Flight number record
YX 4787
Republic Airways · New York to Greer
- Route
- LGA → GSP
- Departs
- 20:27
- Flights
- 295
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 4787, check with Republic Airways. Republic Airways flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
YX 4787 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 295 flights, with a median arrival 10 minutes early.
The national on-time rate over the same period is 77.3%, so YX 4787 runs 9 points behind the country as a whole. Across a thousand flights that is about 85 extra late arrivals.
Key figures
On time
68.8%
Arrivals under 15 minutes late, of 263 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
10.85%
National rate is 1.89%
1 hour+ late
14.4%
National rate is 8.3%
These figures cover 295 flights between September 2025 and August 2026. Beyond the headline rate, 14.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When YX 4787 flies
YX 4787 flies LGA to GSP without a single fixed slot. Its most common scheduled departure was 20:27, used on 70 of 295 flights, with 19:55 (69 flights) and 19:59 (57 flights) next.
- Departs 20:2770 flights23.7%
- Departs 19:5569 flights23.4%
- Departs 19:5957 flights19.3%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 20:27 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and YX 4787 runs level with that at 68.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
YX 4787 next to LGA to GSP
Every carrier on LGA to GSP combined arrived on time 74.7% of the time across 914 flights, so YX 4787 is 6 points behind it. Across its whole network Republic Airways managed 78.1%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 4787thin sample | 295 | 68.8% | 80 min | 10.85% | C− |
| All Republic Airways on LGA–GSP | 914 | 74.7% | 69 min | 6.67% | C− |
| All carriers on LGA–GSP | 914 | 74.7% | 69 min | 6.67% | C− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 4787 quarter by quarter
YX 4787 did not run the same all year. Its best quarter was Jan–Mar 2026 at 73.5% on time and its weakest Oct–Dec 2025 at 63.5%, a swing of 10 points on roughly 98 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202526 flights—
- Oct–Dec 202579 flights63.5%
- Jan–Mar 202682 flights73.5%
- Apr–Jun 202672 flights69.6%
- Jul–Sep 202636 flights—
Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, YX 4787 did best on Friday at 76.3% on time and worst on Sunday at 59.1%. Each day rests on about 42 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 4787 runs when it is late
YX 4787 often beats the schedule: 107 of 263 completed flights, 41%, arrived 15 minutes or more early. The 82 late arrivals split 15 under half an hour, 29 between 30 and 60 minutes, and 38 an hour or more.
- 15+ min early107 flights40.7%
- Within 15 min74 flights28.1%
- 15–29 min late15 flights5.7%
- 30–59 min late29 flights11.0%
- 1–2 hours late22 flights8.4%
- 2+ hours late16 flights6.1%
Scale runs 0% to 100%.
Share of 263 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 72 departures that left 15 minutes late or more, only 5 made it up before arrival. In the other direction, 15 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at GSP.
The worst days
Worst days for YX 4787
The latest arrival of the period was on 29 July 2026, 9 hours 26 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 29 July 2026 | 9 hours 26 minutes | Extreme weather |
| 29 December 2025 | 3 hours 50 minutes | Carrier |
| 15 July 2026 | 3 hours 49 minutes | Late-arriving aircraft |
| 1 December 2025 | 3 hours 22 minutes | Late-arriving aircraft |
| 20 May 2026 | 3 hours 4 minutes | Late-arriving aircraft |
Delay causes
Why YX 4787 runs late
Late-arriving aircraft accounts for 64% of the 6,588 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Late-arriving aircraft
- 16%National Airspace System
- 14%Carrier
- 7%Extreme weather
64% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,588 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 6,588 delay minutes reported on YX 4787.
Cancellations run at 10.85%, against 1.89% nationally. That is about one flight in nine 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 routes
What a delay on this flight costs
14.4% 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 610 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.
Every one of the 295 flights under YX 4787 in the data flew LGA to GSP. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 295 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking YX 4787
For a booking, the cancellation rate is the figure to plan around on YX 4787: 10.85% of its 295 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- LGA to GSP, every carrier and departure
- GSP to LGA, the return direction
- LaGuardia (LGA) delay statistics
- Republic Airways on-time record
- Every Republic Airways flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Republic Airways’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.