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Route on-time record

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

Chicago (Chicago O'Hare International Airport) to Chattanooga (Chattanooga Metropolitan Airport (Lovell Field)). 932 nonstop flights in Jun 2025 to May 2026, 70% arrived within 15 minutes and 4.7% were cancelled. The most reliable flight number was Envoy 4190 at 3:22 PM.

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

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ORD → CHA

Chicago to Chattanooga: 932 nonstop flights a year

On time (12 months)

70%

Cancelled

4.7%

avg delay 24 min

Best time to leave

Before 9 AM

74% on time vs 65% after 9 PM

Most reliable airline

Envoy

75% chance on time

Check ORD to CHA 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 · Envoy 4190 · sold as American Eagle

    3:22 PM → 6:14 PM1h 52m nonstop

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

    81%

    chance on time

    On time (history)
    91%
    Cancelled
    2.3%
    Avg arrival delay
    10 min
    • Arrived on time 91% of the time (43 flights, Jun 2025 to May 2026).
    • Departs inside ORD's trouble window: 43% of its 237 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 43 flights

    Find 3:22 PM flight fares Opens this date on Aviasales

  2. #2 · SkyWest 5600 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:15 AM → 10:07 AM1h 52m nonstop

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

    71%

    chance on time

    On time (history)
    87%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 87% of the time (15 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 74% on time; After 9 PM: 65%).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 43% of its 237 ground stops and delay programs started).

    Limited track record · 15 flights

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

  3. #3 · SkyWest 5582 · sold as United Express, Delta Connection, American Eagle or Alaska

    1:55 PM → 4:47 PM1h 52m nonstop

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

    68%

    chance on time

    On time (history)
    71%
    Cancelled
    3.8%
    Avg arrival delay
    17 min
    • Arrived on time 71% of the time (102 flights, Jun 2025 to May 2026).
    • Cancelled 3.8% of the time (4 of 106).
    • Departs outside ORD's trouble window (2 PM to 8 PM, when 43% of its 237 ground stops and delay programs started).

    Moderate track record · 102 flights

    Find 1:55 PM flight fares Opens this date on Aviasales

  4. #4 · Republic 4724 · sold as American Eagle, Delta Connection or United Express

    3:09 PM → 6:09 PM2h 00m nonstop

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

    65%

    chance on time

    On time (history)
    73%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
    • Departs inside ORD's trouble window: 43% of its 237 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 11 flights

    Find 3:09 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)75%

    175 flights · 79% on time as flown · 3.7% cancel

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

    521 flights · 69% on time as flown · 5.2% cancel

  • Republic Airways (sold as American Eagle, Delta Connection or United Express)64%

    236 flights · 66% on time as flown · 4.7% cancel

On time by departure time

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

  • Before 9 AM74%

    81 flights · avg delay 25 min

  • 9 AM to noon73%

    111 flights · avg delay 18 min

  • Noon to 3 PM70%

    208 flights · avg delay 15 min

  • 3 to 6 PM67%

    223 flights · avg delay 35 min

  • 6 to 9 PM71%

    278 flights · avg delay 25 min

  • After 9 PM65%

    31 flights · avg delay 16 min

Best day: Saturday (78%). Worst: Sunday (65%).

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
61
F
74
M
70
A
78
M
72
J
77
J
70
A
78
S
81
O
76
N
80
D
75

What delays this route

  • Airline (crew, maintenance, boarding)44%
  • Late-arriving aircraft27%
  • Air traffic control and airport volume18%
  • Severe weather12%

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 CHA…

ORD to CHA questions

What time of day is best to fly ORD to CHA?
Before 9 AM: 74% of flights arrived on time, against 65% for departures after 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 CHA?
Envoy, with a season-adjusted 75% chance of operating and arriving on time over 175 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 CHA?
January (61% on time); the best was September (81%), 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.

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Live status: FAA delays and ground stops