Skip to content

All Products

Aviation Intelligence

Alerts & Airspace

Free Pilot Tools & Widgets

RC Aviation

Games & Learning

Weather Research & More

Pilot Resources

My Airports

Your shortcuts, saved on this device. Search to add an airport.

No airports saved yet. Add the fields you visit most.

Ask ATIS

Route on-time record

LGA to GSP: most on-time flights and the best time to fly

New York (LaGuardia Airport) to Greenville/Greer/Spartanburg (Greenville-Spartanburg International Airport). 942 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 8.0% were cancelled. The most reliable flight number was Republic 4449 at 9:44 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

LGA → GSP

New York to Greenville/Greer/Spartanburg: 942 nonstop flights a year

On time (12 months)

76%

Cancelled

8.0%

avg delay 18 min

Best time to leave

Before 9 AM

85% on time vs 71% 6 to 9 PM

Most reliable airline

Republic

69% chance on time

Check LGA to GSP fares

Lowest nonstop fare seen in the next two months: $312 (American 4787 on 2026-11-09). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · Republic 4449 · sold as American Eagle, Delta Connection or United Express

    9:44 AM → 12:05 PM2h 21m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    80%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 93% of the time (42 flights, Jun 2025 to May 2026).
    • Never cancelled in 42 scheduled flights.
    • Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).
    • Short track record (42 flights), so its score leans on the airline's record at this hour.

    Limited track record · 42 flights

    Find 9:44 AM flight fares Opens this date on Aviasales

  2. #2 · Republic 4423 · sold as American Eagle, Delta Connection or United Express

    3:11 PM → 5:28 PM2h 17m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Republic 4448; its record covers all of them.

    73%

    chance on time

    On time (history)
    85%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 85% of the time (53 flights, Jun 2025 to May 2026).
    • Never cancelled in 53 scheduled flights.
    • Departs inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
    • Short track record (53 flights), so its score leans on the airline's record at this hour.

    Limited track record · 53 flights

    Find 3:11 PM flight fares Opens this date on Aviasales

  3. #3 · Republic 4534 · sold as American Eagle, Delta Connection or United Express

    9:59 AM → 12:14 PM2h 15m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    69%

    chance on time

    On time (history)
    74%
    Cancelled
    8.3%
    Avg arrival delay
    19 min
    • Arrived on time 74% of the time (244 flights, Jun 2025 to May 2026).
    • Cancelled 8.3% of the time (22 of 266).
    • Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).

    Strong track record · 244 flights

    Find 9:59 AM flight fares Opens this date on Aviasales

  4. #4 · Republic 4364 · sold as American Eagle, Delta Connection or United Express

    3:59 PM → 6:13 PM2h 14m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    66%

    chance on time

    On time (history)
    70%
    Cancelled
    7.9%
    Avg arrival delay
    23 min
    • Arrived on time 70% of the time (128 flights, Jun 2025 to May 2026).
    • Cancelled 7.9% of the time (11 of 139).
    • Departs inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
    • 73% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 128 flights

    Find 3:59 PM flight fares Opens this date on Aviasales

  5. #5 · Republic 4787 · sold as American Eagle, Delta Connection or United Express

    7:59 PM → 10:19 PM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    63%

    chance on time

    On time (history)
    71%
    Cancelled
    12.5%
    Avg arrival delay
    23 min
    • Arrived on time 71% of the time (273 flights, Jun 2025 to May 2026).
    • Cancelled 12.5% of the time (39 of 312).
    • Leaves in this route's least on-time window (6 to 9 PM: 71% on time; Before 9 AM: 85%).
    • Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).

    Strong track record · 273 flights

    Find 7:59 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Republic Airways (sold as American Eagle, Delta Connection or United Express)69%

    942 flights · 76% on time as flown · 8.0% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM85%

    118 flights · avg delay 7 min

  • 9 AM to noon81%

    167 flights · avg delay 11 min

  • Noon to 3 PM83%

    51 flights · avg delay 10 min

  • 3 to 6 PM72%

    299 flights · avg delay 23 min

  • 6 to 9 PM71%

    304 flights · avg delay 23 min

Best day: Saturday (88%). Worst: Friday (79%).

Smarter routing

Nearby airports that run more on time

  • EWR → GSP 79% chance on time

    Newark Liberty International Airport to Greenville-Spartanburg International Airport · 743 flights a year · 17 mi from your airports · yours: 70%

    Rank flightsFares

  • LGA → AVL 76% chance on time

    LaGuardia Airport to Asheville Regional Airport · 444 flights a year · 42 mi from your airports · yours: 70%

    Rank flightsFares

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
79
F
80
M
78
A
86
M
82
J
76
J
70
A
83
S
91
O
87
N
85
D
78

What delays this route

  • Late-arriving aircraft58%
  • Air traffic control and airport volume24%
  • Airline (crew, maintenance, boarding)17%
  • Severe weather2%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

Finding the most reliable connections from LGA to GSP…

LGA to GSP questions

What time of day is best to fly LGA to GSP?
Before 9 AM: 85% of flights arrived on time, against 71% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from LGA to GSP?
Republic, with a season-adjusted 69% chance of operating and arriving on time over 942 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on LGA to GSP?
July (70% on time); the best was September (91%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from LGA

Live status: FAA delays and ground stops