Atlanta (ATL) to Knoxville (TYS): On-Time Performance
Data through July 2026
When you fly ATL to TYS matters as much as anything else about the booking: the route swung from 94% on-time in October 2024 to just 58% in June 2025. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 76%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 4.7
- last 12 months
- Duration
- 56m
- scheduled
- Distance
- 152 mi
Best airline from ATL to TYS
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Endeavor Airmost reliable | 84% | 15 min | 0.5% | 630 |
| Delta Air Lines | 81% | 12 min | 1.7% | 3,356 |
Monthly on-time trend
Best time to fly from ATL to TYS
Aim for departures around 9 a.m. (89% on-time); avoid 4 p.m. departures (70%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 11 min |
| Tuesdaybest | 85% | 10 min |
| Wednesday | 84% | 11 min |
| Thursday | 82% | 11 min |
| Friday | 78% | 15 min |
| Saturday | 84% | 11 min |
| Sunday | 77% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft27%
- Airline operations56%
- National airspace system11%
- Weather7%
Frequently asked questions
- How often are flights from ATL to TYS delayed?
- 18% of ATL–TYS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from ATL to TYS?
- Endeavor Air has the best on-time record on this route at 84%, based on 630 flights. 2 airlines flew ATL–TYS frequently enough to compare in this period.
- What is the best time of day to fly from ATL to TYS?
- Departures around 9 a.m. have the best record (89% on-time), while departures around 4 p.m. have the worst (70%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ATL to TYS?
- The scheduled ATL–TYS flight time averages 56m over 152 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are ATL to TYS flights cancelled?
- 1.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from ATL to TYS?
- June 2025 was the roughest month in this dataset, with only 58% of arrivals on time. The best was October 2024 at 94%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 3,986 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.