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ATIS Alerts Smart Flight Search

Find the flight least likely to be delayed

Beta

We rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.

GSP → ATL

Greenville/Greer/Spartanburg to Atlanta: 2,807 nonstop flights a year

On time (12 months)

89%

Cancelled

1.7%

avg delay 9 min

Best time to leave

Before 9 AM

93% on time vs 81% 6 to 9 PM

Most reliable airline

Delta

88% chance on time

Check GSP to ATL 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 3028

    5:40 AM → 6:43 AM1h 02m nonstop

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

    94%

    chance on time

    On time (history)
    97%
    Cancelled
    3.0%
    Avg arrival delay
    5 min
    • Arrived on time 97% of the time (161 flights, Jun 2025 to May 2026).
    • Cancelled 3.0% of the time (5 of 166).
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 81%).

    Moderate track record · 161 flights

    Find Delta 3028 fares Opens this date on Aviasales

  2. #2 · Delta 3089

    10:13 AM → 11:15 AM1h 02m nonstop

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

    91%

    chance on time

    On time (history)
    92%
    Cancelled
    1.7%
    Avg arrival delay
    6 min
    • Arrived on time 92% of the time (339 flights, Jun 2025 to May 2026).

    Strong track record · 339 flights

    Find Delta 3089 fares Opens this date on Aviasales

  3. #3 · Delta 1146

    6:45 AM → 7:50 AM1h 05m nonstop

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

    90%

    chance on time

    On time (history)
    92%
    Cancelled
    2.4%
    Avg arrival delay
    8 min
    • Arrived on time 92% of the time (162 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 81%).

    Moderate track record · 162 flights

    Find Delta 1146 fares Opens this date on Aviasales

  4. #4 · Delta 2158

    11:06 AM → 12:06 PM1h 00m nonstop

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

    89%

    chance on time

    On time (history)
    90%
    Cancelled
    1.1%
    Avg arrival delay
    8 min
    • Arrived on time 90% of the time (275 flights, Jun 2025 to May 2026).

    Strong track record · 275 flights

    Find Delta 2158 fares Opens this date on Aviasales

  5. #5 · Delta 1619

    8:30 AM → 9:36 AM1h 06m nonstop

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

    88%

    chance on time

    On time (history)
    91%
    Cancelled
    2.7%
    Avg arrival delay
    8 min
    • Arrived on time 91% of the time (142 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 81%).

    Moderate track record · 142 flights

    Find Delta 1619 fares Opens this date on Aviasales

  6. #6 · Delta 1725

    1:09 PM → 2:14 PM1h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 1537; its record covers all of them.

    88%

    chance on time

    On time (history)
    90%
    Cancelled
    1.4%
    Avg arrival delay
    8 min
    • Arrived on time 90% of the time (210 flights, Jun 2025 to May 2026).
    • Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.

    Strong track record · 210 flights

    Find Delta 1725 fares Opens this date on Aviasales

  7. #7 · Delta 3197

    11:56 AM → 1:01 PM1h 05m nonstop

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

    87%

    chance on time

    On time (history)
    87%
    Cancelled
    3.2%
    Avg arrival delay
    4 min
    • Arrived on time 87% of the time (30 flights, Jun 2025 to May 2026).
    • Cancelled 3.2% of the time (1 of 31).
    • Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
    • Short track record (30 flights), so its score leans on the airline's record at this hour.

    Limited track record · 30 flights

    Find Delta 3197 fares Opens this date on Aviasales

  8. #8 · Delta 3147

    11:28 AM → 12:32 PM1h 04m nonstop

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

    86%

    chance on time

    On time (history)
    84%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 84% of the time (19 flights, Jun 2025 to May 2026).
    • Short track record (19 flights), so its score leans on the airline's record at this hour.

    Limited track record · 19 flights

    Find Delta 3147 fares Opens this date on Aviasales

  9. #9 · Delta 3010

    3:00 PM → 4:06 PM1h 06m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 1273; its record covers all of them.

    84%

    chance on time

    On time (history)
    85%
    Cancelled
    1.6%
    Avg arrival delay
    13 min
    • Arrived on time 85% of the time (314 flights, Jun 2025 to May 2026).
    • Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.

    Strong track record · 314 flights

    Find Delta 3010 fares Opens this date on Aviasales

  10. #10 · Delta 1021

    7:59 PM → 9:14 PM1h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 3007; its record covers all of them.

    82%

    chance on time

    On time (history)
    82%
    Cancelled
    1.1%
    Avg arrival delay
    20 min
    • Arrived on time 82% of the time (179 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 81% on time; Before 9 AM: 93%).

    Moderate track record · 179 flights

    Find Delta 1021 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Delta Air Lines88%

    2,807 flights · 89% on time as flown · 1.7% cancel

On time by departure time

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

  • Before 9 AM93%

    1,064 flights · avg delay 6 min

  • 9 AM to noon92%

    552 flights · avg delay 6 min

  • Noon to 3 PM89%

    432 flights · avg delay 8 min

  • 3 to 6 PM82%

    535 flights · avg delay 18 min

  • 6 to 9 PM81%

    224 flights · avg delay 19 min

Best day: Wednesday (92%). Worst: Sunday (87%).

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