Route reliability record
GSP→CLT
Greer to Charlotte
- Flights
- 1,532
- Period
- July 2025 to June 2026
- Distance
- 75 mi
- Carriers
- 3
This route lands a B, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 1,532 GSP to CLT flights, with a median arrival 11 minutes early.
Best time to fly GSP to CLT: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 90.8% of the time and Wednesday flights 86.6%, against 83.7% for the route overall.
Set against the rest of the country, this route's record is 6 points better than the US average of 77.6%. That gap is worth roughly 61 fewer late arrivals for every thousand flights.
Key figures
On time
83.7%
Arrivals under 15 minutes late, of 1,498 completed flights
Avg delay
102 min
Across delayed arrivals only, not all flights
Cancelled
2.15%
National rate is 1.81%
Best carrier
PSA
84.3% on time across 1,090 flights
These figures cover 1,532 flights between July 2025 and June 2026. Beyond the headline rate, 8.1% 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 GSP to CLT
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 |
|---|---|---|---|---|---|
| PSA Airlines | 1,090 | 84.3% | 114 min | 2.11% | B |
| Envoy Airthin sample | 129 | 82.8% | 50 min | 0.78% | B+ |
| American Airlinesthin sample | 313 | 81.9% | 87 min | 2.88% | B |
Best ways to make this trip
The most reliable ways to fly Greer to Charlotte
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. GSP → CLTGreer to Charlotte | PSA Airlines | 82.5% | 84.3% | 2.11% | 5am–8am, Thu | — |
| 2. AVL → CLTAsheville to Charlotte | PSA Airlines | 82.0% | 85.0% | 3.51% | 5am–8am, Wed | — |
| 3. AVL → CLTAsheville to Charlotte | American Airlines | 79.9% | 80.9% | 1.19% | 8am–11am, 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 31 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–8am719 flights90.8%
- 8am–11am298 flights90.2%
- 11am–2pm197 flights83.4%
- 2pm–5pm106 flights59.4%
- 5pm–8pm212 flights62.9%
- 8pm–5am—
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 90.8% of the time, against 59.4% for the afternoon window. That is 31 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 719 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 27 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 69.5% on time, 27 points below September, the best at 96.0%. 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 86.6% on time and Sunday the weakest at 78.6%. 8 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 55% of the 25,000 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.
- 55%Late-arriving aircraft
- 31%Carrier
- 8%National Airspace System
- 6%Extreme weather
- 0%Security
55% 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 25,000 reported delay minutes here, that single category outweighs weather by 9 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 24,846 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 90.8% on time here.
Cancellations sit at 2.15% against a national 1.81%, which is ordinary. Diversions add another 0.07%.
Connections and stage length
What a delay here actually costs
8.1% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 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 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 71.2% on time across 1,532 flights, 13 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 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 CLT 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 96.0% on time and July 69.5%, a swing of 27 points. If the dates move at all, move them out of July before you think about anything else. 1,498 completed flights over 12 months sit behind that.
Common questions
GSP to CLT questions
How often is GSP to CLT 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 16.3% of the 1,532 flights in this analysis, against 22.4% nationally. Delayed flights are late by close to two hours on average.
How reliable is GSP to CLT compared with the rest of the country?
83.7% of flights arrive on time here against a national 77.6%, a difference of 6 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on GSP to CLT?
The 5am–8am departure window is the strongest at 90.8% on time. The 2pm–5pm window is the weakest at 59.4%, 31 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 GSP to CLT?
July is the weakest month at 69.5% on time, compared with 96.0% in September. Across the year that is 27 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
- CLT to GSP — the return legseparate record
- Charlotte Douglas International (CLT) delay statistics
- PSA Airlines on GSP to CLT84.3%
- Envoy Air on GSP to CLT82.8%
- American Airlines on GSP to CLT81.9%
- GSP to ATL, a related route90.4%
- MCO to CLT, a related route78.4%
- GSP to ORD, a related route74.9%
- PSA Airlines on-time record84.3%
- Envoy Air on-time record82.8%
- American Airlines on-time record81.9%
- 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. GSP to CLT and CLT to GSP 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.