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Route on-time record

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

Atlanta (Hartsfield Jackson Atlanta International Airport) to Greenville/Greer/Spartanburg (Greenville-Spartanburg International Airport). 2,806 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 1.7% were cancelled. The most reliable flight number was Delta 1974 at 11:26 AM.

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

ATL → GSP

Atlanta to Greenville/Greer/Spartanburg: 2,806 nonstop flights a year

On time (12 months)

82%

Cancelled

1.7%

avg delay 11 min

Best time to leave

Before 9 AM

91% on time vs 76% 3 to 6 PM

Most reliable airline

Delta

81% chance on time

Check ATL to GSP fares

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 · Delta 1974

    11:26 AM → 12:21 PM55m nonstop

    Local times, typical schedule. Last flown 2026-05-06.

    91%

    chance on time

    On time (history)
    100%
    Cancelled
    4.2%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (23 flights, Jun 2025 to May 2026).
    • Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find Delta 1974 fares Opens this date on Aviasales

  2. #2 · Delta 1273

    12:51 PM → 1:45 PM54m nonstop

    Local times, typical schedule. Last flown 2026-04-12.

    87%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 91% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).
    • Short track record (55 flights), so its score leans on the airline's record at this hour.

    Limited track record · 55 flights

    Find Delta 1273 fares Opens this date on Aviasales

  3. #3 · Delta 3089

    8:30 AM → 9:26 AM56m nonstop

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

    87%

    chance on time

    On time (history)
    89%
    Cancelled
    1.9%
    Avg arrival delay
    7 min
    • Arrived on time 89% of the time (151 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 76%).
    • Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).

    Moderate track record · 151 flights

    Find Delta 3089 fares Opens this date on Aviasales

  4. #4 · Delta 1725

    11:07 AM → 12:05 PM58m nonstop

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

    86%

    chance on time

    On time (history)
    87%
    Cancelled
    1.0%
    Avg arrival delay
    8 min
    • Arrived on time 87% of the time (189 flights, Jun 2025 to May 2026).
    • Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).

    Moderate track record · 189 flights

    Find Delta 1725 fares Opens this date on Aviasales

  5. #5 · Delta 3090

    10:04 AM → 11:05 AM1h 01m nonstop

    Local times, typical schedule. Last flown 2026-04-12.

    83%

    chance on time

    On time (history)
    83%
    Cancelled
    3.2%
    Avg arrival delay
    7 min
    • Arrived on time 83% of the time (30 flights, Jun 2025 to May 2026).
    • Cancelled 3.2% of the time (1 of 31).
    • Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).
    • Short track record (30 flights), so its score leans on the airline's record at this hour.

    Limited track record · 30 flights

    Find Delta 3090 fares Opens this date on Aviasales

  6. #6 · Delta 3147

    9:25 AM → 10:20 AM55m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    82%

    chance on time

    On time (history)
    84%
    Cancelled
    3.4%
    Avg arrival delay
    9 min
    • Arrived on time 84% of the time (86 flights, Jun 2025 to May 2026).
    • Cancelled 3.4% of the time (3 of 89).
    • Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).

    Moderate track record · 86 flights

    Find Delta 3147 fares Opens this date on Aviasales

  7. #7 · Delta 1021

    5:55 PM → 6:53 PM55m nonstop

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

    82%

    chance on time

    On time (history)
    85%
    Cancelled
    1.4%
    Avg arrival delay
    10 min
    • Arrived on time 85% of the time (138 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 76% on time; Before 9 AM: 91%).
    • Departs inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.

    Moderate track record · 138 flights

    Find Delta 1021 fares Opens this date on Aviasales

  8. #8 · Delta 3010

    1:24 PM → 2:17 PM54m nonstop

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

    80%

    chance on time

    On time (history)
    82%
    Cancelled
    3.0%
    Avg arrival delay
    11 min
    • Arrived on time 82% of the time (255 flights, Jun 2025 to May 2026).
    • Cancelled 3.0% of the time (8 of 264).
    • Departs inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.

    Strong track record · 255 flights

    Find Delta 3010 fares Opens this date on Aviasales

  9. #9 · Delta 3136

    8:59 PM → 9:52 PM58m nonstop

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

    79%

    chance on time

    On time (history)
    81%
    Cancelled
    3.1%
    Avg arrival delay
    12 min
    • Arrived on time 81% of the time (124 flights, Jun 2025 to May 2026).
    • Cancelled 3.1% of the time (4 of 128).
    • Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).

    Moderate track record · 124 flights

    Find Delta 3136 fares Opens this date on Aviasales

  10. #10 · Delta 2281

    11:01 PM → 11:54 PM57m nonstop

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

    77%

    chance on time

    On time (history)
    79%
    Cancelled
    1.8%
    Avg arrival delay
    13 min
    • Arrived on time 79% of the time (325 flights, Jun 2025 to May 2026).
    • Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).

    Strong track record · 325 flights

    Find Delta 2281 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Delta Air Lines81%

    2,806 flights · 82% on time as flown · 1.7% cancel

On time by departure time

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

  • Before 9 AM91%

    358 flights · avg delay 5 min

  • 9 AM to noon91%

    422 flights · avg delay 5 min

  • Noon to 3 PM84%

    444 flights · avg delay 9 min

  • 3 to 6 PM76%

    467 flights · avg delay 16 min

  • 6 to 9 PM77%

    590 flights · avg delay 14 min

  • After 9 PM78%

    525 flights · avg delay 13 min

Best day: Wednesday (88%). Worst: Sunday (79%).

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
82
F
86
M
82
A
87
M
79
J
79
J
76
A
84
S
89
O
88
N
90
D
86

What delays this route

  • Airline (crew, maintenance, boarding)54%
  • Late-arriving aircraft24%
  • Air traffic control and airport volume15%
  • Severe weather7%

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

ATL to GSP questions

What time of day is best to fly ATL to GSP?
Before 9 AM: 91% of flights arrived on time, against 76% for departures 3 to 6 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 ATL to GSP?
Delta, with a season-adjusted 81% chance of operating and arriving on time over 2,806 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 ATL to GSP?
July (76% on time); the best was November (90%), 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 ATL

Live status: FAA delays and ground stops