Route reliability record
GSO→ATL
Greensboro to Atlanta
- Flights
- 2,730
- Period
- September 2025 to August 2026
- Distance
- 306 mi
- Carriers
- 1
This route earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 2,730 GSO to ATL flights, with a median arrival 17 minutes early.
Best time to fly GSO to ATL: a 5am–8am departure, ideally on a Thursday. Flights in that window arrived on time 93.7% of the time and Thursday flights 92.8%, against 89.2% for the route overall.
Set against the rest of the country, this route's record is 12 points better than the US average of 77.3%. That gap is worth roughly 119 fewer late arrivals for every thousand flights.
Key figures
On time
89.2%
Arrivals under 15 minutes late, of 2,669 completed flights
Avg delay
100 min
Across delayed arrivals only, not all flights
Cancelled
2.09%
National rate is 1.89%
Best carrier
Delta
89.2% on time across 2,730 flights
These figures cover 2,730 flights between September 2025 and August 2026. The median arrival is 17 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 GSO to ATL
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 | 2,730 | 89.2% | 100 min | 2.09% | A |
Flight by flight
Flights on GSO to ATL
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 14 points, against half a point between the best and worst carrier.
- 5am–8am718 flights93.7%
- 8am–11am688 flights92.9%
- 11am–2pm327 flights90.3%
- 2pm–5pm483 flights83.4%
- 5pm–8pm360 flights83.8%
- 8pm–5am154 flights79.3%
Scale runs 70% to 100%.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.7% of the time, against 79.3% for the overnight window. That is 14 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 718 flights scheduled in it.
Explore
Filter GSO to ATL 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 GSO to ATL, the best departure window is 5am–8am at 93.7% on time and the worst is 8pm–5am at 79.3%, a wide gap of 14.4 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am93.7%
- 8–11am92.9%
- 11am–2pm90.3%
- 2–5pm83.4%
- 5–8pm83.8%
- 8pm–5am79.3%
best all US flightsScale 60% to 100%.
Across the year
When delays peak on this route
This route's year swings by 16 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 79.7% on time, 16 points below September, the best at 95.4%. 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. October was the busiest month here, with 253 flights.
Across the week, Thursday is the strongest day at 92.8% on time and Sunday the weakest at 85.4%, a spread of 7 points.
Delay causes
Why this route gets delayed
Carrier accounts for 47% of the 29,000 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Carrier
- 35%Late-arriving aircraft
- 11%National Airspace System
- 7%Extreme weather
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 29,000 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 28,919 reported delay minutes.
The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 14,000 of the 29,000 delay minutes reported here.
Cancellations sit at 2.09% against a national 1.89%, which is ordinary. Diversions add another 0.15%.
Connections and stage length
What a delay here actually costs
5.1% 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 close to two hours, which a normal layover absorbs.
At 306 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 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 83.7% on time across 2,730 flights, 6 points below 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 6 points of difference.
The sample behind these figures is 2,730 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 ATL 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 95.4% on time and July 79.7%, a swing of 16 points. If the dates move at all, move them out of July before you think about anything else. 2,669 completed flights over 12 months sit behind that.
Common questions
GSO to ATL questions
How often is GSO to ATL delayed?
About one flight in nine arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 10.8% of the 2,730 flights in this analysis, against 22.7% nationally. Delayed flights are late by close to two hours on average.
How reliable is GSO to ATL compared with the rest of the country?
89.2% of flights arrive on time here against a national 77.3%, a difference of 12 points in its favour. That is worth a A on this site's grading scale.
What time of day has the fewest delays on GSO to ATL?
The 5am–8am departure window is the strongest at 93.7% on time. The 8pm–5am window is the weakest at 79.3%, 14 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 GSO to ATL?
July is the weakest month at 79.7% on time, compared with 95.4% in September. Across the year that is 16 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
- ATL to GSO — the return legseparate record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- GSO to LGA, a related route76.0%
- LGA to ATL, a related route75.5%
- GSO to ORD, a related route77.3%
- Delta Air Lines on-time record89.2%
- The most punctual routes in the US, and the least
- Why the first flight of the morning is statistically safest
Direction matters. GSO to ATL and ATL to GSO 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.