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Route on-time record

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

Chicago (Chicago O'Hare International Airport) to Charleston (Charleston International Airport). 2,058 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 1.9% were cancelled. The most reliable flight number was United 2795 at 7:00 AM.

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

ORD → CHS

Chicago to Charleston: 2,058 nonstop flights a year

On time (12 months)

75%

Cancelled

1.9%

avg delay 16 min

Best time to leave

Before 9 AM

83% on time vs 64% 6 to 9 PM

Most reliable airline

Republic

80% chance on time

Check ORD to CHS 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 · United 2795

    7:00 AM → 10:23 AM2h 23m nonstop

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

    88%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 100% of the time (11 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 83% on time; 6 to 9 PM: 64%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find United 2795 fares Opens this date on Aviasales

  2. #2 · Republic 3646 · sold as American Eagle, Delta Connection or United Express

    10:35 AM → 2:06 PM2h 31m nonstop

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

    85%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    16 min
    • Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • 84% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find 10:35 AM flight fares Opens this date on Aviasales

  3. #3 · Republic 3532 · sold as American Eagle, Delta Connection or United Express

    2:05 PM → 5:40 PM2h 35m nonstop

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

    81%

    chance on time

    On time (history)
    82%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 82% 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 2:05 PM flight fares Opens this date on Aviasales

  4. #4 · Republic 4711 · sold as American Eagle, Delta Connection or United Express

    2:36 PM → 6:02 PM2h 26m nonstop

    Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as Republic 3655; its record covers all of them.

    80%

    chance on time

    On time (history)
    81%
    Cancelled
    3.6%
    Avg arrival delay
    13 min
    • Arrived on time 81% of the time (53 flights, Jun 2025 to May 2026).
    • Cancelled 3.6% of the time (2 of 55).
    • Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • 52% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 53 flights

    Find 2:36 PM flight fares Opens this date on Aviasales

  5. #5 · United 473

    10:30 AM → 1:51 PM2h 21m nonstop

    Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 247, 2465; its record covers all of them.

    78%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    20 min
    • Arrived on time 75% of the time (72 flights, Jun 2025 to May 2026).
    • Never cancelled in 73 scheduled flights.
    • 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 · 72 flights

    Find United 473 fares Opens this date on Aviasales

  6. #6 · Republic 3597 · sold as American Eagle, Delta Connection or United Express

    8:40 AM → 12:05 PM2h 25m nonstop

    Local times, typical schedule. Last flown 2026-03-28.

    76%

    chance on time

    On time (history)
    74%
    Cancelled
    1.3%
    Avg arrival delay
    15 min
    • Arrived on time 74% of the time (76 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 83% on time; 6 to 9 PM: 64%).
    • 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 · 76 flights

    Find 8:40 AM flight fares Opens this date on Aviasales

  7. #7 · Envoy 3551 · sold as American Eagle

    1:26 PM → 4:44 PM2h 18m nonstop

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

    76%

    chance on time

    On time (history)
    79%
    Cancelled
    3.7%
    Avg arrival delay
    11 min
    • Arrived on time 79% of the time (52 flights, Jun 2025 to May 2026).
    • Cancelled 3.7% of the time (2 of 54).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (52 flights), so its score leans on the airline's record at this hour.

    Limited track record · 52 flights

    Find 1:26 PM flight fares Opens this date on Aviasales

  8. #8 · United 2439

    9:00 AM → 12:17 PM2h 17m nonstop

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

    76%

    chance on time

    On time (history)
    83%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 83% of the time (18 flights, Jun 2025 to May 2026).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (18 flights), so its score leans on the airline's record at this hour.

    Limited track record · 18 flights

    Find United 2439 fares Opens this date on Aviasales

  9. #9 · American 2991

    8:31 AM → 11:49 AM2h 18m nonstop

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

    76%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 80% of the time (40 flights, Jun 2025 to May 2026).
    • Never cancelled in 40 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 83% on time; 6 to 9 PM: 64%).
    • 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 · 40 flights

    Find American 2991 fares Opens this date on Aviasales

  10. #10 · Republic 3582 · sold as American Eagle, Delta Connection or United Express

    9:00 AM → 12:25 PM2h 25m nonstop

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

    74%

    chance on time

    On time (history)
    66%
    Cancelled
    0.0%
    Avg arrival delay
    19 min
    • Arrived on time 66% of the time (32 flights, Jun 2025 to May 2026).
    • Never cancelled in 32 scheduled flights.
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
    • Short track record (32 flights), so its score leans on the airline's record at this hour.

    Limited track record · 32 flights

    Find 9:00 AM 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)80%

    472 flights · 82% on time as flown · 1.9% cancel

  • American Airlines73%

    188 flights · 74% on time as flown · 1.7% cancel

  • United Airlines73%

    742 flights · 74% on time as flown · 1.6% cancel

  • Envoy Air (sold as American Eagle)72%

    592 flights · 73% on time as flown · 2.4% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)70%

    63 flights · 66% on time as flown · 1.8% cancel

On time by departure time

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

  • Before 9 AM83%

    435 flights · avg delay 12 min

  • 9 AM to noon81%

    594 flights · avg delay 14 min

  • Noon to 3 PM79%

    260 flights · avg delay 12 min

  • 3 to 6 PM68%

    322 flights · avg delay 21 min

  • 6 to 9 PM64%

    442 flights · avg delay 23 min

Best day: Tuesday (83%). Worst: Sunday (78%).

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
75
F
83
M
76
A
81
M
79
J
84
J
72
A
82
S
85
O
83
N
84
D
83

What delays this route

  • Late-arriving aircraft43%
  • Airline (crew, maintenance, boarding)27%
  • Air traffic control and airport volume23%
  • 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

ORD to CHS questions

What time of day is best to fly ORD to CHS?
Before 9 AM: 83% of flights arrived on time, against 64% 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 CHS?
Republic, with a season-adjusted 80% chance of operating and arriving on time over 472 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 CHS?
July (72% on time); the best was September (85%), 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