Route reliability record
CLT→GSP
Charlotte to Greer
- Flights
- 1,532
- Period
- July 2025 to June 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, 6 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 1,532 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 82.4% of the time and Wednesday flights 79.7%, against 71.2% for the route overall.
The national on-time rate over the same period is 77.6%, so this route runs 6 points behind the country as a whole. Across a thousand flights that is about 64 extra late arrivals.
Key figures
On time
71.2%
Arrivals under 15 minutes late, of 1,505 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
1.70%
National rate is 1.81%
Best carrier
PSA
66.9% on time across 1,090 flights
These figures cover 1,532 flights between July 2025 and June 2026. Beyond the headline rate, 12.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
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 | 128 | 87.5% | 56 min | 0.00% | A+ |
| American Airlinesthin sample | 314 | 79.7% | 81 min | 2.87% | B |
| PSA Airlines | 1,090 | 66.9% | 77 min | 1.56% | C |
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. 2 of the top 3 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 | 73.3% | 76.3% | 3.98% | 11am–2pm, Wed | — |
| 2. CLT → AVLCharlotte to Asheville | American Airlines | 70.0% | 70.8% | 1.20% | 8pm–5am, Wed | — |
| 3. CLT → GSPCharlotte to Greer | PSA Airlines | 65.9% | 66.9% | 1.56% | 11am–2pm, Wed | — |
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 15 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am81 flights79.2%
- 11am–2pm170 flights82.4%
- 2pm–5pm200 flights69.0%
- 5pm–8pm483 flights72.1%
- 8pm–5am598 flights67.0%
Scale runs 60% 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 82.4% on time, ahead of 8pm–5am at 67.0%. 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 598 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 30 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 56.0% on time, 30 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. November was the busiest month here, with 154 flights.
Across the week, Wednesday is the strongest day at 79.7% on time and Sunday the weakest at 62.3%. 17 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Late-arriving aircraft accounts for 48% of the 33,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 48%Late-arriving aircraft
- 27%Carrier
- 14%National Airspace System
- 9%Extreme weather
- 0%Security
48% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 33,000 reported delay minutes here, that single category outweighs weather by 5 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 33,056 reported delay minutes.
Cancellations sit at 1.70% against a national 1.81%, which is ordinary. Diversions add another 0.07%.
Connections and stage length
What a delay here actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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 83.7% on time across 1,532 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 1,532 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 56.0%, a swing of 30 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 28.8% of the 1,532 flights in this analysis, against 22.4% 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?
71.2% of flights arrive on time here against a national 77.6%, a difference of 6 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 82.4% on time. The 8pm–5am window is the weakest at 67.0%, 15 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 56.0% on time, compared with 85.9% in September. Across the year that is 30 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 GSP87.5%
- American Airlines on CLT to GSP79.7%
- PSA Airlines on CLT to GSP66.9%
- CLT to MCO, a related route70.6%
- ATL to GSP, a related route83.9%
- CLT to ATL, a related route83.3%
- Envoy Air on-time record87.5%
- American Airlines on-time record79.7%
- PSA Airlines on-time record66.9%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.