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Route on-time record

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

Knoxville/Maryville (McGhee Tyson Airport) to Chicago (Chicago O'Hare International Airport). 2,231 nonstop flights in Jun 2025 to May 2026, 68% arrived within 15 minutes and 3.8% were cancelled. The most reliable flight number was United 1856 at 7:00 AM.

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

TYS → ORD

Knoxville/Maryville to Chicago: 2,231 nonstop flights a year

On time (12 months)

68%

Cancelled

3.8%

avg delay 34 min

Best time to leave

9 AM to noon

78% on time vs 52% 6 to 9 PM

Most reliable airline

United

80% chance on time

Check TYS to ORD 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 1856

    7:00 AM → 7:55 AM1h 56m nonstop

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

    82%

    chance on time

    On time (history)
    83%
    Cancelled
    1.3%
    Avg arrival delay
    10 min
    • Arrived on time 83% of the time (76 flights, Jun 2025 to May 2026).

    Moderate track record · 76 flights

    Find United 1856 fares Opens this date on Aviasales

  2. #2 · SkyWest 6216 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:10 AM → 8:20 AM2h 10m nonstop

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

    79%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 100% of the time (11 flights, Jun 2025 to May 2026).
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find 7:10 AM flight fares Opens this date on Aviasales

  3. #3 · United 2805

    6:30 AM → 7:29 AM1h 59m nonstop

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

    79%

    chance on time

    On time (history)
    73%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find United 2805 fares Opens this date on Aviasales

  4. #4 · SkyWest 4745 · sold as United Express, Delta Connection, American Eagle or Alaska

    10:49 AM → 11:53 AM2h 04m nonstop

    Local times, typical schedule. Last flown 2026-05-19. Same departure also flew as SkyWest 5921; its record covers all of them.

    79%

    chance on time

    On time (history)
    82%
    Cancelled
    1.6%
    Avg arrival delay
    21 min
    • Arrived on time 82% of the time (249 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 78% on time; 6 to 9 PM: 52%).

    Strong track record · 249 flights

    Find 10:49 AM flight fares Opens this date on Aviasales

  5. #5 · PSA 5513 · sold as American Eagle

    7:50 AM → 9:07 AM2h 17m nonstop

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

    72%

    chance on time

    On time (history)
    86%
    Cancelled
    3.3%
    Avg arrival delay
    12 min
    • Arrived on time 86% of the time (29 flights, Jun 2025 to May 2026).
    • Cancelled 3.3% of the time (1 of 30).
    • Short track record (29 flights), so its score leans on the airline's record at this hour.

    Limited track record · 29 flights

    Find 7:50 AM flight fares Opens this date on Aviasales

  6. #6 · Envoy 3479 · sold as American Eagle

    11:31 AM → 12:34 PM2h 03m nonstop

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

    71%

    chance on time

    On time (history)
    79%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 79% of the time (14 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 78% on time; 6 to 9 PM: 52%).
    • Short track record (14 flights), so its score leans on the airline's record at this hour.

    Limited track record · 14 flights

    Find 11:31 AM flight fares Opens this date on Aviasales

  7. #7 · SkyWest 6312 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:53 AM → 9:07 AM2h 14m nonstop

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

    69%

    chance on time

    On time (history)
    62%
    Cancelled
    0.0%
    Avg arrival delay
    38 min
    • Arrived on time 62% of the time (13 flights, Jun 2025 to May 2026).
    • Short track record (13 flights), so its score leans on the airline's record at this hour.

    Limited track record · 13 flights

    Find 7:53 AM flight fares Opens this date on Aviasales

  8. #8 · PSA 5318 · sold as American Eagle

    7:40 AM → 8:48 AM2h 08m nonstop

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

    68%

    chance on time

    On time (history)
    73%
    Cancelled
    13.3%
    Avg arrival delay
    33 min
    • Arrived on time 73% of the time (26 flights, Jun 2025 to May 2026).
    • Cancelled 13.3% of the time (4 of 30).
    • Short track record (26 flights), so its score leans on the airline's record at this hour.

    Limited track record · 26 flights

    Find 7:40 AM flight fares Opens this date on Aviasales

  9. #9 · PSA 5468 · sold as American Eagle

    11:31 AM → 12:35 PM2h 04m nonstop

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

    68%

    chance on time

    On time (history)
    87%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 87% of the time (30 flights, Jun 2025 to May 2026).
    • Never cancelled in 30 scheduled flights.
    • Leaves in this route's most on-time window (9 AM to noon: 78% on time; 6 to 9 PM: 52%).
    • Short track record (30 flights), so its score leans on the airline's record at this hour.

    Limited track record · 30 flights

    Find 11:31 AM flight fares Opens this date on Aviasales

  10. #10 · United 1393

    6:01 PM → 6:55 PM1h 54m nonstop

    Local times, typical schedule. Last flown 2026-05-18.

    67%

    chance on time

    On time (history)
    62%
    Cancelled
    0.0%
    Avg arrival delay
    73 min
    • Arrived on time 62% of the time (13 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 52% on time; 9 AM to noon: 78%).
    • Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (13 flights), so its score leans on the airline's record at this hour.

    Limited track record · 13 flights

    Find United 1393 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines80%

    317 flights · 87% on time as flown · 2.9% cancel

  • Republic Airways (sold as American Eagle, Delta Connection or United Express)71%

    109 flights · 73% on time as flown · 2.2% cancel

  • Envoy Air (sold as American Eagle)69%

    122 flights · 74% on time as flown · 2.1% cancel

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

    771 flights · 68% on time as flown · 2.7% cancel

  • PSA Airlines (sold as American Eagle)58%

    912 flights · 60% on time as flown · 5.9% cancel

On time by departure time

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

  • Before 9 AM78%

    697 flights · avg delay 26 min

  • 9 AM to noon78%

    402 flights · avg delay 24 min

  • Noon to 3 PM64%

    392 flights · avg delay 44 min

  • 3 to 6 PM56%

    584 flights · avg delay 38 min

  • 6 to 9 PM52%

    155 flights · avg delay 58 min

Best day: Saturday (78%). Worst: Thursday (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
79
M
72
A
78
M
76
J
75
J
72
A
77
S
79
O
81
N
75
D
68

What delays this route

  • Late-arriving aircraft39%
  • Airline (crew, maintenance, boarding)33%
  • Air traffic control and airport volume18%
  • Severe weather10%

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

TYS to ORD questions

What time of day is best to fly TYS to ORD?
9 AM to noon: 78% of flights arrived on time, against 52% for departures 6 to 9 PM.
Which airline is most on time from TYS to ORD?
United, with a season-adjusted 80% chance of operating and arriving on time over 317 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 TYS to ORD?
December (68% on time); the best was October (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.

More routes from TYS

Live status: FAA delays and ground stops