pm–5am81.8%
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 20 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.
July is the worst month at 70.8% on time, 20 points below September, the best at 90.7%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 162 flights.
Across the week, Wednesday is the strongest day at 87.9% on time and Sunday the weakest at 74.7%, a spread of 13 points.
Delay causes
Why this route gets delayed
Carrier accounts for 52% of the 19,000 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 33%Late-arriving aircraft
- 12%National Airspace System
- 3%Extreme weather
- 0%Security
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 9,856 of the 19,000 delay minutes reported here. The split is drawn from 19,030 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 88.5% on time here.
Cancellations run at 2.65%, 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
5.9% 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.
The 761 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 86.5% on time across 1,813 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.
The sample behind these figures is 1,813 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.
Work out the risk of missing a connection in OKC after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 90.7% on time and July 70.8%, a swing of 20 points. If the dates move at all, move them out of July before you think about anything else. 1,764 completed flights over 12 months sit behind that.
Common questions
ATL to OKC questions
How often is ATL to OKC delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 17.9% of the 1,813 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
How reliable is ATL to OKC compared with the rest of the country?
82.1% of flights arrive on time here against a national 77.3%, a difference of 5 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on ATL to OKC?
The 8am–11am departure window is the strongest at 88.5% on time. The 2pm–5pm window is the weakest at 76.2%, 12 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 OKC?
July is the weakest month at 70.8% on time, compared with 90.7% in September. Across the year that is 20 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
- OKC to ATL — the return legseparate record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- ATL to LGA, a related route72.3%
- DFW to OKC, a related route73.0%
- ATL to MCO, a related route70.3%
- Southwest Airlines on-time record100.0%
- Delta Air Lines on-time record83.0%
- Frontier Airlines on-time record64.0%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. ATL to OKC and OKC 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.