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Route on-time record

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

Chicago (Chicago O'Hare International Airport) to Greenville/Greer/Spartanburg (Greenville-Spartanburg International Airport). 1,768 nonstop flights in Jun 2025 to May 2026, 71% arrived within 15 minutes and 4.1% were cancelled. The most reliable flight number was Envoy 3556 at 8:00 AM.

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

ORD → GSP

Chicago to Greenville/Greer/Spartanburg: 1,768 nonstop flights a year

On time (12 months)

71%

Cancelled

4.1%

avg delay 21 min

Best time to leave

Before 9 AM

84% on time vs 62% 6 to 9 PM

Most reliable airline

Republic

76% chance on time

Check ORD to GSP fares

Lowest nonstop fare seen in the next two months: $290 (American 5295 on 2026-11-04). 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 · Envoy 3556 · sold as American Eagle

    8:00 AM → 11:04 AM2h 04m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Envoy 3918; its record covers all of them.

    80%

    chance on time

    On time (history)
    83%
    Cancelled
    1.9%
    Avg arrival delay
    12 min
    • Arrived on time 83% of the time (155 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 62%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Moderate track record · 155 flights

    Find 8:00 AM flight fares Opens this date on Aviasales

  2. #2 · Republic 3517 · sold as American Eagle, Delta Connection or United Express

    5:45 PM → 8:47 PM2h 02m nonstop

    Local times, typical schedule. Last flown 2026-04-29.

    77%

    chance on time

    On time (history)
    87%
    Cancelled
    3.1%
    Avg arrival delay
    13 min
    • Arrived on time 87% of the time (31 flights, Jun 2025 to May 2026).
    • Cancelled 3.1% of the time (1 of 32).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • 83% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 31 flights

    Find 5:45 PM flight fares Opens this date on Aviasales

  3. #3 · Envoy 3731 · sold as American Eagle

    4:53 PM → 7:46 PM1h 53m nonstop

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

    75%

    chance on time

    On time (history)
    80%
    Cancelled
    6.3%
    Avg arrival delay
    12 min
    • Arrived on time 80% of the time (163 flights, Jun 2025 to May 2026).
    • Cancelled 6.3% of the time (11 of 175).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 163 flights

    Find 4:53 PM flight fares Opens this date on Aviasales

  4. #4 · Envoy 3559 · sold as American Eagle

    3:08 PM → 6:11 PM2h 03m nonstop

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

    72%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find 3:08 PM flight fares Opens this date on Aviasales

  5. #5 · SkyWest 5330 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:00 AM → 9:57 AM1h 57m nonstop

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

    71%

    chance on time

    On time (history)
    81%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 81% of the time (31 flights, Jun 2025 to May 2026).
    • Never cancelled in 31 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 62%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Limited track record · 31 flights

    Find 7:00 AM flight fares Opens this date on Aviasales

  6. #6 · Envoy 4242 · sold as American Eagle

    4:42 PM → 7:46 PM2h 04m nonstop

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

    70%

    chance on time

    On time (history)
    73%
    Cancelled
    3.7%
    Avg arrival delay
    21 min
    • Arrived on time 73% of the time (103 flights, Jun 2025 to May 2026).
    • Cancelled 3.7% of the time (4 of 107).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 103 flights

    Find 4:42 PM flight fares Opens this date on Aviasales

  7. #7 · Envoy 4154 · sold as American Eagle

    8:00 PM → 11:03 PM2h 03m nonstop

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

    70%

    chance on time

    On time (history)
    75%
    Cancelled
    5.0%
    Avg arrival delay
    18 min
    • Arrived on time 75% of the time (57 flights, Jun 2025 to May 2026).
    • Cancelled 5.0% of the time (3 of 60).
    • Leaves in this route's least on-time window (6 to 9 PM: 62% on time; Before 9 AM: 84%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).

    Limited track record · 57 flights

    Find 8:00 PM flight fares Opens this date on Aviasales

  8. #8 · SkyWest 5403 · sold as United Express, Delta Connection, American Eagle or Alaska

    2:00 PM → 4:59 PM1h 59m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as SkyWest 5597; its record covers all of them.

    66%

    chance on time

    On time (history)
    74%
    Cancelled
    2.9%
    Avg arrival delay
    17 min
    • Arrived on time 74% of the time (66 flights, Jun 2025 to May 2026).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 66 flights

    Find 2:00 PM flight fares Opens this date on Aviasales

  9. #9 · Envoy 3610 · sold as American Eagle

    7:15 PM → 10:18 PM2h 03m nonstop

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

    66%

    chance on time

    On time (history)
    64%
    Cancelled
    0.0%
    Avg arrival delay
    20 min
    • Arrived on time 64% of the time (11 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 62% on time; Before 9 AM: 84%).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find 7:15 PM flight fares Opens this date on Aviasales

  10. #10 · SkyWest 5336 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:50 PM → 10:58 PM2h 08m nonstop

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

    62%

    chance on time

    On time (history)
    75%
    Cancelled
    4.8%
    Avg arrival delay
    7 min
    • Arrived on time 75% of the time (20 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 62% on time; Before 9 AM: 84%).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (20 flights), so its score leans on the airline's record at this hour.

    Limited track record · 20 flights

    Find 7:50 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)76%

    350 flights · 80% on time as flown · 4.2% cancel

  • Envoy Air (sold as American Eagle)73%

    745 flights · 76% on time as flown · 3.3% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)65%

    466 flights · 68% on time as flown · 4.1% cancel

  • American Airlines62%

    54 flights · 59% on time as flown · 5.4% cancel

  • PSA Airlines (sold as American Eagle)49%

    152 flights · 43% on time as flown · 5.3% cancel

On time by departure time

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

  • Before 9 AM84%

    425 flights · avg delay 9 min

  • Noon to 3 PM72%

    334 flights · avg delay 18 min

  • 3 to 6 PM70%

    499 flights · avg delay 21 min

  • 6 to 9 PM62%

    438 flights · avg delay 35 min

Smarter routing

Nearby airports that run more on time

  • ORD → AVL 73% chance on time

    Chicago O'Hare International Airport to Asheville Regional Airport · 1,372 flights a year · 42 mi from your airports · yours: 69%

    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
72
F
81
M
76
A
84
M
74
J
71
J
70
A
76
S
80
O
76
N
81
D
78

What delays this route

  • Late-arriving aircraft46%
  • Airline (crew, maintenance, boarding)29%
  • Air traffic control and airport volume19%
  • Severe weather6%

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 ORD to GSP…

ORD to GSP questions

What time of day is best to fly ORD to GSP?
Before 9 AM: 84% of flights arrived on time, against 62% 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 ORD to GSP?
Republic, with a season-adjusted 76% chance of operating and arriving on time over 350 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 ORD to GSP?
July (70% on time); the best was April (84%), 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 ORD

Live status: FAA delays and ground stops