Route on-time record
TYS to DEN: most on-time flights and the best time to fly
Knoxville/Maryville (McGhee Tyson Airport) to Denver (Denver International Airport). 938 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 0.5% were cancelled. The most reliable flight number was SkyWest 5673 at 8:30 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
TYS → DEN
Knoxville/Maryville to Denver: 938 nonstop flights a year
On time (12 months)
84%
Cancelled
0.5%
avg delay 14 min
Best time to leave
Before 9 AM
93% on time vs 76% 6 to 9 PM
Most reliable airline
SkyWest
90% chance on time
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 5673 · sold as United Express, Delta Connection, American Eagle or Alaska
8:30 AM → 10:10 AM3h 40m nonstop
Local times, typical schedule. Last flown 2026-04-29.
92%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.9%
- Avg arrival delay
- 7 min
- Arrived on time 93% of the time (326 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 76%).
Strong track record · 326 flights
Find 8:30 AM flight fares Opens this date on Aviasales#2 · United 1256
8:45 AM → 10:08 AM3h 23m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 94% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 76%).
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find United 1256 fares Opens this date on Aviasales#3 · Southwest 3550
12:20 PM → 1:40 PM3h 20m nonstop
Local times, typical schedule. Last flown 2026-05-30.
87%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Short track record (8 flights), so its score leans on the route's record at this hour.
Limited track record · 8 flights
Find Southwest 3550 fares Opens this date on Aviasales#4 · United 1588
4:20 PM → 5:47 PM3h 27m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 2104; its record covers all of them.
82%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 89% of the time (45 flights, Jun 2025 to May 2026).
- Never cancelled in 45 scheduled flights.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (45 flights), so its score leans on the airline's record at this hour.
Limited track record · 45 flights
Find United 1588 fares Opens this date on Aviasales#5 · United 1729
4:30 PM → 5:56 PM3h 26m nonstop
Local times, typical schedule. Last flown 2026-04-29. Same departure also flew as United 1226; its record covers all of them.
80%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 90% of the time (30 flights, Jun 2025 to May 2026).
- Never cancelled in 30 scheduled flights.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (30 flights), so its score leans on the airline's record at this hour.
Limited track record · 30 flights
Find United 1729 fares Opens this date on Aviasales#6 · United 720
4:56 PM → 6:20 PM3h 24m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 24 min
- Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 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 United 720 fares Opens this date on Aviasales#7 · Frontier 4369
4:20 PM → 5:52 PM3h 32m nonstop
Local times, typical schedule. Last flown 2026-05-29.
72%
chance on time
- On time (history)
- 72%
- Cancelled
- 0.0%
- Avg arrival delay
- 26 min
- Arrived on time 72% of the time (123 flights, Jun 2025 to May 2026).
- Never cancelled in 123 scheduled flights.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 123 flights
Find Frontier 4369 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)90%
424 flights · 93% on time as flown · 1.0% cancel
- Allegiant Air80%
67 flights · 75% on time as flown · 0.4% cancel
- United Airlines79%
305 flights · 78% on time as flown · 0.2% cancel
- Frontier Airlines75%
126 flights · 71% on time as flown · 0.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM93%
320 flights · avg delay 6 min
- 9 AM to noon90%
87 flights · avg delay 10 min
- 3 to 6 PM77%
463 flights · avg delay 21 min
- 6 to 9 PM76%
51 flights · avg delay 11 min
Best day: Friday (87%). Worst: Monday (82%).
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
- Air traffic control and airport volume45%
- Airline (crew, maintenance, boarding)33%
- Late-arriving aircraft14%
- Severe weather8%
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 DEN questions
- What time of day is best to fly TYS to DEN?
- Before 9 AM: 93% of flights arrived on time, against 76% 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 TYS to DEN?
- SkyWest, with a season-adjusted 90% chance of operating and arriving on time over 424 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 DEN?
- June (72% on time); the best was March (93%), 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
- DEN to TYS (return)
- TYS to ORD 68%
- TYS to ATL 86%
- TYS to DFW 77%
- TYS to DCA 70%
- TYS to CLT 79%
- TYS to SFB 69%
- TYS to PIE 75%
- TYS to FLL 55%
- TYS to MIA 80%
- TYS to PHL 84%
Live status: FAA delays and ground stops