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Route on-time record

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

Chicago (Chicago O'Hare International Airport) to Rochester (Frederick Douglass Greater Rochester International Airport). 2,275 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 2.0% were cancelled. The most reliable flight number was Republic 3511 at 7:00 AM.

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

ORD → ROC

Chicago to Rochester: 2,275 nonstop flights a year

On time (12 months)

75%

Cancelled

2.0%

avg delay 18 min

Best time to leave

Before 9 AM

85% on time vs 66% 6 to 9 PM

Most reliable airline

Envoy

78% chance on time

Check ORD to ROC fares

Lowest nonstop fare seen in the next two months: $240 (United 1568 on 2026-10-26). 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 3511 · sold as American Eagle, Delta Connection or United Express

    7:00 AM → 9:58 AM1h 58m nonstop

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

    89%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (21 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 85% on time; 6 to 9 PM: 66%).
    • 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 (21 flights), so its score leans on the airline's record at this hour.

    Limited track record · 21 flights

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

  2. #2 · Envoy 3775 · sold as American Eagle

    8:01 AM → 10:55 AM1h 54m nonstop

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

    84%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 85% on time; 6 to 9 PM: 66%).
    • 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 8:01 AM flight fares Opens this date on Aviasales

  3. #3 · Envoy 3838 · sold as American Eagle

    8:15 AM → 11:04 AM1h 49m nonstop

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

    82%

    chance on time

    On time (history)
    81%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 81% of the time (26 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 85% on time; 6 to 9 PM: 66%).
    • 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 (26 flights), so its score leans on the airline's record at this hour.

    Limited track record · 26 flights

    Find 8:15 AM flight fares Opens this date on Aviasales

  4. #4 · Republic 3629 · sold as American Eagle, Delta Connection or United Express

    12:08 PM → 3:05 PM1h 57m nonstop

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

    81%

    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 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 12:08 PM flight fares Opens this date on Aviasales

  5. #5 · Republic 3507 · sold as American Eagle, Delta Connection or United Express

    10:45 AM → 1:39 PM1h 55m nonstop

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

    81%

    chance on time

    On time (history)
    80%
    Cancelled
    0.7%
    Avg arrival delay
    14 min
    • Arrived on time 80% of the time (133 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).

    Moderate track record · 133 flights

    Find 10:45 AM flight fares Opens this date on Aviasales

  6. #6 · Envoy 3873 · sold as American Eagle

    8:44 PM → 11:42 PM1h 58m nonstop

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

    80%

    chance on time

    On time (history)
    86%
    Cancelled
    4.5%
    Avg arrival delay
    10 min
    • Arrived on time 86% of the time (42 flights, Jun 2025 to May 2026).
    • Cancelled 4.5% of the time (2 of 44).
    • Leaves in this route's least on-time window (6 to 9 PM: 66% on time; Before 9 AM: 85%).
    • 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 · 42 flights

    Find 8:44 PM flight fares Opens this date on Aviasales

  7. #7 · SkyWest 5919 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:06 AM → 10:03 AM1h 57m nonstop

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

    79%

    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.
    • Leaves in this route's most on-time window (Before 9 AM: 85% on time; 6 to 9 PM: 66%).
    • 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 · 53 flights

    Find 7:06 AM flight fares Opens this date on Aviasales

  8. #8 · Envoy 3823 · sold as American Eagle

    8:29 AM → 11:22 AM1h 53m nonstop

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

    79%

    chance on time

    On time (history)
    77%
    Cancelled
    0.0%
    Avg arrival delay
    14 min
    • Arrived on time 77% of the time (44 flights, Jun 2025 to May 2026).
    • Never cancelled in 44 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 85% on time; 6 to 9 PM: 66%).
    • 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 · 44 flights

    Find 8:29 AM flight fares Opens this date on Aviasales

  9. #9 · Envoy 3820 · sold as American Eagle

    1:39 PM → 4:32 PM1h 53m nonstop

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

    78%

    chance on time

    On time (history)
    85%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 85% of the time (41 flights, Jun 2025 to May 2026).
    • Never cancelled in 41 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 (41 flights), so its score leans on the airline's record at this hour.

    Limited track record · 41 flights

    Find 1:39 PM flight fares Opens this date on Aviasales

  10. #10 · Envoy 3582 · sold as American Eagle

    3:54 PM → 6:38 PM1h 44m nonstop

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

    74%

    chance on time

    On time (history)
    74%
    Cancelled
    2.9%
    Avg arrival delay
    23 min
    • Arrived on time 74% of the time (99 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.
    • 51% of its delay minutes came from the plane arriving late from an earlier flight.

    Moderate track record · 99 flights

    Find 3:54 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Envoy Air (sold as American Eagle)78%

    853 flights · 80% on time as flown · 2.2% cancel

  • Republic Airways (sold as American Eagle, Delta Connection or United Express)78%

    677 flights · 80% on time as flown · 2.1% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)66%

    160 flights · 64% on time as flown · 2.6% cancel

  • United Airlines63%

    585 flights · 64% on time as flown · 1.5% cancel

On time by departure time

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

  • Before 9 AM85%

    446 flights · avg delay 9 min

  • 9 AM to noon84%

    395 flights · avg delay 12 min

  • Noon to 3 PM68%

    413 flights · avg delay 22 min

  • 3 to 6 PM73%

    336 flights · avg delay 18 min

  • 6 to 9 PM66%

    584 flights · avg delay 24 min

  • After 9 PM67%

    101 flights · avg delay 23 min

Best day: Monday (79%). Worst: Sunday (72%).

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
72
M
78
A
80
M
78
J
77
J
69
A
74
S
80
O
82
N
82
D
72

What delays this route

  • Late-arriving aircraft46%
  • Airline (crew, maintenance, boarding)27%
  • Air traffic control and airport volume21%
  • 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

ORD to ROC questions

What time of day is best to fly ORD to ROC?
Before 9 AM: 85% of flights arrived on time, against 66% 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 ROC?
Envoy, with a season-adjusted 78% chance of operating and arriving on time over 853 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 ROC?
July (69% on time); the best was November (82%), 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