Route reliability record
ORD→GSO
Chicago to Greensboro
- Flights
- 1,560
- Period
- September 2025 to August 2026
- Distance
- 589 mi
- Carriers
- 3
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 about an hour on average. That rests on 1,560 ORD to GSO flights, of which Envoy Air flew 947 at 78.0% on time.
Best time to fly ORD to GSO: a 8am–11am departure, ideally on a Tuesday. Flights in that window arrived on time 84.9% of the time and Tuesday flights 79.3%, against 76.1% 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
76.1%
Arrivals under 15 minutes late, of 1,513 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
3.01%
National rate is 1.89%
Best carrier
Envoy
78.0% on time across 947 flights
These figures cover 1,560 flights between September 2025 and August 2026. Beyond the headline rate, 9.3% 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 ORD to GSO
The choice of carrier is not cosmetic here. Envoy Air arrives on time 78.0% of the time; SkyWest Airlines manages 71.1%. Sample sizes sit next to every figure, because a two-point gap across 528 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 85 | 86.2% | 97 min | 5.88% | A− |
| Envoy Air | 947 | 78.0% | 71 min | 2.43% | B |
| SkyWest Airlines | 528 | 71.1% | 61 min | 3.60% | C− |
SkyWest Airlines cancels 3.6% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Flight by flight
Flights on ORD to GSO
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 Chicago to Greensboro
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. ORD → GSOChicago to Greensboro | Envoy Air | 76.1% | 78.0% | 2.43% | 8am–11am, Tue | MQ 3648 18:59 |
| 2. ORD → GSOChicago to Greensboro | SkyWest Airlines | 68.5% | 71.1% | 3.60% | 11am–2pm, Fri | OO 5395 13:43 |
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 7 points between the best and worst carrier.
- 5am–8am1 flights—
- 8am–11am366 flights84.9%
- 11am–2pm227 flights82.6%
- 2pm–5pm356 flights74.7%
- 5pm–8pm517 flights69.9%
- 8pm–5am93 flights63.5%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 63.5% on time, against 84.9% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5pm–8pm window is the busiest, with 517 flights scheduled in it.
Explore
Filter ORD to GSO 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 ORD to GSO, the best departure window is 8am–11am at 84.9% on time and the worst is 8pm–5am at 63.5%, a wide gap of 21.4 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am—
- 8–11am84.9%
- 11am–2pm82.6%
- 2–5pm74.7%
- 5–8pm69.9%
- 8pm–5am63.5%
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 32 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.
August is the worst month at 60.4% on time, 32 points below September, the best at 92.1%. 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. April was the busiest month here, with 178 flights.
Across the week, Tuesday is the strongest day at 79.3% on time and Wednesday the weakest at 71.8%, a spread of 8 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 47% of the 24,000 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Late-arriving aircraft
- 21%National Airspace System
- 21%Carrier
- 10%Extreme weather
47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 24,000 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 24,490 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 84.9% on time here.
Cancellations run at 3.01%, against 1.89% nationally. That is roughly one flight in 30 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
9.3% 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.
The 589 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 runs 77.3% on time across 1,560 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,560 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 GSO after this flight
What to do with this
Booking this route
Put together: the delay figures matter less here than the 3.01% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 1,513 completed flights over 12 months sit behind that.
Common questions
ORD to GSO questions
How often is ORD to GSO 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 23.9% of the 1,560 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on ORD to GSO?
Envoy Air leads at 78.0% on time across 947 flights. SkyWest Airlines is at the other end on 71.1%, a gap of 7 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on ORD to GSO?
The 8am–11am departure window is the strongest at 84.9% on time. The 8pm–5am window is the weakest at 63.5%, 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 August delays on ORD to GSO?
August is the weakest month at 60.4% on time, compared with 92.1% in September. Across the year that is 32 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
- GSO to ORD — the return legseparate record
- Chicago O'Hare International (ORD) delay statistics
- Envoy Air on ORD to GSO78.0%
- SkyWest Airlines on ORD to GSO71.1%
- ORD to LGA, a related route66.6%
- ATL to GSO, a related route83.7%
- ORD to BOS, a related route66.6%
- Republic Airways on-time record86.2%
- Envoy Air on-time record78.0%
- SkyWest Airlines on-time record71.1%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. ORD to GSO and GSO to ORD are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed ORD to GSO’s on-time badge on your site
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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.