Route reliability record
CLT→GSP
Charlotte to Greer
- Flights
- 1,539
- Period
- September 2025 to August 2026
- Distance
- 75 mi
- Carriers
- 3
This route sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 1,539 CLT to GSP flights, with a median arrival 3 minutes early.
Best time to fly CLT to GSP: a 11am–2pm departure, ideally on a Wednesday. Flights in that window arrived on time 82.3% of the time and Wednesday flights 79.8%, against 69.7% for the route overall.
The national on-time rate over the same period is 77.3%, so this route runs 8 points behind the country as a whole. Across a thousand flights that is about 76 extra late arrivals.
Key figures
On time
69.7%
Arrivals under 15 minutes late, of 1,505 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
2.08%
National rate is 1.89%
Best carrier
PSA
64.9% on time across 1,108 flights
These figures cover 1,539 flights between September 2025 and August 2026. Beyond the headline rate, 12.7% 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 CLT to GSP
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 |
|---|---|---|---|---|---|
| Envoy Airthin sample | 152 | 84.1% | 59 min | 0.66% | B+ |
| American Airlinesthin sample | 279 | 81.1% | 74 min | 3.23% | B− |
| PSA Airlines | 1,108 | 64.9% | 83 min | 1.99% | D |
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Best ways to make this trip
The most reliable ways to fly Charlotte to Greer
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. CLT → AVLCharlotte to Asheville | PSA Airlines | 68.0% | 71.0% | 4.27% | 11am–2pm, Wed | — |
| 2. CLT → GSPCharlotte to Greer | PSA Airlines | 63.6% | 64.9% | 1.99% | 11am–2pm, Tue | — |
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 22 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am81 flights79.2%
- 11am–2pm198 flights82.3%
- 2pm–5pm175 flights60.8%
- 5pm–8pm410 flights74.5%
- 8pm–5am675 flights64.1%
Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 82.3% on time, ahead of 2pm–5pm at 60.8%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 8pm–5am window is the busiest, with 675 flights scheduled in it.
Explore
Filter CLT to GSP 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 CLT to GSP, the best departure window is 11am–2pm at 82.3% on time and the worst is 2pm–5pm at 60.8%, a wide gap of 21.5 points. All US flights leaving 11am–2pm ran 78.3%.
- 5–8am—
- 8–11am79.2%
- 11am–2pm82.3%
- 2–5pm60.8%
- 5–8pm74.5%
- 8pm–5am64.1%
best all US flightsScale 50% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 35 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 50.9% on time, 35 points below September, the best at 85.9%. 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. August was the busiest month here, with 154 flights.
Across the week, Wednesday is the strongest day at 79.8% on time and Sunday the weakest at 59.4%, a spread of 20 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 47% of the 37,000 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Late-arriving aircraft
- 30%Carrier
- 13%National Airspace System
- 10%Extreme weather
- 0%Security
47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 37,000 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 36,804 reported delay minutes.
Cancellations sit at 2.08% against a national 1.89%, which is ordinary. Diversions add another 0.13%.
Connections and stage length
What a delay here actually costs
12.7% 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 75 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 11am–2pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 82.3% on time across 1,538 flights, 13 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 13 points of difference.
The sample behind these figures is 1,539 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 GSP 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 85.9% on time and July 50.9%, a swing of 35 points. If the dates move at all, move them out of July before you think about anything else. 1,505 completed flights over 12 months sit behind that.
Common questions
CLT to GSP questions
How often is CLT to GSP delayed?
Roughly one flight in three arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 30.3% of the 1,539 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is CLT to GSP compared with the rest of the country?
69.7% of flights arrive on time here against a national 77.3%, a difference of 8 points against it. That is worth a C on this site's grading scale.
What time of day has the fewest delays on CLT to GSP?
The 11am–2pm departure window is the strongest at 82.3% on time. The 2pm–5pm window is the weakest at 60.8%, 22 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 CLT to GSP?
July is the weakest month at 50.9% on time, compared with 85.9% in September. Across the year that is 35 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
- GSP to CLT — the return legseparate record
- Charlotte Douglas International (CLT) delay statistics
- Envoy Air on CLT to GSP84.1%
- American Airlines on CLT to GSP81.1%
- PSA Airlines on CLT to GSP64.9%
- CLT to MCO, a related route71.6%
- ATL to GSP, a related route83.7%
- CLT to ORD, a related route72.4%
- Envoy Air on-time record84.1%
- American Airlines on-time record81.1%
- PSA Airlines on-time record64.9%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. CLT to GSP and GSP to CLT 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.