Route on-time record

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

Chicago (Chicago O'Hare International Airport) to Knoxville/Maryville (McGhee Tyson Airport). 2,231 nonstop flights in Jun 2025 to May 2026, 66% arrived within 15 minutes and 3.6% were cancelled. The most reliable flight number was SkyWest 4736 at 7:15 AM.

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

ORD → TYS

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

On time (12 months)

66%

Cancelled

3.6%

avg delay 37 min

Best time to leave

Before 9 AM

79% on time vs 53% 6 to 9 PM

Most reliable airline

Envoy

73% chance on time

Check ORD to TYS fares

Lowest nonstop fare seen in the next two months: $333 (American 4739 on 2026-10-22). 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 · SkyWest 4736 · sold as United Express, Delta Connection, American Eagle or Alaska
7:15 AM → 10:06 AM1h 51m nonstop
Local times, typical schedule. Last flown 2026-05-19. Same departure also flew as SkyWest 5726; its record covers all of them.
79%
chance on time
On time (history)
81%
Cancelled
0.8%
Avg arrival delay
14 min
- Arrived on time 81% of the time (253 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 79% on time; 6 to 9 PM: 53%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Strong track record · 253 flights
Find 7:15 AM flight fares Opens this date on Aviasales
#2 · Envoy 3479 · sold as American Eagle
8:10 AM → 10:57 AM1h 47m nonstop
Local times, typical schedule. Last flown 2026-05-20.
78%
chance on time
On time (history)
86%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 86% of the time (14 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 79% on time; 6 to 9 PM: 53%).
- 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 (14 flights), so its score leans on the airline's record at this hour.
Limited track record · 14 flights
Find 8:10 AM flight fares Opens this date on Aviasales
#3 · Envoy 3483 · sold as American Eagle
1:51 PM → 4:39 PM1h 48m nonstop
Local times, typical schedule. Last flown 2026-05-20.
73%
chance on time
On time (history)
86%
Cancelled
0.0%
Avg arrival delay
15 min
- Arrived on time 86% of the time (14 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).
- 64% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (14 flights), so its score leans on the airline's record at this hour.
Limited track record · 14 flights
Find 1:51 PM flight fares Opens this date on Aviasales
#4 · SkyWest 6325 · sold as United Express, Delta Connection, American Eagle or Alaska
9:48 AM → 12:42 PM1h 54m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
On time (history)
73%
Cancelled
0.0%
Avg arrival delay
33 min
- Arrived on time 73% 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).
- 81% 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 9:48 AM flight fares Opens this date on Aviasales
#5 · SkyWest 6197 · sold as United Express, Delta Connection, American Eagle or Alaska
2:51 PM → 5:45 PM1h 54m nonstop
Local times, typical schedule. Last flown 2026-05-31.
70%
chance on time
On time (history)
80%
Cancelled
9.1%
Avg arrival delay
7 min
- Arrived on time 80% of the time (10 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 (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find 2:51 PM flight fares Opens this date on Aviasales
#6 · SkyWest 5752 · sold as United Express, Delta Connection, American Eagle or Alaska
2:00 PM → 5:00 PM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
69%
chance on time
On time (history)
78%
Cancelled
0.0%
Avg arrival delay
9 min
- Arrived on time 78% of the time (9 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 (9 flights), so its score leans on the airline's record at this hour.
Limited track record · 9 flights
Find 2:00 PM flight fares Opens this date on Aviasales
#7 · SkyWest 6445 · sold as United Express, Delta Connection, American Eagle or Alaska
8:05 AM → 10:59 AM1h 54m nonstop
Local times, typical schedule. Last flown 2026-05-31.
69%
chance on time
On time (history)
64%
Cancelled
0.0%
Avg arrival delay
24 min
- Arrived on time 64% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 79% on time; 6 to 9 PM: 53%).
- 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 8:05 AM flight fares Opens this date on Aviasales
#8 · PSA 5660 · sold as American Eagle
8:30 AM → 11:18 AM1h 48m nonstop
Local times, typical schedule. Last flown 2026-05-06.
69%
chance on time
On time (history)
87%
Cancelled
0.0%
Avg arrival delay
13 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 (Before 9 AM: 79% on time; 6 to 9 PM: 53%).
- 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 · 30 flights
Find 8:30 AM flight fares Opens this date on Aviasales
#9 · SkyWest 4714 · sold as United Express, Delta Connection, American Eagle or Alaska
10:29 AM → 1:18 PM1h 49m nonstop
Local times, typical schedule. Last flown 2026-05-31.
68%
chance on time
On time (history)
64%
Cancelled
0.0%
Avg arrival delay
27 min
- Arrived on time 64% 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 10:29 AM flight fares Opens this date on Aviasales
#10 · SkyWest 5958 · sold as United Express, Delta Connection, American Eagle or Alaska
2:06 PM → 5:01 PM1h 55m nonstop
Local times, typical schedule. Last flown 2026-04-29.
68%
chance on time
On time (history)
72%
Cancelled
0.0%
Avg arrival delay
19 min
- Arrived on time 72% of the time (25 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 (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find 2:06 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)73%
122 flights · 82% on time as flown · 2.0% cancel
Republic Airways (sold as American Eagle, Delta Connection or United Express)72%
108 flights · 79% on time as flown · 2.1% cancel
SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)69%
772 flights · 71% on time as flown · 2.2% cancel
United Airlines59%
317 flights · 60% on time as flown · 2.7% cancel
PSA Airlines (sold as American Eagle)57%
912 flights · 59% on time as flown · 6.0% cancel

On time by departure time

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

Before 9 AM79%
392 flights · avg delay 19 min
9 AM to noon74%
531 flights · avg delay 26 min
Noon to 3 PM64%
528 flights · avg delay 39 min
3 to 6 PM61%
161 flights · avg delay 34 min
6 to 9 PM53%
609 flights · avg delay 57 min

Best day: Tuesday (76%). Worst: Friday (69%).

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.

What delays this route

Late-arriving aircraft55%
Airline (crew, maintenance, boarding)24%
Air traffic control and airport volume11%
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

ORD to TYS questions

What time of day is best to fly ORD to TYS?: Before 9 AM: 79% of flights arrived on time, against 53% 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 TYS?: Envoy, with a season-adjusted 73% chance of operating and arriving on time over 122 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 TYS?: January (65% on time); the best was September (77%), 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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